:root {
  --background-color: #111;
  --text-color: #eee;
  --primary-color: #00aaff;
  --panel-background: rgba(42, 42, 42, 0.8);
  --border-color: #555;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  background-color: var(--background-color);
  color: var(--text-color);
  overflow: hidden; /* Hide scrollbars as canvas will be fullscreen */
}

header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  background-color: transparent;
  padding: 1rem;
  text-align: center;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-link {
  color: var(--text-color);
  text-decoration: none;
  font-size: 1.2rem;
  transition: color 0.3s ease;
}

.back-link:hover {
  color: var(--primary-color);
}

h1 {
    margin: 0;
    font-size: 1.8rem;
    text-shadow: 0 0 10px var(--primary-color);
}

footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  text-align: center;
  padding: 1rem;
  color: #888;
  z-index: 10;
}

#container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

#controls {
  position: absolute;
  top: 80px;
  right: 20px;
  background: var(--panel-background);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.5rem;
  width: 320px;
  z-index: 5;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

#controls h2 {
  margin-top: 0;
  text-align: center;
  color: var(--primary-color);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

.control-row {
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
}

.control-row label {
  margin-bottom: 0.5rem;
}

.control-row select,
.control-row input[type="range"] {
  width: 100%;
  padding: 0.5rem;
  background: #333;
  border: 1px solid #555;
  border-radius: 5px;
  color: var(--text-color);
}

.control-row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  background: #444;
  outline: none;
  opacity: 0.7;
  transition: opacity .2s;
}

.control-row input[type="range"]:hover {
  opacity: 1;
}

.control-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--primary-color);
  cursor: pointer;
  border-radius: 50%;
  border: 2px solid var(--background-color);
}

.control-row input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--primary-color);
  cursor: pointer;
  border-radius: 50%;
  border: 2px solid var(--background-color);
}

.control-row span, .info-row span {
    text-align: right;
    font-size: 0.9em;
    color: #ccc;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
}

#reset-btn {
  width: 100%;
  padding: 0.8rem;
  background-color: var(--primary-color);
  color: var(--background-color);
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: bold;
  transition: background-color 0.3s, transform 0.1s;
  margin-top: 1rem;
}

#reset-btn:hover {
  background-color: #00bfff;
}

#reset-btn:active {
    transform: scale(0.98);
}

@media (max-width: 600px) {
    header {
        flex-direction: column;
        gap: 1rem;
    }
    #controls {
        width: calc(100% - 40px);
        top: 150px;
        left: 20px;
        right: 20px;
    }
}