/* === CUSTOM FONT === */
@font-face {
  font-family: 'Spleen';
  src: url('spleen.otf') format('opentype');
  font-weight: normal;
  font-style: normal;
}

/* === RESET & BASE === */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #e0e0e0;
  --bg-dark: #c0c0c0;
  --bg-light: #ececec;
  --white: #ffffff;
  --black: #000000;
  --green: #00d800;
  --pink: #e83080;
  --border-light: #f0f0f0;
  --border-dark: #808080;
  --border-darker: #404040;
  --font: 'VT323', 'Courier New', monospace;
  --font-spleen: 'Spleen', 'Courier New', monospace;
  --font-mono: 'Space Mono', monospace;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--black);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 16px;
  cursor: url('img/cursor-32.png') 16 0, auto;
}

canvas {
  cursor: url('img/cursor-32.png') 16 0, auto;
}

a, button, [role="button"], input[type="range"] {
  cursor: url('img/handcursor-64.png') 20 0, pointer;
  -webkit-font-smoothing: none;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: url('img/texture-bg.jpg') center / cover;
  opacity: 0.09;
  pointer-events: none;
  z-index: 9999;
}

/* === 3D BORDER HELPERS === */
.raised {
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
}

.inset {
  border: 2px solid;
  border-color: var(--border-dark) var(--border-light) var(--border-light) var(--border-dark);
}

/* === TOP NAV === */
.topnav {
  display: flex;
  justify-content: center;
  gap: 0;
  border-bottom: 2px solid var(--border-dark);
  background: var(--bg);
  padding: 0;
}

.nav-link {
  flex: 1;
  text-align: center;
  padding: 8px 24px;
  text-decoration: none;
  color: var(--black);
  font-family: var(--font-spleen);
  font-size: 18px;
  border-right: 1px solid var(--border-dark);
  border-left: 1px solid var(--border-light);
  transition: background 0.1s;
}

.nav-link:first-child {
  border-left: none;
}

.nav-link:last-child {
  border-right: none;
}

.nav-link:hover {
  background: var(--bg-light);
}

.nav-link.active {
  background: var(--bg-dark);
}

/* === MAIN LAYOUT === */
.main {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* === SIDEBAR === */
.sidebar {
  width: 180px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-right: 2px solid var(--border-dark);
  background: var(--bg);
}

.panel {
  border-bottom: 2px solid var(--border-dark);
  padding: 8px 10px;
}

.panel-label {
  font-family: var(--font-spleen);
  font-size: 16px;
  color: var(--black);
  margin-bottom: 4px;
  font-weight: normal;
}

/* Preview */
.preview-panel {
  padding: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
}

#previewImg {
  width: 140px;
  height: 140px;
  display: block;
  background: var(--white);
  border: 2px solid;
  border-color: var(--border-dark) var(--border-light) var(--border-light) var(--border-dark);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  object-fit: contain;
}

/* Preset List */
.preset-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.preset-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 3px 8px 3px 16px;
  background: transparent;
  border: none;
  font-family: var(--font-spleen);
  font-size: 16px;
  color: var(--black);
  cursor: url('img/handcursor-64.png') 20 0, pointer;
  transition: background 0.1s;
}

.preset-item:hover {
  background: var(--bg-dark);
}

.preset-item.active {
  color: var(--green);
  font-weight: normal;
}

/* === SLIDERS === */
.slider-panel {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
}

.slider-panel .panel-label {
  margin-bottom: 0;
  white-space: nowrap;
  min-width: 70px;
}

.retro-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 8px;
  background: linear-gradient(to right, var(--pink) 0%, var(--pink) var(--val, 50%), var(--bg-dark) var(--val, 50%), var(--bg-dark) 100%);
  border: 2px solid;
  border-color: var(--border-dark) var(--border-light) var(--border-light) var(--border-dark);
  border-radius: 0;
  outline: none;
  cursor: url('img/handcursor-64.png') 20 0, pointer;
}

.retro-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 18px;
  background: var(--bg-light);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  border-radius: 0;
  cursor: url('img/handcursor-64.png') 20 0, pointer;
}

.retro-slider::-moz-range-thumb {
  width: 14px;
  height: 18px;
  background: var(--bg-light);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  border-radius: 0;
  cursor: url('img/handcursor-64.png') 20 0, pointer;
}

/* === CANVAS AREA === */
.canvas-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--bg);
  min-height: 0;
}

#canvas {
  display: block;
  background: var(--white);
  border: 2px solid;
  border-color: var(--border-dark) var(--border-light) var(--border-light) var(--border-dark);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* === ACTION BAR === */
.action-bar {
  display: flex;
  align-items: stretch;
  border-top: 2px solid var(--border-dark);
  background: var(--bg);
  min-height: 60px;
}

.action-label {
  font-family: var(--font-spleen);
  font-size: 16px;
  color: var(--black);
  padding: 6px 12px;
  border-right: 2px solid var(--border-dark);
  display: flex;
  align-items: flex-start;
}

.action-buttons {
  display: flex;
  flex: 1;
  gap: 0;
}

.action-btn {
  flex: 1;
  padding: 10px 20px;
  background: var(--bg);
  border: none;
  border-right: 2px solid var(--border-dark);
  font-family: var(--font-spleen);
  font-size: 32px;
  color: var(--black);
  cursor: url('img/handcursor-64.png') 20 0, pointer !important;
  transition: background 0.1s;
  letter-spacing: 1px;
}

.action-btn, .action-btn * {
  cursor: url('img/handcursor-64.png') 20 0, pointer !important;
}

.action-btn:last-child {
  border-right: none;
}

.action-btn:hover {
  background: var(--bg-dark);
}

.action-btn:active {
  background: var(--bg-dark);
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
}

.action-btn.green {
  color: var(--green);
}

.action-btn.animating {
  color: var(--pink);
}

/* === FOOTER === */
.footer {
  display: flex;
  align-items: center;
  padding: 4px 10px;
  border-top: 1px solid var(--border-dark);
  background: var(--bg);
  font-family: var(--font);
  font-size: 14px;
  color: var(--black);
  gap: 16px;
}

.footer-icon {
  font-size: 16px;
}

.footer-credits {
  font-size: 14px;
  font-family: var(--font-spleen);
}

.footer-credits.right {
  margin-left: auto;
}

/* === RESPONSIVE === */
@media (max-width: 700px) {

  /* --- Nav: 2×2 grid so links never squash --- */
  .topnav {
    flex-wrap: wrap;
  }
  .nav-link {
    flex: 0 0 50%;
    border-right: none;
    border-left: none;
    border-bottom: 1px solid var(--border-dark);
    font-size: 15px;
    padding: 10px 8px;
  }
  .nav-link:nth-child(odd)  { border-right: 1px solid var(--border-dark); }
  .nav-link:nth-child(3),
  .nav-link:nth-child(4)    { border-bottom: none; }

  /* --- Automata layout --- */
  .main {
    flex-direction: column;
  }

  /* Sidebar becomes a compact horizontal scroll strip */
  .sidebar {
    width: 100%;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-right: none;
    border-bottom: 2px solid var(--border-dark);
  }

  /* Hide the preview thumbnail — save vertical space */
  .preview-panel {
    display: none;
  }

  .sidebar .panel {
    flex: 0 0 auto;
    min-width: 120px;
    border-right: 1px solid var(--border-dark);
    border-bottom: none;
  }

  .panel-label {
    font-size: 13px;
  }

  .preset-item {
    font-size: 14px;
    padding: 6px 6px 6px 10px;
  }

  .slider-panel {
    flex-direction: column;
    gap: 4px;
    padding: 6px 8px;
    min-width: 100px;
  }

  .slider-panel .panel-label {
    min-width: unset;
  }

  .retro-slider {
    width: 100%;
  }

  /* Canvas area */
  .canvas-wrap {
    padding: 8px;
  }

  /* Action bar — bigger tap targets */
  .action-bar {
    min-height: 54px;
  }

  .action-label {
    display: none; /* hide "actions" label, save space */
  }

  .action-btn {
    font-size: 18px;
    padding: 8px 6px;
    min-height: 54px;
  }

  /* Footer — prevent overflow on narrow screens */
  .footer {
    flex-wrap: wrap;
    font-size: 12px;
    gap: 6px;
    padding: 4px 8px;
  }

  .footer-credits.right {
    margin-left: 0;
  }
}