/* ═══════════════════════════════════════════════════════════════
   Revision Scheduler — specific styles
═══════════════════════════════════════════════════════════════ */

.rs-schedule-options {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.rs-chapter-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  gap: 12px;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--color-border-light);
  transition: background 0.1s;
  max-width: 100%;
}

.rs-chapter-row:hover {
  background: var(--color-bg-alt);
}

.rs-chapter-row:last-child { border-bottom: none; }

.rs-chapter-row__main {
  min-width: 0;
}

.rs-chapter-row__name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rs-chapter-row__meta {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.rs-subject-tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: var(--font-semibold);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  margin-right: 6px;
}

.rs-progress {
  display: flex;
  gap: 3px;
}

.rs-progress__dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1.5px solid var(--color-border);
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-weight: var(--font-semibold);
}

.rs-progress__dot--done {
  background: #16a34a;
  border-color: #16a34a;
  color: #fff;
}

.rs-progress__dot--due {
  background: #fcd34d;
  border-color: #f59e0b;
  color: #92400e;
  animation: rs-pulse 1.5s infinite;
}

.rs-progress__dot--overdue {
  background: #fee2e2;
  border-color: #dc2626;
  color: #b91c1c;
}

@keyframes rs-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

.rs-next-due {
  font-size: 11px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.rs-next-due--today { color: #d97706; font-weight: var(--font-semibold); }
.rs-next-due--overdue { color: #dc2626; font-weight: var(--font-semibold); }
.rs-next-due--done { color: #16a34a; font-weight: var(--font-semibold); }

.rs-actions {
  display: flex;
  gap: 4px;
}

.rs-btn-icon {
  background: transparent;
  border: 1px solid var(--color-border);
  width: 28px; height: 28px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
}

.rs-btn-icon:hover { background: var(--color-bg-alt); color: var(--color-text); }
.rs-btn-icon--success:hover { background: #dcfce7; color: #15803d; border-color: #86efac; }
.rs-btn-icon--danger:hover { background: #fee2e2; color: #b91c1c; border-color: #fca5a5; }

.rs-row-due {
  background: rgba(252,211,77,0.08);
  border-left: 3px solid #f59e0b;
}

.rs-row-overdue {
  background: rgba(239,68,68,0.05);
  border-left: 3px solid #dc2626;
}

.rs-row-mastered {
  opacity: 0.6;
}

.rs-empty-row {
  padding: 24px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ── Mobile improvements for Revision Scheduler ── */
@media (max-width: 500px) {
  .rs-chapter-row {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 8px;
    padding: 10px 12px;
  }
  .rs-chapter-row__main { grid-column: 1 / -1; }
  .rs-chapter-row__name { font-size: 13px; }
  .rs-chapter-row__meta { font-size: 10px; }
  .rs-progress { grid-column: 1; }
  .rs-progress__dot { width: 14px; height: 14px; font-size: 9px; }
  .rs-next-due { font-size: 10px; }
  .rs-actions { grid-column: 2; }
  .rs-btn-icon { width: 26px; height: 26px; font-size: 12px; }
}