/* ========================================
   CSS Variables (legacy theme)
   ======================================== */
:root {
    --font-family-base: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'Fira Code', 'SFMono-Regular', Consolas, Monaco, Menlo, monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --line-height-tight: 1.3;
    --line-height-normal: 1.45;
    --line-height-relaxed: 1.6;
    --space-2xs: 4px;
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 16px;
    --space-lg: 20px;
    --space-xl: 24px;
    --space-2xl: 32px;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-pill: 999px;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;
    --color-neutral-50: #f8fafc;
    --color-neutral-100: #f1f5f9;
    --color-neutral-200: #e2e8f0;
    --color-neutral-300: #cbd5f5;
    --color-neutral-400: #94a3b8;
    --color-neutral-500: #64748b;
    --color-neutral-600: #475569;
    --color-neutral-700: #334155;
    --color-neutral-800: #1e293b;
    --color-neutral-900: #0f172a;
    --color-success-500: #22c55e;
    --color-warning-500: #eab308;
    --color-danger-500: #ef4444;
    --surface-0: #ffffff;
    --surface-1: #f8fafc;
    --surface-2: #eef2ff;
    --bg-light: #f5f7fa;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --border-color: rgba(15, 23, 42, 0.08);
    --border-subtle: rgba(15, 23, 42, 0.05);
    --shadow-0: 0 0 0 rgba(0, 0, 0, 0);
    --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.08);
    --shadow-2: 0 8px 24px rgba(15, 23, 42, 0.12);
    --shadow-3: 0 20px 40px rgba(15, 23, 42, 0.16);
    --header-bg: linear-gradient(135deg, #23282d 0%, #2c3338 100%);
    --header-border: #333;
    --header-height: 40px;
    --header-height-mobile: 44px;
    --sidebar-width: 192px;
    --sidebar-collapsed-width: 36px;
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
}
