/* ICC Fire Plan Examiner Practice — UI */
:root {
  --bg: #0f1419;
  --bg-elevated: #1a2332;
  --bg-card: #1e2a3a;
  --bg-hover: #243447;
  --border: #2d3f56;
  --text: #e8eef4;
  --text-muted: #8b9cb3;
  --accent: #e85d04;
  --accent-hover: #f48c06;
  --accent-soft: rgba(232, 93, 4, 0.15);
  --success: #2a9d8f;
  --success-soft: rgba(42, 157, 143, 0.18);
  --danger: #e63946;
  --danger-soft: rgba(230, 57, 70, 0.18);
  --warning: #e9c46a;
  --info: #4ea8de;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "Consolas", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(232, 93, 4, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(42, 157, 143, 0.06), transparent);
}

/* Layout */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: rgba(26, 35, 50, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #9d0208);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(232, 93, 4, 0.35);
}

.brand h1 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand p {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.badge.timer {
  font-family: var(--mono);
  color: var(--warning);
  border-color: rgba(233, 196, 106, 0.35);
}

.badge.timer.warn {
  color: var(--danger);
  border-color: rgba(230, 57, 70, 0.45);
  animation: pulse 1s ease infinite;
}

@keyframes pulse {
  50% { opacity: 0.7; }
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

/* Screens */
.screen {
  display: none;
  animation: fadeIn 0.25s ease;
}

.screen.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* Home */
.hero {
  text-align: center;
  margin-bottom: 2rem;
  padding: 1.5rem 0 0.5rem;
}

.hero h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero p {
  margin: 0 auto;
  max-width: 36rem;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.stat-card .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-hover);
}

.stat-card .label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.2rem;
}

.mode-grid {
  display: grid;
  gap: 0.85rem;
}

.mode-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  text-align: left;
  width: 100%;
  padding: 1.15rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: inherit;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.12s;
  font: inherit;
}

.mode-card:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.mode-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mode-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.mode-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}

.mode-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.domain-panel {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: none;
}

.domain-panel.open {
  display: block;
}

.domain-panel h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.domain-list {
  display: grid;
  gap: 0.5rem;
}

.domain-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.domain-btn:hover {
  border-color: var(--info);
  background: var(--bg-hover);
}

.domain-btn .weight {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--mono);
}

.refs {
  margin-top: 2rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.refs strong {
  color: var(--text);
}

.refs ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.disclaimer {
  margin-top: 1rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  opacity: 0.9;
}

/* Quiz */
.quiz-progress {
  margin-bottom: 1.25rem;
}

.progress-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.progress-bar {
  height: 6px;
  background: var(--bg-card);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 999px;
  transition: width 0.25s ease;
  width: 0%;
}

.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.q-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.tag.domain-administration { color: #90e0ef; border-color: rgba(144, 224, 239, 0.3); }
.tag.domain-occupancy { color: #b8f2e6; border-color: rgba(184, 242, 230, 0.3); }
.tag.domain-hazardous_materials { color: #ffc6ff; border-color: rgba(255, 198, 255, 0.3); }
.tag.domain-fire_protection { color: #ffba08; border-color: rgba(255, 186, 8, 0.35); }
.tag.domain-egress { color: #80ed99; border-color: rgba(128, 237, 153, 0.3); }
.tag.difficulty-hard { color: var(--danger); }

.stem {
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0 0 1.25rem;
  line-height: 1.55;
}

.choices {
  display: grid;
  gap: 0.65rem;
}

.choice {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  width: 100%;
  text-align: left;
  padding: 0.9rem 1rem;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.choice:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--bg-hover);
}

.choice:disabled {
  cursor: default;
}

.choice .letter {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
  color: var(--text-muted);
}

.choice .choice-text {
  flex: 1;
  padding-top: 0.15rem;
  font-size: 0.95rem;
}

.choice.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.choice.correct {
  border-color: var(--success);
  background: var(--success-soft);
}

.choice.correct .letter {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.choice.incorrect {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.choice.incorrect .letter {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.feedback {
  display: none;
  margin-top: 1.25rem;
  padding: 1.1rem 1.2rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  animation: fadeIn 0.2s ease;
}

.feedback.show {
  display: block;
}

.feedback.ok {
  background: var(--success-soft);
  border-color: rgba(42, 157, 143, 0.45);
}

.feedback.bad {
  background: var(--danger-soft);
  border-color: rgba(230, 57, 70, 0.45);
}

.feedback h4 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.feedback p {
  margin: 0 0 0.65rem;
  font-size: 0.92rem;
  color: var(--text);
}

.feedback .ref {
  font-size: 0.85rem;
  color: var(--info);
  font-family: var(--mono);
  padding: 0.5rem 0.65rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 6px;
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.25rem;
  justify-content: space-between;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.btn:hover {
  background: var(--bg-hover);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #d00000);
  border-color: transparent;
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--accent-hover), var(--accent));
}

.btn-ghost {
  background: transparent;
}

.btn-danger {
  border-color: rgba(230, 57, 70, 0.4);
  color: #ff8a93;
}

/* Results */
.results-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.score-ring {
  width: 140px;
  height: 140px;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--success) var(--p, 0%), var(--bg-elevated) 0);
  position: relative;
}

.score-ring::before {
  content: "";
  position: absolute;
  inset: 10px;
  background: var(--bg-card);
  border-radius: 50%;
}

.score-ring .score-inner {
  position: relative;
  z-index: 1;
}

.score-ring .pct {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

.score-ring .sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.results-card h2 {
  margin: 0 0 0.35rem;
}

.results-card .verdict {
  color: var(--text-muted);
  margin: 0 0 1.5rem;
}

.domain-breakdown {
  text-align: left;
  margin: 1.5rem 0;
  padding: 1rem;
  background: var(--bg-elevated);
  border-radius: 10px;
  border: 1px solid var(--border);
}

.domain-breakdown h3 {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}

.breakdown-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.55rem;
  font-size: 0.88rem;
}

.breakdown-bar {
  grid-column: 1 / -1;
  height: 5px;
  background: var(--bg-card);
  border-radius: 999px;
  overflow: hidden;
}

.breakdown-bar span {
  display: block;
  height: 100%;
  background: var(--info);
  border-radius: 999px;
}

.review-list {
  text-align: left;
  margin-top: 1.5rem;
}

.review-list h3 {
  font-size: 0.95rem;
  margin: 0 0 0.75rem;
}

.review-item {
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.5rem;
  background: var(--bg-elevated);
  font-size: 0.88rem;
}

.review-item.wrong {
  border-left: 3px solid var(--danger);
}

.review-item.right {
  border-left: 3px solid var(--success);
}

.review-item .q-stem {
  margin-bottom: 0.35rem;
  color: var(--text);
}

.review-item .detail {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* Modal */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 200;
  place-items: center;
  padding: 1rem;
}

.modal-backdrop.open {
  display: grid;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow);
}

.modal h3 {
  margin: 0 0 0.5rem;
}

.modal p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* Utilities */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 560px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .brand h1 {
    font-size: 0.95rem;
  }

  .question-card {
    padding: 1.15rem;
  }

  .quiz-actions {
    flex-direction: column;
  }

  .quiz-actions .btn {
    width: 100%;
  }
}