/**
 * DORA Design System - Design Tokens
 * Version: 3.0 — Unified on v2 "Institutional Precision"
 * Typography: Sora (headings) + Plus Jakarta Sans (body)
 * Palette: Tailwind Blue + Amber + Slate
 *
 * Ce fichier centralise toutes les variables CSS du design system.
 * Importer ce fichier en premier dans tous les autres fichiers CSS.
 */

:root {
    /* ========================================
       COULEURS PRIMAIRES - Bleu Tailwind
       ======================================== */
    --color-primary-900: #1e3a8a;
    --color-primary-800: #1e40af;
    --color-primary-700: #1d4ed8;
    --color-primary-600: #2563eb;
    --color-primary-500: #3b82f6;
    --color-primary-400: #60a5fa;
    --color-primary-300: #93c5fd;
    --color-primary-200: #bfdbfe;
    --color-primary-100: #dbeafe;
    --color-primary-50: #eff6ff;

    /* ========================================
       COULEURS ACCENT - Violet Tech/Innovation
       ======================================== */
    --color-accent-900: #4c1d95;
    --color-accent-800: #5b21b6;
    --color-accent-700: #6d28d9;
    --color-accent-600: #7c3aed;
    --color-accent-500: #8b5cf6;
    --color-accent-400: #a78bfa;
    --color-accent-300: #c4b5fd;
    --color-accent-200: #ddd6fe;
    --color-accent-100: #ede9fe;

    /* ========================================
       COULEURS CTA - Amber Conversion
       ======================================== */
    --color-cta-700: #b45309;
    --color-cta-600: #d97706;
    --color-cta-500: #f59e0b;
    --color-cta-400: #fbbf24;
    --color-cta-300: #fcd34d;
    --color-cta-200: #fde68a;
    --color-cta-100: #fef3c7;

    /* ========================================
       COULEURS SEMANTIQUES
       ======================================== */
    --color-success-700: #047857;
    --color-success-600: #059669;
    --color-success-500: #10b981;
    --color-success-400: #34d399;
    --color-success-100: #d1fae5;

    --color-warning-700: #b45309;
    --color-warning-600: #d97706;
    --color-warning-500: #f59e0b;
    --color-warning-400: #fbbf24;
    --color-warning-100: #fef3c7;

    --color-error-700: #b91c1c;
    --color-error-600: #dc2626;
    --color-error-500: #ef4444;
    --color-error-400: #f87171;
    --color-error-100: #fee2e2;

    --color-info-600: #2563eb;
    --color-info-500: #3b82f6;
    --color-info-400: #60a5fa;

    /* ========================================
       COULEURS NEUTRES — Slate (WCAG AA)
       ======================================== */
    --color-neutral-950: #020617;
    --color-neutral-900: #0f172a;
    --color-neutral-800: #1e293b;
    --color-neutral-700: #334155;
    --color-neutral-600: #475569;
    --color-neutral-500: #64748b;
    --color-neutral-400: #94a3b8;
    --color-neutral-300: #cbd5e1;
    --color-neutral-200: #e2e8f0;
    --color-neutral-100: #f1f5f9;
    --color-neutral-50: #f8fafc;
    --color-white: #ffffff;

    /* ========================================
       TEXTE SUR FOND SOMBRE (WCAG AA)
       Ratios de contraste minimum 4.5:1
       ======================================== */
    --text-on-dark-primary: #f1f5f9;
    --text-on-dark-secondary: #e2e8f0;
    --text-on-dark-muted: #cbd5e1;
    --text-on-dark-subtle: #94a3b8;

    /* ========================================
       GRADIENTS
       ======================================== */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-hero: linear-gradient(135deg, #0a0f1a 0%, #1e1b4b 50%, #0f172a 100%);
    --gradient-cta: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --gradient-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);

    /* Gradients de fond (body/sections) */
    --gradient-body: linear-gradient(135deg, #0a0f1a 0%, #1e1b4b 50%, #0a0f1a 100%);
    --gradient-section-dark: linear-gradient(180deg, rgba(10, 15, 26, 0.95) 0%, rgba(30, 27, 75, 0.9) 100%);

    /* ========================================
       TYPOGRAPHIE
       ======================================== */
    --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Sora', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

    /* Tailles de police */
    --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 */
    --text-6xl: 3.75rem;     /* 60px */

    /* Line heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 1.75;

    /* Font weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

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

    /* ========================================
       ESPACEMENT
       ======================================== */
    --space-0: 0;
    --space-1: 0.25rem;      /* 4px */
    --space-2: 0.5rem;       /* 8px */
    --space-3: 0.75rem;      /* 12px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-8: 2rem;         /* 32px */
    --space-10: 2.5rem;      /* 40px */
    --space-12: 3rem;        /* 48px */
    --space-14: 3.5rem;      /* 56px */
    --space-16: 4rem;        /* 64px */
    --space-20: 5rem;        /* 80px */
    --space-24: 6rem;        /* 96px */
    --space-32: 8rem;        /* 128px */

    /* ========================================
       BORDURES
       ======================================== */
    --radius-none: 0;
    --radius-sm: 0.25rem;    /* 4px */
    --radius-md: 0.375rem;   /* 6px */
    --radius-lg: 0.5rem;     /* 8px */
    --radius-xl: 0.75rem;    /* 12px */
    --radius-2xl: 1rem;      /* 16px */
    --radius-3xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;

    /* Border widths */
    --border-0: 0;
    --border-1: 1px;
    --border-2: 2px;
    --border-4: 4px;

    /* ========================================
       OMBRES
       ======================================== */
    --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 -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);

    /* Shadows colorées */
    --shadow-primary: 0 10px 40px rgba(37, 99, 235, 0.3);
    --shadow-cta: 0 8px 30px rgba(245, 158, 11, 0.4);
    --shadow-cta-hover: 0 12px 40px rgba(245, 158, 11, 0.5);
    --shadow-accent: 0 10px 40px rgba(124, 58, 237, 0.3);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.3);

    /* ========================================
       GLASSMORPHISM
       ======================================== */
    --glass-bg-light: rgba(255, 255, 255, 0.08);
    --glass-bg-medium: rgba(255, 255, 255, 0.12);
    --glass-bg-strong: rgba(255, 255, 255, 0.18);
    --glass-bg-solid: rgba(255, 255, 255, 0.85);

    --glass-border-subtle: rgba(255, 255, 255, 0.1);
    --glass-border-visible: rgba(255, 255, 255, 0.15);
    --glass-border-strong: rgba(255, 255, 255, 0.25);

    --glass-blur-sm: blur(8px);
    --glass-blur-md: blur(16px);
    --glass-blur-lg: blur(20px);
    --glass-blur-xl: blur(40px);

    /* ========================================
       TRANSITIONS & ANIMATIONS
       ======================================== */
    --duration-instant: 75ms;
    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-moderate: 300ms;
    --duration-slow: 500ms;
    --duration-slower: 700ms;

    --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(0.175, 0.885, 0.32, 1.275);
    --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ========================================
       Z-INDEX
       ======================================== */
    --z-behind: -1;
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-overlay: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;

    /* ========================================
       BREAKPOINTS (pour référence JS)
       ======================================== */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;

    /* ========================================
       CONTAINERS
       ======================================== */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
    --container-2xl: 1400px;
}

/* ========================================
   MEDIA QUERIES - DARK MODE SUPPORT
   ======================================== */
@media (prefers-color-scheme: dark) {
    :root {
        --glass-bg-light: rgba(30, 41, 59, 0.6);
        --glass-bg-medium: rgba(30, 41, 59, 0.8);
        --glass-bg-solid: rgba(30, 41, 59, 0.95);
        --glass-border-subtle: rgba(255, 255, 255, 0.08);
        --glass-border-visible: rgba(255, 255, 255, 0.12);
    }
}

/* ========================================
   MEDIA QUERIES - REDUCED MOTION
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    :root {
        --duration-instant: 0ms;
        --duration-fast: 0ms;
        --duration-normal: 0ms;
        --duration-moderate: 0ms;
        --duration-slow: 0ms;
        --duration-slower: 0ms;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ========================================
   UTILITIES - Classes utilitaires de base
   ======================================== */

/* Focus visible pour accessibilité */
:focus-visible {
    outline: 3px solid var(--color-primary-400);
    outline-offset: 2px;
}

/* Focus sur fond sombre */
.dark-bg :focus-visible,
[data-theme="dark"] :focus-visible {
    outline-color: var(--color-warning-400);
}

/* Skip link pour accessibilité */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary-600);
    color: var(--color-white);
    padding: var(--space-3) var(--space-6);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    z-index: var(--z-toast);
    transition: top var(--duration-moderate) var(--ease-out);
    text-decoration: none;
    font-weight: var(--font-semibold);
}

.skip-link:focus {
    top: 0;
}