/* Y11 → Y12 Bridging hub */

.bridge-page {
  max-width: 900px;
}

/* ── Hero ─────────────────────────────────────────── */
.bridge-hero {
  text-align: center;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.bridge-free-note,
.bridge-usage-banner {
  text-align: center;
  color: var(--color-text-medium);
  background: var(--color-card-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 0.85) var(--spacing-unit);
  max-width: 640px;
  margin: var(--spacing-unit) auto 0;
  font-size: 0.95rem;
}

.bridge-free-note i {
  color: var(--color-primary);
  margin-right: 0.35rem;
}

.bridge-free-note a {
  color: var(--color-primary);
  font-weight: 600;
}

/* ── Breadcrumb ───────────────────────────────────── */
.bridge-breadcrumb {
  font-size: 0.9rem;
  color: var(--color-text-medium);
  margin-bottom: 0.25rem;
}

.bridge-breadcrumb a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.bridge-breadcrumb a:hover { text-decoration: underline; }

/* ── Category grid (hub) ──────────────────────────── */
.bridge-category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: calc(var(--spacing-unit) * 1.5);
  margin: calc(var(--spacing-unit) * 2) 0;
}

.bridge-category-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--color-card-background);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 1.5);
  text-decoration: none;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.bridge-category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  border-color: var(--card-color, var(--color-primary));
}

.bridge-category-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-color, var(--color-primary));
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: var(--spacing-unit);
}

.bridge-category-card h2 {
  margin: 0 0 0.4rem;
  color: var(--color-text-dark);
  font-size: 1.15rem;
}

.bridge-category-card p {
  color: var(--color-text-medium);
  font-size: 0.92rem;
  line-height: 1.5;
  margin: 0 0 var(--spacing-unit);
  flex: 1;
}

.bridge-category-free {
  position: absolute;
  top: calc(var(--spacing-unit) * 1.5);
  right: calc(var(--spacing-unit) * 1.5);
  background: var(--card-color, var(--color-primary));
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}

.bridge-category-link {
  font-weight: 600;
  color: var(--card-color, var(--color-primary));
  font-size: 0.9rem;
}

.bridge-category-card:hover .bridge-category-link {
  text-decoration: underline;
}

/* ── Featured tips ────────────────────────────────── */
.bridge-section-heading {
  margin: 0 0 var(--spacing-unit);
  color: var(--color-text-dark);
}

.bridge-tip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-unit);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.bridge-tip-card {
  display: block;
  background: var(--color-card-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-unit);
  text-decoration: none;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.bridge-tip-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.07);
}

.bridge-tip-card h3 {
  margin: 0.5rem 0 0.35rem;
  color: var(--color-text-dark);
  font-size: 1rem;
}

.bridge-tip-card p {
  margin: 0;
  color: var(--color-text-medium);
  font-size: 0.88rem;
  line-height: 1.5;
}

.bridge-tip-theme {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.bridge-theme-formula-booklet {
  background: rgba(99, 102, 241, 0.12);
  color: #4338ca;
}

.bridge-theme-practical {
  background: rgba(230, 126, 34, 0.12);
  color: #a04a0e;
}

.bridge-theme-general {
  background: rgba(22, 160, 133, 0.12);
  color: #0d6e5c;
}

/* ── Usage banner ─────────────────────────────────── */
.bridge-usage-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.bridge-usage-banner i.fa-bolt {
  color: var(--color-primary);
}

.bridge-usage-banner.bridge-usage-exhausted {
  border-color: var(--color-gradient-gold-start);
}

.bridge-usage-upgrade {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.bridge-usage-upgrade:hover { text-decoration: underline; }

/* ── Formula drills page ──────────────────────────── */
.bridge-formula-list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 1.5);
  margin-top: calc(var(--spacing-unit) * 1.5);
}

.bridge-formula-card {
  background: var(--bg-primary, #fff);
  border: 1.5px solid var(--border-color, #e5e7eb);
  border-radius: 12px;
  padding: calc(var(--spacing-unit) * 1.25);
}

[data-theme="dark"] .bridge-formula-card {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-color, #2d2d44);
}

.bridge-formula-name {
  margin: 0 0 0.75rem;
  color: var(--text-primary, #111);
  font-size: 1.1rem;
}

.fb-exercise-feedback.fb-locked {
  background: rgba(99, 102, 241, 0.07);
  border: 1.5px dashed rgba(99, 102, 241, 0.3);
  color: var(--text-primary, #374151);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.fb-exercise-feedback.fb-locked i {
  color: var(--color-primary, #6366f1);
}

.fb-exercise-feedback.fb-locked span { flex: 1; }

/* ── MCQ quickfire ────────────────────────────────── */
.bridge-mcq-app {
  margin-top: calc(var(--spacing-unit) * 1.5);
}

.bridge-mcq-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--color-text-medium);
  margin-bottom: var(--spacing-unit);
}

.bridge-mcq-score-live {
  font-weight: 600;
  color: var(--color-text-dark);
}

.bridge-mcq-card {
  background: var(--color-card-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 1.5);
}

.bridge-mcq-practical-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: #3d4bb5;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  margin-bottom: 0.6rem;
}

.bridge-mcq-question {
  font-size: 1.05rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-unit);
  line-height: 1.5;
}

.bridge-mcq-options {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.bridge-mcq-option {
  text-align: left;
  padding: 0.75rem var(--spacing-unit);
  border: 1.5px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-card-background);
  color: var(--color-text-dark);
  font-size: 0.95rem;
  cursor: pointer;
  transition: border-color var(--transition-speed) ease, background var(--transition-speed) ease;
}

.bridge-mcq-option:hover:not(:disabled) {
  border-color: var(--color-primary);
}

.bridge-mcq-option:disabled { cursor: default; }

.bridge-mcq-option.correct {
  border-color: #22c55e;
  background: rgba(34, 197, 94, 0.1);
  color: #15803d;
}

.bridge-mcq-option.wrong {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
  color: #b91c1c;
}

.bridge-mcq-feedback {
  margin-top: var(--spacing-unit);
  padding: 0.85rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-text-dark);
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: none;
}

.bridge-mcq-feedback.visible { display: block; }

.bridge-mcq-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--spacing-unit);
}

.bridge-mcq-practical-link {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.bridge-mcq-practical-link:hover { text-decoration: underline; }

.bridge-mcq-next-btn {
  padding: 0.55rem 1.3rem;
  background: var(--color-primary);
  color: var(--color-card-background);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition-speed) ease;
}

.bridge-mcq-next-btn:hover { background: var(--color-primary-hover); }

.bridge-mcq-complete,
.bridge-mcq-locked {
  text-align: center;
  padding: calc(var(--spacing-unit) * 1.5) var(--spacing-unit);
}

.bridge-mcq-complete i,
.bridge-mcq-locked i {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  display: block;
}

.bridge-mcq-complete p,
.bridge-mcq-locked p {
  color: var(--color-text-medium);
  margin-bottom: var(--spacing-unit);
}

.bridge-mcq-restart-btn,
.bridge-mcq-locked .bridge-usage-upgrade {
  display: inline-block;
  padding: 0.55rem 1.3rem;
  background: var(--color-primary);
  color: var(--color-card-background);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-speed) ease;
}

.bridge-mcq-restart-btn:hover,
.bridge-mcq-locked .bridge-usage-upgrade:hover { background: var(--color-primary-hover); }

/* ── Data hunt ────────────────────────────────────── */
.bridge-hunt-list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 1.5);
  margin-top: calc(var(--spacing-unit) * 1.5);
}

.bridge-hunt-card {
  background: var(--color-card-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 1.25);
}

.bridge-hunt-card h2 {
  margin: 0 0 0.5rem;
  color: var(--color-text-dark);
  font-size: 1.1rem;
}

.bridge-hunt-stem {
  color: var(--color-text-medium);
  line-height: 1.6;
  margin-bottom: var(--spacing-unit);
}

.bridge-hunt-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.bridge-hunt-cat-btn {
  padding: 0.4rem 0.9rem;
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card-background);
  color: var(--color-text-dark);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition-speed) ease, color var(--transition-speed) ease, background var(--transition-speed) ease;
}

.bridge-hunt-cat-btn.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.08);
}

.bridge-hunt-instructions {
  font-size: 0.85rem;
  color: var(--color-text-medium);
  font-style: italic;
  margin-bottom: var(--spacing-unit);
}

.bridge-hunt-items {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: var(--spacing-unit);
}

.bridge-hunt-chip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem var(--spacing-unit);
  border: 1.5px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-card-background);
  color: var(--color-text-dark);
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color var(--transition-speed) ease, background var(--transition-speed) ease;
}

.bridge-hunt-chip:hover { border-color: var(--color-primary); }

.bridge-hunt-chip.selected {
  border-color: var(--color-primary);
  background: rgba(99, 102, 241, 0.08);
}

.bridge-hunt-chip.correct {
  border-color: #22c55e;
  background: rgba(34, 197, 94, 0.1);
}

.bridge-hunt-chip.wrong {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

.bridge-hunt-chip-text { flex: 1; }

.bridge-hunt-chip-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  white-space: nowrap;
}

.bridge-hunt-actions {
  display: flex;
  gap: 0.6rem;
  margin-bottom: var(--spacing-unit);
}

.bridge-hunt-check-btn,
.bridge-hunt-reset-btn {
  padding: 0.55rem 1.3rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.bridge-hunt-check-btn {
  background: var(--color-primary);
  color: var(--color-card-background);
  border: none;
}

.bridge-hunt-check-btn:hover { background: var(--color-primary-hover); }

.bridge-hunt-reset-btn {
  background: none;
  border: 1.5px solid var(--color-border);
  color: var(--color-text-medium);
}

.bridge-hunt-reset-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.bridge-hunt-feedback {
  padding: 0.85rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-text-dark);
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: none;
}

.bridge-hunt-feedback.visible { display: block; }

.bridge-hunt-feedback.bridge-locked {
  background: rgba(99, 102, 241, 0.07);
  border: 1.5px dashed rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.bridge-hunt-feedback.bridge-locked i { color: var(--color-primary); }
.bridge-hunt-feedback.bridge-locked span { flex: 1; }

/* ── Utilities ────────────────────────────────────── */
.text-center { text-align: center; }
.mt-30 { margin-top: 30px; }

.back-link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.back-link:hover { text-decoration: underline; }

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 600px) {
  .bridge-category-grid,
  .bridge-tip-grid {
    grid-template-columns: 1fr;
  }

  .bridge-mcq-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .bridge-mcq-next-btn { width: 100%; }
}