/* ========== Earthy cinematic maze theme ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #1a1612;
  --bg-deep: #0f0d0b;
  --surface: #252019;
  --surface2: #322a22;
  --text: #ede6dc;
  --muted: #9a8f82;
  --stone: #3d3830;
  --moss: #2f4a38;
  --sand: #c4b59d;
  --sand-deep: #a8987e;
  --ember: #c94c3d;
  --ember-glow: rgba(201, 76, 61, 0.55);
  --jade: #5a9e6f;
  --jade-glow: rgba(90, 158, 111, 0.45);
  --amber: #e8a045;
  --amber-glow: rgba(232, 160, 69, 0.85);
  --cyan-path: #5ec8e8;
  --cyan-glow: rgba(94, 200, 232, 0.35);
  --fire-dfs: #e8783a;
  --fire-glow: rgba(232, 120, 58, 0.4);
  --purple-dij: #b07cff;
  --purple-glow: rgba(176, 124, 255, 0.38);
  --gold-path: #e8c566;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Cinzel", "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background:
    radial-gradient(ellipse 100% 80% at 50% 0%, rgba(47, 74, 56, 0.35) 0%, transparent 50%),
    radial-gradient(ellipse 80% 50% at 80% 100%, rgba(90, 60, 40, 0.2) 0%, transparent 45%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 40%, #120f0c 100%);
  color: var(--text);
  line-height: 1.55;
}

.page {
  display: none;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

#landing-page.landing-experience.page {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 0;
  position: relative;
  min-height: 100vh;
  overflow-x: clip;
}

.page.active {
  display: block;
}

.page[hidden] {
  display: none !important;
}

.muted {
  color: var(--muted);
  font-size: 0.9em;
}

.mono {
  font-family: var(--mono);
  font-size: 0.85em;
}

.hidden {
  display: none !important;
}

/* ========== Landing (interactive story module) ========== */
.tag {
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9em;
}

.tag.start {
  background: rgba(90, 158, 111, 0.25);
  color: #8fd4a0;
}

.tag.end {
  background: rgba(201, 76, 61, 0.25);
  color: #ff8a7a;
}

.landing-atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.landing-map-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.35;
}

.landing-fog {
  position: absolute;
  inset: -20%;
  background: radial-gradient(ellipse 60% 50% at 50% 40%, transparent 30%, rgba(15, 13, 11, 0.85) 90%);
  animation: landingFogDrift 28s ease-in-out infinite;
}

.landing-fog--2 {
  animation-duration: 38s;
  animation-delay: -8s;
  opacity: 0.7;
  transform: scale(1.1);
}

@keyframes landingFogDrift {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(2%, -1%) rotate(0.5deg);
  }
  66% {
    transform: translate(-1.5%, 2%) rotate(-0.3deg);
  }
}

.landing-parallax-layer {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(196, 181, 157, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196, 181, 157, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 35%, black 20%, transparent 75%);
}

.landing-inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.landing-hero {
  text-align: center;
  margin-bottom: 3rem;
}

.landing-badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--surface2);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.landing-title {
  font-family: var(--display);
  font-size: clamp(1.85rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin: 0 0 1rem;
  background: linear-gradient(135deg, #f5ebe0 0%, #c4b59d 45%, #7aab84 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 24px rgba(201, 162, 39, 0.12));
}

.landing-lead {
  max-width: 36rem;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.05rem;
}

.story-section {
  margin-bottom: 4rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: rgba(37, 32, 25, 0.65);
  border: 1px solid rgba(196, 181, 157, 0.1);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(8px);
}

.story-reveal {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}

.story-reveal.story-reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

.story-num {
  font-family: var(--display);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--amber);
  opacity: 0.85;
  display: block;
  margin-bottom: 0.35rem;
}

.story-heading {
  font-family: var(--display);
  font-size: 1.45rem;
  margin: 0 0 0.75rem;
  letter-spacing: 0.04em;
}

.story-heading--center {
  text-align: center;
}

.story-text {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 1rem;
}

.story-text--center {
  text-align: center;
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
}

.story-caption {
  font-size: 0.85rem;
  margin-top: 1rem;
}

.story-visual {
  margin-top: 1.25rem;
  display: flex;
  justify-content: center;
}

.maze-icon-grid {
  width: 120px;
  height: 120px;
  background-image:
    linear-gradient(rgba(232, 160, 69, 0.25) 2px, transparent 2px),
    linear-gradient(90deg, rgba(232, 160, 69, 0.25) 2px, transparent 2px);
  background-size: 24px 24px;
  border-radius: 8px;
  border: 1px solid rgba(196, 181, 157, 0.2);
  animation: mazeIconPulse 4s ease-in-out infinite;
}

@keyframes mazeIconPulse {
  0%,
  100% {
    box-shadow: 0 0 0 rgba(232, 160, 69, 0);
    opacity: 0.85;
  }
  50% {
    box-shadow: 0 0 28px rgba(232, 160, 69, 0.15);
    opacity: 1;
  }
}

.graph-schematic {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.graph-node {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface2);
  border: 2px solid rgba(196, 181, 157, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-weight: 700;
}

.graph-node--s {
  border-color: rgba(90, 158, 111, 0.6);
  box-shadow: 0 0 14px var(--jade-glow);
}

.graph-node--e {
  border-color: rgba(201, 76, 61, 0.55);
  box-shadow: 0 0 14px var(--ember-glow);
}

.graph-edge {
  width: 36px;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(196, 181, 157, 0.6), transparent);
  border-radius: 2px;
}

/* Keyword hover */
.kw-term {
  cursor: help;
  border-bottom: 1px dashed rgba(94, 200, 232, 0.45);
  padding-bottom: 1px;
  transition: color 0.2s ease, box-shadow 0.2s ease;
}

.kw-term--dfs {
  border-bottom-color: rgba(232, 120, 58, 0.55);
}

.kw-term--dij {
  border-bottom-color: rgba(176, 124, 255, 0.55);
}

.kw-term:hover {
  color: #fff;
  box-shadow: 0 0 16px rgba(94, 200, 232, 0.15);
}

.kw-tooltip {
  position: fixed;
  z-index: 200;
  pointer-events: none;
  max-width: 220px;
  transition: opacity 0.2s ease;
}

.kw-tooltip[data-show="bfs"] .kw-tooltip__title::after {
  content: " · breadth expands in waves";
}

.kw-tooltip[data-show="dfs"] .kw-tooltip__title::after {
  content: " · depth then retreat";
}

.kw-tooltip[data-show="dijkstra"] .kw-tooltip__title::after {
  content: " · cheapest node first";
}

.kw-tooltip__inner {
  background: linear-gradient(155deg, #322a22, #1f1b17);
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: 10px;
  padding: 0.75rem;
  box-shadow: var(--shadow);
}

.kw-tooltip__title {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.kw-tooltip__anim {
  display: none;
}

.kw-tooltip[data-show="bfs"] .kw-tooltip__anim--queue {
  display: flex;
}

.kw-tooltip[data-show="dfs"] .kw-tooltip__anim--stack {
  display: flex;
}

.kw-tooltip[data-show="dijkstra"] .kw-tooltip__anim--pq {
  display: block;
}

.kw-tooltip__anim--queue {
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.kw-tooltip__anim--queue span:not(.kw-tooltip__arrow) {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: linear-gradient(145deg, rgba(94, 200, 232, 0.5), rgba(94, 200, 232, 0.2));
  animation: kwQueueShift 2s ease-in-out infinite;
}

.kw-tooltip__anim--queue span:nth-child(2) {
  animation-delay: 0.2s;
}

.kw-tooltip__anim--queue span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes kwQueueShift {
  0%,
  100% {
    transform: translateX(0);
    opacity: 0.6;
  }
  50% {
    transform: translateX(6px);
    opacity: 1;
  }
}

.kw-tooltip__anim--stack {
  flex-direction: column;
  gap: 4px;
  align-items: stretch;
}

.stack-label {
  font-size: 0.65rem;
  color: var(--muted);
  text-align: right;
}

.kw-tooltip__anim--stack span:not(.kw-tooltip__arrow):not(.stack-label) {
  height: 18px;
  border-radius: 4px;
  background: linear-gradient(90deg, rgba(232, 120, 58, 0.65), rgba(232, 120, 58, 0.25));
  animation: kwStackPulse 1.6s ease-in-out infinite;
}

.kw-tooltip__anim--stack span:nth-child(3) {
  animation-delay: 0.15s;
}

.kw-tooltip__anim--stack span:nth-child(4) {
  animation-delay: 0.3s;
}

@keyframes kwStackPulse {
  0%,
  100% {
    transform: scaleX(0.92);
    opacity: 0.65;
  }
  50% {
    transform: scaleX(1);
    opacity: 1;
  }
}

.pq-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 8px;
  margin-bottom: 4px;
  border-radius: 4px;
  background: rgba(176, 124, 255, 0.12);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.pq-row em {
  font-style: normal;
  color: var(--purple-dij);
}

.pq-row--active {
  background: rgba(176, 124, 255, 0.35);
  animation: pqGlow 1.4s ease-in-out infinite;
}

@keyframes pqGlow {
  0%,
  100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.15);
  }
}

.kw-tooltip__arrow {
  display: block;
  font-size: 0.68rem;
  color: var(--muted);
  margin-top: 6px;
  font-family: var(--mono);
}

/* Interactive algorithm cards */
.algo-card-interactive {
  margin-top: 1rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid rgba(196, 181, 157, 0.12);
  background: rgba(26, 22, 18, 0.5);
  cursor: pointer;
  transition:
    border-color 0.25s ease,
    box-shadow 0.25s ease,
    transform 0.2s ease;
}

.algo-card-interactive:hover,
.algo-card-interactive:focus-visible {
  border-color: rgba(201, 162, 39, 0.35);
  box-shadow: 0 0 28px rgba(94, 200, 232, 0.08);
  outline: none;
}

.algo-card-interactive--dfs:hover,
.algo-card-interactive--dfs:focus-visible {
  box-shadow: 0 0 28px rgba(232, 120, 58, 0.12);
}

.algo-card-interactive--dij:hover,
.algo-card-interactive--dij:focus-visible {
  box-shadow: 0 0 28px rgba(176, 124, 255, 0.12);
}

.algo-chip {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  background: rgba(94, 200, 232, 0.18);
  color: var(--cyan-path);
}

.algo-chip--dfs {
  background: rgba(232, 120, 58, 0.18);
  color: var(--fire-dfs);
}

.algo-chip--dij {
  background: rgba(176, 124, 255, 0.18);
  color: var(--purple-dij);
}

.algo-card-interactive__desc {
  margin: 0.65rem 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.landing-mini-wrap {
  margin-bottom: 1rem;
}

.landing-mini-grid {
  display: grid;
  gap: 0;
  margin: 0 auto;
  width: fit-content;
  padding: 4px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--stone), #2a2520);
}

.landing-mini-grid--play .landing-cell {
  cursor: pointer;
}

.landing-mini-grid--play .landing-cell:hover {
  filter: brightness(1.12);
}

.landing-cell {
  box-sizing: border-box;
  background: linear-gradient(160deg, var(--sand), var(--sand-deep));
  border: 1px solid rgba(61, 56, 48, 0.2);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-family: var(--mono);
  color: rgba(30, 26, 22, 0.65);
}

.landing-cell.w-n {
  border-top: 3px solid var(--stone);
}

.landing-cell.w-e {
  border-right: 3px solid var(--stone);
}

.landing-cell.w-s {
  border-bottom: 3px solid var(--stone);
}

.landing-cell.w-w {
  border-left: 3px solid var(--stone);
}

.landing-cell.start {
  background: radial-gradient(circle at 35% 30%, rgba(143, 212, 160, 0.95), var(--jade));
}

.landing-cell.end {
  background: radial-gradient(circle at 35% 30%, rgba(255, 140, 120, 0.95), #a03830);
}

.landing-cell.v-bfs {
  background: linear-gradient(160deg, rgba(94, 200, 232, 0.55), var(--sand-deep));
}

.landing-cell.v-dfs {
  background: linear-gradient(160deg, rgba(232, 120, 58, 0.52), var(--sand-deep));
}

.landing-cell.v-dij {
  background: linear-gradient(160deg, rgba(176, 124, 255, 0.52), var(--sand-deep));
}

.landing-cell.frontier {
  outline: 2px solid rgba(255, 248, 234, 0.85);
  outline-offset: -2px;
  z-index: 1;
}

.landing-cell.current {
  box-shadow: inset 0 0 0 3px rgba(255, 250, 240, 0.95);
  z-index: 2;
}

.landing-cell.backtrack {
  animation: backtrackFlash 0.45s ease;
}

@keyframes backtrackFlash {
  0% {
    background: rgba(232, 120, 58, 0.85);
  }
  100% {
    background: linear-gradient(160deg, rgba(232, 120, 58, 0.35), var(--sand-deep));
  }
}

.landing-cell.path {
  background: linear-gradient(160deg, var(--gold-path), #b8923a) !important;
}

.btn-sim {
  width: 100%;
}

.landing-mini-legend {
  text-align: center;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.compare-slider-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.compare-speed-label {
  font-size: 0.85rem;
  color: var(--muted);
}

.compare-slider-row input[type="range"] {
  flex: 1;
  min-width: 140px;
  accent-color: var(--amber);
}

.compare-twin-grids {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 560px) {
  .compare-twin-grids {
    grid-template-columns: 1fr;
  }
}

.compare-twin-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  margin-bottom: 0.35rem;
  color: var(--muted);
}

.playground-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.playground-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.playground-actions .btn {
  flex: 1;
  min-width: 100px;
}

.landing-finale {
  text-align: center;
  border: 1px solid rgba(201, 162, 39, 0.22);
  background: rgba(37, 32, 25, 0.85);
}

.landing-enter-btn {
  margin-top: 0.5rem;
}

.landing-footer {
  margin-top: 1.25rem;
  font-size: 0.85rem;
}

/* Entry transition */
.landing-enter-transition {
  position: fixed;
  inset: 0;
  z-index: 300;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.landing-enter-vignette {
  position: absolute;
  inset: 0;
  background: rgba(8, 6, 4, 0);
  transition: background 1.1s ease;
}

.landing-enter-transition--active .landing-enter-vignette {
  background: rgba(8, 6, 4, 0.94);
}

.landing-enter-maze {
  position: relative;
  z-index: 1;
  transform: scale(0.65);
  opacity: 0;
  transition:
    transform 1.15s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.8s ease;
}

.landing-enter-transition--active .landing-enter-maze {
  transform: scale(1.05);
  opacity: 1;
}

.landing-enter-maze-grid {
  width: min(72vw, 420px);
  height: min(72vw, 420px);
  background-image:
    linear-gradient(rgba(196, 181, 157, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196, 181, 157, 0.15) 1px, transparent 1px);
  background-size: 24px 24px;
  border: 2px solid rgba(201, 162, 39, 0.35);
  border-radius: 12px;
  box-shadow:
    0 0 60px rgba(232, 160, 69, 0.15),
    inset 0 0 40px rgba(0, 0, 0, 0.35);
}

/* ========== Buttons ========== */
.btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, #c9a227 0%, #8b6914 100%);
  color: #1c1814;
  box-shadow: 0 4px 20px rgba(201, 162, 39, 0.35);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(201, 162, 39, 0.45);
}

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid rgba(196, 181, 157, 0.15);
}

.btn-secondary:hover:not(:disabled) {
  background: #3d342b;
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid rgba(196, 181, 157, 0.15);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--text);
  border-color: rgba(196, 181, 157, 0.35);
}

.btn-large {
  padding: 0.85rem 2.25rem;
  font-size: 1.05rem;
  border-radius: 12px;
}

.btn-block {
  width: 100%;
}

/* ========== Game layout ========== */
#game-page.active {
  display: flex;
  flex-direction: column;
  max-width: 1680px;
  padding: 0 1rem 1.5rem;
  min-height: 100vh;
}

.game-topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0 1rem;
  flex-shrink: 0;
}

.game-brand {
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
  color: var(--muted);
  flex: 1;
  text-align: center;
  letter-spacing: 0.04em;
}

.ambient-toggle {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}

.ambient-toggle input {
  accent-color: var(--amber);
}

.game-shell {
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr) 300px;
  gap: 1rem;
  align-items: start;
  flex: 1;
  min-height: 0;
}

@media (max-width: 1100px) {
  .game-shell {
    grid-template-columns: 1fr;
  }

  .game-brand {
    display: none;
  }
}

.panel {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
  border: 1px solid rgba(196, 181, 157, 0.08);
  box-shadow: var(--shadow);
}

.panel-title {
  font-family: var(--display);
  font-size: 1.05rem;
  margin: 0 0 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.control-group {
  margin-bottom: 1rem;
}

.control-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.control-group select,
.control-group input[type="range"] {
  width: 100%;
}

.control-group select {
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  border: 1px solid rgba(196, 181, 157, 0.12);
  background: var(--surface2);
  color: var(--text);
  font-family: inherit;
}

.player-hint {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0 0 0.75rem;
  line-height: 1.4;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.btn-row .btn {
  flex: 1;
  min-width: 0;
}

.panel-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  position: relative;
}

/* Enter labyrinth overlay */
.enter-overlay {
  position: absolute;
  inset: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: radial-gradient(ellipse at center, rgba(26, 22, 18, 0.92) 0%, rgba(15, 13, 11, 0.97) 100%);
  backdrop-filter: blur(4px);
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.enter-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.enter-card {
  max-width: 26rem;
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid rgba(201, 162, 39, 0.25);
  background: linear-gradient(145deg, rgba(50, 42, 34, 0.95), rgba(26, 22, 18, 0.98));
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  animation: enterPulse 3.5s ease-in-out infinite;
}

@keyframes enterPulse {
  0%,
  100% {
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), 0 0 0 0 rgba(201, 162, 39, 0);
  }
  50% {
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), 0 0 40px rgba(201, 162, 39, 0.12);
  }
}

.enter-kicker {
  font-family: var(--display);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.5rem;
}

.enter-title {
  font-family: var(--display);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 0.75rem;
  color: #f0e6d8;
}

.enter-text {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Cinematic maze stage */
.maze-stage {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: var(--radius);
  overflow: hidden;
}

.maze-stage--intro .maze-zoom {
  transform: scale(1.12);
  filter: saturate(0.85) brightness(0.92);
}

.maze-zoom {
  transition: transform 1.15s cubic-bezier(0.22, 1, 0.36, 1), filter 1s ease;
  width: 100%;
  display: flex;
  justify-content: center;
}

.maze-stage--entered .maze-zoom {
  transform: scale(1);
  filter: saturate(1) brightness(1);
}

.dust-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 4;
  opacity: 0.5;
}

.maze-vignette {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: radial-gradient(ellipse 75% 65% at 50% 45%, transparent 35%, rgba(8, 6, 4, 0.75) 100%);
  mix-blend-mode: multiply;
}

.maze-fog {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: rgba(26, 32, 28, 0.12);
  backdrop-filter: blur(0.8px);
  opacity: 0.85;
}

.maze-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.65rem;
  background: linear-gradient(160deg, #2a241c 0%, #1e1a15 100%);
  border-radius: 10px;
  border: 1px solid rgba(196, 181, 157, 0.12);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 16px 48px rgba(0, 0, 0, 0.4);
  overflow: auto;
  max-height: min(72vh, 820px);
  position: relative;
  z-index: 1;
}

.maze-grid {
  display: grid;
  gap: 0;
  background: linear-gradient(145deg, var(--stone), #2a2520);
  padding: 4px;
  border-radius: 8px;
  user-select: none;
  filter: drop-shadow(0 0 12px rgba(0, 0, 0, 0.35));
}

.cell {
  box-sizing: border-box;
  background: linear-gradient(160deg, var(--sand) 0%, var(--sand-deep) 100%);
  border: 1px solid rgba(61, 56, 48, 0.25);
  position: relative;
  min-width: 4px;
  min-height: 4px;
  transition: background 0.2s ease, box-shadow 0.25s ease;
}

.cell.wall-n {
  border-top: 3px solid var(--stone);
  box-shadow: inset 0 2px 4px rgba(47, 74, 56, 0.15);
}

.cell.wall-e {
  border-right: 3px solid var(--stone);
}

.cell.wall-s {
  border-bottom: 3px solid var(--stone);
}

.cell.wall-w {
  border-left: 3px solid var(--stone);
}

.cell.start {
  background: radial-gradient(circle at 40% 35%, rgba(143, 212, 160, 0.9), var(--jade)) !important;
  box-shadow:
    inset 0 0 12px var(--jade-glow),
    0 0 14px rgba(90, 158, 111, 0.45);
}

.cell.end {
  background: radial-gradient(circle at 40% 35%, rgba(255, 140, 120, 0.95), #a03830) !important;
  box-shadow:
    inset 0 0 14px var(--ember-glow),
    0 0 18px rgba(201, 76, 61, 0.5);
}

.cell.player {
  background: radial-gradient(circle at 35% 30%, #ffd089, var(--amber)) !important;
  box-shadow:
    0 0 16px var(--amber-glow),
    0 0 28px rgba(232, 160, 69, 0.35),
    inset 0 0 6px rgba(255, 255, 255, 0.35);
  z-index: 5;
  animation: playerGlow 2.2s ease-in-out infinite;
}

@keyframes playerGlow {
  0%,
  100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.08);
  }
}

.cell.player-trail {
  background: linear-gradient(160deg, rgba(232, 160, 69, 0.35), var(--sand-deep)) !important;
}

.cell.visited-bfs {
  background: linear-gradient(160deg, rgba(94, 200, 232, 0.45), rgba(196, 181, 157, 0.85)) !important;
  box-shadow: inset 0 0 8px var(--cyan-glow);
}

.cell.visited-dfs {
  background: linear-gradient(160deg, rgba(232, 120, 58, 0.45), rgba(196, 181, 157, 0.82)) !important;
  box-shadow: inset 0 0 8px var(--fire-glow);
}

.cell.visited-dijkstra {
  background: linear-gradient(160deg, rgba(176, 124, 255, 0.42), rgba(196, 181, 157, 0.82)) !important;
  box-shadow: inset 0 0 8px var(--purple-glow);
}

.cell.frontier {
  outline: 2px solid rgba(255, 248, 234, 0.75);
  outline-offset: -2px;
  z-index: 1;
}

.cell.current {
  box-shadow: inset 0 0 0 3px rgba(255, 250, 240, 0.95);
  z-index: 2;
}

.cell.path-final,
.cell.path-final-bfs,
.cell.path-final-dfs,
.cell.path-final-dij {
  box-shadow:
    inset 0 0 6px rgba(255, 250, 240, 0.25),
    0 0 12px rgba(255, 255, 255, 0.15);
}

.cell.path-final-bfs {
  background: linear-gradient(160deg, rgba(120, 220, 255, 0.85), rgba(70, 160, 200, 0.75)) !important;
  box-shadow:
    inset 0 0 10px var(--cyan-glow),
    0 0 14px rgba(94, 200, 232, 0.45);
}

.cell.path-final-dfs {
  background: linear-gradient(160deg, rgba(255, 150, 80, 0.9), rgba(200, 90, 40, 0.8)) !important;
  box-shadow:
    inset 0 0 10px var(--fire-glow),
    0 0 14px rgba(232, 120, 58, 0.45);
}

.cell.path-final-dij {
  background: linear-gradient(160deg, rgba(200, 150, 255, 0.88), rgba(130, 80, 200, 0.78)) !important;
  box-shadow:
    inset 0 0 10px var(--purple-glow),
    0 0 14px rgba(176, 124, 255, 0.42);
}

.cell.hint-path {
  background: linear-gradient(160deg, rgba(94, 200, 232, 0.28), var(--sand)) !important;
  box-shadow: inset 0 0 10px var(--cyan-glow);
}

.cell.hint-next {
  outline: 2px solid var(--cyan-path);
  outline-offset: -2px;
  box-shadow: 0 0 16px rgba(94, 200, 232, 0.65);
  z-index: 4;
  animation: hintPulse 1.4s ease-in-out infinite;
}

@keyframes hintPulse {
  0%,
  100% {
    outline-color: var(--cyan-path);
  }
  50% {
    outline-color: #a8ecff;
  }
}

.frontier-bar {
  width: 100%;
  max-width: 760px;
  padding: 0.6rem 0.85rem;
  background: var(--surface2);
  border-radius: 8px;
  font-size: 0.8rem;
  border: 1px solid rgba(196, 181, 157, 0.1);
  word-break: break-word;
}

.frontier-label {
  color: var(--muted);
  margin-right: 0.35rem;
}

.frontier-content {
  color: var(--text);
}

/* Stats */
.stats {
  margin: 0;
}

.stats > div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(196, 181, 157, 0.08);
  font-size: 0.9rem;
}

.stats dt {
  margin: 0;
  color: var(--muted);
}

.stats dd {
  margin: 0;
  font-weight: 600;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.player-stats.hidden {
  display: none;
}

.sub-title {
  font-size: 0.95rem;
  margin: 1rem 0 0.6rem;
  font-weight: 700;
}

.comparison-box {
  margin-top: 0.5rem;
}

.table-wrap {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid rgba(196, 181, 157, 0.1);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.compare-table th,
.compare-table td {
  padding: 0.45rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid rgba(196, 181, 157, 0.08);
}

.compare-table th {
  color: var(--muted);
  font-weight: 600;
}

.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table .algo-bfs {
  color: var(--cyan-path);
}

.compare-table .algo-dfs {
  color: var(--fire-dfs);
}

.compare-table .algo-dij {
  color: var(--purple-dij);
}

.theory-panel {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(196, 181, 157, 0.1);
}

.theory-list {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.82rem;
  color: var(--muted);
}

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

.theory-list strong {
  color: var(--text);
}

.theory-note {
  font-size: 0.78rem;
  margin: 0.75rem 0 0;
  line-height: 1.45;
}

/* Legend */
.legend {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(196, 181, 157, 0.1);
}

.legend-title {
  font-size: 0.85rem;
  margin: 0 0 0.5rem;
  color: var(--muted);
}

.legend-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.78rem;
}

.legend-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.35rem 0;
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
  border: 1px solid rgba(0, 0, 0, 0.2);
}

.swatch.wall {
  background: var(--stone);
}

.swatch.path {
  background: var(--sand);
}

.swatch.start {
  background: var(--jade);
}

.swatch.end {
  background: #a03830;
}

.swatch.player-dot {
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber-glow);
}

.swatch.bfs-v {
  background: rgba(94, 200, 232, 0.55);
}

.swatch.dfs-v {
  background: rgba(232, 120, 58, 0.55);
}

.swatch.dij-v {
  background: rgba(176, 124, 255, 0.55);
}

.swatch.hint-p {
  background: rgba(94, 200, 232, 0.35);
}

/* Win modal */
.win-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(10, 8, 6, 0.82);
  backdrop-filter: blur(6px);
  animation: winFade 0.5s ease;
}

.win-overlay.hidden {
  display: none;
}

@keyframes winFade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.win-card {
  max-width: 26rem;
  width: 100%;
  padding: 2rem 1.75rem;
  border-radius: var(--radius);
  border: 1px solid rgba(201, 162, 39, 0.35);
  background: linear-gradient(155deg, #2e2820, #1a1612);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.55);
  text-align: center;
}

.win-kicker {
  font-family: var(--display);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.35rem;
}

.win-title {
  font-family: var(--display);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #f5edd8;
  margin: 0 0 1.25rem;
  text-shadow: 0 0 24px rgba(201, 162, 39, 0.35);
}

.win-stats {
  margin: 0 0 1rem;
  text-align: left;
}

.win-stats > div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(196, 181, 157, 0.1);
  font-size: 0.95rem;
}

.win-stats dt {
  margin: 0;
  color: var(--muted);
}

.win-stats dd {
  margin: 0;
  font-family: var(--mono);
  font-weight: 600;
}

.win-note {
  font-size: 0.8rem;
  margin: 0 0 1.25rem;
  text-align: left;
}

.win-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}