/* Review callout */
.callout {
  border: 1px solid color-mix(in srgb, var(--amber) 28%, transparent);
  background: color-mix(in srgb, var(--amber) 7%, var(--surface));
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  margin-top: 1.5rem;
}
.callout h2 {
  margin: 0 0 0.5rem;
  font-size: var(--text-base);
}
.callout ul {
  margin: 0;
  padding-left: 1.1rem;
}

/* Phases & subjects */
.phase {
  margin-bottom: 2.5rem;
}
.phase-head {
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.phase-head::-webkit-details-marker {
  display: none;
}
.phase-head-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.phase-head-row > .edit-actions {
  margin-left: auto;
}
.phase-head .phase-count {
  margin-left: auto;
  font-size: var(--text-sm);
}
.phase-head .fa-chevron-right {
  font-size: var(--text-sm);
  color: var(--muted);
  transition: transform 0.15s;
}
.phase[open] > .phase-head .fa-chevron-right {
  transform: rotate(90deg);
}
.phase-head .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: var(--text-sm);
  font-weight: 700;
}
.phase-desc {
  color: var(--muted);
  font-size: var(--text-sm);
  margin: 0.2rem 0 1rem;
}

.subject {
  margin: 0 0 1.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--border);
}
.subject-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  list-style: none;
  margin: 0.4rem 0 0.5rem;
  font-size: var(--text-base);
  color: var(--text);
  user-select: none;
}
.subject-head::-webkit-details-marker {
  display: none;
}
.subject-head:hover {
  color: var(--accent);
}
.subject-head .fa-chevron-right {
  font-size: 0.75em;
  color: var(--muted);
  transition: transform 0.15s;
}
.subject[open] > .subject-head .fa-chevron-right {
  transform: rotate(90deg);
}
.subject-name {
  font-weight: 600;
}
.subject-count {
  font-size: var(--text-sm);
  margin-left: auto;
}
.subject-desc {
  color: var(--muted);
  font-size: var(--text-sm);
  margin: 0 0 0.6rem;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem;
}
.topic-card {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  transition:
    border-color 0.15s,
    transform 0.15s,
    box-shadow 0.15s;
}
.topic-card:hover {
  text-decoration: none;
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.topic-card.locked {
  opacity: 0.6;
  pointer-events: none;
}
.topic-card .title {
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.topic-card .desc {
  color: var(--muted);
  font-size: var(--text-sm);
}

.badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.5rem;
}
/* Inline next to a title or label: centre on the text, no bottom gap. */
:is(h1, h2, h3, li, .subject-head) .badge {
  margin-bottom: 0;
  vertical-align: middle;
}
.badge.completed {
  background: color-mix(in srgb, var(--green) 14%, transparent);
  color: var(--green);
}
.badge.in_progress {
  background: color-mix(in srgb, var(--amber) 16%, transparent);
  color: var(--amber);
}
.badge.available {
  background: var(--accent-soft);
  color: var(--accent);
}
.badge.locked {
  background: var(--surface-2);
  color: var(--muted);
}

/* Due reviews: a red count pill (navbar, track cards) and a teal "due" badge/outline on lessons. */
.notif-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.3rem;
  height: 1.3rem;
  padding: 0 0.38rem;
  border-radius: var(--radius-pill);
  background: var(--red);
  color: var(--surface);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
/* Text + pill side by side, centred on each other. */
.nav-bubble a,
.track-card h2 {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.badge.due {
  background: color-mix(in srgb, var(--teal) 16%, transparent);
  color: var(--teal);
  margin-left: 0.25rem;
}
.topic-card.due,
.track-card.has-due {
  border-color: var(--teal);
  box-shadow: 0 0 0 1px var(--teal), var(--shadow);
}
.topic-status.due {
  padding: 0.75rem 1rem;
  border: 1px solid color-mix(in srgb, var(--teal) 40%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--teal) 8%, var(--surface));
}
.btn.review-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--teal);
  border-color: var(--teal);
  color: var(--surface);
}
.btn.review-btn:hover {
  background: color-mix(in srgb, var(--teal) 85%, var(--text));
}

/* Self-rating: forgot (red), hard (amber), got it (green). */
.btn.grade-again,
.btn.grade-hard,
.btn.grade-good {
  background: color-mix(in srgb, var(--grade) 12%, var(--surface));
  border-color: color-mix(in srgb, var(--grade) 40%, transparent);
  color: var(--grade);
}
.btn.grade-again:hover,
.btn.grade-hard:hover,
.btn.grade-good:hover {
  background: color-mix(in srgb, var(--grade) 22%, var(--surface));
}
.btn.grade-again {
  --grade: var(--red);
}
.btn.grade-hard {
  --grade: var(--amber);
}
.btn.grade-good {
  --grade: var(--green);
}