* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

:root {
  /* Pixel Art Monochrome Palette (Undertale/Omori inspired) */
  --pixel-black: #000000;
  --pixel-darkgray: #2a2a2a;
  --pixel-gray: #555555;
  --pixel-lightgray: #a0a0a0;
  --pixel-white: #ffffff;

  /* Accent colors (green/red for BFS/DFS, yellow for path) */
  --pixel-accent: #ffffff;
  --pixel-bfs: #4ade80;
  --pixel-dfs: #ef4444;
  --pixel-path: #fbbf24;

  /* UI elements */
  --bg-main: #1a1a1a;
  --bg-pattern: #0d0d0d;
  --border-pixel: #555555;
  --shadow-pixel: rgba(0, 0, 0, 0.5);
}
body {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  background: var(--bg-main);
  font-family: "Courier New", "Consolas", monospace;
  color: var(--pixel-white);
  padding: 20px;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    var(--bg-pattern) 2px,
    var(--bg-pattern) 4px
  );
}

.container {
  max-width: 1400px;
  width: 100%;
}

h1 {
  text-align: center;
  margin-bottom: 15px;
  font-size: 2.2em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--pixel-white);
  text-shadow: 3px 3px 0 var(--pixel-black), 3px -3px 0 var(--pixel-black),
    -3px 3px 0 var(--pixel-black), -3px -3px 0 var(--pixel-black);
}

.info-icon,
.music-btn {
  background: var(--pixel-black);
  border: 3px solid var(--pixel-white);
  border-radius: 0;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  color: var(--pixel-white);
  box-shadow: inset -2px -2px 0 var(--pixel-darkgray),
    3px 3px 0 var(--shadow-pixel);
  transition: transform 0.1s;
}

.info-icon:hover,
.music-btn:hover {
  transform: translate(1px, 1px);
  box-shadow: inset -2px -2px 0 var(--pixel-darkgray),
    2px 2px 0 var(--shadow-pixel);
}

.info-icon:active,
.music-btn:active {
  transform: translate(2px, 2px);
  box-shadow: inset 2px 2px 0 var(--pixel-darkgray),
    1px 1px 0 var(--shadow-pixel);
}

.music-btn.music-on {
  background: var(--pixel-white);
  color: var(--pixel-black);
  border-color: var(--pixel-white);
}

.info-icon svg,
.music-btn svg {
  pointer-events: none;
}

.subtitle {
  text-align: center;
  margin-bottom: 25px;
  font-size: 0.95em;
  letter-spacing: 1px;
  color: var(--pixel-lightgray);
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1.5fr 0.5fr 1fr;
  gap: 15px;
  margin-bottom: 25px;
  background: var(--pixel-black);
  padding: 20px;
  border: 4px solid var(--pixel-white);
  box-shadow: inset 0 0 0 2px var(--pixel-darkgray),
    6px 6px 0 var(--shadow-pixel);
}

.control-group {
  background: var(--pixel-darkgray);
  padding: 12px;
  border: 2px solid var(--pixel-gray);
  position: relative;
}

/* Pixel corner decorations */
.control-group::before,
.control-group::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--pixel-white);
}

.control-group::before {
  top: -2px;
  left: -2px;
}

.control-group::after {
  bottom: -2px;
  right: -2px;
}

.group-label {
  font-size: 0.75em;
  font-weight: 700;
  margin-bottom: 10px;
  text-align: center;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--pixel-white);
}

.button-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.size-group,
.speed-group {
  flex-direction: row;
  justify-content: center;
}

button {
  padding: 10px 18px;
  font-size: 13px;
  font-family: "Courier New", monospace;
  font-weight: 700;
  border: 3px solid var(--pixel-white);
  border-radius: 0;
  cursor: pointer;
  background: var(--pixel-black);
  color: var(--pixel-white);
  letter-spacing: 1px;
  text-transform: uppercase;
  box-shadow: inset -2px -2px 0 var(--pixel-darkgray),
    3px 3px 0 var(--shadow-pixel);
  transition: transform 0.1s, box-shadow 0.1s;
}

button:hover:not(:disabled) {
  transform: translate(1px, 1px);
  box-shadow: inset -2px -2px 0 var(--pixel-darkgray),
    2px 2px 0 var(--shadow-pixel);
}

button:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: inset 2px 2px 0 var(--pixel-darkgray),
    1px 1px 0 var(--shadow-pixel);
}

button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Button variants */
.primary-btn,
.secondary-btn,
.solve-btn,
.bfs-btn,
.dfs-btn {
  background: var(--pixel-white);
  color: var(--pixel-black);
  border-color: var(--pixel-white);
}

.size-btn,
.speed-btn {
  flex: 1;
  font-size: 11px;
  padding: 8px 10px;
  background: var(--pixel-darkgray);
  color: var(--pixel-lightgray);
  border-color: var(--pixel-gray);
  box-shadow: inset -1px -1px 0 var(--pixel-black),
    2px 2px 0 var(--shadow-pixel);
}

.size-btn.active,
.speed-btn.active {
  background: var(--pixel-white);
  color: var(--pixel-black);
  border-color: var(--pixel-white);
}

.maze-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.maze-wrapper {
  background: var(--pixel-black);
  padding: 18px;
  border: 4px solid var(--pixel-white);
  box-shadow: inset 0 0 0 2px var(--pixel-darkgray),
    6px 6px 0 var(--shadow-pixel);
  position: relative;
}

/* Add pixel corner markers */
.maze-wrapper::before,
.maze-wrapper::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--pixel-white);
  border: 2px solid var(--pixel-black);
}

.maze-wrapper::before {
  top: -2px;
  left: -2px;
}

.maze-wrapper::after {
  bottom: -2px;
  right: -2px;
}

.maze-title {
  text-align: center;
  font-size: 1.3em;
  margin-bottom: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-family: "Courier New", monospace;
}

.bfs-title {
  color: var(--pixel-bfs);
  text-shadow: 2px 2px 0 var(--pixel-black);
}

.dfs-title {
  color: var(--pixel-dfs);
  text-shadow: 2px 2px 0 var(--pixel-black);
}

canvas {
  display: block;
  margin: 0 auto;
  border: 3px solid var(--pixel-white);
  background: var(--pixel-black);
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  box-shadow: inset 0 0 0 1px var(--pixel-darkgray);
}

.stats {
  margin-top: 15px;
  padding: 12px;
  background: var(--pixel-darkgray);
  border: 2px solid var(--pixel-gray);
  font-size: 0.9em;
  font-family: "Courier New", monospace;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  margin: 4px 0;
  padding: 2px 0;
}

.stat-row::before {
  content: "▸ ";
  color: var(--pixel-white);
  margin-right: 4px;
}

.stat-label {
  color: var(--pixel-lightgray);
  font-weight: 700;
  flex: 0 0 auto;
}

.stat-value {
  font-weight: 700;
  color: var(--pixel-white);
  flex: 0 0 auto;
  margin-left: auto;
}

.legend {
  background: var(--pixel-black);
  padding: 15px;
  border: 4px solid var(--pixel-white);
  text-align: center;
  box-shadow: inset 0 0 0 2px var(--pixel-darkgray),
    6px 6px 0 var(--shadow-pixel);
  font-family: "Courier New", monospace;
}

.legend strong {
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 0.9em;
}

.legend-items {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 12px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85em;
  letter-spacing: 1px;
}

.legend-box {
  width: 18px;
  height: 18px;
  border: 2px solid var(--pixel-white);
  image-rendering: pixelated;
}

/* Footer */
.footer {
  margin-top: 25px;
  padding: 12px;
  text-align: center;
  font-size: 0.85em;
  font-family: "Courier New", monospace;
  letter-spacing: 1px;
  color: var(--pixel-gray);
}

.footer a {
  color: var(--pixel-white);
  text-decoration: none;
  border-bottom: 2px dotted var(--pixel-gray);
  padding-bottom: 2px;
}

.footer a:hover {
  border-bottom-color: var(--pixel-white);
}

/* Info Overlay Styles */
.info-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  z-index: 1000;
  overflow-y: auto;
  padding: 20px;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.02) 3px,
    rgba(255, 255, 255, 0.02) 6px
  );
}

.info-overlay.active {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.info-content {
  background: var(--pixel-black);
  padding: 30px;
  max-width: 800px;
  width: 100%;
  position: relative;
  margin: 40px auto;
  border: 4px solid var(--pixel-white);
  box-shadow: inset 0 0 0 2px var(--pixel-darkgray),
    8px 8px 0 var(--shadow-pixel);
  font-family: "Courier New", monospace;
}

.info-close {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--pixel-white);
  border: 3px solid var(--pixel-black);
  width: 32px;
  height: 32px;
  font-size: 20px;
  font-weight: 700;
  color: var(--pixel-black);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  padding: 0;
  box-shadow: 2px 2px 0 var(--shadow-pixel);
}

.info-close:hover {
  background: var(--pixel-lightgray);
}

.info-close:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--shadow-pixel);
}

.info-content h2 {
  margin-bottom: 25px;
  font-size: 1.6em;
  color: var(--pixel-white);
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  text-align: center;
  border-bottom: 3px solid var(--pixel-white);
  padding-bottom: 12px;
}

.info-section {
  margin-bottom: 20px;
  background: var(--pixel-darkgray);
  padding: 15px;
  border: 2px solid var(--pixel-gray);
  position: relative;
}

.info-section::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 6px;
  height: 6px;
  background: var(--pixel-white);
}

.info-section h3 {
  margin-bottom: 10px;
  font-size: 1.1em;
  color: var(--pixel-white);
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.info-section p {
  margin-bottom: 10px;
  color: var(--pixel-lightgray);
  line-height: 1.7;
  font-size: 0.95em;
}

.info-footer {
  background: var(--pixel-darkgray);
  padding: 12px;
  border: 2px solid var(--pixel-gray);
  text-align: center;
  margin-top: 15px;
}

.info-footer p {
  margin: 0;
  color: var(--pixel-lightgray);
  font-style: italic;
}

@media (max-width: 1200px) {
  .maze-container {
    grid-template-columns: 1fr;
  }

  .controls {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .controls {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 1.5em;
    gap: 10px;
  }

  .subtitle {
    font-size: 1em;
  }

  .info-content {
    padding: 25px;
    margin: 20px auto;
  }

  .info-content h2 {
    font-size: 1.5em;
  }

  canvas {
    max-width: 100%;
    height: auto;
  }

  .maze-wrapper {
    padding: 12px;
  }

  .maze-title {
    font-size: 1.1em;
  }
}

@media (max-width: 480px) {
  .button-group {
    gap: 6px;
  }

  button {
    font-size: 11px;
    padding: 8px 12px;
  }

  .info-overlay {
    padding: 10px;
  }

  .info-content {
    padding: 20px;
  }

  .info-section {
    padding: 15px;
  }

  h1 {
    font-size: 1.2em;
    letter-spacing: 1px;
  }

  .info-icon,
  .music-btn {
    width: 35px;
    height: 35px;
  }

  .info-icon svg,
  .music-btn svg {
    width: 16px;
    height: 16px;
  }

  .maze-wrapper {
    padding: 8px;
  }

  .maze-title {
    font-size: 0.9em;
    margin-bottom: 8px;
  }

  .stats {
    font-size: 0.8em;
    padding: 8px;
  }

  .legend {
    padding: 12px;
  }

  .legend-items {
    gap: 10px;
  }

  .legend-item {
    font-size: 0.75em;
  }
}