:root {
  --bg-color: #0d1117;
  --panel-bg: #161b22;
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --accent-color: #58a6ff;
  --accent-glow: rgba(88, 166, 255, 0.4);
  --danger-color: #f85149;
  --success-color: #2ea043;
  --font-mono: 'Roboto Mono', monospace;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-mono);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

nav {
  padding: 1rem;
  background-color: var(--panel-bg);
  border-bottom: 1px solid #30363d;
}

nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav a:hover {
  color: var(--accent-color);
}

.main-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.header-section {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2.5rem;
  margin: 0;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-primary);
}

.highlight {
  color: var(--accent-color);
  text-shadow: 0 0 10px var(--accent-glow);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  letter-spacing: 1px;
}

.simulation-layout {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
}

.canvas-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.canvas-container {
  position: relative;
  border: 2px solid #30363d;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

canvas {
  display: block;
  background-color: #000;
  cursor: crosshair;
}

.canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.8);
}

.stats-bar {
  display: flex;
  justify-content: space-between;
  background-color: var(--panel-bg);
  padding: 0.8rem;
  border-radius: 4px;
  border: 1px solid #30363d;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--accent-color);
}

.controls-section {
  flex: 1;
  min-width: 300px;
  max-width: 400px;
  background-color: var(--panel-bg);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid #30363d;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.control-group h2 {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid #30363d;
  padding-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.input-wrapper {
  margin-bottom: 1.2rem;
}

.input-wrapper label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.slider {
  -webkit-appearance: none;
  width: 100%;

  .value-display {
    display: block;
    text-align: right;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-top: 0.2rem;
  }

  .actions {
    display: flex;
    gap: 1rem;
  }

  button {
    flex: 1;
    padding: 0.8rem;
    border: none;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9rem;
  }

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

  .btn-primary:hover {
    background-color: #3fb950;
    box-shadow: 0 0 15px rgba(46, 160, 67, 0.4);
  }

  .btn-secondary {
    background-color: #30363d;
    color: var(--text-primary);
  }

  .btn-secondary:hover {
    background-color: #484f58;
  }

  .btn-danger {
    background-color: rgba(248, 81, 73, 0.1);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
  }

  .btn-danger:hover {
    background-color: rgba(248, 81, 73, 0.2);
  }

  .instructions {
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    border-top: 1px solid #30363d;
    padding-top: 1rem;
  }

  /* Responsive adjustments */
  @media (max-width: 768px) {
    .simulation-layout {
      flex-direction: column;
      align-items: center;
    }

    .controls-section {
      width: 100%;
      max-width: none;
    }
  }