/* ============================================================
   Quiz Platform — design system
   Dark indigo/magenta base, playful motion, per-subject accents.
   ============================================================ */

:root {
  /* Palette, shape and motion tokens live in theme.css and are theme-aware.
     This block previously redeclared --bg/--surface/--text/--border with the
     v1 dark values; because style.css loads AFTER theme.css, that overwrote
     the light theme and left light mode rendering on a near-black ground.
     Only tokens theme.css does not own are declared here. */

  /* Subject accents — deliberately colourful, identical in both themes. */
  --subj-bm:       #f472b6;
  --subj-english:  #38bdf8;
  --subj-math:     #fbbf24;
  --subj-science:  #34d399;
  --subj-islamic:  #a78bfa;
  --subj-default:  var(--accent);

  /* v1 aliases kept so unported rules resolve to the live token set. */
  --bg-deep:       var(--bg);
  --surface-2:     var(--surface-hi);
  --magenta:       var(--accent);
  --magenta-hi:    var(--accent);
  --violet:        var(--accent-2);
  --violet-hi:     var(--accent-2);

  --r-sm:   var(--radius-sm);
  --r:      var(--radius);
  --r-lg:   var(--radius-lg);
  --r-pill: var(--radius-pill);

  --ease-out:    var(--ease);
  --ease-bounce: var(--ease);

  --shadow:    var(--shadow-soft);
  --shadow-lg: var(--shadow-raised);
  --glow:      var(--shadow-soft);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Outfit", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* The public (signed-out) pages keep a subtle tint — they are marketing, not
   working surfaces. Dashboards stay flat. */
body:has(.app-header) {
  /* Signed-out pages: plain neumorphic ground, no coloured glows. */
  background: var(--bg);
  background-attachment: fixed;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

a { color: var(--magenta-hi); text-decoration: none; }
a:hover { text-decoration: underline; }

button { font-family: inherit; }

/* ---------- Layout ---------- */

.wrap {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(13, 8, 32, 0.82);
  border-bottom: 1px solid var(--border);
}

.app-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
  color: var(--text);
}

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

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--violet), var(--magenta));
  box-shadow: var(--glow);
  font-size: 1.05rem;
}

.streak-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 15px;
  border-radius: var(--r-pill);
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 0.87rem;
  font-weight: 600;
  color: var(--text-muted);
}

.streak-chip strong { color: var(--gold); }

main { padding: 40px 0 96px; }

/* ---------- Hero ---------- */

.hero { text-align: center; margin-bottom: 44px; }

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 12px;
}

.hero h1 .accent {
  background: linear-gradient(120deg, var(--magenta-hi), var(--violet-hi));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 50ch;
  margin: 0 auto;
}

/* ---------- Quiz grid ---------- */

.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: 18px;
}

.quiz-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  cursor: pointer;
  overflow: hidden;
  text-align: left;
  color: inherit;
  transition: transform 0.32s var(--ease-out), border-color 0.32s var(--ease-out),
              box-shadow 0.32s var(--ease-out);
  animation: card-in 0.5s var(--ease-out) backwards;
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

.quiz-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent, var(--subj-default));
  opacity: 0.85;
}

.quiz-card::after {
  content: "";
  position: absolute;
  width: 190px;
  height: 190px;
  right: -70px;
  top: -70px;
  border-radius: 50%;
  background: var(--accent, var(--subj-default));
  opacity: 0.09;
  transition: opacity 0.32s var(--ease-out), transform 0.32s var(--ease-out);
}

.quiz-card:hover,
.quiz-card:focus-visible {
  transform: translateY(-5px);
  border-color: var(--border-hi);
  box-shadow: var(--shadow-lg);
  outline: none;
}

.quiz-card:hover::after,
.quiz-card:focus-visible::after {
  opacity: 0.17;
  transform: scale(1.12);
}

.quiz-card-top {
  display: flex;
  align-items: center;
  gap: 11px;
  position: relative;
}

.subject-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  font-size: 1.25rem;
  background: color-mix(in srgb, var(--accent, var(--subj-default)) 18%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent, var(--subj-default)) 35%, transparent);
  flex-shrink: 0;
}

.quiz-card h3 {
  font-size: 1.12rem;
  position: relative;
}

.quiz-card .subject-name {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent, var(--subj-default));
}

.quiz-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  position: relative;
}

.tag {
  padding: 4px 11px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.quiz-card-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 4px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--accent, var(--subj-default));
  position: relative;
}

.quiz-card-cta .arrow {
  transition: transform 0.32s var(--ease-bounce);
}

.quiz-card:hover .quiz-card-cta .arrow { transform: translateX(5px); }

/* ---------- Quiz player ---------- */

.player { max-width: 780px; margin: 0 auto; }

.player-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.progress-track {
  flex: 1;
  height: 9px;
  border-radius: var(--r-pill);
  background: var(--surface-2);
  border: 1px solid var(--border);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--violet), var(--magenta));
  transition: width 0.5s var(--ease-out);
}

.progress-count {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.question-card {
  padding: 32px;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  animation: q-in 0.42s var(--ease-out);
}

@keyframes q-in {
  from { opacity: 0; transform: translateX(26px) scale(0.98); }
  to   { opacity: 1; transform: none; }
}

.q-difficulty {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.q-difficulty.easy   { background: rgba(52, 211, 153, 0.16); color: var(--correct); }
.q-difficulty.medium { background: rgba(251, 191, 36, 0.16); color: var(--gold); }
.q-difficulty.hard   { background: rgba(251, 113, 133, 0.16); color: var(--wrong); }

.question-text {
  font-size: 1.32rem;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 26px;
}

.options { display: grid; gap: 11px; }

.option {
  display: flex;
  align-items: center;
  gap: 15px;
  width: 100%;
  min-height: 60px;
  padding: 15px 19px;
  border-radius: var(--r);
  background: var(--surface-hi);
  border: 2px solid var(--border);
  color: var(--text);
  font-size: 1rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: transform 0.18s var(--ease-out), border-color 0.18s var(--ease-out),
              background 0.18s var(--ease-out);
}

.option:hover:not(:disabled) {
  border-color: var(--violet);
  background: #32266d;
  transform: translateX(4px);
}

.option:focus-visible {
  outline: 2px solid var(--magenta-hi);
  outline-offset: 3px;
}

.option:disabled { cursor: default; }

.option-key {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border-hi);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.option.selected {
  border-color: var(--magenta);
  background: rgba(217, 70, 176, 0.14);
}

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

.option.is-correct {
  border-color: var(--correct);
  background: var(--correct-bg);
  animation: pop 0.42s var(--ease-bounce);
}

.option.is-correct .option-key {
  background: var(--correct);
  border-color: var(--correct);
  color: #06281c;
}

.option.is-wrong {
  border-color: var(--wrong);
  background: var(--wrong-bg);
  animation: shake 0.42s ease;
}

.option.is-wrong .option-key {
  background: var(--wrong);
  border-color: var(--wrong);
  color: #3d0713;
}

@keyframes pop {
  0%   { transform: scale(1); }
  45%  { transform: scale(1.035); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100%   { transform: translateX(0); }
  20%, 60%   { transform: translateX(-7px); }
  40%, 80%   { transform: translateX(7px); }
}

/* ---------- Explanation ---------- */

.explain {
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: var(--r);
  border-left: 3px solid var(--violet);
  background: rgba(139, 92, 246, 0.1);
  animation: fade-up 0.4s var(--ease-out);
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.explain-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.79rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--violet-hi);
  margin-bottom: 7px;
}

.explain p { margin: 0; color: var(--text-muted); font-size: 0.96rem; }

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 13px 28px;
  border: none;
  border-radius: var(--r-pill);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s var(--ease-bounce), box-shadow 0.2s var(--ease-out),
              filter 0.2s var(--ease-out);
}

.btn-primary {
  background: linear-gradient(120deg, var(--violet), var(--magenta));
  color: #fff;
  box-shadow: 0 6px 22px rgba(217, 70, 176, 0.34);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 10px 30px rgba(217, 70, 176, 0.44);
}

.btn-ghost {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.btn-ghost:hover:not(:disabled) {
  border-color: var(--border-hi);
  color: var(--text);
  transform: translateY(-2px);
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--magenta-hi); outline-offset: 3px; }

.player-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- Results ---------- */

.results { text-align: center; animation: fade-up 0.5s var(--ease-out); }

.score-ring {
  position: relative;
  width: 168px;
  height: 168px;
  margin: 0 auto 22px;
}

.score-ring svg { transform: rotate(-90deg); }

.score-ring .ring-bg   { stroke: var(--surface-hi); }
.score-ring .ring-fill {
  stroke: url(#scoreGrad);
  stroke-linecap: round;
  transition: stroke-dashoffset 1.15s var(--ease-out);
}

.score-ring-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
}

.score-pct {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.score-frac {
  font-size: 0.87rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 5px;
}

.results h2 { font-size: 1.85rem; margin-bottom: 8px; }
.results .verdict { color: var(--text-muted); margin: 0 0 28px; }

.review-list {
  display: grid;
  gap: 11px;
  text-align: left;
  margin-bottom: 28px;
}

.review-item {
  display: flex;
  gap: 13px;
  padding: 16px 18px;
  border-radius: var(--r);
  background: var(--surface);
  border: 1px solid var(--border);
}

.review-mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: 50%;
  font-size: 0.82rem;
  font-weight: 800;
}

.review-item.ok  .review-mark { background: var(--correct-bg); color: var(--correct); }
.review-item.bad .review-mark { background: var(--wrong-bg);   color: var(--wrong); }

.review-q { font-weight: 600; margin: 0 0 6px; font-size: 0.97rem; }

.review-a {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.review-a .ans-correct { color: var(--correct); font-weight: 600; }
.review-a .ans-wrong   { color: var(--wrong);   font-weight: 600; }

.results-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Confetti ---------- */

.confetti {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  overflow: hidden;
}

.confetti span {
  position: absolute;
  width: 9px;
  height: 15px;
  opacity: 0;
  animation: fall 2.6s ease-in forwards;
}

@keyframes fall {
  0%   { opacity: 1; transform: translateY(-12vh) rotate(0deg); }
  100% { opacity: 0; transform: translateY(105vh) rotate(680deg); }
}

/* ---------- States ---------- */

.state {
  text-align: center;
  padding: 64px 20px;
  color: var(--text-muted);
}

.state-icon { font-size: 2.6rem; margin-bottom: 12px; }
.state h3 { margin-bottom: 8px; color: var(--text); }

.state.error {
  max-width: 560px;
  margin: 0 auto;
  border: 1px solid rgba(251, 113, 133, 0.35);
  background: var(--wrong-bg);
  border-radius: var(--r-lg);
}

.skeleton {
  height: 178px;
  border-radius: var(--r-lg);
  background: linear-gradient(100deg, var(--surface) 30%, var(--surface-hi) 50%, var(--surface) 70%);
  background-size: 220% 100%;
  animation: shimmer 1.4s infinite linear;
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

.hidden { display: none !important; }

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

@media (max-width: 640px) {
  main { padding: 26px 0 72px; }
  .question-card { padding: 22px; }
  .question-text { font-size: 1.14rem; }
  .grid { grid-template-columns: 1fr; }
  .player-actions { flex-direction: column-reverse; }
  .player-actions .btn { width: 100%; }
  .score-ring { width: 142px; height: 142px; }
  .score-pct { font-size: 2.2rem; }
}

/* ---------- Accessibility ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .confetti { display: none; }
}

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