/*
 * Rails AI Agent - Multi-Agent Chat Design System
 * Three-column layout: Agent Sidebar | History | Chat Area
 */

/* ============================================
   1. DESIGN TOKENS
   ============================================ */
:root {
  /* Primary (Brand) */
  --color-primary-50: #f0f9ff;
  --color-primary-100: #e0f2fe;
  --color-primary-500: #0ea5e9;
  --color-primary-600: #0284c7;
  --color-primary-900: #0c4a6e;

  /* Functional */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #6366f1;

  /* Neutral */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-400: #94a3b8;
  --color-gray-600: #475569;
  --color-gray-900: #0f172a;

  /* Semantic aliases */
  --color-primary: var(--color-primary-500);
  --color-primary-hover: var(--color-primary-600);
  --color-primary-light: var(--color-primary-50);
  --color-bg: var(--color-gray-50);
  --color-surface: var(--color-white);
  --color-sidebar-bg: #0f172a;
  --color-sidebar-hover: #1e293b;
  --color-sidebar-active: #334155;
  --color-text: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-muted: var(--color-gray-400);
  --color-border: var(--color-gray-200);
  --color-error-bg: #fef2f2;
  --color-thinking: #8b5cf6;
  --color-thinking-bg: #f5f3ff;
  --color-tool: #3b82f6;
  --color-tool-bg: #eff6ff;

  /* Typography */
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease-out;
}

/* Dark theme tokens */
[data-theme="dark"] {
  --color-white: #0f172a;
  --color-gray-50: #1e293b;
  --color-gray-100: #334155;
  --color-gray-200: #475569;
  --color-gray-400: #94a3b8;
  --color-gray-600: #cbd5e1;
  --color-gray-900: #f8fafc;
}

/* ============================================
   2. RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

kbd {
  font: inherit;
}

/* ============================================
   3. CHAT LAYOUT — Three Columns
   ============================================ */
.chat-layout {
  display: flex;
  height: 100dvh;
  overflow: hidden;
}