/**
 * Prashant Rana Portfolio — Design Tokens
 * Cinematic Experience Design System
 * 
 * Palette: Deep Navy → Graphite → Charcoal → Soft Glass
 * Accents: Pine Green, Deep Blue, Warm Amber
 * Typography: Sora (headlines) + Inter (body)
 */

/* ============ Core Design Tokens ============ */
:root {
    /* ── Primary: Pine Green ── */
    --c-primary: #2dd4bf;
    --c-primary-dim: #14b8a6;
    --c-primary-glow: rgba(45, 212, 191, 0.4);
    --c-primary-subtle: rgba(45, 212, 191, 0.08);

    /* ── Secondary: Warm Amber (Hospitality Accent) ── */
    --c-secondary: #f59e0b;
    --c-secondary-dim: #d97706;
    --c-secondary-glow: rgba(245, 158, 11, 0.35);
    --c-secondary-subtle: rgba(245, 158, 11, 0.08);

    /* ── Tertiary: Deep Blue / Indigo ── */
    --c-tertiary: #818cf8;
    --c-tertiary-dim: #6366f1;
    --c-tertiary-glow: rgba(129, 140, 248, 0.35);
    --c-tertiary-subtle: rgba(129, 140, 248, 0.08);

    /* ── Surface System (Dark Theme) ── */
    --c-void: #000000;
    --c-surface-deep: #030712;
    --c-surface: #0a0f1e;
    --c-surface-raised: #111827;
    --c-surface-overlay: #1f2937;
    --c-surface-bright: #374151;

    /* ── On-Surface Text ── */
    --c-text-primary: #f1f5f9;
    --c-text-secondary: #94a3b8;
    --c-text-muted: #64748b;
    --c-text-dim: #475569;

    /* ── Glass Surfaces ── */
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-bg-hover: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(148, 163, 184, 0.08);
    --glass-border-hover: rgba(148, 163, 184, 0.15);
    --glass-blur: 20px;
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* ── Borders ── */
    --border-subtle: rgba(148, 163, 184, 0.06);
    --border-light: rgba(148, 163, 184, 0.1);
    --border-medium: rgba(148, 163, 184, 0.18);

    /* ── Shadows ── */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.6);
    --shadow-glow-primary: 0 0 30px var(--c-primary-glow);
    --shadow-glow-secondary: 0 0 30px var(--c-secondary-glow);
    --shadow-glow-tertiary: 0 0 30px var(--c-tertiary-glow);

    /* ── Typography ── */
    --font-display: 'Sora', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --fs-hero: clamp(3rem, 8vw, 6rem);
    --fs-h1: clamp(2rem, 5vw, 3.5rem);
    --fs-h2: clamp(1.75rem, 4vw, 2.75rem);
    --fs-h3: clamp(1.25rem, 2.5vw, 1.75rem);
    --fs-h4: clamp(1.1rem, 2vw, 1.35rem);
    --fs-body: clamp(0.95rem, 1.5vw, 1.1rem);
    --fs-small: clamp(0.8rem, 1.2vw, 0.9rem);
    --fs-caption: clamp(0.7rem, 1vw, 0.8rem);

    --lh-tight: 1.15;
    --lh-snug: 1.3;
    --lh-normal: 1.6;
    --lh-relaxed: 1.8;

    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;

    --ls-tight: -0.03em;
    --ls-normal: 0;
    --ls-wide: 0.05em;
    --ls-wider: 0.12em;

    /* ── Spacing ── */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-section: clamp(6rem, 12vh, 10rem);

    --container-max: 1200px;
    --container-narrow: 800px;
    --container-padding: clamp(1.25rem, 4vw, 2.5rem);

    /* ── Border Radius ── */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* ── Transitions ── */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    --duration-fast: 150ms;
    --duration-base: 300ms;
    --duration-slow: 500ms;
    --duration-slower: 800ms;

    /* ── Z-Index Scale ── */
    --z-base: 1;
    --z-dropdown: 10;
    --z-sticky: 100;
    --z-overlay: 500;
    --z-modal: 1000;
    --z-cursor: 9999;
    --z-loading: 10000;

    /* ── GPU Quality Tiers ── */
    --particle-count: 80;
    --shader-quality: 1.0;
    --animation-complexity: 1.0;
}

/* ── GPU Quality: Medium ── */
[data-gpu="medium"] {
    --particle-count: 45;
    --shader-quality: 0.7;
    --animation-complexity: 0.7;
    --glass-blur: 12px;
}

/* ── GPU Quality: Low ── */
[data-gpu="low"] {
    --particle-count: 20;
    --shader-quality: 0.4;
    --animation-complexity: 0.3;
    --glass-blur: 8px;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    :root {
        --duration-fast: 0ms;
        --duration-base: 0ms;
        --duration-slow: 0ms;
        --duration-slower: 0ms;
        --particle-count: 0;
        --animation-complexity: 0;
    }
}

/* ── Light Theme ── */
[data-theme="light"] {
    --c-primary: #0d9488;
    --c-primary-dim: #0f766e;
    --c-primary-glow: rgba(13, 148, 136, 0.25);
    --c-primary-subtle: rgba(13, 148, 136, 0.06);

    --c-secondary: #d97706;
    --c-secondary-dim: #b45309;
    --c-secondary-glow: rgba(217, 119, 6, 0.2);

    --c-tertiary: #6366f1;
    --c-tertiary-dim: #4f46e5;

    --c-void: #f8fafc;
    --c-surface-deep: #f1f5f9;
    --c-surface: #ffffff;
    --c-surface-raised: #f8fafc;
    --c-surface-overlay: #e2e8f0;
    --c-surface-bright: #cbd5e1;

    --c-text-primary: #0f172a;
    --c-text-secondary: #475569;
    --c-text-muted: #64748b;
    --c-text-dim: #94a3b8;

    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-bg-hover: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(15, 23, 42, 0.08);
    --glass-border-hover: rgba(15, 23, 42, 0.15);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);

    --border-subtle: rgba(15, 23, 42, 0.04);
    --border-light: rgba(15, 23, 42, 0.08);
    --border-medium: rgba(15, 23, 42, 0.12);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.12);
}