/* PassMate UK - Main Stylesheet
   Aesthetic: GOV.UK meets fintech - Navy/White/Yellow
   Mobile-first, dark-mode ready, accessible
*/

/* ── Fonts ─────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,600;0,9..40,700;1,9..40,400&family=Syne:wght@600;700;800&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  --navy:       #0b1f3a;
  --navy-mid:   #122a4e;
  --navy-light: #1a3560;
  --yellow:     #f5c842;
  --yellow-dim: #e0b530;
  --white:      #ffffff;
  --off-white:  #f4f6f8;
  --grey-100:   #e8edf2;
  --grey-300:   #b0bec5;
  --grey-500:   #607080;
  --grey-700:   #334155;
  --success:    #00875a;
  --success-bg: #e6f5ef;
  --error:      #d32f2f;
  --error-bg:   #fde8e8;
  --warning:    #e67e00;
  --warning-bg: #fff4e5;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,.12);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.18);
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --transition: 200ms ease;

  /* Semantic */
  --bg:         var(--off-white);
  --surface:    var(--white);
  --text:       var(--navy);
  --text-muted: var(--grey-500);
  --border:     var(--grey-100);
  --accent:     var(--yellow);
  --accent-dim: var(--yellow-dim);
  --nav-bg:     var(--navy);
  --nav-text:   var(--white);
}

/* ── Dark Mode ─────────────────────────────────────────────── */
[data-theme="dark"] {
  --bg:         #0d1b2e;
  --surface:    #122a4e;
  --text:       #e8f0f8;
  --text-muted: #8fafc8;
  --border:     #1a3560;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.3);
  --shadow-md:  0 4px 16px rgba(0,0,0,.4);
  --nav-bg:     #081526;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:         #0d1b2e;
    --surface:    #122a4e;
    --text:       #e8f0f8;
    --text-muted: #8fafc8;
    --border:     #1a3560;
    --shadow-sm:  0 1px 3px rgba(0,0,0,.3);
    --shadow-md:  0 4px 16px rgba(0,0,0,.4);
    --nav-bg:     #081526;
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  transition: background var(--transition), color var(--transition);
}

img { max-width: 100%; display: block; }
a { color: var(--yellow); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: inherit; }

h1, h2, h3, h4 {
  font-family: 'Syne', system-ui, sans-serif;
  line-height: 1.2;
  color: var(--text);
}

/* ── Layout ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}

.container--wide { max-width: 1100px; }
.container--narrow { max-width: 560px; }

main { flex: 1; padding-bottom: 40px; }

/* ── Navigation ────────────────────────────────────────────── */
.nav {
  background: var(--nav-bg);
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.nav-logo .logo-accent { color: var(--yellow); }

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active { color: var(--white); background: rgba(255,255,255,.1); }

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

.btn-theme {
  background: none;
  border: 1px solid rgba(255,255,255,.25);
  color: var(--white);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background var(--transition);
}

.btn-theme:hover { background: rgba(255,255,255,.1); }

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 64px 16px 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -60px; left: -60px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(245,200,66,.12) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -80px; right: -40px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(245,200,66,.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-badge {
  display: inline-block;
  background: rgba(245,200,66,.15);
  border: 1px solid rgba(245,200,66,.3);
  color: var(--yellow);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3.2rem);
  color: var(--white);
  margin-bottom: 16px;
}

.hero h1 span { color: var(--yellow); }

.hero-sub {
  font-size: 1.1rem;
  opacity: .85;
  max-width: 480px;
  margin: 0 auto 32px;
}

/* ── Stats Bar ─────────────────────────────────────────────── */
.stats-bar {
  background: var(--yellow);
  color: var(--navy);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  font-weight: 600;
  font-size: 0.875rem;
}

.stats-bar .stat { display: flex; align-items: center; gap: 6px; }
.stats-bar .stat-num { font-family: 'Syne', sans-serif; font-size: 1.1rem; }

/* ── Cards Grid ────────────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin: 32px 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  display: block;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--yellow);
  text-decoration: none;
}

.card-icon { font-size: 2rem; margin-bottom: 12px; }
.card-label { font-family: 'Syne', sans-serif; font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.card-sub { font-size: 0.825rem; color: var(--text-muted); }

.card--primary {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}
.card--primary .card-sub { color: rgba(255,255,255,.7); }
.card--primary:hover { border-color: var(--yellow); }

.card-accent {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.card:hover .card-accent { transform: scaleX(1); }

/* ── Progress Ring ─────────────────────────────────────────── */
.progress-ring-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.progress-ring circle {
  fill: none;
  stroke-width: 4;
  stroke-linecap: round;
  transition: stroke-dashoffset 600ms ease;
}

.progress-ring .track { stroke: var(--border); }
.progress-ring .fill { stroke: var(--yellow); }

.progress-ring-label {
  position: absolute;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text);
}

/* ── Category Cards ────────────────────────────────────────── */
.cat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--text);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.cat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--yellow);
  text-decoration: none;
}

.cat-card-icon { font-size: 1.8rem; flex-shrink: 0; }
.cat-card-info { flex: 1; min-width: 0; }
.cat-card-name { font-family: 'Syne', sans-serif; font-weight: 700; font-size: 0.95rem; }
.cat-card-meta { font-size: 0.8rem; color: var(--text-muted); }

.cat-score {
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.cat-score.good { color: var(--success); }
.cat-score.mid { color: var(--warning); }
.cat-score.bad { color: var(--error); }
.cat-score.none { color: var(--text-muted); }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
  min-height: 48px;
  text-decoration: none;
}

.btn:hover { text-decoration: none; }

.btn.primary {
  background: var(--yellow);
  color: var(--navy);
  border-color: var(--yellow);
}
.btn.primary:hover { background: var(--yellow-dim); border-color: var(--yellow-dim); box-shadow: 0 4px 12px rgba(245,200,66,.3); }

.btn.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn.secondary:hover { background: var(--bg); border-color: var(--grey-300); }

.hero .btn.secondary {
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}
.hero .btn.secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
}

.btn.ghost {
  background: transparent;
  color: var(--yellow);
  border-color: transparent;
  padding: 12px 16px;
}
.btn.ghost:hover { background: rgba(245,200,66,.1); }

.btn.danger {
  background: transparent;
  color: var(--error);
  border-color: var(--error);
}
.btn.danger:hover { background: var(--error-bg); }

.btn-group { display: flex; gap: 12px; flex-wrap: wrap; }

/* ── Quiz Page ──────────────────────────────────────────────── */
.quiz-layout {
  padding: 24px 0 40px;
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.875rem;
}

.quiz-breadcrumb { color: var(--text-muted); font-weight: 600; }
.quiz-count { color: var(--text-muted); }

.progress-bar-wrap {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 24px;
}

.progress-bar {
  height: 100%;
  background: var(--yellow);
  border-radius: 100px;
  transition: width 400ms ease;
}

.question-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}

.question-text {
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.55;
  margin-bottom: 24px;
  color: var(--text);
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: left;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  min-height: 52px;
  width: 100%;
  color: var(--text);
  position: relative;
}

.option-btn:hover:not(:disabled) {
  border-color: var(--yellow);
  background: var(--surface);
  transform: translateX(3px);
}

.option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--border);
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
  color: var(--text-muted);
}

.option-btn.correct {
  border-color: var(--success);
  background: var(--success-bg);
  color: var(--success);
  animation: answerReveal 400ms ease forwards;
}
.option-btn.correct .option-letter {
  background: var(--success);
  color: white;
}

.option-btn.incorrect {
  border-color: var(--error);
  background: var(--error-bg);
  color: var(--error);
  animation: answerShake 500ms ease forwards;
}
.option-btn.incorrect .option-letter {
  background: var(--error);
  color: white;
}

/* ── Answer Animations ─────────────────────────────── */
@keyframes answerReveal {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.03); }
  100% { transform: scale(1); }
}

@keyframes answerShake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

/* Keyboard shortcut hint labels */
.option-btn::after {
  content: attr(data-letter);
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--grey-300);
  opacity: 0.5;
  pointer-events: none;
}

/* Correct answer flash */
.option-btn.correct::after { color: var(--success); opacity: 0.7; }
.option-btn.incorrect::after { color: var(--error); opacity: 0.7; }

/* ── Explanation Panel ─────────────────────────────────────── */
.explanation-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-height: 0;
  transition: max-height 400ms ease, opacity 400ms ease;
  opacity: 0;
  box-shadow: var(--shadow-sm);
}

.explanation-panel.hidden { display: none; }
.explanation-panel.visible { max-height: 500px; opacity: 1; display: block; }

.explanation-inner { padding: 20px 24px; }

.explanation-result {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 10px;
}
.explanation-result.correct { color: var(--success); }
.explanation-result.incorrect { color: var(--error); }

.explanation-text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.hc-rule {
  font-size: 0.825rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  display: inline-block;
}

.explanation-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-bookmark {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  min-height: 40px;
}
.btn-bookmark:hover, .btn-bookmark.active {
  background: rgba(245,200,66,.1);
  border-color: var(--yellow);
  color: var(--yellow-dim);
}

.btn-next {
  margin-left: auto;
  background: var(--yellow);
  color: var(--navy);
  border: none;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  min-height: 44px;
  transition: background var(--transition), box-shadow var(--transition);
}
.btn-next:hover { background: var(--yellow-dim); box-shadow: 0 4px 12px rgba(245,200,66,.3); }

/* ── Timer ─────────────────────────────────────────────────── */
.timer {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Syne', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.timer.warning { color: var(--warning); }
.timer.critical { color: var(--error); animation: pulse 1s infinite; }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .6; } }

/* ── Results Page ──────────────────────────────────────────── */
.results-hero {
  text-align: center;
  padding: 48px 16px 32px;
}

.score-circle {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 8px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  position: relative;
  transition: border-color 800ms ease;
}

.score-circle.pass { border-color: var(--success); }
.score-circle.fail { border-color: var(--error); }

.score-number {
  font-family: 'Syne', sans-serif;
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
}

.score-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 600; }

.pass-badge {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 100px;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 16px;
  letter-spacing: .03em;
}
.pass-badge.pass { background: var(--success-bg); color: var(--success); }
.pass-badge.fail { background: var(--error-bg); color: var(--error); }

/* ── Category Breakdown Table ──────────────────────────────── */
.breakdown-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 16px 0;
}

.breakdown-table th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.breakdown-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

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

.mini-bar-wrap {
  width: 80px;
  height: 6px;
  background: var(--border);
  border-radius: 100px;
  overflow: hidden;
}
.mini-bar {
  height: 100%;
  border-radius: 100px;
  background: var(--yellow);
  transition: width 600ms ease;
}
.mini-bar.good { background: var(--success); }
.mini-bar.mid { background: var(--warning); }
.mini-bar.bad { background: var(--error); }

/* ── Dashboard ─────────────────────────────────────────────── */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.stat-card-num {
  font-family: 'Syne', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--yellow);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-card-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 600; }

/* ── Section ─────────────────────────────────────────────────── */
.section { margin: 32px 0; }
.section-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

/* ── Filter Pills ─────────────────────────────────────────── */
.filter-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.pill {
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.825rem;
  font-weight: 600;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  min-height: 36px;
}

.pill:hover, .pill.active {
  border-color: var(--yellow);
  background: rgba(245,200,66,.1);
  color: var(--navy);
}

[data-theme="dark"] .pill:hover,
[data-theme="dark"] .pill.active {
  color: var(--yellow);
}

/* ── Modal ─────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.show { opacity: 1; pointer-events: all; }

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  max-width: 380px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  transform: translateY(16px);
  transition: transform var(--transition);
}

.modal-overlay.show .modal { transform: translateY(0); }
.modal h3 { margin-bottom: 12px; }
.modal p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* ── Toast ──────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--navy);
  color: var(--white);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  transition: transform 300ms ease;
  white-space: nowrap;
}

.toast.show { transform: translateX(-50%) translateY(0); }

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,.6);
  padding: 24px 16px;
  text-align: center;
  font-size: 0.8rem;
  margin-top: auto;
}

.footer a { color: rgba(255,255,255,.8); }
.footer a:hover { color: var(--yellow); }

/* ── Utilities ──────────────────────────────────────────────── */
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-yellow { color: var(--yellow); }
.font-bold { font-weight: 700; }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.pt-24 { padding-top: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }

/* ── Animations ─────────────────────────────────────────────── */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes countUp {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.anim-slide { animation: slideIn 300ms ease forwards; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 600px) {
  .nav-links { display: none; }

  .hero { padding: 40px 16px 48px; }

  .cards-grid { grid-template-columns: 1fr 1fr; gap: 12px; }

  .stat-cards { grid-template-columns: 1fr 1fr; }

  .question-card { padding: 20px 16px; }

  .question-text { font-size: 1rem; }

  .option-btn { padding: 12px 14px; }

  .explanation-actions { flex-direction: column; }
  .btn-next { margin-left: 0; width: 100%; justify-content: center; }

  .breakdown-table .hide-mobile { display: none; }

  .btn-group { flex-direction: column; }
  .btn-group .btn { justify-content: center; }
}

@media (min-width: 601px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .cards-grid { grid-template-columns: repeat(4, 1fr); }

  .quiz-layout { padding: 32px 0 60px; }
}

/* ── Accessibility ──────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 2px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* High contrast colours remain accessible (WCAG AA):
   Navy #0b1f3a on white: 14.7:1 ✓
   Yellow #f5c842 on navy #0b1f3a: 9.4:1 ✓
   White on navy: 15.8:1 ✓
*/