/* ===== Reset + tokens ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
:root {
  --bg: #0a0f1e;
  --bg-2: #0f172a;
  --bg-3: #111a32;
  --panel: rgba(255,255,255,0.04);
  --panel-strong: rgba(255,255,255,0.07);
  --border: rgba(148,163,184,0.18);
  --border-strong: rgba(148,163,184,0.32);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-mute: #64748b;
  --accent: #38bdf8;
  --accent-2: #a855f7;
  --good: #22c55e;
  --bad: #ef4444;
  --warn: #f59e0b;
}
body {
  background:
    radial-gradient(1100px 600px at 12% -5%, rgba(168,85,247,0.18), transparent 60%),
    radial-gradient(1100px 600px at 110% 10%, rgba(56,189,248,0.16), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
}
a { color: inherit; }

/* ===== Topbar ===== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(10,15,30,0.72);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1400px; margin: 0 auto;
  padding: 14px 26px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  text-decoration: none;
  font-weight: 700;
}
.brand-mark {
  font-size: 18px;
  font-weight: 800;
  padding: 6px 10px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg);
  letter-spacing: 0.6px;
}
.brand-name { font-size: 19px; letter-spacing: 0.5px; }
.brand-tag { font-size: 12px; color: var(--text-mute); font-weight: 400; }

.tabs { display: flex; gap: 6px; justify-self: center; }
.tab {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s ease;
}
.tab:hover { color: var(--text); border-color: var(--border-strong); background: var(--panel-strong); }
.tab.active { color: var(--bg); background: var(--text); border-color: var(--text); }
.tab-action { font-family: inherit; }

.search-wrapper { position: relative; min-width: 320px; }
#search {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(15,23,42,0.7);
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color .15s;
}
#search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,189,248,0.18); }
.search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  max-height: 420px; overflow-y: auto;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  display: none;
  z-index: 100;
}
.search-results.open { display: block; }
.search-result {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background .12s;
}
.search-result:last-child { border-bottom: none; }
.search-result:hover { background: var(--panel-strong); }
.search-result .sr-icon { font-size: 20px; }
.search-result .sr-title { font-weight: 600; }
.search-result .sr-short { color: var(--text-dim); font-size: 13px; }
.search-result .sr-cat { font-size: 11px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.4px; }

/* ===== Layout ===== */
.container { max-width: 1400px; margin: 0 auto; padding: 36px 26px 60px; }

/* ===== Hero ===== */
.hero {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 36px;
  margin-bottom: 36px;
  background: linear-gradient(135deg, rgba(168,85,247,0.12), rgba(56,189,248,0.08));
  border: 1px solid var(--border);
  border-radius: 20px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 200px at 80% 0%, rgba(168,85,247,0.18), transparent);
  pointer-events: none;
}
.hero-text h1 {
  font-size: 32px; line-height: 1.15; margin: 0 0 14px;
  background: linear-gradient(135deg, #fff, #cbd5e1);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-text p { color: var(--text-dim); margin: 0 0 22px; }
.hero-text strong { color: var(--text); }
.hero-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.hero-btn {
  padding: 10px 20px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  transition: transform .15s;
}
.hero-btn:hover { transform: translateY(-2px); }
.hero-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
}
.hero-link:hover { color: var(--text); }

.hero-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  position: relative; z-index: 1;
}
.stat {
  background: rgba(15,23,42,0.7);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 18px;
  text-align: center;
}
.stat-num {
  display: block;
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-label { display: block; font-size: 12px; color: var(--text-mute); margin-top: 4px; }

/* ===== Categories ===== */
.categories { display: grid; gap: 26px; }
.cat-block {
  border: 1px solid var(--border);
  border-left: 3px solid var(--cat-color);
  border-radius: 16px;
  background: var(--bg-2);
  padding: 24px 26px 26px;
}
.cat-head {
  display: grid; grid-template-columns: 1fr 1.8fr; gap: 24px;
  align-items: start;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.cat-pill {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--cat-color) 18%, transparent);
  color: var(--cat-color);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.cat-head h2 { margin: 0; }
.cat-full { margin: 8px 0 0; color: var(--text); font-weight: 500; }
.cat-desc { margin: 0; color: var(--text-dim); font-size: 14px; line-height: 1.55; }

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.lesson-card {
  display: flex; flex-direction: column; align-items: flex-start;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: inherit;
  font: inherit;
  cursor: pointer;
  text-align: left;
  transition: all .15s ease;
  position: relative;
}
.lesson-card:hover {
  transform: translateY(-3px);
  border-color: var(--cat-color);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4), 0 0 24px color-mix(in srgb, var(--cat-color) 25%, transparent);
}
.lesson-icon { font-size: 22px; }
.lesson-level {
  position: absolute; top: 12px; right: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--cat-color) 18%, transparent);
  color: var(--cat-color);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.6px;
}
.lesson-title { font-weight: 600; font-size: 14.5px; color: var(--text); }
.lesson-short { font-size: 12.5px; color: var(--text-dim); line-height: 1.45; }

/* ===== Legend ===== */
.legend {
  margin-top: 36px;
  padding: 22px 26px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 16px;
}
.legend h3 { margin: 0 0 12px; font-size: 14px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.6px; }
.legend-row { display: flex; align-items: center; gap: 12px; padding: 6px 0; font-size: 13.5px; color: var(--text-dim); }
.level-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  font-weight: 700;
  font-size: 12px;
  min-width: 32px; text-align: center;
}

/* ===== Lesson page ===== */
.lesson-page { max-width: 920px; margin: 0 auto; }
.back-link {
  display: inline-block;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13.5px;
  margin-bottom: 18px;
  transition: color .15s;
}
.back-link:hover { color: var(--text); }

.lesson-header {
  padding: 26px 28px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--cat-color) 18%, transparent), transparent);
  border: 1px solid var(--border);
  border-left: 3px solid var(--cat-color);
  border-radius: 16px;
  margin-bottom: 22px;
}
.lesson-header-main { display: flex; align-items: center; gap: 18px; }
.lesson-page-icon { font-size: 44px; }
.lesson-cat {
  margin: 0 0 4px;
  font-size: 12px;
  color: var(--cat-color);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.lesson-header h1 { margin: 0 0 8px; font-size: 26px; }
.lesson-header .lesson-short { color: var(--text-dim); margin: 0; font-size: 15px; }

.lesson-block {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 26px;
  margin-bottom: 18px;
}
.lesson-block h2 { margin: 0 0 14px; font-size: 17px; }
.lesson-rule {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-line;
}

.examples-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.example {
  padding: 14px 16px;
  background: var(--bg-3);
  border-left: 3px solid var(--cat-color);
  border-radius: 8px;
}
.example-en { margin: 0; font-weight: 600; color: var(--text); }
.example-fr { margin: 4px 0 0; color: var(--text-dim); font-size: 13.5px; font-style: italic; }

.pitfall-block { border-left: 3px solid var(--warn); }
.pitfall-list { padding: 0 0 0 18px; margin: 0; color: var(--text); }
.pitfall-list li { padding: 4px 0; }

/* ===== Exercises block (inline on lesson page) ===== */
.exercises-block { border-left: 3px solid var(--good); }
.exercise-card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 12px;
}
.exercise-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.exercise-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.exercise-prompt { font-size: 16px; font-weight: 500; margin: 0 0 14px; }
.exercise-choices { display: grid; gap: 8px; }
.exercise-choice {
  padding: 10px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  cursor: pointer;
  text-align: left;
  transition: all .12s;
}
.exercise-choice:hover { border-color: var(--accent); background: var(--panel-strong); }
.exercise-choice.correct { border-color: var(--good); background: color-mix(in srgb, var(--good) 12%, transparent); }
.exercise-choice.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, transparent); }
.exercise-choice:disabled { cursor: default; }

.exercise-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
}
.exercise-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,189,248,0.18); }
.exercise-input.correct { border-color: var(--good); }
.exercise-input.wrong { border-color: var(--bad); }

.exercise-actions { display: flex; gap: 10px; margin-top: 10px; align-items: center; }
.exercise-submit {
  padding: 8px 16px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}
.exercise-feedback {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  display: none;
}
.exercise-feedback.show { display: block; }
.exercise-feedback.good { background: color-mix(in srgb, var(--good) 14%, transparent); color: #86efac; border-left: 3px solid var(--good); }
.exercise-feedback.bad { background: color-mix(in srgb, var(--bad) 14%, transparent); color: #fca5a5; border-left: 3px solid var(--bad); }

.lesson-cta { margin-top: 30px; text-align: center; }
.lesson-cta-btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  transition: transform .15s;
}
.lesson-cta-btn:hover { transform: translateY(-2px); }

/* ===== Quiz page ===== */
.quiz { max-width: 820px; margin: 0 auto; }
.quiz-header { margin-bottom: 26px; }
.quiz-header h1 { margin: 0 0 18px; font-size: 28px; }
.quiz-filter-group { margin-bottom: 14px; }
.quiz-filter-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-mute);
  margin-bottom: 6px;
}
.quiz-modes { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.quiz-level-pill { font-weight: 600; }
.quiz-level-pill .level-count { color: var(--text-mute); font-size: 11px; font-weight: 400; }
.quiz-level-pill[data-level="A1"]:has(input:checked) { --cat-color: #4ade80; }
.quiz-level-pill[data-level="A2"]:has(input:checked) { --cat-color: #22c55e; }
.quiz-level-pill[data-level="B1"]:has(input:checked) { --cat-color: #f59e0b; }
.quiz-level-pill[data-level="B2"]:has(input:checked) { --cat-color: #fb923c; }
.quiz-level-pill[data-level="C1"]:has(input:checked) { --cat-color: #ef4444; }

.quiz-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.quiz-level-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.5px;
}
.quiz-level-badge[data-level="A1"] { background: color-mix(in srgb, #4ade80 18%, transparent); color: #4ade80; }
.quiz-level-badge[data-level="A2"] { background: color-mix(in srgb, #22c55e 18%, transparent); color: #22c55e; }
.quiz-level-badge[data-level="B1"] { background: color-mix(in srgb, #f59e0b 18%, transparent); color: #fbbf24; }
.quiz-level-badge[data-level="B2"] { background: color-mix(in srgb, #fb923c 18%, transparent); color: #fb923c; }
.quiz-level-badge[data-level="C1"] { background: color-mix(in srgb, #ef4444 18%, transparent); color: #ef4444; }

.quiz-pct { color: var(--text-dim); font-size: 13px; font-weight: 500; }

.quiz-mode-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 13px;
  transition: all .12s;
}
.quiz-mode-pill:hover { color: var(--text); border-color: var(--border-strong); }
.quiz-mode-pill input { display: none; }
.quiz-mode-pill:has(input:checked) {
  border-color: var(--cat-color, var(--accent));
  background: color-mix(in srgb, var(--cat-color, var(--accent)) 15%, transparent);
  color: var(--text);
}

.quiz-score {
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: 14px;
  color: var(--text-dim);
}
.quiz-score strong { color: var(--good); font-size: 18px; }
.quiz-streak { color: var(--warn); font-weight: 600; }
.btn-mini {
  padding: 4px 10px;
  font-size: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
}
.btn-mini:hover { color: var(--text); border-color: var(--border-strong); }

.quiz-card {
  padding: 30px 32px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  min-height: 320px;
}
.quiz-cat {
  margin: 0 0 8px;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--accent);
}
.quiz-prompt {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.35;
}
.quiz-context {
  margin: 0 0 22px;
  color: var(--text-dim);
  font-size: 14px;
}
.quiz-choices { display: grid; gap: 10px; }
.quiz-choice {
  padding: 12px 16px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  font-size: 15px;
  cursor: pointer;
  text-align: left;
  transition: all .12s;
}
.quiz-choice:hover { border-color: var(--accent); }
.quiz-choice.correct { border-color: var(--good); background: color-mix(in srgb, var(--good) 14%, transparent); }
.quiz-choice.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 14%, transparent); }
.quiz-choice:disabled { cursor: default; }

.quiz-text-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  font-size: 16px;
}
.quiz-text-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,189,248,0.18); }
.quiz-text-input.correct { border-color: var(--good); background: color-mix(in srgb, var(--good) 8%, transparent); }
.quiz-text-input.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 8%, transparent); }

.quiz-feedback {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 14px;
  display: none;
  line-height: 1.55;
}
.quiz-feedback.show { display: block; }
.quiz-feedback.good { background: color-mix(in srgb, var(--good) 14%, transparent); color: #d6f5d6; border-left: 3px solid var(--good); }
.quiz-feedback.bad { background: color-mix(in srgb, var(--bad) 14%, transparent); color: #ffd5d5; border-left: 3px solid var(--bad); }
.quiz-feedback a { color: var(--accent); text-decoration: none; font-weight: 600; }
.quiz-feedback a:hover { text-decoration: underline; }

/* ===== Feedback diff (translation answers) ===== */
.fb-line { margin-top: 8px; }
.fb-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-mute);
  margin-right: 6px;
}
.fb-user, .fb-expected { font-weight: 500; color: var(--text); }
.fb-explanation {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
  color: var(--text-dim);
  font-size: 13px;
}
.fb-lesson-link { margin-top: 8px; font-size: 13px; }
mark.diff-bad {
  background: color-mix(in srgb, var(--bad) 28%, transparent);
  color: #fecaca;
  padding: 1px 4px;
  border-radius: 4px;
  text-decoration: line-through;
  text-decoration-color: var(--bad);
}
mark.diff-good {
  background: color-mix(in srgb, var(--good) 28%, transparent);
  color: #bbf7d0;
  padding: 1px 4px;
  border-radius: 4px;
  font-weight: 600;
}
.exercise-feedback .fb-explanation,
.exercise-feedback .fb-line,
.exercise-feedback .fb-lesson-link { margin-top: 8px; }

.btn-next {
  margin-top: 18px;
  padding: 11px 22px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 10px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn-next:hover { background: color-mix(in srgb, var(--accent) 80%, white); }

/* ===== Modal ===== */
.modal {
  position: fixed; inset: 0; z-index: 200;
  display: none;
  align-items: center; justify-content: center;
}
.modal.open { display: flex; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(2,6,18,0.75);
  backdrop-filter: blur(6px);
}
.modal-panel {
  position: relative;
  max-width: 760px; width: calc(100% - 32px);
  max-height: 88vh; overflow-y: auto;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  padding: 30px 32px 28px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
}
.modal-close {
  position: absolute; top: 14px; right: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 32px; height: 32px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
}
.modal-close:hover { color: var(--text); border-color: var(--border-strong); }
.m-header { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.m-icon { font-size: 38px; }
.m-title-block { flex: 1; }
.m-cat {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 6px;
}
.m-title-block h2 { margin: 0 0 4px; font-size: 22px; }
.m-short { color: var(--text-dim); font-size: 13.5px; margin: 4px 0 0; }
.m-level {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  font-weight: 700;
  font-size: 11px;
  margin-left: 8px;
}
.m-section { margin-top: 16px; }
.m-section h3 { font-size: 14px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; margin: 0 0 8px; }
.m-section p { margin: 0 0 8px; line-height: 1.65; white-space: pre-line; }
.m-section ul { margin: 0; padding-left: 18px; }
.m-section li { padding: 3px 0; }
.m-section .example-en { font-weight: 600; }
.m-section .example-fr { color: var(--text-dim); font-size: 13px; font-style: italic; }
.m-watch { margin-top: 18px; padding: 14px 16px; border-radius: 10px; background: color-mix(in srgb, var(--warn) 10%, transparent); border-left: 3px solid var(--warn); }
.m-watch h3 { margin: 0 0 6px; color: var(--warn); }

/* ===== Footer ===== */
.footer {
  display: flex;
  justify-content: space-between;
  padding: 20px 28px;
  max-width: 1400px;
  margin: 30px auto 0;
  font-size: 12px;
  color: var(--text-mute);
  border-top: 1px solid var(--border);
}

/* ===== Responsive ===== */
@media (max-width: 880px) {
  .topbar-inner { grid-template-columns: 1fr; gap: 12px; }
  .search-wrapper { min-width: 0; }
  .hero { grid-template-columns: 1fr; }
  .cat-head { grid-template-columns: 1fr; gap: 10px; }
  .quiz-card { padding: 22px 20px; }
}