/* === CSS Variables — Anthropic Design System === */
:root {
  /* Core palette — warm terracotta system */
  --bg-primary: #FAF9F6;
  --bg-card: #FFFFFF;
  --bg-dark: #1A1612;
  --bg-dark-hover: #2A2520;
  --bg-dark-elevated: #332E28;
  --bg-input: #F2EFEA;
  --bg-input-focus: #FFFFFF;
  --bg-user-msg: #D97757;
  --bg-assistant-msg: #FFFFFF;
  --bg-tool-card: #F5F3EF;
  --bg-permission: #FFF9F0;
  --text-primary: #1A1612;
  --text-secondary: #6B6560;
  --text-light: #FFFFFF;
  --text-muted: #9B9590;
  --text-inverse: #FAF9F6;
  --border: #E8E4DF;
  --border-light: #F0ECE7;
  --border-focus: #D97757;
  --accent: #D97757;
  --accent-hover: #C4684A;
  --accent-subtle: #FDF0EB;
  --green: #3B8A6A;
  --green-bg: #E8F5EE;
  --yellow: #C49A2C;
  --yellow-bg: #FFF8E8;
  --orange: #D07A3A;
  --orange-bg: #FFF3E8;
  --red: #C44040;
  --red-bg: #FDE8E8;
  --blue: #4A7FC4;
  --blue-bg: #E8F0FD;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow-sm: 0 1px 2px rgba(26, 22, 18, 0.04);
  --shadow: 0 1px 3px rgba(26, 22, 18, 0.06), 0 2px 8px rgba(26, 22, 18, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 22, 18, 0.08), 0 1px 4px rgba(26, 22, 18, 0.04);
  --shadow-lg: 0 8px 32px rgba(26, 22, 18, 0.10), 0 2px 8px rgba(26, 22, 18, 0.06);
  --font-display: "Bricolage Grotesque", system-ui, -apple-system, sans-serif;
  --font-sans: "Figtree", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Fira Code", "SF Mono", Menlo, monospace;
  --max-width: 880px;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
}

/* Subtle warm ambient light */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(217, 119, 87, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(217, 119, 87, 0.02) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(59, 138, 106, 0.02) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--accent-hover); }

button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }

.hidden { display: none !important; }

/* === Selection === */
::selection {
  background: rgba(217, 119, 87, 0.2);
  color: var(--text-primary);
}

/* === Focus Ring === */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }