/**
 * Version Notes:
 * File: /pwa/css/themes.css
 * Version: 0.0.1
 * Last Modified: 2026-04-03 02:00 PM
 * Changes:
 * - Three themes: dark (default), light, glass
 * - CSS custom properties for all colors
 * - Clean, minimal — inspired by Claude/ChatGPT aesthetic
 */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition: 150ms ease;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.15);
}

/* ============================================
   DARK THEME (default)
   ============================================ */
[data-theme="dark"] {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-tertiary: #1a1a1a;
  --bg-elevated: #1e1e1e;
  --bg-hover: #252525;
  --bg-active: #2a2a2a;

  --border-primary: #222222;
  --border-secondary: #2a2a2a;
  --border-active: #444444;

  --text-primary: #e8e8e8;
  --text-secondary: #999999;
  --text-tertiary: #666666;
  --text-inverse: #0a0a0a;

  --accent: #e8e8e8;
  --accent-hover: #ffffff;
  --accent-muted: #333333;

  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.1);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.1);
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.1);
  --info: #60a5fa;
  --info-bg: rgba(96, 165, 250, 0.1);

  --message-user-bg: #1e1e1e;
  --message-assistant-bg: transparent;
  --input-bg: #1a1a1a;
  --input-border: #2a2a2a;
  --input-focus: #444444;

  --sidebar-bg: #0a0a0a;
  --sidebar-border: #1a1a1a;
  --sidebar-active: #1a1a1a;

  --scrollbar-thumb: #333333;
  --scrollbar-track: transparent;

  color-scheme: dark;
}

/* ============================================
   LIGHT THEME
   ============================================ */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f9f9f9;
  --bg-tertiary: #f4f4f4;
  --bg-elevated: #ffffff;
  --bg-hover: #f0f0f0;
  --bg-active: #e8e8e8;

  --border-primary: #e5e5e5;
  --border-secondary: #eeeeee;
  --border-active: #cccccc;

  --text-primary: #171717;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --text-inverse: #ffffff;

  --accent: #171717;
  --accent-hover: #000000;
  --accent-muted: #f0f0f0;

  --success: #16a34a;
  --success-bg: rgba(22, 163, 74, 0.08);
  --warning: #d97706;
  --warning-bg: rgba(217, 119, 6, 0.08);
  --danger: #dc2626;
  --danger-bg: rgba(220, 38, 38, 0.08);
  --info: #2563eb;
  --info-bg: rgba(37, 99, 235, 0.08);

  --message-user-bg: #f4f4f4;
  --message-assistant-bg: transparent;
  --input-bg: #ffffff;
  --input-border: #e5e5e5;
  --input-focus: #cccccc;

  --sidebar-bg: #f9f9f9;
  --sidebar-border: #e5e5e5;
  --sidebar-active: #eeeeee;

  --scrollbar-thumb: #cccccc;
  --scrollbar-track: transparent;

  color-scheme: light;
}

/* ============================================
   LIQUID GLASS THEME
   ============================================ */
[data-theme="glass"] {
  --bg-primary: rgba(10, 10, 10, 0.85);
  --bg-secondary: rgba(20, 20, 20, 0.7);
  --bg-tertiary: rgba(30, 30, 30, 0.6);
  --bg-elevated: rgba(40, 40, 40, 0.5);
  --bg-hover: rgba(50, 50, 50, 0.5);
  --bg-active: rgba(60, 60, 60, 0.5);

  --border-primary: rgba(255, 255, 255, 0.08);
  --border-secondary: rgba(255, 255, 255, 0.05);
  --border-active: rgba(255, 255, 255, 0.15);

  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.55);
  --text-tertiary: rgba(255, 255, 255, 0.35);
  --text-inverse: #0a0a0a;

  --accent: rgba(255, 255, 255, 0.9);
  --accent-hover: #ffffff;
  --accent-muted: rgba(255, 255, 255, 0.05);

  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.12);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.12);
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.12);
  --info: #60a5fa;
  --info-bg: rgba(96, 165, 250, 0.12);

  --message-user-bg: rgba(255, 255, 255, 0.05);
  --message-assistant-bg: transparent;
  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus: rgba(255, 255, 255, 0.2);

  --sidebar-bg: rgba(10, 10, 10, 0.6);
  --sidebar-border: rgba(255, 255, 255, 0.06);
  --sidebar-active: rgba(255, 255, 255, 0.08);

  --scrollbar-thumb: rgba(255, 255, 255, 0.15);
  --scrollbar-track: transparent;

  color-scheme: dark;
}

[data-theme="glass"] body {
  background: linear-gradient(135deg, #0f0f1a 0%, #1a0f2e 25%, #0f1a2e 50%, #1a1a0f 75%, #0f0f1a 100%);
  background-attachment: fixed;
}

[data-theme="glass"] .sidebar,
[data-theme="glass"] .view-header {
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

[data-theme="glass"] .message-content {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* === END OF FILE (FILENAME: /pwa/css/themes.css) === */