:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --surface-2: #eef1f0;
  --ink: #1b2320;
  --ink-soft: #566058;
  --border: #dde3e0;
  --primary: #a6122a;
  --primary-ink: #ffffff;
  --primary-soft: #fbe6ea;
  --gold: #b8860b;
  --green: #1e7d45;
  --green-soft: #e4f5ea;
  --amber: #b06a00;
  --amber-soft: #fdf0dc;
  --red: #b3261e;
  --red-soft: #fbe4e2;
  --radius: 1rem;
  --shadow: 0 6px 20px rgba(20, 30, 25, 0.08);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181a;
    --surface: #1d2224;
    --surface-2: #262c2e;
    --ink: #eef2ef;
    --ink-soft: #a6b0aa;
    --border: #333b3d;
    --primary: #e2455e;
    --primary-ink: #14181a;
    --primary-soft: #3a1a20;
    --gold: #d6a94a;
    --green: #4bbf7c;
    --green-soft: #163224;
    --amber: #e0a745;
    --amber-soft: #3a2c11;
    --red: #f0665e;
    --red-soft: #3a1917;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html {
  font-size: clamp(15px, 0.85vw + 10.5px, 30px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Noto Sans", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
}

body.lock-scroll {
  overflow: hidden;
  height: 100vh;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
  flex: 1 1 auto;
}

.app-header .btn-ghost {
  flex-shrink: 0;
  font-size: 0.85rem;
  padding: 0.5em 1em;
  white-space: nowrap;
}

.brand-mark { font-size: 1.8rem; line-height: 1; flex-shrink: 0; }

.brand-text { min-width: 0; }

.brand-text h1 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text p {
  margin: 0.1rem 0 0;
  font-size: 0.75rem;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 420px) {
  .brand-text h1 { font-size: 0.9rem; }
  .brand-text p { display: none; }
}

main#view-root {
  flex: 1;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}

@media (min-width: 1400px) {
  main#view-root {
    max-width: none;
    width: 94%;
    padding: 1.5rem 2rem 4rem;
  }
}

/* ---------- Buttons ---------- */
.btn {
  font: inherit;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.6em 1.3em;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.08s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--primary);
  color: var(--primary-ink);
}
.btn-primary:hover { box-shadow: var(--shadow); }
.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--surface-2); }

/* ---------- View titles ---------- */
.view-title {
  font-size: 1.5rem;
  margin: 0.5rem 0 0.25rem;
}
.view-subtitle {
  color: var(--ink-soft);
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

/* ---------- Package selection ---------- */
.package-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

@media (min-width: 1400px) {
  .package-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
  }
}

.package-card {
  font: inherit;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  box-shadow: var(--shadow);
  transition: transform 0.1s ease, border-color 0.15s ease;
  color: var(--ink);
}
.package-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.package-card:active { transform: translateY(0) scale(0.99); }

.package-label {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
}
.package-meta {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

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

/* Fit-mode: while a question is unanswered, the quiz view is locked to the
   available viewport height (no page scroll). JS shrinks --fit-scale until
   the question card's content fits without overflowing. Once answered,
   fit-mode is removed and normal scrolling returns so the explanation fits. */
.view-quiz.fit-mode {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.view-quiz.fit-mode .quiz-progress { flex: 0 0 auto; }
.view-quiz.fit-mode .question-card {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.view-quiz.fit-mode .question-card.overflowed { overflow-y: auto; }
.view-quiz.fit-mode .options-list { flex: 0 0 auto; }
.view-quiz.fit-mode .quiz-actions { flex: 0 0 auto; }

.quiz-progress { margin-bottom: 1rem; }

.progress-track {
  height: 0.5rem;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.25s ease;
}
.progress-info {
  display: flex;
  justify-content: space-between;
  margin-top: 0.4rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-weight: 600;
}

.question-card {
  --fit-scale: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: calc(1.5rem * var(--fit-scale));
  box-shadow: var(--shadow);
}

@media (min-width: 1400px) {
  .question-card { padding: calc(2.5rem * var(--fit-scale)); }
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: calc(1rem * var(--fit-scale));
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3em 0.8em;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.badge-category { background: var(--primary-soft); color: var(--primary); }
.badge-difficulty[data-level="Mudah"] { background: var(--green-soft); color: var(--green); }
.badge-difficulty[data-level="Sedang"] { background: var(--amber-soft); color: var(--amber); }
.badge-difficulty[data-level="Sukar"] { background: var(--red-soft); color: var(--red); }
.badge-points { background: var(--surface-2); color: var(--gold); }

.question-stimulus {
  font-size: calc(clamp(1rem, 0.4vw + 1rem, 1.7rem) * var(--fit-scale));
  line-height: 1.55;
  white-space: pre-line;
  margin: 0 0 calc(1.5rem * var(--fit-scale));
}

.options-list {
  display: grid;
  gap: calc(0.75rem * var(--fit-scale));
}

.option-btn {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  text-align: left;
  font: inherit;
  font-size: calc(clamp(0.95rem, 0.3vw + 0.9rem, 1.4rem) * var(--fit-scale));
  background: var(--surface-2);
  border: 2px solid transparent;
  border-radius: 0.85rem;
  padding: 0.9em 1.1em;
  cursor: pointer;
  color: var(--ink);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.option-btn:hover:not(:disabled) { border-color: var(--primary); }
.option-btn:disabled { cursor: default; }

.option-letter {
  flex-shrink: 0;
  width: 1.9em;
  height: 1.9em;
  border-radius: 50%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  border: 1px solid var(--border);
}

.option-text { flex: 1; padding-top: 0.15em; }

.option-btn.is-correct {
  background: var(--green-soft);
  border-color: var(--green);
}
.option-btn.is-correct .option-letter { background: var(--green); color: #fff; border-color: var(--green); }

.option-btn.is-wrong {
  background: var(--red-soft);
  border-color: var(--red);
}
.option-btn.is-wrong .option-letter { background: var(--red); color: #fff; border-color: var(--red); }

.explanation {
  margin-top: 1.5rem;
  padding: 1.1rem 1.3rem;
  border-radius: 0.85rem;
  background: var(--surface-2);
  border-left: 4px solid var(--primary);
}
.explanation-verdict {
  margin: 0 0 0.5rem;
  font-weight: 700;
  font-size: clamp(1rem, 0.3vw + 0.95rem, 1.3rem);
}
.explanation-verdict.correct { color: var(--green); }
.explanation-verdict.wrong { color: var(--red); }
.explanation-body {
  font-size: clamp(0.9rem, 0.25vw + 0.85rem, 1.15rem);
  color: var(--ink-soft);
  white-space: pre-line;
  line-height: 1.6;
}

.quiz-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.25rem;
}

/* ---------- Result ---------- */
.result-score {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem 0 2rem;
}
.score-ring {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  font-weight: 800;
  color: var(--primary);
}
.score-value { font-size: 3.5rem; }
.score-max { font-size: 1.3rem; color: var(--ink-soft); }
.score-label { color: var(--ink-soft); font-size: 1rem; }

.result-breakdown {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.85rem;
  margin-bottom: 2rem;
}
.breakdown-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}
.breakdown-card h3 {
  margin: 0 0 0.3rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-weight: 600;
}
.breakdown-card .val { font-size: 1.4rem; font-weight: 700; color: var(--primary); }

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.review-list { display: grid; gap: 1rem; }
.review-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
}
.review-item .q-head {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.review-item .q-num { font-weight: 700; color: var(--primary); }
.review-item .q-stimulus { margin: 0 0 0.6rem; font-size: 0.95rem; }
.review-item .q-answer { font-size: 0.9rem; }
.review-item .q-answer.correct { color: var(--green); }
.review-item .q-answer.wrong { color: var(--red); }

/* ---------- Utility ---------- */
[hidden] { display: none !important; }