/**
 * Design Tokens - CSS Custom Properties
 * Local First Tools v2
 */

:root {
    /* ========================================
       COLOR SYSTEM
       ======================================== */

    /* Brand Colors */
    --color-accent: #06ffa5;
    --color-accent-secondary: #ff006e;
    --color-accent-tertiary: #8338ec;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Category Colors */
    --cat-visual-art: #ff6b9d;
    --cat-3d-immersive: #4ecdc4;
    --cat-audio-music: #ffb347;
    --cat-games-puzzles: #9b59b6;
    --cat-experimental-ai: #00d4ff;
    --cat-creative-tools: #ff9ff3;
    --cat-generative-art: #5fa8ff;
    --cat-particle-physics: #5dade2;
    --cat-educational: #f7dc6f;

    /* ========================================
       SPACING SCALE (8px base)
       ======================================== */
    --space-0: 0;
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.5rem;    /* 24px */
    --space-6: 2rem;      /* 32px */
    --space-7: 3rem;      /* 48px */
    --space-8: 4rem;      /* 64px */
    --space-9: 6rem;      /* 96px */
    --space-10: 8rem;     /* 128px */

    /* ========================================
       TYPOGRAPHY
       ======================================== */

    /* Font Families */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.875rem;   /* 14px */
    --text-base: 1rem;     /* 16px */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 1.875rem;  /* 30px */
    --text-4xl: 2.25rem;   /* 36px */
    --text-5xl: 3rem;      /* 48px */

    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    /* Letter Spacing */
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.1em;

    /* ========================================
       BORDERS & RADIUS
       ======================================== */
    --radius-none: 0;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    --border-width: 1px;
    --border-width-2: 2px;
    --border-width-4: 4px;

    /* ========================================
       SHADOWS
       ======================================== */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);

    /* Glow shadows */
    --shadow-glow-accent: 0 0 20px rgba(6, 255, 165, 0.3);
    --shadow-glow-accent-strong: 0 0 40px rgba(6, 255, 165, 0.5);

    /* ========================================
       Z-INDEX SCALE
       ======================================== */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-overlay: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-toast: 700;
    --z-tooltip: 800;

    /* ========================================
       TRANSITIONS
       ======================================== */
    --ease-linear: linear;
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-elastic: cubic-bezier(0.68, -0.6, 0.32, 1.6);

    --duration-75: 75ms;
    --duration-100: 100ms;
    --duration-150: 150ms;
    --duration-200: 200ms;
    --duration-300: 300ms;
    --duration-500: 500ms;
    --duration-700: 700ms;
    --duration-1000: 1000ms;

    /* ========================================
       LAYOUT
       ======================================== */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;

    --header-height: 64px;
    --bottom-nav-height: 64px;
    --sidebar-width: 280px;

    /* Grid */
    --grid-cols: 4;
    --grid-gap: var(--space-5);
    --card-min-width: 300px;

    /* ========================================
       BREAKPOINTS (for reference)
       ======================================== */
    /*
     * sm: 640px
     * md: 768px
     * lg: 1024px
     * xl: 1280px
     * 2xl: 1536px
     */

    /* ========================================
       COMPONENT-SPECIFIC
       ======================================== */

    /* Cards */
    --card-padding: var(--space-5);
    --card-radius: var(--radius-xl);
    --card-shadow: var(--shadow-md);

    /* Buttons */
    --btn-padding-x: var(--space-4);
    --btn-padding-y: var(--space-3);
    --btn-radius: var(--radius-lg);

    /* Inputs */
    --input-padding-x: var(--space-4);
    --input-padding-y: var(--space-3);
    --input-radius: var(--radius-lg);

    /* Modals */
    --modal-radius: var(--radius-2xl);
    --modal-max-width: 600px;
}

/* ========================================
   THEME: DARK (Default)
   ======================================== */
.theme-dark,
:root {
    /* Backgrounds */
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --bg-elevated: #242424;
    --bg-overlay: rgba(0, 0, 0, 0.8);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    --text-muted: rgba(255, 255, 255, 0.35);
    --text-inverse: #0a0a0a;

    /* Borders */
    --border-primary: rgba(255, 255, 255, 0.1);
    --border-secondary: rgba(255, 255, 255, 0.05);
    --border-focus: var(--color-accent);

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(12px);

    /* Scrollbar */
    --scrollbar-track: var(--bg-secondary);
    --scrollbar-thumb: rgba(255, 255, 255, 0.2);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.3);
}

/* ========================================
   REDUCED MOTION
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    :root {
        --duration-75: 0ms;
        --duration-100: 0ms;
        --duration-150: 0ms;
        --duration-200: 0ms;
        --duration-300: 0ms;
        --duration-500: 0ms;
        --duration-700: 0ms;
        --duration-1000: 0ms;
    }
}