/* ═══════════════════════════════════════════════════════════════
   DSA In Depth — Simulators, Complexity Badges & Callouts CSS
   ═══════════════════════════════════════════════════════════════ */

/* Complexity Badges */
.badge-o1,
.badge-ologn,
.badge-on,
.badge-onlogn,
.badge-on2,
.badge-oexp {
  display: inline-block;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace);
  font-size: 11.5px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  line-height: 1.4;
  white-space: nowrap;
}

.badge-o1 {
  background: rgba(16, 185, 129, 0.14);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.badge-ologn {
  background: rgba(59, 130, 246, 0.14);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.35);
}

.badge-on {
  background: rgba(139, 92, 246, 0.14);
  color: #a78bfa;
  border: 1px solid rgba(139, 92, 246, 0.35);
}

.badge-onlogn {
  background: rgba(245, 158, 11, 0.14);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.badge-on2 {
  background: rgba(249, 115, 22, 0.14);
  color: #fb923c;
  border: 1px solid rgba(249, 115, 22, 0.35);
}

.badge-oexp {
  background: rgba(239, 68, 68, 0.14);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

/* Complexity Matrix Table */
.complexity-matrix {
  margin: 1.5rem 0;
  border: 1px solid var(--border-subtle, #26262a);
  border-radius: 10px;
  overflow-x: auto;
  background: var(--bg-secondary, #121215);
}

.complexity-matrix table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: 13.5px;
}

.complexity-matrix th {
  background: rgba(255, 255, 255, 0.03);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-muted, #9ca3af);
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle, #26262a);
}

.complexity-matrix td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle, #26262a);
  vertical-align: middle;
}

.complexity-matrix tr:last-child td {
  border-bottom: none;
}

/* Invariant & Hardware Reality Callout Boxes */
.invariant-box,
.hardware-box {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  background: var(--bg-secondary, #121215);
  border: 1px solid var(--border-subtle, #26262a);
  border-left-width: 4px;
}

.invariant-box {
  border-left-color: #6366f1;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.08) 0%, rgba(18, 18, 21, 0.4) 100%);
}

.hardware-box {
  border-left-color: #10b981;
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.08) 0%, rgba(18, 18, 21, 0.4) 100%);
}

.invariant-box h4,
.hardware-box h4 {
  margin: 0 0 0.5rem 0;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.invariant-box h4 {
  color: #818cf8;
}

.hardware-box h4 {
  color: #34d399;
}

/* Interactive Visual Simulators */
.simulator-mount {
  margin: 1.75rem 0;
}

.dsa-sim {
  border: 1px solid var(--border-subtle, #27272a);
  border-radius: 12px;
  background: var(--bg-secondary, #111114);
  padding: 1.25rem;
  margin: 1.5rem 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.dsa-sim__header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.dsa-sim__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--fg-primary, #f4f4f5);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dsa-sim__subtitle {
  font-size: 13px;
  color: var(--fg-muted, #a1a1aa);
  margin: 0 0 1rem 0;
  line-height: 1.5;
}

.dsa-sim__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle, #27272a);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.dsa-sim__stage {
  background: var(--bg-primary, #09090b);
  border: 1px solid var(--border-subtle, #27272a);
  border-radius: 8px;
  padding: 1rem;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
  overflow-x: auto;
}

.dsa-sim__array {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: flex-end;
  justify-content: center;
  min-height: 90px;
  padding: 8px 4px;
}

.dsa-sim__cell {
  min-width: 42px;
  padding: 8px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle, #2e2e34);
  text-align: center;
  font-family: var(--font-mono, monospace);
  font-size: 12.5px;
  transition: all 0.2s ease;
  position: relative;
}

.dsa-sim__cell.is-active {
  background: rgba(99, 102, 241, 0.22);
  border-color: #6366f1;
  color: #c7d2fe;
  transform: translateY(-3px);
}

.dsa-sim__cell.is-match,
.dsa-sim__cell.is-hit {
  background: rgba(16, 185, 129, 0.22);
  border-color: #10b981;
  color: #a7f3d0;
}

.dsa-sim__cell.is-warn,
.dsa-sim__cell.is-miss {
  background: rgba(239, 68, 68, 0.2);
  border-color: #ef4444;
  color: #fecaca;
}

.dsa-sim__cell.is-pivot {
  background: rgba(245, 158, 11, 0.22);
  border-color: #f59e0b;
  color: #fde68a;
}

.dsa-sim__cell-idx {
  display: block;
  font-size: 10px;
  color: var(--fg-faint, #71717a);
  margin-bottom: 2px;
}

.dsa-sim__cell-val {
  font-weight: 700;
  font-size: 13px;
}

.dsa-sim__cell-tag {
  display: block;
  font-size: 9.5px;
  margin-top: 2px;
  color: #818cf8;
}

.dsa-sim__metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(125px, 1fr));
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.dsa-sim__metric {
  padding: 0.6rem 0.75rem;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-subtle, #27272a);
  border-radius: 6px;
}

.dsa-sim__metric-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-faint, #71717a);
}

.dsa-sim__metric-value {
  font-family: var(--font-mono, monospace);
  font-size: 14px;
  font-weight: 700;
  color: var(--fg-primary, #f4f4f5);
  margin-top: 2px;
}

.dsa-sim__log {
  margin-top: 0.75rem;
  padding: 0.65rem 0.85rem;
  background: #070709;
  border: 1px solid var(--border-subtle, #27272a);
  border-radius: 6px;
  font-family: var(--font-mono, monospace);
  font-size: 12px;
  color: #a1a1aa;
  max-height: 125px;
  overflow-y: auto;
  line-height: 1.5;
}

.dsa-sim__custom-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem;
  background: rgba(99, 102, 241, 0.05);
  border: 1px solid rgba(99, 102, 241, 0.22);
  border-radius: 8px;
  margin-bottom: 0.75rem;
}

.dsa-sim__custom-label {
  font-size: 11.5px;
  font-weight: 600;
  color: #a5b4fc;
  font-family: var(--font-mono, monospace);
  white-space: nowrap;
}

.dsa-sim__custom-input {
  flex: 1 1 220px;
  min-width: 160px;
  padding: 5px 10px;
  font-size: 12.5px;
  font-family: var(--font-mono, monospace);
  color: var(--fg-primary, #f4f4f5);
  background: var(--bg-primary, #09090b);
  border: 1px solid var(--border-subtle, #3f3f46);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.dsa-sim__custom-input:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.dsa-sim__scrubber-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 0.75rem 0;
  padding: 0 0.25rem;
}

.dsa-sim__scrubber {
  flex: 1;
  height: 6px;
  accent-color: #6366f1;
  cursor: pointer;
}

.dsa-sim__audio-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  font-size: 11.5px;
  font-family: var(--font-mono, monospace);
  border-radius: 6px;
  border: 1px solid var(--border-subtle, #3f3f46);
  background: rgba(255, 255, 255, 0.03);
  color: var(--fg-muted, #a1a1aa);
  cursor: pointer;
  transition: all 0.15s ease;
}

.dsa-sim__audio-btn.is-on {
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.45);
  color: #34d399;
}

.dsa-sim__audio-btn:hover {
  border-color: #6366f1;
  color: var(--fg-primary, #f4f4f5);
}

.dsa-sim__visual-canvas {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 8px;
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.55) 0%, rgba(9, 9, 11, 0.75) 100%);
  padding: 8px 10px;
}

.dsa-sim__visual-canvas svg {
  width: 100%;
  display: block;
  font-family: var(--font-mono, monospace);
}

.dsa-sim__log {
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.dsa-sim__log.is-speaking {
  border-color: rgba(16, 185, 129, 0.55);
  box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.2);
  color: #e4e4e7;
}

.dsa-sim__voice-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px;
  margin-right: 6px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.16);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
  vertical-align: middle;
}