:root {
  --bg-primary: #121214;
  --bg-secondary: #1E1E24;
  --bg-tertiary: #2A2A35;
  --text-primary: #FFFFFF;
  --text-secondary: #A0A0A0;
  --accent: #7C4DFF;
  --accent-hover: #651FFF;
  --danger: #FF5252;
  --border: #333340;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.app-header {
  padding: 1rem 2rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.app-header h1 {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #7C4DFF 0%, #00E5FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stats-bar {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.stats-bar span {
  font-weight: 600;
  color: var(--text-primary);
}

.workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.toolbar, .sidebar {
  background: var(--bg-secondary);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  border-right: 1px solid var(--border);
  width: 80px;
  align-items: center;
  z-index: 5;
}

.sidebar {
  width: 300px;
  border-left: 1px solid var(--border);
  border-right: none;
}

.tool-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.tool-btn, .action-btn {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-btn svg, .action-btn svg {
  width: 24px;
  height: 24px;
}

.tool-btn:hover, .action-btn:hover {
  background: var(--border);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.tool-btn.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 12px rgba(124, 77, 255, 0.4);
}

.action-btn.danger {
  color: var(--danger);
  background: transparent;
  border: 1px solid var(--danger);
}

.action-btn.danger:hover {
  background: var(--danger);
  color: white;
}

.color-picker-label {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid var(--border);
  transition: transform 0.2s ease;
}

.color-picker-label:hover {
  transform: scale(1.1);
  border-color: var(--text-primary);
}

#color-picker {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  cursor: pointer;
  opacity: 0;
}

.color-preview {
  display: block;
  width: 100%;
  height: 100%;
  background-color: #000; /* Default handled by JS */
}

.canvas-container {
  flex: 1;
  background-color: #0a0a0c;
  background-image: radial-gradient(#1E1E24 1px, transparent 1px);
  background-size: 20px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: auto;
  cursor: crosshair;
}

#pixel-canvas {
  background: white;
  box-shadow: var(--shadow);
  image-rendering: pixelated;
  /* Max size will be constrained by JS scaling, but basic constraints here */
  max-width: 90%;
  max-height: 90%;
}

.right-panel {
  justify-content: space-between;
}

.gallery-section {
  width: 100%;
  flex: 1;
  overflow-y: auto;
}

.gallery-section h2 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.gallery-item {
  aspect-ratio: 1;
  background: var(--bg-tertiary);
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s ease;
  background-size: cover;
  background-position: center;
  position: relative;
}

.gallery-item:hover {
  border-color: var(--accent);
  transform: scale(1.05);
}

.export-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.primary-btn, .secondary-btn {
  padding: 1rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: all 0.2s ease;
}

.primary-btn {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 12px rgba(124, 77, 255, 0.3);
}

.primary-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

.secondary-btn {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.secondary-btn:hover {
  background: var(--border);
}

/* Animations */
@keyframes shake {
  0% { transform: translate(1px, 1px) rotate(0deg); }
  10% { transform: translate(-1px, -2px) rotate(-1deg); }
  20% { transform: translate(-3px, 0px) rotate(1deg); }
  30% { transform: translate(3px, 2px) rotate(0deg); }
  40% { transform: translate(1px, -1px) rotate(1deg); }
  50% { transform: translate(-1px, 2px) rotate(-1deg); }
  60% { transform: translate(-3px, 1px) rotate(0deg); }
  70% { transform: translate(3px, 1px) rotate(-1deg); }
  80% { transform: translate(-1px, -1px) rotate(1deg); }
  90% { transform: translate(1px, 2px) rotate(0deg); }
  100% { transform: translate(1px, -2px) rotate(-1deg); }
}

.shake {
  animation: shake 0.5s;
  animation-iteration-count: 1;
}

@media (max-width: 768px) {
  .workspace {
    flex-direction: column;
  }

  .toolbar {
    width: 100%;
    height: auto;
    flex-direction: row;
    justify-content: center;
    padding: 0.5rem;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .sidebar {
    display: none; /* Hide sidebar on mobile for now, or make it collapsible */
    position: absolute;
    right: 0;
    top: 60px;
    bottom: 0;
    background: var(--bg-secondary);
    z-index: 100;
  }

  .canvas-container {
    height: 60vh;
  }
}