/* Quiz-specific overrides — header/nav owned by ../styles.css */
:root {
  --paper: #faf8f3;
  --paper2: #f2eee4;
  --card: #fffdf9;
  --ink: #2d2d2d;
  --muted: #777063;
  --line: #e0d9c9;
  --line2: #cdc3ad;
  --teal: #0f5257;
  --gold: #b8860b;
  --green: #2e6f40;
  --green-bg: #e8f5ee;
  --red: #8b3a3a;
  --red-bg: #fdeaea;
  --teal-light: #e6f3f3;
  --serif: Georgia, 'Iowan Old Style', 'Noto Serif', serif;
  --radius: 4px;
}

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.app .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1.5rem;
  box-shadow: 0 18px 44px -30px rgba(50, 38, 12, 0.12);
}

.app .panel h2 {
  margin: 0 0 0.5rem;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
}

.app .panel .lead {
  color: var(--muted);
  margin: 0 0 1.25rem;
  font-family: var(--serif);
}

.app .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.app button {
  font-family: var(--serif);
  font-size: 0.94rem;
  padding: 0.65rem 1.1rem;
  border-radius: 3px;
  border: 1px solid var(--teal);
  background: var(--teal);
  color: #fff;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.app button:hover:not(:disabled) {
  background: #0c4145;
  border-color: #0c4145;
}

.app button.secondary {
  background: transparent;
  color: var(--teal);
}

.app button.secondary:hover:not(:disabled) {
  background: var(--paper2);
}

.app button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.app label.field {
  display: block;
  margin: 1rem 0 0.35rem;
  font-weight: 600;
  font-size: 0.9rem;
  font-family: var(--serif);
}

.app select {
  width: 100%;
  max-width: 420px;
  padding: 0.55rem 0.75rem;
  font-family: var(--serif);
  font-size: 0.95rem;
  border: 1px solid var(--line2);
  border-radius: 3px;
  background: var(--card);
  color: var(--ink);
}

.app .progress-wrap {
  margin-bottom: 1rem;
}

.app .progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  font-family: var(--serif);
}

.app .progress-bar {
  height: 8px;
  background: var(--line);
  border-radius: 3px;
  overflow: hidden;
}

.app .progress-fill {
  height: 100%;
  background: var(--teal);
  width: 0%;
  transition: width 0.25s ease;
}

.app .diagram-wrap {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.5rem;
  margin-bottom: 1rem;
  text-align: center;
}

.app .diagram-wrap img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.app .stem {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.45;
}

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

.app .tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  background: var(--teal-light);
  color: var(--teal);
  font-weight: 600;
  font-family: var(--serif);
}

.app .options {
  display: grid;
  gap: 0.65rem;
}

.app .option {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line2);
  border-radius: 5px;
  background: var(--card);
  cursor: pointer;
  text-align: left;
  width: 100%;
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}

.app .option:hover:not(.locked) {
  border-color: var(--teal);
  background: var(--teal-light);
}

.app .option .key {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.app .option.correct {
  border-color: var(--green);
  background: var(--green-bg);
}

.app .option.correct .key {
  background: var(--green);
}

.app .option.wrong {
  border-color: var(--red);
  background: var(--red-bg);
}

.app .option.wrong .key {
  background: var(--red);
}

.app .option.missed-correct {
  border-color: var(--green);
  background: var(--green-bg);
  opacity: 0.85;
}

.app .explain {
  margin-top: 1rem;
  padding: 1rem;
  border-left: 4px solid var(--gold);
  background: var(--paper2);
  border-radius: 0 5px 5px 0;
  font-size: 0.92rem;
  font-family: var(--serif);
  display: none;
}

.app .explain.visible {
  display: block;
}

.app .explain strong {
  color: var(--teal);
}

.app .nav-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

.app kbd {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  font-size: 0.8rem;
  border: 1px solid var(--line2);
  border-radius: 3px;
  background: var(--card);
  font-family: var(--serif);
}

.app .hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.75rem;
  font-family: var(--serif);
}

.app .end-score {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 500;
  color: var(--teal);
  margin: 0.5rem 0 1rem;
}

.app .review-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.app .review-list li {
  margin-bottom: 0.5rem;
}

.app .review-list button {
  width: 100%;
  text-align: left;
  background: var(--card);
  color: var(--ink);
  border-color: var(--line2);
  font-weight: 500;
}

.app .review-list button:hover {
  background: var(--teal-light);
  border-color: var(--teal);
  color: var(--teal);
}

@media (max-width: 700px) {
  nav.main a[href="downloads.html"],
  nav.main a[href="../downloads.html"],
  nav.main a[href="/downloads"] {
    display: block;
  }
}

@media (max-width: 600px) {
  nav.main a.hide-s:not(.on) {
    display: none;
  }

  .app {
    padding: 1rem 0.75rem 2rem;
  }
}

@media (pointer: coarse), (max-width: 700px) {
  .app .keys-hint {
    display: none;
  }
}