/* GCSE Perfect — Design System v2
   Focus-first dark theme. White question card on dark chrome.
   ─────────────────────────────────────────────────────────── */

/* ── Design tokens ──────────────────────────────────────── */
:root {
  --bg:           #0c0e16;
  --surface:      #161928;
  --surface-hi:   #1e2235;
  --surface-top:  #252942;
  --border:       #2a2f47;
  --border-soft:  #1d2038;

  --accent:       #6366f1;
  --accent-hi:    #818cf8;
  --accent-soft:  rgba(99, 102, 241, 0.12);
  --accent-glow:  rgba(99, 102, 241, 0.20);

  --success:      #10b981;
  --success-soft: rgba(16, 185, 129, 0.12);
  --success-dim:  #065f46;

  --warning:      #f59e0b;
  --warning-soft: rgba(245, 158, 11, 0.14);

  --danger:       #ef4444;
  --danger-soft:  rgba(239, 68, 68, 0.12);

  --text-1:       #f1f5f9;
  --text-2:       #94a3b8;
  --text-3:       #475569;

  --radius-sm:    6px;
  --radius:       10px;
  --radius-lg:    14px;
  --radius-xl:    20px;

  --shadow-sm:    0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow:       0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-card:  0 8px 48px rgba(0, 0, 0, 0.60);
  --shadow-lift:  0 16px 64px rgba(0, 0, 0, 0.70);
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Base ───────────────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at 80% -10%, rgba(99, 102, 241, 0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 110%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
  color: var(--text-1);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ── Site header ────────────────────────────────────────── */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-1);
  text-decoration: none;
  background: linear-gradient(135deg, var(--accent-hi), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  /* SVG uses gradient fill — override text-fill to show image */
  -webkit-text-fill-color: initial;
}

.brand-subject {
  font-weight: 400;
  color: var(--text-3);
  font-size: 0.88rem;
  -webkit-text-fill-color: var(--text-3);
  background: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-link {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
}

.nav-link:hover {
  background: var(--surface-hi);
  color: var(--text-1);
}

.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent-hi);
}

.nav-link-review {
  color: var(--text-3);
  font-size: 0.78rem;
}

.nav-link-review:hover {
  background: var(--surface-hi);
  color: var(--text-2);
}

.nav-mode-toggle {
  background: none;
  border: 1px solid currentColor;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.78rem;
  font-family: inherit;
  padding: 0.2rem 0.55rem;
}

.nav-mode-ai {
  color: #7c9fff;
  border-color: #7c9fff55;
}

.nav-mode-ai:hover {
  background: #7c9fff22;
}

.nav-mode-mixed {
  color: var(--text-3);
  border-color: var(--surface-hi);
}

.nav-mode-mixed:hover {
  background: var(--surface-hi);
  color: var(--text-2);
}

/* ── Container ──────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ── Index page ─────────────────────────────────────────── */
body.index-body {
  background: var(--bg);
}

body.index-body .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4rem 1.5rem 3rem;
}

.index-header {
  text-align: center;
  margin-bottom: 3rem;
  background: none !important;
  border: none !important;
  padding: 0 !important;
  box-shadow: none !important;
}

.index-header h1 {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #f1f5f9 0%, var(--accent-hi) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.index-header p {
  color: var(--text-2);
  font-size: 1rem;
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(260px, 340px));
  gap: 1.25rem;
  width: 100%;
  justify-content: center;
}

@media (max-width: 900px) {
  .subjects-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
}

.subject-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  cursor: default;
}

.subject-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--accent);
  border-color: var(--accent);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.1rem;
}

.subject-icon {
  font-size: 2rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-hi);
  border-radius: var(--radius);
  flex-shrink: 0;
}

.card-header-text { flex: 1; }

.card-header-text .subject-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.01em;
  margin-bottom: 0.1rem;
}

.card-header-text .subject-code {
  font-size: 0.75rem;
  color: var(--text-3);
}

.due-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.due-badge-urgent {
  background: var(--warning-soft);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.due-badge-clear {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.card-stats {
  display: flex;
  gap: 1rem;
  font-size: 0.80rem;
  color: var(--text-2);
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
  align-items: center;
  border-top: 1px solid var(--border-soft);
  padding-top: 0.85rem;
}

.predicted-grade {
  font-weight: 700;
  color: var(--accent-hi);
  margin-left: auto;
}

.predicted-grade-none {
  color: var(--text-3);
  margin-left: auto;
}

.coverage-track {
  height: 5px;
  background: var(--surface-hi);
  border-radius: 3px;
  margin-top: 0.6rem;
  overflow: hidden;
}

.coverage-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hi));
  border-radius: 3px;
  transition: width 0.6s ease;
}

.coverage-label {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 0.3rem;
  text-align: right;
}

.card-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 1.1rem;
}

.btn-start-session {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.1rem;
  background: var(--accent);
  color: white;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
  flex: 1;
  white-space: nowrap;
}

.btn-start-session:hover {
  background: var(--accent-hi);
  transform: translateY(-1px);
}

.btn-browse-topics {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 0.9rem;
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  white-space: nowrap;
}

.btn-browse-topics:hover {
  border-color: var(--accent);
  color: var(--accent-hi);
  background: var(--accent-soft);
}

/* ── Shared header (legacy, non-index pages) ─────────────── */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  color: var(--text-1);
  padding: 1.25rem 1.5rem;
}

.header h1 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; }
.header p   { color: var(--text-2); font-size: 0.92rem; margin-top: 0.25rem; }

/* ── Breadcrumb / sub-nav ────────────────────────────────── */
.practice-breadcrumb {
  background: var(--surface);
  padding: 0.6rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
}

.practice-breadcrumb a {
  color: var(--accent-hi);
  text-decoration: none;
  font-weight: 500;
}

.practice-breadcrumb a:hover { text-decoration: underline; }
.practice-breadcrumb .progress { margin-left: auto; color: var(--text-3); }

/* ── Topics page ────────────────────────────────────────── */
.review-prompt {
  background: var(--warning-soft);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius);
  padding: 0.8rem 1.2rem;
  margin-bottom: 1.25rem;
  font-size: 0.88rem;
  color: var(--warning);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.review-prompt a {
  color: var(--warning);
  font-weight: 700;
  text-decoration: underline;
  white-space: nowrap;
}

.stats-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
  display: flex;
  gap: 2.5rem;
}

.stat-item h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-hi);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-item p {
  color: var(--text-3);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.2rem;
}

.subject-summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  font-size: 0.85rem;
}

.subject-summary strong { color: var(--text-1); }
.summary-covered  { color: var(--success); }
.summary-sparse   { color: var(--warning); }
.summary-missing  { color: var(--danger); }

.subtopic-list {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.subtopic-item {
  display: flex;
  align-items: center;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-soft);
  transition: background 0.12s;
  gap: 1rem;
}

.subtopic-item:last-child { border-bottom: none; }
.subtopic-item:hover { background: var(--surface-hi); }

.subtopic-info { flex: 1; min-width: 0; }

.subtopic-code {
  font-size: 0.78rem;
  color: var(--accent-hi);
  font-weight: 600;
  margin-bottom: 0.15rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.subtopic-name {
  color: var(--text-1);
  font-size: 0.88rem;
  font-weight: 500;
  margin-top: 0.15rem;
}

.coverage-bar {
  width: 100%;
  max-width: 120px;
  height: 4px;
  background: var(--surface-top);
  border-radius: 2px;
  margin-top: 0.45rem;
  overflow: hidden;
}

.coverage-bar .coverage-fill {
  transition: width 0.4s ease;
}

.coverage-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.12rem 0.45rem;
  border-radius: 20px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-missing { background: var(--danger-soft);  color: var(--danger); }
.badge-sparse  { background: var(--warning-soft); color: var(--warning); }
.badge-covered { background: var(--success-soft); color: var(--success); }

.subtopic-due {
  display: inline-block;
  background: var(--warning-soft);
  color: var(--warning);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.12rem 0.45rem;
  border-radius: 10px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.subtopic-stats {
  display: flex;
  gap: 1.5rem;
  text-align: center;
  flex-shrink: 0;
}

.subtopic-stat .value {
  font-weight: 700;
  color: var(--text-1);
  font-size: 0.95rem;
  line-height: 1;
}

.subtopic-stat .label {
  font-size: 0.68rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.15rem;
}

.subtopic-actions {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.btn-practice-now {
  background: var(--success);
  color: white;
  text-decoration: none;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.15s, transform 0.1s;
}

.btn-practice-now:hover {
  background: #059669;
  transform: translateY(-1px);
}

/* ── Shared buttons ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  transition: all 0.15s;
}

.btn-primary {
  background: linear-gradient(135deg, #7c3aed, var(--accent));
  color: white;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #8b5cf6, var(--accent-hi));
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--surface-hi);
  color: var(--text-1);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface-top); }

/* ── Dashboard stats grid ───────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
}

.stat-card h3 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-hi);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-card p { color: var(--text-2); font-size: 0.8rem; margin-top: 0.3rem; }

.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.section h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.88rem;
}

th {
  color: var(--text-3);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

td { color: var(--text-1); }

tr:last-child td { border-bottom: none; }

.accuracy-high { color: var(--success); font-weight: 600; }
.accuracy-med  { color: var(--warning); font-weight: 600; }
.accuracy-low  { color: var(--danger);  font-weight: 600; }

/* ── Dashboard dark panels ──────────────────────────────── */
/* (subject_dashboard has inline styles; these supplement them) */
.missed-phrases-subtitle {
  font-size: 0.80rem;
  color: var(--text-3);
  margin: -0.5rem 0 1rem 0;
}

.missed-phrases-list { list-style: none; padding: 0; margin: 0; }

.missed-phrase-item {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-soft);
}
.missed-phrase-item:last-child { border-bottom: none; }

.missed-phrase-text {
  font-size: 0.88rem;
  color: var(--text-2);
  margin-bottom: 0.3rem;
  font-style: italic;
}

.missed-phrase-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.miss-rate-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--danger);
  background: var(--danger-soft);
  padding: 0.12rem 0.5rem;
  border-radius: 10px;
}

.practice-link {
  font-size: 0.75rem;
  color: var(--accent-hi);
  text-decoration: none;
}
.practice-link:hover { text-decoration: underline; }

/* ── Marks / question meta ──────────────────────────────── */
.marks-badge {
  background: var(--accent);
  color: white;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
}

/* ── Utility ────────────────────────────────────────────── */
select {
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  background: var(--surface-hi);
  color: var(--text-1);
  font-family: inherit;
}

select:focus {
  outline: none;
  border-color: var(--accent);
}

code {
  font-size: 0.82em;
  background: var(--surface-hi);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  color: var(--accent-hi);
}

/* ── Nav polish ─────────────────────────────────────────── */
.nav-user {
  font-size: 0.8rem;
  color: var(--text-3);
  padding: 0 0.25rem;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-link-logout {
  background: none;
  border: 1px solid var(--border);
  cursor: pointer;
  font-family: inherit;
  padding: 0.28rem 0.75rem !important;
  border-radius: 20px !important;
  font-size: 0.8rem !important;
  color: var(--text-3) !important;
  letter-spacing: 0;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.nav-link-logout:hover {
  background: var(--danger-soft) !important;
  border-color: rgba(239, 68, 68, 0.3) !important;
  color: #fca5a5 !important;
}

/* ── Auth pages ─────────────────────────────────────────── */
.auth-page {
  min-height: calc(100vh - 52px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  position: relative;
  overflow: hidden;
}

.auth-page::before {
  content: '';
  position: absolute;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.14) 0%, transparent 65%);
  pointer-events: none;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2.25rem;
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(99, 102, 241, 0.06);
  position: relative;
  z-index: 1;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 2rem;
}

.auth-brand-logo {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.auth-brand-name {
  font-size: 1rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-hi), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}

.auth-title {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-1);
  margin-bottom: 1.75rem;
  line-height: 1.2;
}

.auth-error {
  background: var(--danger-soft);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #fca5a5;
  border-radius: var(--radius);
  padding: 0.65rem 1rem;
  font-size: 0.88rem;
  margin-bottom: 1.25rem;
}

/* ── Auth form inputs ────────────────────────────────────── */
.form-group {
  margin-bottom: 1.1rem;
}

.form-group label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"] {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--surface-hi);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-1);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  -webkit-appearance: none;
}

.form-group input[type="email"]:focus,
.form-group input[type="password"]:focus,
.form-group input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder {
  color: var(--text-3);
}

.form-hint {
  display: block;
  font-size: 0.74rem;
  color: var(--text-3);
  margin-top: 0.35rem;
}

.btn-full {
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.78rem 1rem;
  font-size: 0.95rem;
  background: linear-gradient(135deg, #7c3aed, var(--accent));
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
  letter-spacing: 0.01em;
}

.btn-full:hover {
  background: linear-gradient(135deg, #8b5cf6, var(--accent-hi));
  box-shadow: 0 6px 28px rgba(99, 102, 241, 0.55);
  transform: translateY(-1px);
}

.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-3);
}

.auth-footer a {
  color: var(--accent-hi);
  text-decoration: none;
  font-weight: 600;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 640px) {
  .subjects-grid { grid-template-columns: 1fr; }
  .subtopic-stats { display: none; }
  .site-nav .nav-link-review { display: none; }
  .index-header h1 { font-size: 2rem; }
  .container { padding: 1.5rem 1rem; }
  .auth-card { padding: 2rem 1.5rem; }
  .nav-user { display: none; }
}

/* ── Generation Review Queue ────────────────────────────── */
.rq-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.rq-subtitle {
  color: var(--text-2);
  font-size: 0.88rem;
  margin-top: 0.25rem;
}

.rq-tabs {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-shrink: 0;
}

.rq-tab {
  padding: 0.42rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface-hi);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: all 0.15s;
}

.rq-tab:hover { color: var(--text-1); border-color: var(--border-soft); }
.rq-tab.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-hi); }

/* Card */
.rq-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.75rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.rq-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-soft);
  background: var(--surface-hi);
  flex-wrap: wrap;
}

.rq-card-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.rq-topic-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: var(--accent-soft);
  color: var(--accent-hi);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: var(--radius-sm);
  padding: 0.18rem 0.55rem;
}

.rq-topic-name {
  font-size: 0.92rem;
  color: var(--text-2);
}

.rq-card-badges {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.rq-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.rq-badge-marks  { background: rgba(148,163,184,0.1); color: var(--text-2); border-color: var(--border); }
.rq-badge-diff   { background: rgba(148,163,184,0.08); color: var(--text-3); border-color: var(--border-soft); text-transform: capitalize; }
.rq-badge-good   { background: var(--success-soft); color: var(--success); border-color: rgba(16,185,129,0.25); }
.rq-badge-ok     { background: var(--warning-soft); color: var(--warning); border-color: rgba(245,158,11,0.25); }
.rq-badge-warn   { background: var(--danger-soft);  color: var(--danger);  border-color: rgba(239,68,68,0.25); }

/* Exam body */
.rq-exam-body {
  padding: 1.5rem 1.75rem;
  font-size: 0.97rem;
  line-height: 1.65;
  color: var(--text-1);
}

.rq-context {
  background: rgba(255,255,255,0.03);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.25rem;
  color: var(--text-1);
  font-size: 0.95rem;
  line-height: 1.7;
}

.rq-parts-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: part-counter;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.rq-part {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  counter-increment: part-counter;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-soft);
}

.rq-part:last-child { border-bottom: none; }

.rq-part::before {
  content: "(" counter(part-counter, lower-alpha) ")";
  flex-shrink: 0;
  font-weight: 600;
  color: var(--text-2);
  min-width: 1.8rem;
  font-size: 0.9rem;
}

.rq-part-text {
  flex: 1;
  color: var(--text-1);
}

.rq-part-marks {
  flex-shrink: 0;
  font-size: 0.82rem;
  color: var(--text-3);
  white-space: nowrap;
}

/* Mark scheme */
.rq-ms {
  border-top: 1px solid var(--border-soft);
}

.rq-ms-toggle {
  padding: 0.75rem 1.75rem;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-3);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  user-select: none;
  transition: color 0.15s;
}

.rq-ms-toggle::before { content: "▶"; font-size: 0.6rem; transition: transform 0.15s; }
.rq-ms[open] .rq-ms-toggle::before { transform: rotate(90deg); }
.rq-ms-toggle:hover { color: var(--text-2); }

.rq-ms-body {
  padding: 0.5rem 1.75rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rq-ms-part {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.rq-ms-ref {
  flex-shrink: 0;
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--accent-hi);
  min-width: 1.8rem;
  padding-top: 0.05rem;
}

.rq-ms-criteria {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.rq-ms-criteria li {
  font-size: 0.88rem;
  color: var(--text-2);
  padding-left: 1rem;
  position: relative;
}

.rq-ms-criteria li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--text-3);
}

/* Validator flag */
.rq-flag-note {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin: 0 1.25rem;
  padding: 0.8rem 1rem;
  background: var(--warning-soft);
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: var(--radius);
  font-size: 0.86rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.rq-flag-icon {
  font-size: 1rem;
  color: var(--warning);
  flex-shrink: 0;
  margin-top: 0.05rem;
}

.rq-flag-text { color: var(--text-2); }
.rq-flag-text strong { color: var(--warning); }

/* Actions */
.rq-actions {
  display: flex;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-soft);
  background: var(--surface-hi);
}

.rq-btn-approve {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid rgba(16,185,129,0.3);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.rq-btn-approve:hover {
  background: rgba(16,185,129,0.2);
  box-shadow: 0 0 0 2px rgba(16,185,129,0.2);
  transform: none;
}

.rq-btn-reject {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.3);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.rq-btn-reject:hover {
  background: rgba(239,68,68,0.2);
  box-shadow: 0 0 0 2px rgba(239,68,68,0.2);
  transform: none;
}

.rq-actions kbd {
  font-size: 0.72rem;
  font-family: inherit;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 3px;
  padding: 0.05rem 0.3rem;
  opacity: 0.7;
}

/* Empty state */
.rq-empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-3);
  font-size: 1rem;
}

.rq-empty-icon {
  font-size: 2.5rem;
  color: var(--success);
  margin-bottom: 0.75rem;
}

/* ── Subtopic tree ───────────────────────────────────────── */
.subtopic-toggle {
  background: none;
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 0.5rem;
  transition: background 0.15s;
}
.subtopic-toggle:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
}
.subtopic-children .subtopic-item {
  background: rgba(255,255,255,0.03);
  border-left: 2px solid var(--accent);
  margin-left: 1rem;
}
.subtopic-child-empty {
  opacity: 0.5;
}