/* Dark Mode Theme Tokens */
:root {
  /* Color Tokens - Semantic (Dark Theme) */
  --color-primary: #2a3046;
  --color-primary-hover: #3a4056;
  --color-secondary: #764BA2;
  --color-accent-pink: #F093FB;
  --color-accent-blue: #4FACFE;
  --color-accent-yellow: #FFD93D;
  --color-success: #10B981;
  --color-danger: #EF4444;
  
  /* Background Tokens */
  --bg-body: linear-gradient(135deg, #2a3046 0%, #764BA2 100%);
  --bg-surface: rgba(30, 30, 60, 0.9);
  --bg-surface-solid: rgba(15, 15, 35, 0.95);
  --bg-overlay: rgba(0, 0, 0, 0.75);
  --bg-input: rgba(255, 255, 255, 0.05);
  --bg-input-focus: rgba(255, 255, 255, 0.1);
  
  /* Text Tokens */
  --text-primary: #FFFFFF;
  --text-secondary: #B8C6DB;
  --text-muted: #64748B;
  --text-inverse: #1E293B;
  
  /* Border Tokens */
  --border-color: rgba(255, 255, 255, 0.2);
  --border-color-focus: rgba(102, 126, 234, 0.4);
  --border-color-muted: rgba(255, 255, 255, 0.1);
  
  /* Shadow Tokens (Dark theme optimized - softer, more diffused) */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15), 0 1px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2), 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.25), 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-focus: 0 0 0 3px rgba(102, 126, 234, 0.3);
  --shadow-button: 0 2px 8px rgba(102, 126, 234, 0.2);
  
  /* Elevation Tokens - Dark Theme Depth System (softer, more natural) */
  --elevation-1-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
  --elevation-2-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 2px 4px rgba(0, 0, 0, 0.12);
  --elevation-3-shadow: 0 6px 12px rgba(0, 0, 0, 0.2), 0 4px 8px rgba(0, 0, 0, 0.15);
  --text-shadow-base: 1px 1px 1px rgba(0, 0, 0, 0.25);
  --text-shadow-strong: 1px 1px 2px rgba(0, 0, 0, 0.4);
}

/* Dark theme specific component overrides */
.chat-message {
  background: rgba(102, 126, 234, 0.1);
  border: 1px solid rgba(102, 126, 234, 0.3);
}

.mermaid {
  background: rgba(255, 255, 255, 0.04);
}

.notes-textarea {
  background: rgba(255, 255, 255, 0.06);
}

.glass-col {
  background: rgba(255, 255, 255, 0.03);
}

.glass-modal {
  background: rgba(15, 15, 23, 0.78);
}

/* Dark theme scrollbar styles */
#chatMessages::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #4A5568, #2D3748);
}

#chatMessages::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #667EEA, #764BA2);
}

/* Dark theme input styling */
input {
  background: rgba(26, 32, 44, 0.8);
  border: 1px solid rgba(102, 126, 234, 0.3);
}

/* Dark theme demo styles for buttons.html */
.demo-section {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
}

.demo-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color-muted);
}

.code-block {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color-muted);
  color: var(--text-secondary);
}