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

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --text-primary: #eaeaea;
  --text-secondary: #a0a0a0;
  --accent: #e94560;
  --accent-hover: #ff6b6b;
  --border: #2a2a4a;
  --success: #4ade80;
}

body {
  font-family: 'Courier New', monospace;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

.header {
  text-align: center;
  margin-bottom: 30px;
}

.header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

section {
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.seed-section {
  background: var(--bg-tertiary);
}

.seed-input-group {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.seed-input-group label {
  font-weight: bold;
  font-size: 1.1rem;
}

#seed-input {
  flex: 1;
  min-width: 200px;
  padding: 10px 15px;
  background: var(--bg-primary);
  border: 2px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  font-family: 'Courier New', monospace;
  font-size: 1rem;
}

#seed-input:focus {
  outline: none;
  border-color: var(--accent);
}

.btn {
  padding: 10px 20px;
  border: 2px solid var(--border);
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(233, 69, 96, 0.3);
}

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

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

.controls-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-group label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

select, input[type="range"] {
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 2px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  cursor: pointer;
}

select:focus, input[type="range"]:focus {
  outline: none;
  border-color: var(--accent);
}

input[type="range"] {
  width: 100%;
}

.canvas-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
  background: var(--bg-primary);
}

.canvas-wrapper {
  border: 4px solid var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

#pixel-canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

.actions-section {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-large {
  padding: 15px 30px;
  font-size: 1.1rem;
}

.palette-section h3 {
  margin-bottom: 15px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.palette-preview {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.palette-color {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s;
}

.palette-color:hover {
  transform: scale(1.1);
  border-color: var(--accent);
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 1.8rem;
  }

  .seed-input-group {
    flex-direction: column;
    align-items: stretch;
  }

  .seed-input-group label {
    text-align: center;
  }

  #seed-input {
    min-width: auto;
  }

  .controls-section {
    grid-template-columns: 1fr;
  }

  .actions-section {
    flex-direction: column;
  }

  .btn-large {
    width: 100%;
  }
}