/* Palette matches the live asadigital.co.in portfolio site (dark slate,
   orange accent, green success) so this subdomain reads as part of the
   same studio rather than a bolted-on separate product. */
:root {
  --c-bg: #0f172a;
  --c-card: #1e293b;
  --c-text: #f8fafc;
  --c-text-muted: #94a3b8;
  --c-border: rgba(255, 255, 255, 0.1);
  --c-accent: #f97316;
  --c-accent-soft: rgba(249, 115, 22, 0.14);
  --c-correct: #22c55e;
  --c-correct-bg: rgba(34, 197, 94, 0.14);
  --c-wrong: #f87171;
  --c-wrong-bg: rgba(248, 113, 113, 0.14);
  --font-heading: "Plus Jakarta Sans", -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, "Segoe UI", sans-serif;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .btn-primary, .score-msg, .logo-text {
  font-family: var(--font-heading);
}

.app {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 18px 64px;
}

/* ---------- studio bar (links back to the main site) ---------- */
.studio-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 0;
  margin: 0 -18px;
  padding-left: 18px;
  padding-right: 18px;
}
.studio-bar a.logo-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--c-text);
}
.studio-bar .logo-text {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.studio-bar .back-arrow {
  color: var(--c-text-muted);
  font-size: 0.95rem;
  transition: transform 0.15s;
}
.studio-bar a.logo-link:hover .back-arrow { transform: translateX(-3px); }
.studio-bar .app-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-accent);
  background: var(--c-accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- header ---------- */
.hero {
  margin: 0 -18px 28px;
  padding: 22px 18px 30px;
  border-bottom: 1px solid var(--c-border);
}
.hero-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--c-text-muted);
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.hero h1 {
  margin: 0 0 8px;
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--c-text);
}
.hero p {
  margin: 0;
  color: var(--c-text-muted);
  font-size: 1.02rem;
  max-width: 46ch;
}

/* ---------- cards / sections ---------- */
.card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 18px;
}
.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-muted);
  margin: 0 0 12px;
}

/* ---------- choice grids (class / topic / count) ---------- */
.choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 10px;
}
.choice-grid.wide { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }

.choice-btn {
  border: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 14px 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-text);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  text-align: center;
}
.choice-btn:hover { border-color: var(--c-accent); }
.choice-btn:active { transform: scale(0.97); }
.choice-btn.selected {
  border-color: var(--c-accent);
  background: var(--c-accent-soft);
  color: var(--c-text);
}
.choice-btn .sub {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--c-text-muted);
  margin-top: 2px;
}
.choice-btn.selected .sub { color: var(--c-accent); }

/* ---------- primary action ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--c-accent);
  color: #0f172a;
  border: none;
  border-radius: 12px;
  padding: 14px 22px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  box-shadow: 0 4px 16px rgba(249, 115, 22, 0.25);
  transition: opacity 0.15s, transform 0.1s;
}
.btn-primary:disabled { opacity: 0.35; cursor: not-allowed; box-shadow: none; }
.btn-primary:not(:disabled):active { transform: scale(0.99); }
.btn-primary:not(:disabled):hover { opacity: 0.92; }

.btn-secondary {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 11px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
}
.btn-secondary:hover { border-color: var(--c-accent); color: var(--c-accent); }

.btn-row { display: flex; gap: 10px; margin-top: 6px; }
.btn-row .btn-primary, .btn-row .btn-secondary { flex: 1; }

/* ---------- quiz screen ---------- */
.quiz-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.quiz-progress .bar {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}
.quiz-progress .fill {
  height: 100%;
  background: var(--c-accent);
  transition: width 0.25s ease;
}
.quiz-progress .count {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-text-muted);
  white-space: nowrap;
}

.topic-chip {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.question-text {
  font-size: 1.18rem;
  font-weight: 600;
  line-height: 1.5;
  margin: 0 0 20px;
  color: var(--c-text);
}

.option {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
  font-size: 0.98rem;
  color: var(--c-text);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.option:hover { border-color: var(--c-accent); }
.option .letter {
  flex: 0 0 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--c-text-muted);
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.option.chosen { border-color: var(--c-accent); background: var(--c-accent-soft); }
.option.chosen .letter { background: var(--c-accent); color: #0f172a; }

.option.correct { border-color: var(--c-correct); background: var(--c-correct-bg); }
.option.correct .letter { background: var(--c-correct); color: #0f172a; }
.option.incorrect { border-color: var(--c-wrong); background: var(--c-wrong-bg); }
.option.incorrect .letter { background: var(--c-wrong); color: #0f172a; }
.option:disabled { cursor: default; }

.explanation {
  font-size: 0.9rem;
  color: var(--c-text-muted);
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--c-accent);
  padding: 10px 14px;
  border-radius: 8px;
  margin: 14px 0 4px;
}

/* ---------- results ---------- */
.score-hero {
  text-align: center;
  padding: 10px 0 6px;
}
.score-ring {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: conic-gradient(var(--c-accent) calc(var(--pct) * 1%), rgba(255, 255, 255, 0.08) 0);
}
.score-ring .inner {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--c-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.score-ring .num { font-size: 1.6rem; font-weight: 800; color: var(--c-text); font-family: var(--font-heading); }
.score-ring .den { font-size: 0.78rem; color: var(--c-text-muted); }
.score-msg { font-size: 1.05rem; font-weight: 700; margin: 0 0 4px; color: var(--c-text); }
.score-sub { color: var(--c-text-muted); margin: 0; font-size: 0.92rem; }

.topic-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-border);
  font-size: 0.92rem;
}
.topic-row:last-child { border-bottom: none; }
.topic-row .name { font-weight: 600; }
.topic-row .score { color: var(--c-text-muted); }

.review-item { padding: 16px 0; border-bottom: 1px solid var(--c-border); }
.review-item:last-child { border-bottom: none; }
.review-item .q { font-weight: 600; margin: 0 0 10px; color: var(--c-text); }
.review-answer { font-size: 0.9rem; margin: 4px 0; display: flex; gap: 6px; }
.review-answer .tag { font-weight: 700; flex: 0 0 auto; }
.review-answer.correct .tag { color: var(--c-correct); }
.review-answer.incorrect .tag { color: var(--c-wrong); }

footer.site-footer {
  text-align: center;
  color: var(--c-text-muted);
  font-size: 0.82rem;
  margin-top: 32px;
  line-height: 1.7;
}
footer.site-footer a { color: var(--c-accent); text-decoration: none; }
footer.site-footer a:hover { text-decoration: underline; }

.hidden { display: none !important; }

@media (max-width: 420px) {
  .hero h1 { font-size: 1.55rem; }
  .choice-grid { grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); }
}