:root {
  /* "Doska va bo'r" (chalkboard & chalk) palette — chalk-gold is now the
     ONE structural color (links, icons, buttons, borders), matching the
     Stitch-generated mockups; deep board-green moved to --accent, used for
     dark-mode/hero surfaces and as a secondary highlight. */
  --primary: #d9a441;
  --primary-dark: #c28f34;
  --primary-light: #f6ecd6;
  --accent: #2f6a54;
  --accent-dark: #1f4a3d;
  --accent-ink: #eef0ea;
  --ink-on-gold: #4a3413;
  --board: #16332a;
  --board-soft: #21493c;
  --success: #16a34a;
  --success-light: #dcfce7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --bg: #ebeee3;
  --surface: #f8f9f4;
  --text: #1b2621;
  --text-muted: #5c6b58;
  --border: #d7dccd;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(22, 38, 31, 0.05), 0 2px 8px rgba(22, 38, 31, 0.07);
  --shadow-hover: 0 4px 12px rgba(22, 38, 31, 0.07), 0 12px 28px rgba(22, 38, 31, 0.11);
}

* { box-sizing: border-box; }

body {
  font-family: 'Karla', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg);
  margin: 0;
  padding: 0;
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .brand {
  font-family: 'Bitter', Georgia, 'Times New Roman', serif;
}

.mono, .xp-level-chip, .rank-badge, .streak-badge {
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

/* Unauthenticated legacy pages (invite registration) get a centered gradient
   stage. Pages carrying their own considered background (landing, login —
   flagged via body-landing) opt out so this doesn't bleed underneath them. */
body:not(:has(.nav-bar)):not(.body-landing) {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #16332a 0%, #21493c 55%, #2f6a54 100%);
  background-attachment: fixed;
}
body:not(:has(.nav-bar)):not(.body-landing) .page { width: 100%; }

a { color: var(--primary); }

/* ---------- Yon panel (sidebar) — TailAdmin uslubi: och/oq karta,
   nozik border, primary-tint hover/active (avvalgi to'q-yashil gradient
   o'rniga). Struktura/JS ilgaklari (nav-toggle checkbox, sidebar-collapse-btn,
   860px breakpoint) o'zgarishsiz — faqat ranglar/bo'shliq TailAdmin'ga mos. */
.nav-bar {
  background: var(--surface);
  color: var(--text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  padding: 20px 14px;
  z-index: 50;
  border-right: 1px solid var(--border);
  box-shadow: none;
  transition: width 0.22s ease;
}
html.sidebar-collapsed .nav-bar { width: 76px; }

body:has(.nav-bar) { padding-left: 260px; transition: padding-left 0.22s ease; }
html.sidebar-collapsed body:has(.nav-bar) { padding-left: 76px; }

.nav-toggle-checkbox { display: none; }
.nav-toggle-label { display: none; }

.nav-bar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  padding: 0 4px;
}

.sidebar-collapse-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 7px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: background 0.15s ease, color 0.15s ease, transform 0.25s ease;
}
.sidebar-collapse-btn:hover { background: var(--primary-light); color: var(--primary-dark); }
html.sidebar-collapsed .sidebar-collapse-btn { transform: rotate(180deg); }

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
  /* Scrolling lives here (not on .nav-bar) so a long menu list still scrolls
     internally, but .nav-user's popups (language switcher) aren't clipped by
     an ancestor's overflow -- CSS can't have one axis "auto" and the other
     fully "visible" on the SAME element (overflow-y:auto silently forces
     overflow-x:auto too), which was cutting the language dropdown's text off
     against the sidebar edge. */
  overflow-y: auto;
  min-height: 0;
}
.nav-user {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.nav-bar a, .nav-bar button.link-button {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-bar a:hover, .nav-bar button.link-button:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  text-decoration: none;
}

.link-icon { flex-shrink: 0; font-size: 16px; width: 18px; text-align: center; }
.link-label { overflow: hidden; text-overflow: ellipsis; }
html.sidebar-collapsed .link-label,
html.sidebar-collapsed .nav-user-info { display: none; }

.nav-bar .brand {
  font-family: 'Bitter', Georgia, serif;
  font-weight: 800;
  font-size: 17px;
  color: var(--primary-dark);
  padding: 6px 4px;
  letter-spacing: -0.01em;
  gap: 10px;
  width: auto;
}
.nav-bar .brand:hover { background: transparent; opacity: 0.85; }
.nav-bar .brand .link-icon { font-size: 20px; }

.nav-bar form { display: block; }

.notif-dot {
  display: inline-block;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  background: var(--danger);
  color: white;
  font-size: 10.5px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
  vertical-align: middle;
  flex-shrink: 0;
}

.nav-user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 6px;
  color: inherit;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background 0.15s ease;
}
.nav-user-chip:hover { background: rgba(255, 255, 255, 0.08); }

.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  color: var(--ink-on-gold);
  background: var(--primary);
  flex-shrink: 0;
}
.nav-avatar.role-head_teacher { background: linear-gradient(135deg, #16332a, #2f6a54); }
.nav-avatar.role-admin { background: linear-gradient(135deg, #0891b2, #0e7490); }
.nav-avatar.role-teacher { background: linear-gradient(135deg, #16a34a, #15803d); }
.nav-avatar.role-student { background: linear-gradient(135deg, #d97706, #b45309); }
.nav-avatar.role-parent { background: linear-gradient(135deg, #7c3aed, #6d28d9); }

.nav-user-info {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
}
.nav-user-info small {
  font-weight: 500;
  font-size: 11px;
  color: var(--text-muted);
}

@media (max-width: 860px) {
  .nav-bar {
    position: sticky;
    top: 0; left: auto;
    width: auto !important;
    height: auto;
    flex-direction: column;
    align-items: stretch;
    padding: 10px 16px;
  }
  body:has(.nav-bar) { padding-left: 0 !important; }

  .nav-bar-top { justify-content: space-between; width: 100%; margin-bottom: 0; }
  .nav-toggle-label { display: block; font-size: 22px; line-height: 1; cursor: pointer; padding: 6px 10px; border-radius: var(--radius-sm); color: var(--text-muted); -webkit-user-select: none; user-select: none; }
  .nav-toggle-label:hover { background: var(--primary-light); color: var(--primary-dark); }
  .sidebar-collapse-btn { display: none; }

  .nav-links, .nav-user {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    margin-left: 0;
    flex: none;
  }
  .nav-links { margin-top: 8px; }
  .nav-user { margin-top: 8px; }
  .nav-toggle-checkbox:checked ~ .nav-links,
  .nav-toggle-checkbox:checked ~ .nav-user { display: flex; }

  .nav-bar a, .nav-bar button.link-button { padding: 10px 12px; }
  .link-label { display: inline !important; }
  .nav-user-info { display: flex !important; }
  .nav-user-chip { padding: 6px 4px; }
}

/* ---------- Layout ---------- */
.page {
  max-width: 960px;
  margin: 32px auto;
  padding: 0 20px 40px;
}

h1 { text-align: center; color: var(--text); font-weight: 800; letter-spacing: -0.02em; }
h2 { color: var(--text); font-weight: 700; letter-spacing: -0.01em; }

/* ---------- Cards ---------- */
.test-qutisi {
  background: var(--surface);
  padding: 32px;
  border-radius: var(--radius-lg);
  max-width: 440px;
  margin: 0 auto;
  box-shadow: 0 20px 50px rgba(17, 24, 39, 0.25);
}

body:has(.nav-bar) .test-qutisi {
  max-width: 640px;
  box-shadow: var(--shadow);
  padding: 20px;
}

body:not(:has(.nav-bar)) .test-qutisi h1 {
  font-size: 21px;
  margin: 0 0 6px;
}
body:not(:has(.nav-bar)) .test-qutisi > p {
  text-align: center;
  color: var(--text-muted);
  font-size: 13.5px;
  margin-top: 0;
}

.card {
  background: var(--surface);
  padding: 22px 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  border: 1px solid rgba(17, 24, 39, 0.04);
}

.savol { font-size: 18px; font-weight: 700; margin-bottom: 16px; color: var(--text); }

/* ---------- Collapsible topic groups ---------- */
details.topic-group summary {
  list-style: none;
  cursor: pointer;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 8px;
  -webkit-user-select: none;
  user-select: none;
}
details.topic-group summary::-webkit-details-marker { display: none; }
details.topic-group summary::before {
  content: '▸';
  color: var(--primary);
  font-size: 14px;
  transition: transform 0.15s ease;
}
details.topic-group[open] summary::before { transform: rotate(90deg); }
details.topic-group table { margin-top: 16px; }

details.topic-subgroup {
  margin: 8px 0 8px 20px;
  padding: 10px 14px;
  background: var(--bg, #f9fafb);
  border-radius: var(--radius-sm, 8px);
  border: 1px solid rgba(17, 24, 39, 0.06);
}
details.topic-subgroup summary {
  list-style: none;
  cursor: pointer;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 8px;
  -webkit-user-select: none;
  user-select: none;
}
details.topic-subgroup summary::-webkit-details-marker { display: none; }
details.topic-subgroup summary::before {
  content: '▸';
  color: var(--primary);
  font-size: 12px;
  transition: transform 0.15s ease;
}
details.topic-subgroup[open] summary::before { transform: rotate(90deg); }
details.topic-subgroup table { margin-top: 12px; }

/* ---------- Answer variants ---------- */
.variant {
  margin: 10px 0;
  padding: 13px 16px;
  background: #f1f3ec;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  font-size: 15px;
}

.variant:hover { background: var(--primary-light); transform: translateX(2px); }
.variant.selected { background: var(--primary-light); border-color: var(--primary); font-weight: 600; }
.variant.correct { background: var(--success-light); border-color: var(--success); font-weight: 600; }
.variant.incorrect { background: var(--danger-light); border-color: var(--danger); }

/* ---------- Tables ---------- */
.card { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td:first-child, th:first-child { white-space: normal; }

th {
  background: #f0f2e9;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tbody tr { transition: background 0.12s ease; }
tbody tr:hover { background: #f4f6ee; }
tbody tr:last-child td { border-bottom: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 9px 18px;
  background: var(--primary);
  color: var(--ink-on-gold);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  transition: background 0.15s ease, transform 0.15s cubic-bezier(.34,1.56,.64,1), box-shadow 0.15s ease, filter 0.15s ease;
  box-shadow: 0 1px 2px rgba(22, 38, 31, 0.18), 0 2px 0 0 var(--primary-dark);
}

.btn:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 6px 14px rgba(22, 38, 31, 0.22), 0 2px 0 0 var(--primary-dark); }
.btn:active { transform: translateY(1px); filter: brightness(0.97); box-shadow: 0 1px 1px rgba(22, 38, 31, 0.2); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; filter: none; }

.btn-danger { background: var(--danger); color: white; box-shadow: 0 1px 2px rgba(220, 38, 38, 0.18), 0 2px 0 0 #b91c1c; }
.btn-danger:hover { box-shadow: 0 6px 14px rgba(220, 38, 38, 0.28), 0 2px 0 0 #b91c1c; }

.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.btn-secondary:hover { background: var(--bg); border-color: var(--primary); box-shadow: none; filter: none; }
.btn-secondary:active { background: var(--border); }

/* "Doska va bo'r" bo'r-ohangdagi teg va ajratgich -- Stitch mockuplaridan,
   kirish/ro'yxatdan o'tish kabi sahifalarda sarlavha ustida ishlatiladi. */
.eyebrow {
  display: inline-block;
  border: 1px dashed var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 10px;
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.chalk-divider {
  border: none;
  border-bottom: 1px dashed var(--primary);
  margin: 0 0 32px;
}

.login-submit-btn {
  width: 100%;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 700;
  margin-top: 4px;
  box-shadow: 0 4px 0 0 var(--ink-on-gold);
}
.login-submit-btn:hover { box-shadow: 0 4px 0 0 var(--ink-on-gold); filter: brightness(1.05); }
.login-submit-btn:active { transform: translateY(2px); box-shadow: 0 2px 0 0 var(--ink-on-gold); }

/* ---------- Kirish sahifasi: OAuth tugmalari ---------- */
.login-oauth-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  padding: 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: transform 0.15s cubic-bezier(.34,1.56,.64,1), border-color 0.15s ease, box-shadow 0.15s ease;
}
.login-oauth-btn:hover { border-color: var(--primary); box-shadow: 0 4px 12px rgba(22, 38, 31, 0.08); transform: translateY(-1px); }
.login-oauth-btn:active { transform: translateY(1px); }
.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 12px;
  margin: 18px 0;
}
.login-divider::before, .login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

form.inline-form { display: inline; }

/* ---------- Forms ---------- */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 13.5px; color: var(--text); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  box-sizing: border-box;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: white;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.error-msg {
  color: #991b1b;
  background: var(--danger-light);
  border: 1px solid #fecaca;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  font-size: 14px;
}
.success-msg {
  color: #14532d;
  background: var(--success-light);
  border: 1px solid #bbf7d0;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  font-size: 14px;
}

.slot-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}
.slot-row select, .slot-row input { flex: 1; }
.pool-hint { font-size: 12px; color: var(--text-muted); min-width: 90px; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary-dark);
}
.badge-oson { background: var(--success-light); color: #166534; }
.badge-orta { background: var(--warning-light); color: #92400e; }
.badge-qiyin { background: var(--danger-light); color: #991b1b; }
.badge-success { background: var(--success-light); color: #166534; }
.badge-danger { background: var(--danger-light); color: #991b1b; }
.badge-muted { background: var(--border); color: var(--text-muted); }

/* ---------- Faolsizlantirilgan qatorlar (foydalanuvchi/mehmon ro'yxatlari) ---------- */
.row-inactive { opacity: 0.55; }

/* ---------- Jadval qatorlarini yengil ajratish ---------- */
table.table-zebra tbody tr:nth-child(even) { background: var(--bg); }
[data-bs-theme="dark"] table.table-zebra tbody tr:nth-child(even) { background: rgba(255,255,255,0.02); }

/* ---------- Test-taking progress ---------- */
.progress-bar-outer {
  max-width: 640px;
  margin: 0 auto 18px;
  background: var(--border);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
}
.progress-bar-inner {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  width: 0%;
  transition: width 0.25s ease;
}

.nav-strip {
  max-width: 640px;
  margin: 0 auto 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}
.nav-strip .nav-dot {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: white;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s ease;
}
.nav-strip .nav-dot:hover { transform: translateY(-2px); }
.nav-strip .nav-dot.answered { background: var(--success-light); border-color: var(--success); color: #166534; }
.nav-strip .nav-dot.flagged { background: var(--warning-light); border-color: var(--warning); color: #92400e; }
.nav-strip .nav-dot.current { border-color: var(--primary); border-width: 3px; color: var(--primary-dark); }
.nav-strip .nav-dot.correct { background: var(--success-light); border-color: var(--success); color: #166534; }
.nav-strip .nav-dot.incorrect { background: var(--danger-light); border-color: var(--danger); color: #991b1b; }
.nav-strip .nav-dot.correct, .nav-strip .nav-dot.incorrect { cursor: pointer; text-decoration: none; }

.question-nav-controls {
  max-width: 640px;
  margin: 18px auto;
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.text-answer-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.text-answer-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* ---------- AI loading indicator ---------- */
.ai-loading {
  display: none;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--primary-light);
  border: 1px solid #bcd9c9;
  border-radius: var(--radius-sm);
  animation: page-fade-in 0.2s ease both;
}
/* [hidden] alone loses to the .ai-loading class rule above on equal
   specificity — force it explicitly so the indicator stays hidden
   until JS adds .visible. */
.ai-loading[hidden] { display: none; }
.ai-loading.visible { display: flex; }
.ai-loading-title { font-weight: 700; color: var(--primary-dark); font-size: 14px; }
.ai-loading-sub { font-size: 12.5px; color: var(--text-muted); margin-top: 2px; }

.ai-spinner {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 3px solid #bcd9c9;
  border-top-color: var(--primary);
  animation: ai-spin 0.8s linear infinite;
}
@keyframes ai-spin { to { transform: rotate(360deg); } }

/* ---------- Misc ---------- */
.ai-feedback:not(:empty) {
  background: var(--primary-light);
  border: 1px solid #bcd9c9;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
}

/* Empty-state placeholder rows (single <td colspan> with no other data cells) */
td[colspan] {
  text-align: center;
  padding: 44px 20px !important;
  color: var(--text-muted);
  font-size: 14px;
  white-space: normal;
}
td[colspan]::before {
  content: "🗂️";
  display: block;
  font-size: 26px;
  margin-bottom: 10px;
  opacity: 0.55;
}

/* Page entrance animation */
.page {
  animation: page-fade-in 0.28s ease both;
}
@keyframes page-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  transition: box-shadow 0.15s ease;
}
.card:hover { box-shadow: var(--shadow-hover); }

::selection { background: var(--primary); color: var(--ink-on-gold); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c3cabb; border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: #a4ac97; }

a:focus-visible, button:focus-visible, .btn:focus-visible, .variant:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .page { margin: 16px auto; padding: 0 12px 30px; }
  .nav-bar { padding: 10px 16px; }
  .card, .test-qutisi { padding: 16px; }
  table { min-width: 480px; }
  .question-nav-controls { flex-wrap: wrap; }
  .question-nav-controls .btn { flex: 1 1 auto; min-width: 90px; }
}

/* ---------- Daraja ko'tarilish modali ---------- */
.level-up-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(17, 24, 39, 0.55);
  animation: gam-fade-in 0.25s ease both;
  cursor: pointer;
}
@keyframes gam-fade-in { from { opacity: 0; } to { opacity: 1; } }
.level-up-card {
  cursor: default;
  text-align: center;
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, #16332a, #2f6a54 70%, #d9a441 100%);
  color: white;
  max-width: 360px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
  animation: gam-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.level-up-card .level-up-icon { font-size: 52px; animation: gam-bounce 1.1s ease infinite; }
.level-up-card h2 { color: white; margin: 10px 0 6px; }
.level-up-card p { margin: 0 0 18px; opacity: 0.95; }
.level-up-card button {
  background: white;
  color: var(--ink-on-gold);
  border: none;
  padding: 10px 24px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s cubic-bezier(.34,1.56,.64,1);
}
.level-up-card button:hover { transform: translateY(-2px); }
.level-up-card button:active { transform: translateY(1px); }
@keyframes gam-pop { 0% { transform: scale(0.85); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }
@keyframes gam-bounce {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-8px) rotate(-8deg); }
  50% { transform: translateY(0) rotate(0deg); }
  75% { transform: translateY(-4px) rotate(8deg); }
}

/* ---------- Yutuq toast (login streak va h.k.) ---------- */
.achievement-toast-wrap {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: min(92vw, 380px);
}
.achievement-toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #16332a, #2f6a54 60%, #d9a441 100%);
  color: white;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  box-shadow: 0 10px 30px rgba(22, 51, 42, 0.35);
  animation: gam-toast-in 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both, gam-toast-out 0.4s ease 5s forwards;
}
.achievement-toast-icon { font-size: 22px; flex-shrink: 0; }
.achievement-toast-desc { font-size: 12.5px; opacity: 0.9; }
@keyframes gam-toast-in {
  from { transform: translateY(-16px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes gam-toast-out {
  to { transform: translateY(-16px); opacity: 0; visibility: hidden; }
}

/* ---------- Och/qorong'u rejim almashtirgich tugmasi ---------- */
.theme-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 8px 10px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.82);
  transition: background 0.15s ease;
}
.nav-bar .theme-toggle-btn:hover { background: rgba(255, 255, 255, 0.1); }

.theme-toggle-standalone {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 8px;
}
.theme-toggle-standalone .theme-toggle-btn {
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
}
.theme-toggle-standalone .theme-toggle-btn:hover { background: var(--bg); }
.theme-toggle-standalone .lang-switcher-btn { box-shadow: var(--shadow); }
.theme-toggle-standalone .lang-switcher-menu { right: 0; }

/* ---------- Til almashtirgich ---------- */
.lang-switcher { position: relative; }
.lang-switcher-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  padding: 8px 10px;
  border-radius: 999px;
  transition: background 0.15s ease, transform 0.15s ease;
}
.lang-switcher-btn:hover { background: var(--bg); }
.lang-switcher-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-hover);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 150px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  z-index: 60;
}
.lang-switcher:hover .lang-switcher-menu,
.lang-switcher:focus-within .lang-switcher-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.lang-switcher-menu a {
  display: block;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
}
.lang-switcher-menu a:hover { background: var(--bg); }
.lang-switcher-menu a.active { background: var(--primary-light); color: var(--primary-dark); font-weight: 700; }

/* Sidebar (nav-bar) ichida til menyusi pastdan emas, yon tomondan chiqadi */
.nav-bar .lang-switcher-menu { left: 0; right: auto; bottom: calc(100% + 6px); top: auto; }

/* ---------- Qorong'u rejim: doskaning o'zi ---------- */
[data-bs-theme="dark"] {
  --bg: #12211c;
  --surface: #1b332b;
  --text: #eef0ea;
  --text-muted: #9db3a4;
  --border: #2c473c;
  --primary-light: rgba(47, 106, 84, 0.24);
}
[data-bs-theme="dark"] th { background: #23392f; }
[data-bs-theme="dark"] .variant { background: #23392f; }
[data-bs-theme="dark"] tbody tr:hover { background: #23392f; }
[data-bs-theme="dark"] .form-group input,
[data-bs-theme="dark"] .form-group select,
[data-bs-theme="dark"] .form-group textarea { background: var(--surface); color: var(--text); }
[data-bs-theme="dark"] .btn-secondary { background: var(--surface); color: var(--text); }
[data-bs-theme="dark"] .btn-secondary:hover { background: #23392f; }
[data-bs-theme="dark"] .nav-strip .nav-dot { background: var(--surface); }
[data-bs-theme="dark"] details.topic-subgroup { background: #23392f; }

/* --- Bootstrap asosidagi yangi sahifalar (yutuqlar, duellar, admin panel) uchun qorong'u rejim o'zgaruvchilari --- */
:root {
  --bs-link-color-rgb: 47, 106, 84;
  --bs-link-hover-color-rgb: 31, 74, 61;
}

[data-bs-theme="dark"] {
  --bs-body-bg: #12211c;
  --bs-body-color: #eef0ea;
  --bs-tertiary-bg: #1b332b;
  --bs-light: #1b332b;
  --bs-light-rgb: 27, 51, 43;
  --bs-dark: #f8f9fa;
  --bs-dark-rgb: 248, 249, 250;
  --bs-border-color: #2c473c;
  --bs-link-color-rgb: 127, 199, 168;
  --bs-link-hover-color-rgb: 159, 218, 192;
  --bs-code-color: #e0ad4f;
}

[data-bs-theme="dark"] .progress-bar {
  color: #1a1a1a;
  font-weight: 500;
}