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

body {
  font-family: "Arial", sans-serif;
  background: #1a1a1a;
  color: #fff;
  overflow: hidden;
}

#app {
  position: relative;
  width: 100vw;
  height: 100vh;
}

#sprayCanvas {
  display: block;
  background: #fff;
  cursor: crosshair;
  position: absolute;
  top: 0;
  left: 0;
}

#controls {
  position: fixed;
  top: 20px;
  left: 20px;
  background: rgba(0, 0, 0, 0.85);
  padding: 20px;
  border-radius: 12px;
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 1000;
  min-width: 280px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.control-group {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.control-group:last-child {
  margin-bottom: 0;
}

label {
  font-size: 14px;
  font-weight: bold;
  min-width: 80px;
  color: #fff;
}

input[type="color"] {
  width: 40px;
  height: 30px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

input[type="range"] {
  flex: 1;
  height: 6px;
  background: #333;
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, #fff, #f0f0f0);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
  transition: all 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, #fff, #f0f0f0);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
  transition: all 0.2s ease;
}

input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: #fff;
  cursor: pointer;
}

span {
  font-size: 12px;
  color: #ccc;
  min-width: 40px;
  text-align: right;
}

button {
  background: #333;
  color: #fff;
  border: 1px solid #555;
  padding: 8px 16px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s ease;
}

button:hover {
  background: #444;
  border-color: #666;
}

button:active {
  background: #222;
}

#clearBtn {
  background: #d32f2f;
  border-color: #f44336;
}

#clearBtn:hover {
  background: #f44336;
}

#exportBtn {
  background: #1976d2;
  border-color: #2196f3;
}

#exportBtn:hover {
  background: #2196f3;
}

.control-group:last-child {
  display: flex;
  gap: 10px;
}

.control-group:last-child button {
  flex: 1;
}

.help-text {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.help-text small {
  color: #888;
  font-size: 11px;
  line-height: 1.4;
}

/* Color preset buttons */
.color-presets {
  display: flex;
  gap: 8px;
}

.color-preset-btn {
  width: 32px;
  height: 32px;
  border: 2px solid #555;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.color-preset-btn:hover {
  border-color: #fff;
  transform: scale(1.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.color-preset-btn:active {
  transform: scale(0.95);
}

.color-preset-btn.active {
  border-color: #fff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
}