:root {
  --blood: #ff0033;
  --dark-blood: #8b0000;
  --panel-bg: rgba(10, 0, 3, 0.82);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: 'VT323', monospace;
  cursor: default;
}

#canvas {
  display: block;
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
}

#disclaimer {
  position: fixed;
  top: 14px;
  right: 16px;
  z-index: 20;
  font-family: 'Major Mono Display', monospace;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--blood);
  text-shadow: 0 0 8px var(--blood), 0 0 2px #fff;
  opacity: 0.85;
  transition: opacity 2.5s ease;
  animation: flicker 0.15s infinite;
  pointer-events: none;
  max-width: 60vw;
  text-align: right;
}

@keyframes flicker {
  0%, 100% { opacity: 0.85; }
  92% { opacity: 0.85; }
  93% { opacity: 0.2; }
  95% { opacity: 0.9; }
  97% { opacity: 0.4; }
}

#controls {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 30;
  width: min(680px, 94vw);
  background: var(--panel-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 0, 51, 0.5);
  border-radius: 10px;
  padding: 14px 18px 10px;
  box-shadow: 0 0 30px rgba(255, 0, 51, 0.25), inset 0 0 20px rgba(255,0,51,0.08);
  transition: opacity 0.6s ease, transform 0.6s ease;
  color: #ffe4e4;
}

#controls.hidden-panel {
  opacity: 0.04;
  transform: translateX(-50%) translateY(6px);
  pointer-events: none;
}

.panel-title {
  text-align: center;
  font-family: 'Major Mono Display', monospace;
  font-size: 15px;
  letter-spacing: 2px;
  color: var(--blood);
  text-shadow: 0 0 10px var(--blood);
  margin-bottom: 10px;
}

.ctrl-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 19px;
}

.ctrl-row label {
  flex: 0 0 90px;
  color: #ff9a9a;
  letter-spacing: 1px;
}

.ctrl-row input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: linear-gradient(90deg, #3a0000, var(--blood));
  border-radius: 4px;
  outline: none;
}
.ctrl-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--blood);
  box-shadow: 0 0 8px var(--blood);
  cursor: pointer;
}
.ctrl-row input[type=range]::-moz-range-thumb {
  width: 16px; height: 16px; border: none;
  border-radius: 50%;
  background: var(--blood);
  box-shadow: 0 0 8px var(--blood);
  cursor: pointer;
}

.val {
  flex: 0 0 34px;
  text-align: right;
  color: var(--blood);
  text-shadow: 0 0 6px var(--blood);
}

.hue-row, .btn-row {
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}

.hue-btn, .btn-row button {
  font-family: 'VT323', monospace;
  font-size: 15px;
  letter-spacing: 1px;
  color: #ff9a9a;
  background: rgba(40, 0, 6, 0.6);
  border: 1px solid rgba(255, 0, 51, 0.4);
  border-radius: 5px;
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.hue-btn:hover, .btn-row button:hover {
  background: rgba(120, 0, 15, 0.7);
  color: #fff;
}
.hue-btn.active, .btn-row button.active {
  background: var(--dark-blood);
  color: #fff;
  border-color: var(--blood);
  box-shadow: 0 0 12px var(--blood);
}

.footer {
  text-align: center;
  margin-top: 8px;
  font-size: 13px;
  color: #7a4a4a;
  letter-spacing: 1px;
}
.footer a {
  color: var(--blood);
  text-decoration: none;
}
.footer a:hover {
  text-shadow: 0 0 8px var(--blood);
  text-decoration: underline;
}

@media (max-width: 480px) {
  .ctrl-row { font-size: 17px; }
  .ctrl-row label { flex: 0 0 74px; }
  .panel-title { font-size: 13px; }
  #disclaimer { font-size: 10px; }
}