/* ============================================
   WizGist Design System — CSS Variables
   ============================================ */

:root {
    /* Brand Colors */
    --wiz-primary: #7c3aed;
    --wiz-primary-light: #a78bfa;
    --wiz-primary-dark: #5b21b6;
    --wiz-primary-glow: rgba(124, 58, 237, 0.3);
    --wiz-accent: #06b6d4;
    --wiz-accent-light: #67e8f9;
    --wiz-success: #10b981;
    --wiz-warning: #f59e0b;
    --wiz-danger: #ef4444;

    /* Mode Colors */
    --mode-developer: #3b82f6;
    --mode-writer: #ec4899;
    --mode-thinker: #8b5cf6;
    --mode-general: #06b6d4;

    /* Model Colors */
    --model-instant: #f59e0b;
    --model-turbo: #ef4444;

    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', 'Cascadia Code', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-glow: 0 0 20px var(--wiz-primary-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-collapsed: 0px;

    /* Header */
    --header-height: 60px;

    /* Z-Index Scale */
    --z-sidebar: 40;
    --z-header: 50;
    --z-dropdown: 60;
    --z-modal: 100;
    --z-toast: 110;
}

/* ============ LIGHT THEME ============ */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fb;
    --bg-tertiary: #f0f1f5;
    --bg-hover: #e8e9ed;
    --bg-active: #dddee3;
    --bg-chat: #f4f5f7;
    --bg-message-user: #7c3aed;
    --bg-message-ai: #ffffff;
    --bg-input: #ffffff;
    --bg-sidebar: #f8f9fb;
    --bg-code: #1e1e2e;
    --bg-thinking: #fef3c7;
    --bg-modal: #ffffff;
    --bg-overlay: rgba(0,0,0,0.5);

    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #9ca3af;
    --text-inverse: #ffffff;
    --text-on-primary: #ffffff;
    --text-link: #7c3aed;

    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --border-focus: #7c3aed;

    --scrollbar-track: #f1f1f1;
    --scrollbar-thumb: #c1c1c1;
}

/* ============ DARK THEME ============ */
[data-theme="dark"] {
    --bg-primary: #0f0f17;
    --bg-secondary: #16161f;
    --bg-tertiary: #1e1e2a;
    --bg-hover: #262636;
    --bg-active: #2e2e42;
    --bg-chat: #0f0f17;
    --bg-message-user: #7c3aed;
    --bg-message-ai: #1a1a28;
    --bg-input: #16161f;
    --bg-sidebar: #0c0c14;
    --bg-code: #0d0d15;
    --bg-thinking: #422006;
    --bg-modal: #16161f;
    --bg-overlay: rgba(0,0,0,0.7);

    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --text-inverse: #111827;
    --text-on-primary: #ffffff;
    --text-link: #a78bfa;

    --border-color: #2a2a3a;
    --border-light: #1f1f2f;
    --border-focus: #7c3aed;

    --scrollbar-track: #1a1a2a;
    --scrollbar-thumb: #3a3a4a;
}