:root {
  --bg-color: #121212;
  --panel-bg: rgba(30, 30, 30, 0.85);
  --text-color: #e0e0e0;
  --accent-color: #00e5ff;
  --accent-hover: #00b8cc;
  --border-radius: 12px;
  --spacing: 16px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  width: 100vw;
  height: 100vh;
}

canvas#sketcher {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  cursor: crosshair;
  /* Create a subtle grid pattern for the canvas background */
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
}

.ui-container {
  position: absolute;
  top: 20px;
  left: 20px;
  width: 320px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  z-index: 10;
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: var(--spacing);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.3s ease;
}

.ui-container.collapsed {
  transform: translateX(calc(-100% - 40px));
}

.toggle-btn {
  position: absolute;
  top: 20px;
  left: 360px; /* 20px + 320px + 20px gap */
  z-index: 11;
  background: var(--panel-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  padding: 10px;
  border-radius: 50%;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: left 0.3s ease, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.ui-container.collapsed + .toggle-btn {
  left: 20px;
}

.toggle-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

h2 {
  margin-top: 0;
  font-size: 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 10px;
  margin-bottom: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--accent-color);
}

.control-group {
  margin-bottom: 20px;
}

.control-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 8px;
  color: #aaa;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* Inputs */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
  margin: 5px 0;
}

input[type="range"]::-webkit-slider-runnable-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  -webkit-appearance: none;
  margin-top: -5px;
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}

select {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  padding: 8px;
  border-radius: 6px;
  font-family: inherit;
  cursor: pointer;
}

select:focus {
  outline: none;
  border-color: var(--accent-color);
}

button.action-btn {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 6px;
  color: var(--text-color);
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  text-align: center;
}

button.action-btn:hover {
  background: var(--accent-color);
  color: #000;
}

.checkbox-row {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
  cursor: pointer;
}

.checkbox-row input[type="checkbox"] {
  margin-right: 10px;
  accent-color: var(--accent-color);
  width: 16px;
  height: 16px;
}

.checkbox-row span {
  font-size: 0.9rem;
}

details {
  background: rgba(0, 0, 0, 0.2);
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 15px;
}

details summary {
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: #ccc;
  outline: none;
}

details[open] summary {
  margin-bottom: 10px;
  color: var(--accent-color);
}

output {
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--accent-color);
  float: right;
}

/* Pickr customization */
.pickr {
  width: 100%;
}
.pcr-button {
  width: 100% !important;
  height: 36px !important;
  border-radius: 6px !important;
}

/* Scrollbar */
.ui-container::-webkit-scrollbar {
  width: 6px;
}
.ui-container::-webkit-scrollbar-track {
  background: transparent;
}
.ui-container::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
}
.ui-container::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

.log-output {
  margin-top: 20px;
  font-family: 'Courier New', monospace;
  font-size: 10px;
  color: #666;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 10px;
  max-height: 100px;
  overflow-y: auto;
}