:root {
  --bg: #f4f2eb;
  --bg-2: #eeece3;
  --surface: #fffefa;
  --surface-2: #f1efe7;
  --surface-3: #e9e6dc;
  --ink: #17211b;
  --ink-2: #334139;
  --muted: #69736c;
  --muted-2: #8b938d;
  --line: #e2dfd4;
  --line-strong: #d2cfc2;
  --brand: #176b54;
  --brand-dark: #0e4f3e;
  --brand-soft: #dcece5;
  --amber: #b7791f;
  --amber-2: #d99a35;
  --amber-soft: #f8ead2;
  --danger: #b9483d;
  --danger-soft: #f8e1dd;
  --success: #1f7a5c;
  --success-soft: #dff1e8;
  --warning: #d99a35;
  --warning-soft: #f8ead2;
  --info: #3b6ea8;
  --info-soft: #e1ebf7;
  --sidebar: #12201a;
  --sidebar-2: #1a2d24;
  --sidebar-ink: #e9f0eb;
  --sidebar-muted: #9db0a4;
  --shadow-xs: 0 1px 2px rgba(23, 33, 27, 0.04);
  --shadow-sm: 0 3px 12px rgba(23, 33, 27, 0.05);
  --shadow-md: 0 14px 36px rgba(23, 33, 27, 0.08);
  --shadow-lg: 0 24px 70px rgba(23, 33, 27, 0.14);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --font: "Segoe UI Variable Text", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", -apple-system, BlinkMacSystemFont,
    Roboto, "Helvetica Neue", Arial, sans-serif;
  --mobile-nav-height: 66px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  color: var(--brand-dark);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

img,
svg {
  vertical-align: middle;
}

::selection {
  background: var(--brand-soft);
  color: var(--brand-dark);
}

:focus-visible {
  outline: 3px solid rgba(23, 107, 84, 0.35);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden,
[hidden] {
  display: none !important;
}

.muted {
  color: var(--muted);
}

.text-danger {
  color: var(--danger);
}

.text-success {
  color: var(--success);
}

.nowrap {
  white-space: nowrap;
}

/* Subject tones */
.tone-0 {
  --tone: #176b54;
  --tone-soft: #dcece5;
  --tone-ink: #0e4f3e;
}
.tone-1 {
  --tone: #b7791f;
  --tone-soft: #f8ead2;
  --tone-ink: #7c4f0e;
}
.tone-2 {
  --tone: #3b6ea8;
  --tone-soft: #e0eaf7;
  --tone-ink: #284f7d;
}
.tone-3 {
  --tone: #a34d6b;
  --tone-soft: #f5dfe7;
  --tone-ink: #77334c;
}
.tone-4 {
  --tone: #6a4c93;
  --tone-soft: #e9e2f4;
  --tone-ink: #4b336c;
}
.tone-5 {
  --tone: #2b7f7a;
  --tone-soft: #d9efed;
  --tone-ink: #1b5c58;
}

/* ------------------------------------------------------------------ */
/* Buttons                                                             */
/* ------------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 10px 17px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition:
    background 0.16s ease,
    border-color 0.16s ease,
    color 0.16s ease,
    transform 0.16s ease,
    box-shadow 0.16s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  box-shadow: 0 6px 16px rgba(23, 107, 84, 0.18);
}

.btn-primary:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--ink);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  border-color: var(--ink-2);
  background: #fff;
}

.btn-ghost {
  color: var(--ink-2);
}

.btn-ghost:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.btn-soft {
  background: var(--brand-soft);
  color: var(--brand-dark);
}

.btn-soft:hover {
  background: #cfe4da;
  color: var(--brand-dark);
}

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: #9e382f;
  border-color: #9e382f;
  color: #fff;
}

.btn-danger-soft {
  background: var(--danger-soft);
  color: var(--danger);
}

.btn-danger-soft:hover {
  background: #f3d2cd;
  color: var(--danger);
}

.btn-amber {
  background: var(--amber);
  border-color: var(--amber);
  color: #fff;
}

.btn-amber:hover {
  background: #9a6519;
  border-color: #9a6519;
  color: #fff;
}

.btn-sm {
  min-height: 34px;
  padding: 7px 12px;
  font-size: 13px;
  border-radius: 9px;
}

.btn-lg {
  min-height: 50px;
  padding: 13px 22px;
  font-size: 15px;
  border-radius: 14px;
}

.btn-block {
  width: 100%;
}

.btn .icon {
  flex: 0 0 auto;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition:
    background 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease;
}

.icon-btn:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.icon-btn-sm {
  width: 30px;
  height: 30px;
  border-radius: 8px;
}

/* ------------------------------------------------------------------ */
/* Cards, chips, progress                                              */
/* ------------------------------------------------------------------ */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
}

.card-pad {
  padding: 22px;
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.card-head h2,
.card-head h3 {
  font-size: 18px;
}

.card-head p {
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 3px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-xs);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.01em;
  line-height: 1.5;
  white-space: nowrap;
}

.chip-brand {
  background: var(--brand-soft);
  color: var(--brand-dark);
}

.chip-amber,
.chip-medium {
  background: var(--amber-soft);
  color: #7c4f0e;
}

.chip-danger,
.chip-hard {
  background: var(--danger-soft);
  color: #8f3229;
}

.chip-success,
.chip-easy {
  background: var(--success-soft);
  color: #125c44;
}

.chip-info {
  background: var(--info-soft);
  color: #28527f;
}

.chip-outline {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--muted);
}

.progress {
  position: relative;
  width: 100%;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-3);
}

.progress > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--tone, var(--brand));
  transition: width 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.progress-sm {
  height: 5px;
}

.progress-success > span {
  background: var(--success);
}

.progress-warning > span {
  background: var(--amber-2);
}

.progress-danger > span {
  background: var(--danger);
}

.bar-fill.progress-success {
  background: var(--success);
}

.bar-fill.progress-warning {
  background: var(--warning);
}

.bar-fill.progress-danger {
  background: var(--danger);
}

.progress-ink > span {
  background: rgba(255, 255, 255, 0.9);
}

.avatar {
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
  width: var(--avatar-size, 40px);
  height: var(--avatar-size, 40px);
  overflow: hidden;
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--ink);
  font-size: calc(var(--avatar-size, 40px) * 0.34);
  font-weight: 750;
  letter-spacing: -0.03em;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-initials {
  background: var(--tone-soft);
  color: var(--tone-ink);
}

/* ------------------------------------------------------------------ */
/* Forms                                                               */
/* ------------------------------------------------------------------ */

.field {
  display: grid;
  gap: 6px;
}

.field > label {
  font-size: 12.5px;
  font-weight: 650;
  color: var(--ink-2);
}

.input,
.select,
.textarea {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  outline: none;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.textarea {
  min-height: 140px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.55;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(23, 107, 84, 0.12);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--muted-2);
}

.select {
  cursor: pointer;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 16px) 18px,
    calc(100% - 11px) 18px;
  background-size:
    5px 5px,
    5px 5px;
  background-repeat: no-repeat;
  padding-right: 32px;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 180px;
}

.search-box > .icon {
  position: absolute;
  left: 12px;
  top: 50%;
  z-index: 1;
  color: var(--muted-2);
  pointer-events: none;
  transform: translateY(-50%);
}

.search-box > .input {
  padding-left: 38px;
}

/* ------------------------------------------------------------------ */
/* Splash, loading, empty states                                       */
/* ------------------------------------------------------------------ */

.boot-splash {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 100vh;
  color: var(--brand);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.noscript {
  padding: 30px;
  text-align: center;
}

.spinner {
  display: inline-block;
  width: 17px;
  height: 17px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 280px;
  color: var(--muted);
  font-size: 14px;
}

.empty-state {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 46px 24px;
  text-align: center;
}

.empty-state h3 {
  font-size: 19px;
  margin-top: 4px;
}

.empty-state p {
  max-width: 430px;
  color: var(--muted);
  font-size: 14px;
}

.empty-state .btn {
  margin-top: 10px;
}

.empty-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--brand-soft);
  color: var(--brand);
}

.empty-icon.error {
  background: var(--danger-soft);
  color: var(--danger);
}

.error-panel {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 40px 24px;
  text-align: center;
}

.error-panel h3 {
  font-size: 19px;
}

.error-panel p {
  max-width: 420px;
  color: var(--muted);
}

/* ------------------------------------------------------------------ */
/* Login                                                               */
/* ------------------------------------------------------------------ */

.login-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  min-height: 100vh;
}

.login-brand-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  padding: 52px 58px;
  background:
    radial-gradient(circle at 85% 12%, rgba(231, 163, 62, 0.2), transparent 34%),
    radial-gradient(circle at 5% 90%, rgba(43, 127, 122, 0.24), transparent 42%),
    var(--sidebar);
  color: var(--sidebar-ink);
}

.login-brand-panel::before,
.login-brand-panel::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.login-brand-panel::before {
  width: 540px;
  height: 540px;
  right: -250px;
  top: 20%;
}

.login-brand-panel::after {
  width: 340px;
  height: 340px;
  right: -140px;
  top: 31%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--brand);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.035em;
}

.brand:hover {
  color: var(--brand);
}

.login-brand-panel .brand {
  color: #fff;
}

.logo-mark {
  flex: 0 0 auto;
}

.login-hero {
  position: relative;
  z-index: 1;
  max-width: 540px;
  margin: 44px 0;
}

.login-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: #d6e5da;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.login-hero h1 {
  margin: 20px 0 18px;
  color: #fff;
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.login-hero h1 em {
  color: #e7a33e;
  font-style: normal;
}

.login-hero > p {
  max-width: 440px;
  color: #b8c9be;
  font-size: 16px;
  line-height: 1.65;
}

.login-features {
  display: grid;
  gap: 14px;
  margin-top: 32px;
}

.login-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: #dbe7df;
  font-size: 14px;
}

.login-feature-icon {
  display: grid;
  flex: 0 0 34px;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.09);
  color: #e7a33e;
}

.login-feature strong {
  display: block;
  color: #fff;
  font-size: 13.5px;
  font-weight: 650;
}

.login-feature span {
  color: #a8bcae;
  font-size: 12.5px;
}

.login-footer-note {
  position: relative;
  z-index: 1;
  color: #82998a;
  font-size: 12px;
}

.login-form-panel {
  display: grid;
  place-items: center;
  padding: 48px 28px;
  background:
    radial-gradient(circle at 100% 0%, rgba(23, 107, 84, 0.06), transparent 38%),
    var(--bg);
}

.login-card {
  width: 100%;
  max-width: 430px;
}

.login-mobile-brand {
  display: none;
  margin-bottom: 28px;
}

.login-card h2 {
  margin-bottom: 8px;
  font-size: 32px;
  letter-spacing: -0.04em;
}

.login-card > p {
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 14.5px;
}

.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  width: 100%;
  min-height: 52px;
  padding: 12px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  background: #fff;
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 650;
  box-shadow: var(--shadow-sm);
  transition:
    border-color 0.16s ease,
    box-shadow 0.16s ease,
    transform 0.16s ease;
}

.google-btn:hover {
  border-color: #b9b6a9;
  box-shadow: var(--shadow-md);
  color: var(--ink);
  transform: translateY(-1px);
}

.google-btn svg {
  flex: 0 0 auto;
}

.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 22px 0;
  color: var(--muted-2);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.login-divider::before,
.login-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.dev-form {
  display: grid;
  gap: 13px;
}

.dev-form .check-row {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.5;
}

.dev-form .check-row input {
  margin-top: 2px;
  accent-color: var(--brand);
}

.login-note {
  margin-top: 22px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 254, 250, 0.65);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.login-note strong {
  color: var(--ink-2);
}

.login-alert {
  margin-bottom: 18px;
  padding: 12px 14px;
  border: 1px solid #efc9c3;
  border-radius: 11px;
  background: var(--danger-soft);
  color: #8f3229;
  font-size: 13px;
}

/* ------------------------------------------------------------------ */
/* App shell                                                           */
/* ------------------------------------------------------------------ */

.shell {
  display: grid;
  grid-template-columns: 264px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 22px 16px 16px;
  overflow-y: auto;
  background:
    radial-gradient(circle at 15% 0%, rgba(43, 127, 122, 0.15), transparent 32%),
    radial-gradient(circle at 100% 100%, rgba(231, 163, 62, 0.08), transparent 35%),
    var(--sidebar);
  color: var(--sidebar-ink);
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
  z-index: 40;
}

.sidebar .brand {
  padding: 4px 8px 2px;
  color: #fff;
}

.sidebar-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-close {
  display: none;
  color: var(--sidebar-muted);
}

.sidebar-close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.sidebar-tagline {
  padding: 4px 9px 20px;
  color: #80998a;
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.nav-group {
  display: grid;
  gap: 3px;
}

.nav-label {
  padding: 18px 10px 7px;
  color: #71897b;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 9px 10px;
  border-radius: 10px;
  color: #b9c9be;
  font-size: 13.5px;
  font-weight: 550;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-link.is-active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-weight: 650;
}

.nav-link .icon {
  flex: 0 0 auto;
  color: #8fa79a;
}

.nav-link.is-active .icon {
  color: #e7a33e;
}

.nav-link-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-badge {
  display: inline-grid;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  place-items: center;
  border-radius: 999px;
  background: #e7a33e;
  color: #20170a;
  font-size: 10.5px;
  font-weight: 800;
}

.nav-badge-muted {
  background: rgba(255, 255, 255, 0.1);
  color: #c4d2c9;
  font-weight: 650;
}

.sidebar-subjects {
  display: grid;
  gap: 2px;
  margin-top: 4px;
}

.sidebar-subject {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 8px;
  color: #9fb2a6;
  font-size: 12.5px;
  overflow: hidden;
}

.sidebar-subject:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.sidebar-subject-dot {
  flex: 0 0 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--tone);
}

.sidebar-subject-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-spacer {
  flex: 1;
  min-height: 24px;
}

.sidebar-teacher-link {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 8px 0;
  padding: 11px 12px;
  border: 1px solid rgba(231, 163, 62, 0.22);
  border-radius: 11px;
  background: rgba(231, 163, 62, 0.08);
  color: #f1d3a1;
  font-size: 12.5px;
  font-weight: 650;
}

.sidebar-teacher-link:hover {
  background: rgba(231, 163, 62, 0.14);
  color: #fff;
}

.sidebar-footer {
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 6px;
  border-radius: 10px;
}

.user-card-text {
  flex: 1;
  min-width: 0;
}

.user-card-name {
  overflow: hidden;
  color: #f1f5f2;
  font-size: 12.5px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-card-role {
  overflow: hidden;
  color: #849b8c;
  font-size: 10.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-card .icon-btn {
  color: #849b8c;
}

.user-card .icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.main-area {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.mobile-bar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 30;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  background: rgba(244, 242, 235, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.mobile-bar .brand {
  font-size: 17px;
}

.mobile-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.mobile-nav {
  display: none;
}

.sidebar-scrim {
  display: none;
}

.page {
  flex: 1;
  width: 100%;
  max-width: 1210px;
  margin: 0 auto;
  padding: 38px 44px 80px;
  animation: page-in 0.32s ease both;
}

.page-narrow {
  max-width: 940px;
}

@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ------------------------------------------------------------------ */
/* Page headers                                                        */
/* ------------------------------------------------------------------ */

.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 26px;
  margin-bottom: 28px;
}

.page-head-copy {
  min-width: 0;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--brand);
  font-size: 10.5px;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-head h1 {
  margin: 7px 0 8px;
  font-size: clamp(30px, 3.6vw, 43px);
  line-height: 1.03;
  letter-spacing: -0.045em;
}

.page-sub {
  max-width: 660px;
  color: var(--muted);
  font-size: 14.5px;
}

.page-head-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 9px;
}

.date-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 254, 250, 0.65);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin: 34px 0 15px;
}

.section-head h2 {
  font-size: 21px;
}

.section-head p {
  color: var(--muted);
  font-size: 12.5px;
  margin-top: 2px;
}

.section-head-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
}

.breadcrumb a {
  color: var(--muted);
}

.breadcrumb a:hover {
  color: var(--brand);
}

.breadcrumb .icon {
  color: var(--muted-2);
}

/* ------------------------------------------------------------------ */
/* Home                                                                */
/* ------------------------------------------------------------------ */

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.9fr);
  gap: 18px;
}

.continue-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 236px;
  overflow: hidden;
  padding: 26px 28px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 88% 10%, rgba(255, 255, 255, 0.16), transparent 32%),
    linear-gradient(132deg, var(--tone, #176b54) 0%, #153c30 62%, #11241c 100%);
  box-shadow: 0 18px 40px rgba(17, 45, 34, 0.18);
  color: #fff;
}

.continue-card::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -110px;
  width: 290px;
  height: 290px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  box-shadow:
    0 0 0 36px rgba(255, 255, 255, 0.035),
    0 0 0 78px rgba(255, 255, 255, 0.02);
  pointer-events: none;
}

.continue-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.continue-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.continue-chip {
  padding: 4px 9px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.82);
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.03em;
}

.continue-percent {
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
}

.continue-body {
  position: relative;
  z-index: 1;
  margin: 22px 0 23px;
}

.continue-body h2 {
  max-width: 520px;
  margin-bottom: 7px;
  color: #fff;
  font-size: clamp(25px, 3vw, 34px);
  letter-spacing: -0.04em;
}

.continue-body p {
  max-width: 500px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 13.5px;
}

.continue-bottom {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 18px;
}

.continue-bottom .progress {
  flex: 1;
  background: rgba(255, 255, 255, 0.16);
}

.continue-bottom .progress > span {
  background: #f2c77d;
}

.continue-bottom .btn {
  flex: 0 0 auto;
  background: #fff;
  border-color: #fff;
  color: var(--brand-dark);
  box-shadow: none;
}

.continue-bottom .btn:hover {
  background: #f6f2e8;
  border-color: #f6f2e8;
  color: var(--brand-dark);
}

.review-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  padding: 24px;
  border: 1px solid #e8d5b2;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 95% 0%, rgba(231, 163, 62, 0.2), transparent 45%),
    #fffaf0;
  box-shadow: var(--shadow-xs);
}

.review-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.review-card-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: var(--amber-soft);
  color: var(--amber);
}

.review-card-count {
  color: var(--amber);
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.05em;
}

.review-card h2 {
  margin: 20px 0 5px;
  font-size: 21px;
}

.review-card p {
  color: #7d6c50;
  font-size: 13px;
}

.review-card-actions {
  margin-top: 20px;
}

.review-card-empty {
  border-color: var(--line);
  background:
    radial-gradient(circle at 95% 0%, rgba(23, 107, 84, 0.08), transparent 45%),
    var(--surface);
}

.review-card-empty .review-card-icon {
  background: var(--brand-soft);
  color: var(--brand);
}

.review-card-empty p {
  color: var(--muted);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 13px;
  margin-top: 18px;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.stat-icon {
  display: grid;
  flex: 0 0 38px;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--tone-soft, var(--brand-soft));
  color: var(--tone, var(--brand));
}

.stat-text {
  min-width: 0;
}

.stat-value {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.stat-label {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 550;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}

.subject-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 164px;
  overflow: hidden;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
  color: var(--ink);
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    border-color 0.18s ease;
}

.subject-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--tone);
}

.subject-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  color: var(--ink);
}

.subject-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.subject-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--tone-soft);
  color: var(--tone-ink);
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 750;
}

.subject-card h3 {
  margin: 18px 0 3px;
  font-size: 18px;
}

.subject-card-meta {
  color: var(--muted);
  font-size: 12px;
}

.subject-card-progress {
  margin-top: auto;
  padding-top: 18px;
}

.subject-progress-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.subject-progress-label strong {
  color: var(--tone-ink);
  font-weight: 750;
}

.subject-arrow {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--muted);
  transition:
    background 0.18s ease,
    color 0.18s ease;
}

.subject-card:hover .subject-arrow {
  background: var(--tone-soft);
  color: var(--tone-ink);
}

.tip-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
  padding: 18px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-lg);
  background: rgba(255, 254, 250, 0.38);
}

.tip-step {
  display: flex;
  gap: 11px;
}

.tip-number {
  display: grid;
  flex: 0 0 28px;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 800;
}

.tip-step strong {
  display: block;
  font-size: 13px;
  font-weight: 700;
}

.tip-step span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.recent-list {
  display: grid;
  gap: 2px;
}

.recent-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}

.recent-item:last-child {
  border-bottom: 0;
}

.recent-item:hover {
  color: var(--brand);
}

.recent-item-text {
  flex: 1;
  min-width: 0;
}

.recent-item-title {
  overflow: hidden;
  font-size: 13px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.recent-item-meta {
  color: var(--muted);
  font-size: 11.5px;
}

.recent-item-time {
  color: var(--muted-2);
  font-size: 11px;
}

/* ------------------------------------------------------------------ */
/* Subject page                                                        */
/* ------------------------------------------------------------------ */

.subject-banner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 20px;
  overflow: hidden;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 95% 10%, var(--tone-soft), transparent 42%),
    var(--surface);
  box-shadow: var(--shadow-xs);
}

.subject-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--tone);
}

.subject-banner-mark {
  display: grid;
  flex: 0 0 62px;
  place-items: center;
  width: 62px;
  height: 62px;
  border-radius: 18px;
  background: var(--tone-soft);
  color: var(--tone-ink);
  font-family: var(--font-display);
  font-size: 29px;
  font-weight: 750;
}

.subject-banner-copy {
  flex: 1;
  min-width: 0;
}

.subject-banner h1 {
  margin: 4px 0 3px;
  font-size: 30px;
  letter-spacing: -0.04em;
}

.subject-banner p {
  color: var(--muted);
  font-size: 13px;
}

.subject-banner-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  padding-left: 12px;
}

.subject-banner-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.subject-banner-stat span {
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.subject-banner-progress {
  width: 160px;
}

.subject-banner-progress .progress {
  margin-top: 8px;
}

.subject-banner-progress span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.unit-stack {
  display: grid;
  gap: 12px;
}

.unit-block {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.unit-block > summary {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 18px 21px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.unit-block > summary::-webkit-details-marker {
  display: none;
}

.unit-block[open] > summary {
  border-bottom: 1px solid var(--line);
}

.unit-icon {
  display: grid;
  flex: 0 0 36px;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--muted);
}

.unit-summary-copy {
  flex: 1;
  min-width: 0;
}

.unit-summary-copy h2 {
  font-size: 16.5px;
}

.unit-summary-copy p {
  color: var(--muted);
  font-size: 11.5px;
  margin-top: 2px;
}

.unit-summary-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.unit-summary-meta .progress {
  width: 100px;
}

.unit-summary-percent {
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
}

.unit-chevron {
  color: var(--muted-2);
  transition: transform 0.2s ease;
}

.unit-block[open] .unit-chevron {
  transform: rotate(180deg);
}

.unit-body {
  padding: 6px 21px 16px;
}

.topic-group {
  padding-top: 12px;
}

.topic-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 4px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.set-list {
  display: grid;
}

.set-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 150px 20px;
  align-items: center;
  gap: 14px;
  padding: 14px 8px;
  border-top: 1px solid var(--line);
  border-radius: 9px;
  color: var(--ink);
  transition:
    background 0.15s ease,
    padding 0.15s ease;
}

.set-row:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.set-status {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--surface-2);
  color: var(--muted);
}

.set-row.is-complete .set-status {
  background: var(--success-soft);
  color: var(--success);
}

.set-row.is-review .set-status {
  background: var(--amber-soft);
  color: var(--amber);
}

.set-row.is-progress .set-status {
  background: var(--brand-soft);
  color: var(--brand);
}

.set-copy {
  min-width: 0;
}

.set-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 650;
}

.set-desc {
  display: -webkit-box;
  overflow: hidden;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.set-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 5px;
}

.set-progress-col {
  min-width: 0;
}

.set-progress-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 600;
}

.set-progress-top strong {
  color: var(--ink-2);
}

.set-arrow {
  color: var(--muted-2);
}

.set-row:hover .set-arrow {
  color: var(--brand);
}

/* ------------------------------------------------------------------ */
/* Focus / practice                                                    */
/* ------------------------------------------------------------------ */

.focus-layout {
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -20%, rgba(23, 107, 84, 0.08), transparent 42%),
    var(--bg);
}

.focus-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 242, 235, 0.9);
  backdrop-filter: blur(14px);
}

.focus-header-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 1020px;
  margin: 0 auto;
  padding: 13px 24px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink-2);
  box-shadow: var(--shadow-xs);
}

.back-link:hover {
  border-color: var(--line-strong);
  color: var(--brand);
}

.focus-title-block {
  flex: 1;
  min-width: 0;
}

.focus-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  font-size: 14.5px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.focus-subtitle {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
}

.focus-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.focus-main {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px 24px 80px;
}

.practice-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 9px;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 600;
}

.practice-topline strong {
  color: var(--ink-2);
}

.practice-progress-wrap {
  margin-bottom: 20px;
}

.practice-progress-wrap .progress {
  height: 7px;
}

.question-card {
  position: relative;
  padding: 31px 33px 27px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  animation: question-in 0.3s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes question-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.question-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.question-index {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--brand);
  font-size: 10.5px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.question-type {
  display: flex;
  align-items: center;
  gap: 6px;
}

.question-prompt {
  margin: 17px 0 22px;
  font-size: clamp(21px, 2.7vw, 28px);
  font-weight: 650;
  line-height: 1.38;
  letter-spacing: -0.028em;
  white-space: pre-wrap;
}

.question-image {
  display: block;
  max-width: 100%;
  max-height: 390px;
  margin: 0 0 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  cursor: zoom-in;
}

.free-response-box {
  display: grid;
  gap: 8px;
}

.free-response-input {
  width: 100%;
  min-height: 170px;
  padding: 14px 16px;
  border: 1.5px solid var(--line);
  border-radius: 13px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  line-height: 1.65;
  resize: vertical;
  transition:
    border-color 0.14s ease,
    box-shadow 0.14s ease;
}

.free-response-input:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(23, 107, 84, 0.16);
}

.free-response-input:disabled {
  background: #fbfaf5;
  color: var(--ink-2);
}

.free-response-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 12px;
  color: var(--muted);
  font-size: 11.5px;
}

.free-response-note {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  color: var(--brand);
  font-size: 11.5px;
}

.feedback-missing,
.feedback-reference {
  margin-top: 12px;
  padding: 11px 13px;
  border-radius: 11px;
  color: var(--ink-2);
  font-size: 12.5px;
  line-height: 1.6;
}

.feedback-missing {
  border: 1px solid rgba(183, 121, 31, 0.3);
  background: #fffaf0;
}

.feedback-missing ul {
  margin: 5px 0 0 18px;
  padding: 0;
}

.feedback-reference {
  border: 1px solid var(--line);
  background: #fbfaf5;
}

.feedback-reference p {
  margin: 5px 0 0;
  white-space: pre-wrap;
}

.answer-options {
  display: grid;
  gap: 9px;
}

.answer-option {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 15px;
  border: 1.5px solid var(--line);
  border-radius: 13px;
  background: #fff;
  cursor: pointer;
  transition:
    border-color 0.14s ease,
    background 0.14s ease,
    box-shadow 0.14s ease;
}

.answer-option:hover {
  border-color: var(--line-strong);
  background: #fbfaf5;
}

.answer-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.option-key {
  display: grid;
  flex: 0 0 29px;
  place-items: center;
  width: 29px;
  height: 29px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  transition:
    background 0.14s ease,
    color 0.14s ease,
    border-color 0.14s ease;
}

.option-body {
  flex: 1;
  min-width: 0;
  padding-top: 2px;
}

.option-text {
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.option-media {
  display: block;
  max-width: 260px;
  max-height: 160px;
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.answer-option.is-selected {
  border-color: var(--brand);
  background: #f1f8f4;
  box-shadow: 0 0 0 3px rgba(23, 107, 84, 0.08);
}

.answer-option.is-selected .option-key {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.answer-option.is-correct {
  border-color: #4ba987;
  background: #edf8f2;
}

.answer-option.is-correct .option-key {
  border-color: var(--success);
  background: var(--success);
  color: #fff;
}

.answer-option.is-wrong {
  border-color: #d68b82;
  background: #fdf1ef;
}

.answer-option.is-wrong .option-key {
  border-color: var(--danger);
  background: var(--danger);
  color: #fff;
}

.answer-option.is-muted {
  opacity: 0.55;
}

.answer-option.is-locked {
  cursor: default;
}

.answer-option.is-locked:hover {
  border-color: inherit;
  background: inherit;
}

.answer-option.is-locked.is-selected:hover {
  background: #f1f8f4;
}

.answer-option input:focus-visible + .option-key {
  outline: 3px solid rgba(23, 107, 84, 0.35);
  outline-offset: 2px;
}

.question-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.key-hint {
  color: var(--muted-2);
  font-size: 11px;
  line-height: 1.5;
}

.key-hint kbd {
  display: inline-block;
  min-width: 19px;
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--surface);
  color: var(--muted);
  font-family: inherit;
  font-size: 10px;
  font-weight: 700;
  text-align: center;
}

.question-footer .btn {
  min-width: 150px;
}

.feedback {
  margin-top: 20px;
  padding: 16px 18px;
  border: 1px solid;
  border-radius: 14px;
  animation: feedback-in 0.25s ease both;
}

@keyframes feedback-in {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.feedback-correct {
  border-color: #b9dfce;
  background: #eef9f3;
}

.feedback-wrong {
  border-color: #efc9c3;
  background: #fdf2f0;
}

.feedback-head {
  display: flex;
  align-items: center;
  gap: 9px;
}

.feedback-head h3 {
  font-size: 15px;
}

.feedback-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

.feedback-correct .feedback-icon {
  background: var(--success);
  color: #fff;
}

.feedback-wrong .feedback-icon {
  background: var(--danger);
  color: #fff;
}

.feedback-body {
  margin-top: 9px;
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.65;
  white-space: pre-wrap;
}

.feedback-answer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
}

.answer-key-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 11.5px;
  font-weight: 650;
}

.practice-note {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 11.5px;
}

/* Cluster stimulus and grouped questions */

.cluster-stimulus {
  margin-bottom: 24px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbfaf5;
}

.cluster-label {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
  color: var(--brand);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cluster-stimulus h2 {
  margin: 3px 0 9px;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.cluster-stimulus-text {
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.cluster-stimulus-image {
  display: block;
  max-width: 100%;
  max-height: 360px;
  margin: 14px 0 0;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  cursor: zoom-in;
}

.stimulus-table-card {
  margin: 14px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
}

.stimulus-table-title {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  background: #fbfaf5;
  color: var(--ink);
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.4;
}

.stimulus-table-scroll {
  overflow-x: auto;
}

.stimulus-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  line-height: 1.45;
}

.stimulus-table th,
.stimulus-table td {
  padding: 8px 11px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  text-align: left;
  vertical-align: top;
  white-space: pre-wrap;
}

.stimulus-table th:last-child,
.stimulus-table td:last-child {
  border-right: 0;
}

.stimulus-table tbody tr:last-child th,
.stimulus-table tbody tr:last-child td {
  border-bottom: 0;
}

.stimulus-table thead th {
  background: #f1efe7;
  color: var(--ink-2);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.stimulus-table tbody th {
  background: #fbfaf5;
  font-weight: 650;
}

.stimulus-table tbody tr:nth-child(even) td {
  background: #fdfcf8;
}

.stimulus-table .align-right {
  text-align: right;
}

.stimulus-table .align-center {
  text-align: center;
}

.stimulus-table-note {
  padding: 8px 12px;
  border-top: 1px solid var(--line);
  background: #fdfcf8;
  color: var(--muted-2);
  font-size: 10.5px;
  line-height: 1.5;
}

.stimulus-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.stimulus-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.stimulus-figure img {
  display: block;
  width: 100%;
  max-height: 340px;
  background: #fff;
  object-fit: contain;
  cursor: zoom-in;
}

.stimulus-figure figcaption {
  padding: 7px 9px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.45;
}

.stimulus-image-grid.is-single .stimulus-figure img {
  max-height: 380px;
}

.cluster-source {
  margin-top: 11px;
  color: var(--muted-2);
  font-size: 10.5px;
  line-height: 1.5;
}

.cluster-questions {
  display: grid;
}

.cluster-question {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.cluster-question:first-child {
  padding-top: 2px;
  border-top: 0;
}

.cluster-question-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.cluster-question-number {
  display: grid;
  flex: 0 0 29px;
  place-items: center;
  width: 29px;
  height: 29px;
  border-radius: 8px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 11px;
  font-weight: 800;
}

.cluster-question-body {
  flex: 1;
  min-width: 0;
}

.cluster-question-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
}

.cluster-question .question-prompt {
  margin: 7px 0 14px;
  font-size: 19px;
  line-height: 1.45;
}

.cluster-question .question-image {
  max-height: 300px;
  margin-bottom: 14px;
}

.cluster-question .answer-options {
  gap: 8px;
}

.cluster-question .answer-option {
  padding: 11px 13px;
}

.cluster-question .option-text {
  font-size: 13.5px;
}

.cluster-question .feedback {
  margin-top: 15px;
}

.cluster-question .feedback-head h3 {
  font-size: 14px;
}

/* Round summary and completion */

.round-card {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  text-align: center;
  animation: question-in 0.3s ease both;
}

.round-icon {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 15px;
  border-radius: 19px;
  background: var(--brand-soft);
  color: var(--brand);
}

.round-icon.amber {
  background: var(--amber-soft);
  color: var(--amber);
}

.round-icon.success {
  background: var(--success-soft);
  color: var(--success);
}

.round-card h1 {
  margin-bottom: 7px;
  font-size: 28px;
  letter-spacing: -0.04em;
}

.round-card > p {
  max-width: 500px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 14px;
}

.round-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 560px;
  margin: 24px auto;
}

.round-stat {
  padding: 14px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
}

.round-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 750;
  letter-spacing: -0.04em;
}

.round-stat span {
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.round-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
  margin-top: 6px;
}

.round-remaining {
  max-width: 640px;
  margin: 22px auto 20px;
  text-align: left;
}

.round-remaining h2 {
  margin-bottom: 8px;
  font-size: 14px;
}

.round-remaining-list {
  display: grid;
  gap: 6px;
}

.round-remaining-item {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg);
  color: var(--ink-2);
  font-size: 12.5px;
  line-height: 1.45;
}

.round-remaining-item .icon {
  flex: 0 0 auto;
  margin-top: 1px;
  color: var(--amber);
}

.completion-card {
  position: relative;
  overflow: hidden;
  padding: 44px 34px 38px;
  border: 1px solid #c9e5d6;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 50% 0%, rgba(231, 163, 62, 0.15), transparent 42%),
    linear-gradient(180deg, #f3fbf6, #fffefa 60%);
  box-shadow: var(--shadow-md);
  text-align: center;
  animation: question-in 0.3s ease both;
}

.completion-card h1 {
  margin: 16px 0 7px;
  font-size: 32px;
}

.completion-card > p {
  max-width: 520px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 14px;
}

.trophy-wrap {
  position: relative;
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  margin: 0 auto;
  border-radius: 50%;
  background: linear-gradient(145deg, #f9e2b7, #f0c77d);
  color: #8a5a08;
  box-shadow: 0 12px 30px rgba(183, 121, 31, 0.2);
}

.confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.confetti i {
  position: absolute;
  top: -12px;
  width: 7px;
  height: 13px;
  border-radius: 2px;
  opacity: 0.8;
  animation: confetti-fall linear forwards;
}

@keyframes confetti-fall {
  to {
    transform: translateY(360px) rotate(540deg);
    opacity: 0;
  }
}

/* ------------------------------------------------------------------ */
/* Review lab                                                          */
/* ------------------------------------------------------------------ */

.review-hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  overflow: hidden;
  padding: 28px 30px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 88% 12%, rgba(231, 163, 62, 0.2), transparent 38%),
    linear-gradient(135deg, #1b3a2d, #12201a);
  color: #fff;
  box-shadow: 0 18px 40px rgba(17, 45, 34, 0.16);
}

.review-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -100px;
  width: 270px;
  height: 270px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  box-shadow: 0 0 0 40px rgba(255, 255, 255, 0.03);
}

.review-hero-copy {
  position: relative;
  z-index: 1;
  max-width: 560px;
}

.review-hero h1 {
  margin: 8px 0 7px;
  color: #fff;
  font-size: 31px;
  letter-spacing: -0.04em;
}

.review-hero p {
  color: #b5c8bd;
  font-size: 13.5px;
}

.review-hero-count {
  position: relative;
  z-index: 1;
  display: grid;
  flex: 0 0 auto;
  justify-items: center;
  min-width: 128px;
  padding: 16px 20px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.07);
}

.review-hero-count strong {
  font-family: var(--font-display);
  font-size: 46px;
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.05em;
}

.review-hero-count span {
  margin-top: 5px;
  color: #b5c8bd;
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.review-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  align-items: start;
  gap: 18px;
  margin-top: 20px;
}

.review-groups {
  display: grid;
  gap: 12px;
}

.review-set-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.review-set-head {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 18px 20px;
}

.review-set-mark {
  display: grid;
  flex: 0 0 39px;
  place-items: center;
  width: 39px;
  height: 39px;
  border-radius: 11px;
  background: var(--tone-soft);
  color: var(--tone-ink);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 750;
}

.review-set-copy {
  flex: 1;
  min-width: 0;
}

.review-set-copy h3 {
  font-size: 16px;
}

.review-set-copy p {
  color: var(--muted);
  font-size: 11.5px;
  margin-top: 2px;
}

.review-set-actions {
  display: flex;
  align-items: center;
  gap: 9px;
}

.review-question-list {
  border-top: 1px solid var(--line);
  background: #fdfcf8;
}

.review-question {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.45;
}

.review-question:last-child {
  border-bottom: 0;
}

.review-question-number {
  flex: 0 0 auto;
  color: var(--muted-2);
  font-size: 10.5px;
  font-weight: 700;
  padding-top: 1px;
}

.review-question-text {
  display: -webkit-box;
  overflow: hidden;
  color: var(--ink-2);
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.review-question-more {
  padding: 9px 20px;
  color: var(--muted);
  font-size: 11.5px;
  background: #fdfcf8;
}

.review-aside {
  display: grid;
  gap: 12px;
  position: sticky;
  top: 20px;
}

.review-tip {
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.review-tip h3 {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
}

.review-tip p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.mastery-steps {
  display: grid;
  gap: 9px;
  margin-top: 12px;
}

.mastery-step {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: 12px;
  color: var(--ink-2);
}

.mastery-step .step-dot {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 21px;
  height: 21px;
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
}

/* ------------------------------------------------------------------ */
/* Progress page                                                       */
/* ------------------------------------------------------------------ */

.progress-overview {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 13px;
}

.progress-subject {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.progress-subject-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 17px 20px;
  border-bottom: 1px solid var(--line);
}

.progress-subject-mark {
  display: grid;
  flex: 0 0 38px;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--tone-soft);
  color: var(--tone-ink);
  font-family: var(--font-display);
  font-weight: 750;
}

.progress-subject-copy {
  flex: 1;
  min-width: 0;
}

.progress-subject-copy h2 {
  font-size: 16px;
}

.progress-subject-copy p {
  color: var(--muted);
  font-size: 11.5px;
}

.progress-subject-bar {
  width: 150px;
}

.progress-subject-bar span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 650;
  text-align: right;
}

.progress-set-list {
  display: grid;
}

.progress-set-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px 90px;
  align-items: center;
  gap: 18px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--line);
}

.progress-set-row:last-child {
  border-bottom: 0;
}

.progress-set-row:hover {
  background: #fdfcf8;
}

.progress-set-title {
  font-size: 13.5px;
  font-weight: 650;
}

.progress-set-meta {
  color: var(--muted);
  font-size: 11px;
  margin-top: 2px;
}

.progress-set-status {
  text-align: right;
}

/* ------------------------------------------------------------------ */
/* Teacher                                                             */
/* ------------------------------------------------------------------ */

.teacher-hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  overflow: hidden;
  padding: 30px 32px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 88% 0%, rgba(231, 163, 62, 0.18), transparent 36%),
    radial-gradient(circle at 10% 100%, rgba(43, 127, 122, 0.22), transparent 40%),
    var(--sidebar);
  box-shadow: 0 18px 40px rgba(17, 45, 34, 0.18);
  color: #fff;
}

.teacher-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -130px;
  width: 340px;
  height: 340px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  box-shadow: 0 0 0 44px rgba(255, 255, 255, 0.025);
}

.teacher-hero .eyebrow {
  color: #e7a33e;
}

.teacher-hero h1 {
  margin: 7px 0 8px;
  color: #fff;
  font-size: clamp(30px, 3.6vw, 42px);
}

.teacher-hero p {
  max-width: 620px;
  color: #b5c8bd;
  font-size: 13.5px;
}

.teacher-hero-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.teacher-hero-actions .btn-secondary {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.09);
  color: #fff;
  box-shadow: none;
}

.teacher-hero-actions .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.28);
  color: #fff;
}

.admin-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 13px;
  margin-top: 18px;
}

.admin-stat {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.admin-stat-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.admin-stat-icon {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  border-radius: 9px;
  background: var(--tone-soft, var(--brand-soft));
  color: var(--tone, var(--brand));
}

.admin-stat-value {
  margin-top: 14px;
  font-family: var(--font-display);
  font-size: 31px;
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.045em;
}

.admin-stat-foot {
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
}

.admin-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: start;
  gap: 16px;
  margin-top: 16px;
}

.admin-two-col.even {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bar-list {
  display: grid;
  gap: 15px;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(90px, 140px) minmax(0, 1fr) 42px;
  align-items: center;
  gap: 12px;
}

.bar-label {
  overflow: hidden;
  font-size: 12.5px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bar-track {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-3);
}

.bar-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--tone, var(--brand));
}

.bar-value {
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
  text-align: right;
}

.attention-list {
  display: grid;
  gap: 3px;
}

.attention-item {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 11px 2px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}

.attention-item:last-child {
  border-bottom: 0;
}

.attention-item:hover {
  color: var(--brand);
}

.attention-main {
  flex: 1;
  min-width: 0;
}

.attention-prompt {
  display: -webkit-box;
  overflow: hidden;
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.attention-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 4px;
  color: var(--muted);
  font-size: 10.5px;
}

.attention-accuracy {
  flex: 0 0 auto;
  padding: 3px 7px;
  border-radius: 6px;
  font-size: 10.5px;
  font-weight: 750;
}

.attention-accuracy.danger {
  background: var(--danger-soft);
  color: var(--danger);
}

.attention-accuracy.warning {
  background: var(--amber-soft);
  color: #7c4f0e;
}

.attention-accuracy.success {
  background: var(--success-soft);
  color: var(--success);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}

.data-table th {
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  background: #fbfaf4;
  color: var(--muted);
  font-size: 9.5px;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-align: left;
  text-transform: uppercase;
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr.is-clickable {
  cursor: pointer;
}

.data-table tbody tr.is-clickable:hover {
  background: #fbfaf4;
}

.data-table .num {
  text-align: right;
  white-space: nowrap;
}

.student-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 180px;
}

.student-cell-copy {
  min-width: 0;
}

.student-name {
  font-weight: 650;
  color: var(--ink);
  white-space: nowrap;
}

.student-email {
  overflow: hidden;
  max-width: 230px;
  color: var(--muted);
  font-size: 10.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.accuracy-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 90px;
}

.accuracy-cell .bar-track {
  width: 54px;
  height: 5px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  white-space: nowrap;
}

.status-pill.success {
  background: var(--success-soft);
  color: var(--success);
}

.status-pill.warning {
  background: var(--amber-soft);
  color: #7c4f0e;
}

.status-pill.danger {
  background: var(--danger-soft);
  color: var(--danger);
}

.status-pill.neutral {
  background: var(--surface-2);
  color: var(--muted);
}

.status-pill.info {
  background: var(--info-soft);
  color: var(--info);
}

.student-profile {
  display: flex;
  align-items: center;
  gap: 17px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.student-profile h1 {
  font-size: 28px;
  letter-spacing: -0.04em;
}

.student-profile p {
  color: var(--muted);
  font-size: 12.5px;
}

.student-profile-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-left: auto;
}

.student-profile-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.student-profile-stat span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-bottom: 15px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.filter-bar .input,
.filter-bar .select {
  min-height: 38px;
  font-size: 12.5px;
}

.filter-bar .input {
  max-width: 260px;
}

.filter-bar .select {
  width: auto;
  min-width: 140px;
}

.filter-spacer {
  flex: 1;
}

.check-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 550;
  white-space: nowrap;
  cursor: pointer;
}

.check-label input {
  accent-color: var(--brand);
}

.insight-list {
  display: grid;
  gap: 9px;
}

.question-insight {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.question-insight > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 150px 100px 20px;
  align-items: center;
  gap: 16px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
}

.question-insight > summary::-webkit-details-marker {
  display: none;
}

.question-insight[open] > summary {
  border-bottom: 1px solid var(--line);
  background: #fbfaf4;
}

.qi-main {
  min-width: 0;
}

.qi-prompt {
  display: -webkit-box;
  overflow: hidden;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.qi-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 4px;
  color: var(--muted);
  font-size: 10.5px;
}

.qi-accuracy {
  display: flex;
  align-items: center;
  gap: 7px;
}

.qi-accuracy .bar-track {
  flex: 1;
  height: 5px;
}

.qi-accuracy-value {
  width: 33px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  text-align: right;
}

.qi-count {
  color: var(--muted);
  font-size: 10.5px;
  text-align: right;
  white-space: nowrap;
}

.qi-chevron {
  color: var(--muted-2);
  transition: transform 0.2s ease;
}

.question-insight[open] .qi-chevron {
  transform: rotate(180deg);
}

.qi-body {
  padding: 16px;
}

.qi-answer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 13px;
}

.option-dist-list {
  display: grid;
  gap: 8px;
}

.option-dist-row {
  display: grid;
  grid-template-columns: minmax(150px, 220px) minmax(0, 1fr) 64px;
  align-items: center;
  gap: 12px;
  font-size: 12px;
}

.option-dist-label {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
}

.option-dist-key {
  display: grid;
  flex: 0 0 21px;
  place-items: center;
  width: 21px;
  height: 21px;
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 9.5px;
  font-weight: 750;
}

.option-dist-row.is-correct .option-dist-key {
  background: var(--success);
  color: #fff;
}

.option-dist-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dist-track {
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-3);
}

.dist-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--line-strong);
}

.option-dist-row.is-correct .dist-fill {
  background: var(--success);
}

.option-dist-count {
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 650;
  text-align: right;
  white-space: nowrap;
}

.qi-explanation {
  margin-top: 14px;
  padding: 11px 13px;
  border-left: 3px solid var(--brand);
  border-radius: 0 8px 8px 0;
  background: var(--bg);
  color: var(--ink-2);
  font-size: 12px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.qi-image-note {
  margin-top: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--amber-soft);
  color: #7c4f0e;
  font-size: 11.5px;
}

.set-detail-list {
  display: grid;
  gap: 10px;
}

.set-detail-question {
  padding: 17px 19px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface);
}

.set-detail-q-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.set-detail-q-num {
  display: grid;
  flex: 0 0 25px;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 750;
}

.set-detail-q-prompt {
  flex: 1;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.5;
  white-space: pre-wrap;
}

.set-detail-options {
  display: grid;
  gap: 6px;
  margin: 12px 0 0 35px;
}

.set-detail-option {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fdfcf8;
  font-size: 12px;
}

.set-detail-option.is-correct {
  border-color: #b9dfce;
  background: #eef9f3;
}

.set-detail-option-key {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 10px;
  font-weight: 750;
}

.set-detail-option.is-correct .set-detail-option-key {
  color: var(--success);
}

.set-detail-explanation {
  margin: 11px 0 0 35px;
  padding: 9px 11px;
  border-radius: 8px;
  background: var(--bg);
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.6;
  white-space: pre-wrap;
}

/* Import */

.import-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  align-items: start;
  gap: 17px;
}

.import-main {
  display: grid;
  gap: 14px;
}

.dropzone {
  display: grid;
  justify-items: center;
  gap: 7px;
  padding: 36px 24px;
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--radius-lg);
  background: #fdfcf8;
  text-align: center;
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    background 0.15s ease;
}

.dropzone:hover,
.dropzone.is-dragover {
  border-color: var(--brand);
  background: #f2f9f5;
}

.dropzone-icon {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  margin-bottom: 4px;
  border-radius: 14px;
  background: var(--brand-soft);
  color: var(--brand);
}

.dropzone strong {
  font-size: 14px;
}

.dropzone span {
  color: var(--muted);
  font-size: 12px;
}

.dropzone small {
  color: var(--muted-2);
  font-size: 10.5px;
}

.import-file {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
  font-size: 12px;
}

.import-file-copy {
  flex: 1;
  min-width: 0;
}

.import-file-name {
  overflow: hidden;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.import-file-meta {
  color: var(--muted);
  font-size: 10.5px;
}

.import-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted-2);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.import-divider::before,
.import-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.import-options {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 12px;
}

.import-options .field {
  min-width: 190px;
}

.alert {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 12px 14px;
  border: 1px solid;
  border-radius: 11px;
  font-size: 12.5px;
  line-height: 1.55;
}

.alert .icon {
  flex: 0 0 auto;
  margin-top: 1px;
}

.alert-danger {
  border-color: #efc9c3;
  background: var(--danger-soft);
  color: #8f3229;
}

.alert-warning {
  border-color: #e8d5b2;
  background: #fff8eb;
  color: #7c4f0e;
}

.alert-success {
  border-color: #b9dfce;
  background: #eef9f3;
  color: #125c44;
}

.alert-info {
  border-color: #c9d9ec;
  background: var(--info-soft);
  color: #28527f;
}

.alert-list {
  margin: 6px 0 0;
  padding-left: 18px;
}

.alert-list li {
  margin: 2px 0;
}

.import-preview {
  display: grid;
  gap: 12px;
}

.preview-set {
  padding: 15px 17px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.preview-set-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.preview-set h3 {
  font-size: 14.5px;
}

.preview-set p {
  color: var(--muted);
  font-size: 11.5px;
  margin-top: 2px;
}

.preview-set-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 8px;
}

.preview-questions {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 5px;
}

.preview-questions li {
  display: flex;
  gap: 7px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.45;
}

.preview-questions strong {
  color: var(--muted-2);
  font-size: 10px;
}

.import-result {
  display: grid;
  gap: 8px;
}

.result-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
}

.result-row .icon {
  flex: 0 0 auto;
  margin-top: 2px;
}

.import-help {
  display: grid;
  gap: 13px;
}

.help-step {
  display: flex;
  gap: 11px;
}

.help-step-num {
  display: grid;
  flex: 0 0 27px;
  place-items: center;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 11px;
  font-weight: 800;
}

.help-step strong {
  display: block;
  font-size: 12.5px;
}

.help-step p {
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.55;
}

.download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.code-sample {
  margin: 0;
  padding: 12px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8f7f1;
  color: var(--ink-2);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
  line-height: 1.55;
}

/* ------------------------------------------------------------------ */
/* Assignments                                                         */
/* ------------------------------------------------------------------ */

.segmented {
  display: inline-flex;
  gap: 3px;
  margin: 18px 0;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
}

.segmented-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 650;
  cursor: pointer;
}

.segmented-btn:hover {
  color: var(--ink);
}

.segmented-btn.is-active {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-xs);
}

.assignment-layout {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  align-items: start;
  gap: 16px;
}

.assignment-sidebar {
  position: sticky;
  top: 20px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 40px);
  padding: 16px;
}

.assignment-sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.assignment-sidebar-head h2 {
  font-size: 16px;
}

.assignment-list {
  display: grid;
  flex: 1;
  min-height: 0;
  gap: 3px;
  overflow-y: auto;
  margin: 0 -4px;
  padding: 0 4px;
}

.assignment-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 8px 9px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.assignment-item:hover {
  background: var(--surface-2);
}

.assignment-item.is-active {
  border-color: #c9e3d7;
  background: var(--brand-soft);
}

.assignment-item-copy {
  display: grid;
  flex: 1;
  min-width: 0;
  gap: 1px;
}

.assignment-item-name {
  overflow: hidden;
  font-size: 12.5px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.assignment-item-meta {
  overflow: hidden;
  color: var(--muted);
  font-size: 10.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.assignment-count {
  display: grid;
  flex: 0 0 auto;
  min-width: 23px;
  height: 23px;
  padding: 0 5px;
  place-items: center;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 10px;
  font-weight: 750;
}

.assignment-item.is-active .assignment-count {
  background: #fff;
  color: var(--brand);
}

.assignment-set-dot {
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tone, var(--brand));
}

.assignment-editor {
  min-height: 520px;
  padding: 22px;
}

.assignment-editor-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.assignment-editor-head h2 {
  margin-top: 2px;
  font-size: 20px;
  letter-spacing: -0.035em;
}

.assignment-editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.assignment-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin: 13px 0;
  font-size: 11.5px;
}

.assignment-set-search {
  margin-bottom: 12px;
}

.assignment-set-groups {
  display: grid;
  gap: 14px;
  max-height: 48vh;
  overflow-y: auto;
  padding-right: 4px;
}

.assignment-subject h3 {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.assignment-row {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-bottom: 4px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  cursor: pointer;
  transition:
    background 0.14s ease,
    border-color 0.14s ease;
}

.assignment-row:hover {
  border-color: var(--line-strong);
  background: #fbfaf5;
}

.assignment-row input {
  flex: 0 0 auto;
  margin-top: 3px;
  accent-color: var(--brand);
}

.assignment-row-copy {
  display: grid;
  flex: 1;
  min-width: 0;
  gap: 1px;
}

.assignment-row-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 650;
}

.assignment-row-meta {
  color: var(--muted);
  font-size: 10.5px;
}

.assignment-student-list {
  display: grid;
  gap: 4px;
  max-height: 48vh;
  overflow-y: auto;
  padding-right: 4px;
}

.assignment-save-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 15px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.assignment-save-row .muted {
  font-size: 11.5px;
}

.assignment-empty {
  display: grid;
  justify-items: center;
  gap: 7px;
  padding: 48px 20px;
  color: var(--muted);
  text-align: center;
}

.assignment-empty h3 {
  color: var(--ink);
  font-size: 17px;
}

.assignment-empty p {
  max-width: 290px;
  font-size: 12.5px;
}

.dialog-form {
  display: grid;
  gap: 14px;
}

.dialog-sub {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.dialog-hint {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.dialog-form .dialog-actions {
  margin-top: 2px;
}

.form-error {
  padding: 9px 11px;
  border: 1px solid #efc9c3;
  border-radius: 9px;
  background: var(--danger-soft);
  color: #8f3229;
  font-size: 12px;
}

/* ------------------------------------------------------------------ */
/* Toasts & dialogs                                                    */
/* ------------------------------------------------------------------ */

.toast-host {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 1000;
  display: grid;
  gap: 8px;
  max-width: min(360px, calc(100vw - 32px));
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 11px 13px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  background: #1c2c24;
  color: #fff;
  font-size: 12.5px;
  line-height: 1.5;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.22s ease,
    transform 0.22s ease;
  pointer-events: auto;
}

.toast.is-visible {
  opacity: 1;
  transform: none;
}

.toast .icon {
  flex: 0 0 auto;
  margin-top: 1px;
  color: #9fd4be;
}

.toast-success {
  background: #12523d;
}

.toast-error {
  background: #7c2e27;
}

.toast-error .icon {
  color: #f3c7c1;
}

.app-dialog {
  width: min(460px, calc(100vw - 32px));
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-lg);
}

.app-dialog::backdrop {
  background: rgba(15, 25, 19, 0.48);
  backdrop-filter: blur(3px);
}

.dialog-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.dialog-head h2 {
  font-size: 20px;
}

.dialog-message {
  margin: 10px 0 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.image-dialog {
  width: auto;
  max-width: min(94vw, 1100px);
  padding: 10px;
  background: #101713;
  border-color: #26382f;
}

.image-dialog img {
  display: block;
  max-width: 100%;
  max-height: 86vh;
  border-radius: 10px;
}

.image-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 1;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.image-close:hover {
  background: #fff;
}

/* ------------------------------------------------------------------ */
/* Legal pages                                                         */
/* ------------------------------------------------------------------ */

.legal-page {
  min-height: 100vh;
  padding: 28px 20px 60px;
  background:
    radial-gradient(circle at 85% 0%, rgba(23, 107, 84, 0.07), transparent 32%),
    var(--bg);
}

.legal-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 900px;
  margin: 0 auto 22px;
}

.legal-top .brand {
  font-size: 18px;
}

.legal-top .brand img {
  border-radius: 10px;
}

.legal-top nav a {
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 650;
}

.legal-top nav a:hover {
  color: var(--brand);
}

.legal-card {
  max-width: 900px;
  margin: 0 auto;
  padding: 44px 48px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.legal-card h1 {
  margin-bottom: 4px;
  font-size: 38px;
  letter-spacing: -0.045em;
}

.legal-meta {
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 12px;
}

.legal-card h2 {
  margin: 30px 0 7px;
  font-size: 19px;
}

.legal-card p,
.legal-card li {
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.75;
}

.legal-card p {
  margin: 8px 0;
}

.legal-card ul {
  margin: 8px 0 8px 20px;
  padding: 0;
}

.legal-card li {
  margin: 5px 0;
}

.legal-card .legal-note {
  margin-top: 30px;
  padding: 14px 16px;
  border-left: 3px solid var(--brand);
  border-radius: 0 10px 10px 0;
  background: var(--bg);
  color: var(--muted);
  font-size: 12.5px;
}

.legal-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 900px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 11.5px;
}

.legal-bottom a {
  color: var(--muted);
}

.legal-bottom a:hover {
  color: var(--brand);
}

.login-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 11px;
}

.login-legal a {
  color: var(--muted);
}

.login-legal a:hover {
  color: var(--brand);
}

.sidebar-legal {
  display: flex;
  gap: 12px;
  padding: 9px 8px 2px;
  color: #71897b;
  font-size: 10px;
}

.sidebar-legal a {
  color: #71897b;
}

.sidebar-legal a:hover {
  color: #fff;
}

/* ------------------------------------------------------------------ */
/* Responsive                                                          */
/* ------------------------------------------------------------------ */

@media (max-width: 1120px) {
  .subject-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(250px, 0.8fr);
  }

  .review-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
  }

  .progress-set-row {
    grid-template-columns: minmax(0, 1fr) 170px 82px;
  }
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: min(290px, 88vw);
    transform: translateX(-105%);
    transition: transform 0.24s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: var(--shadow-lg);
  }

  body.nav-open .sidebar {
    transform: none;
  }

  .sidebar-close {
    display: inline-grid;
  }

  .sidebar-scrim {
    position: fixed;
    inset: 0;
    z-index: 35;
    display: block;
    border: 0;
    background: rgba(15, 25, 19, 0.46);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
  }

  body.nav-open .sidebar-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-bar {
    display: flex;
  }

  .mobile-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 32;
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    height: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom));
    padding: 6px 8px env(safe-area-inset-bottom);
    border-top: 1px solid var(--line);
    background: rgba(255, 254, 250, 0.94);
    backdrop-filter: blur(16px);
  }

  .mobile-nav-link {
    display: flex;
    flex: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    max-width: 100px;
    border-radius: 10px;
    color: var(--muted);
    font-size: 9.5px;
    font-weight: 650;
    letter-spacing: 0.01em;
  }

  .mobile-nav-link .icon {
    color: var(--muted);
  }

  .mobile-nav-link.is-active {
    color: var(--brand);
  }

  .mobile-nav-link.is-active .icon {
    color: var(--brand);
  }

  .mobile-nav-icon-wrap {
    position: relative;
    display: grid;
    place-items: center;
  }

  .mobile-dot {
    position: absolute;
    top: -6px;
    right: -12px;
    display: grid;
    min-width: 15px;
    height: 15px;
    padding: 0 4px;
    place-items: center;
    border-radius: 999px;
    background: var(--amber-2);
    color: #241806;
    font-size: 8px;
    font-weight: 800;
    line-height: 1;
  }

  .page {
    padding: 26px 20px calc(90px + env(safe-area-inset-bottom));
  }

  .page-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 15px;
  }

  .page-head-actions {
    justify-content: flex-start;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .stat-grid,
  .progress-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admin-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .review-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .review-aside {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admin-two-col,
  .admin-two-col.even,
  .import-grid,
  .assignment-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .assignment-sidebar {
    position: static;
    max-height: none;
  }

  .assignment-editor {
    min-height: 0;
  }

  .assignment-set-groups,
  .assignment-student-list {
    max-height: none;
  }

  .teacher-hero {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .subject-banner {
    flex-wrap: wrap;
  }

  .subject-banner-stats {
    width: 100%;
    padding-left: 0;
  }

  .subject-banner-progress {
    width: 100%;
  }

  .login-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .login-brand-panel {
    display: none;
  }

  .login-mobile-brand {
    display: inline-flex;
  }

  .focus-main {
    padding: 18px 15px 70px;
  }

  .focus-header-inner {
    padding: 11px 15px;
  }

  .question-insight > summary {
    grid-template-columns: minmax(0, 1fr) 110px 20px;
  }

  .qi-count {
    display: none;
  }
}

@media (max-width: 700px) {
  .page-head h1 {
    font-size: 32px;
  }

  .continue-card {
    min-height: 220px;
    padding: 22px;
  }

  .continue-bottom {
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
  }

  .continue-bottom .btn {
    width: 100%;
  }

  .subject-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .tip-strip {
    grid-template-columns: minmax(0, 1fr);
  }

  .stat-grid,
  .progress-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat-card {
    padding: 13px;
  }

  .stat-value {
    font-size: 21px;
  }

  .stat-icon {
    flex-basis: 34px;
    width: 34px;
    height: 34px;
  }

  .subject-banner {
    padding: 20px;
  }

  .subject-banner-mark {
    flex-basis: 50px;
    width: 50px;
    height: 50px;
    font-size: 23px;
  }

  .subject-banner h1 {
    font-size: 25px;
  }

  .unit-block > summary {
    padding: 15px;
  }

  .unit-summary-meta .progress {
    display: none;
  }

  .unit-body {
    padding: 4px 14px 12px;
  }

  .set-row {
    grid-template-columns: 36px minmax(0, 1fr) 18px;
    gap: 10px;
  }

  .set-progress-col {
    grid-column: 2 / -1;
    padding-top: 2px;
  }

  .set-status {
    width: 34px;
    height: 34px;
  }

  .set-arrow {
    grid-column: 3;
    grid-row: 1;
  }

  .question-card {
    padding: 22px 18px 20px;
    border-radius: 20px;
  }

  .cluster-stimulus {
    padding: 14px 15px;
  }

  .cluster-stimulus h2 {
    font-size: 16px;
  }

  .cluster-question-head {
    gap: 8px;
  }

  .cluster-question-number {
    flex-basis: 25px;
    width: 25px;
    height: 25px;
    font-size: 10px;
  }

  .cluster-question .question-prompt {
    font-size: 17px;
  }

  .stimulus-image-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .stimulus-table th,
  .stimulus-table td {
    padding: 6px 8px;
    font-size: 11.5px;
  }

  .question-prompt {
    margin: 14px 0 18px;
  }

  .answer-option {
    padding: 12px 13px;
  }

  .question-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .question-footer .btn {
    width: 100%;
  }

  .key-hint {
    display: none;
  }

  .round-card,
  .completion-card {
    padding: 26px 19px;
  }

  .round-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .review-hero {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
    padding: 22px;
  }

  .review-hero-count {
    width: 100%;
  }

  .review-aside {
    grid-template-columns: minmax(0, 1fr);
  }

  .review-set-head {
    flex-wrap: wrap;
  }

  .review-set-actions {
    width: 100%;
    padding-left: 52px;
  }

  .progress-set-row {
    grid-template-columns: minmax(0, 1fr) 110px;
    gap: 10px;
    padding: 12px 15px;
  }

  .progress-set-status {
    display: none;
  }

  .progress-subject-head {
    flex-wrap: wrap;
  }

  .progress-subject-bar {
    width: 100%;
    padding-left: 50px;
  }

  .teacher-hero {
    padding: 23px 21px;
  }

  .admin-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admin-stat-value {
    font-size: 27px;
  }

  .segmented {
    display: flex;
    width: 100%;
  }

  .segmented-btn {
    flex: 1;
    justify-content: center;
  }

  .assignment-editor {
    padding: 16px;
  }

  .assignment-editor-head {
    flex-direction: column;
  }

  .assignment-save-row {
    align-items: stretch;
    flex-direction: column;
  }

  .student-profile {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .student-profile-stats {
    width: 100%;
    margin-left: 0;
  }

  .filter-bar {
    align-items: stretch;
  }

  .filter-bar .input,
  .filter-bar .select {
    max-width: none;
    width: 100%;
  }

  .filter-bar .select {
    flex: 1;
  }

  .question-insight > summary {
    grid-template-columns: minmax(0, 1fr) 20px;
    gap: 10px;
  }

  .qi-accuracy {
    grid-column: 1 / -1;
    padding-top: 4px;
  }

  .qi-chevron {
    grid-column: 2;
    grid-row: 1;
  }

  .option-dist-row {
    grid-template-columns: minmax(120px, 1fr) 60px;
  }

  .option-dist-row .dist-track {
    display: none;
  }

  .set-detail-options,
  .set-detail-explanation {
    margin-left: 0;
  }

  .bar-row {
    grid-template-columns: minmax(80px, 110px) minmax(0, 1fr) 40px;
    gap: 8px;
  }

  .import-options {
    flex-direction: column;
    align-items: stretch;
  }

  .import-options .field {
    min-width: 0;
  }

  .toast-host {
    right: 12px;
    bottom: calc(var(--mobile-nav-height) + 12px + env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* AI upload assistant */
.ai-import-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 18px;
  align-items: start;
}

.ai-import-main {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.input-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.input-row .input {
  flex: 1;
}

.inline-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.ai-chat {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 420px;
  overflow-y: auto;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfaf5;
}

.ai-chat-empty {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 24px 16px;
  color: var(--muted);
  text-align: center;
  font-size: 12.5px;
  line-height: 1.6;
}

.ai-chat-empty p {
  max-width: 440px;
  margin: 0;
}

.ai-chat-message {
  display: grid;
  gap: 4px;
  max-width: 90%;
}

.ai-chat-message.user {
  align-self: flex-end;
}

.ai-chat-role {
  color: var(--muted);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-chat-message.user .ai-chat-role {
  text-align: right;
}

.ai-chat-bubble {
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.ai-chat-message.user .ai-chat-bubble {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.ai-chat-compose {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  margin-top: 12px;
}

.ai-chat-compose .textarea {
  flex: 1;
  min-height: 70px;
}

.ai-generating {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px;
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  background: #fbfaf5;
}

.ai-generating p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11.5px;
}

.ai-generate-summary {
  display: grid;
  gap: 12px;
}

.ai-generate-head {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.ai-generate-head p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11.5px;
}

.ai-set-list {
  display: grid;
  gap: 8px;
}

.ai-set-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.ai-set-row span {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 11.5px;
}

.ai-set-meta {
  color: var(--muted);
  font-size: 11.5px;
  text-align: right;
}

.ai-generate-actions {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.ai-generate-actions .field {
  min-width: 220px;
}

@media (max-width: 1000px) {
  .ai-import-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .ai-chat-compose {
    flex-direction: column;
    align-items: stretch;
  }

  .ai-set-row {
    flex-direction: column;
  }

  .ai-set-meta {
    text-align: left;
  }
}

/* AI upload question review and page-image cropper */
.ai-set-block {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfaf5;
}

.ai-question-list {
  display: grid;
  gap: 6px;
  max-height: 360px;
  overflow: auto;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.ai-question-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
}

.ai-question-main {
  display: flex;
  flex: 1;
  gap: 8px;
  align-items: flex-start;
  min-width: 0;
}

.ai-question-num {
  display: grid;
  flex: 0 0 24px;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: #eef3ef;
  color: var(--brand);
  font-size: 11px;
  font-weight: 750;
}

.ai-question-main strong {
  display: block;
  color: var(--ink);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.4;
}

.ai-question-main span {
  color: var(--muted);
  font-size: 10.5px;
}

.ai-question-images {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ai-question-thumb {
  position: relative;
  width: 54px;
  height: 40px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.ai-question-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ai-question-thumb button {
  position: absolute;
  top: -5px;
  right: -5px;
  display: grid;
  place-items: center;
  width: 17px;
  height: 17px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
}

.ai-crop-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(18, 32, 26, 0.62);
}

.ai-crop-dialog {
  width: min(880px, 100%);
  max-height: 92vh;
  overflow: auto;
  padding: 18px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
}

.ai-crop-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.ai-crop-head h2 {
  margin: 0 0 3px;
  font-size: 18px;
}

.ai-crop-head p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.ai-crop-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-end;
  margin: 12px 0;
}

.ai-crop-toolbar .field {
  min-width: 260px;
}

.ai-crop-stage {
  max-height: 62vh;
  overflow: auto;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f3f1ea;
  text-align: center;
}

.ai-crop-frame {
  position: relative;
  display: inline-block;
  max-width: 100%;
}

.ai-crop-frame img {
  display: block;
  max-width: 100%;
  height: auto;
  cursor: crosshair;
  user-select: none;
  touch-action: none;
}

.ai-crop-selection {
  position: absolute;
  box-sizing: border-box;
  border: 2px dashed var(--brand);
  background: rgba(23, 107, 84, 0.12);
  pointer-events: none;
}

.ai-crop-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 12px;
}

@media (max-width: 640px) {
  .ai-question-row {
    flex-wrap: wrap;
  }

  .ai-question-main {
    flex-basis: 100%;
  }
}

/* Set detail question editing */
.set-detail-q-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 10px;
}

.question-edit-dialog {
  width: min(860px, calc(100vw - 32px));
  max-height: 90vh;
  overflow: auto;
}

.question-edit-body {
  display: grid;
  gap: 14px;
  margin: 14px 0;
}

.dialog-sub {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11.5px;
}

.question-edit-options {
  display: grid;
  gap: 6px;
}

.question-edit-option-head,
.question-edit-option {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) minmax(0, 1fr) 92px;
  gap: 8px;
  align-items: center;
}

.question-edit-option-head {
  padding: 0 4px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.question-edit-option {
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fbfaf5;
}

.question-edit-correct {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
}

.question-edit-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(160px, 1fr);
  gap: 12px;
}

.question-edit-actions {
  margin-top: 12px;
}

.question-edit-error:empty {
  display: none;
}

.question-edit-error {
  margin-top: 10px;
}

@media (max-width: 700px) {
  .question-edit-option-head {
    display: none;
  }

  .question-edit-option {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  .question-edit-option .question-edit-correct {
    grid-column: 2;
  }

  .question-edit-grid {
    grid-template-columns: 1fr;
  }
}

/* Practice multi-question page view */
.practice-page-size {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 11.5px;
  white-space: nowrap;
}

.practice-page-size .select {
  width: auto;
  min-width: 64px;
  min-height: 30px;
  padding: 5px 24px 5px 8px;
  font-size: 12px;
}

.batch-page {
  display: grid;
  gap: 18px;
}

.batch-page-intro {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.batch-question-card {
  margin: 0;
}

.batch-question-card .question-prompt {
  margin: 14px 0 16px;
  font-size: clamp(18px, 2.1vw, 23px);
}

.batch-page-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 0 2px;
}

.batch-page-note {
  max-width: 620px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .focus-header-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .practice-page-size {
    order: -1;
  }
}

/* Bulk assignment by unit or subject */
.assignment-bulk {
  margin: 12px 0 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfaf5;
}

.assignment-bulk-head h3 {
  margin: 0 0 3px;
  font-size: 14px;
}

.assignment-bulk-head p {
  margin: 0;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.5;
}

.assignment-bulk-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-end;
  margin-top: 10px;
}

.assignment-bulk-row .field {
  flex: 1;
  min-width: 240px;
}

.assignment-bulk-summary {
  margin-top: 8px;
  font-size: 11.5px;
}

.ai-source-files {
  display: grid;
  gap: 8px;
}

/* Import batch history */
.import-history-list {
  display: grid;
  gap: 8px;
}

.import-history-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fbfaf5;
}

.import-history-main {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.import-history-main strong {
  font-size: 13px;
}

.import-history-main > span {
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.5;
}

.import-history-sets {
  margin-top: 4px;
  font-size: 11.5px;
}

.import-history-sets summary {
  cursor: pointer;
  color: var(--brand);
}

.import-history-sets ul {
  display: grid;
  gap: 4px;
  margin: 6px 0 0 18px;
  padding: 0;
}

.import-history-sets li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--ink-2);
}

.import-history-empty {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .import-history-row {
    flex-direction: column;
  }
}