/* =============================================
   BASE - Reset, Variables, Typography
   ============================================= */

/* CSS Custom Properties */
:root {
    /* Brand Colors */
    --color-violet: #4d4fb0;
    --color-violet-dark: #3d3f8a;
    --color-rose: #ef8a9e;
    --color-jaune: #ffbe2c;
    --color-rouge: #d83f2a;
    --color-rouge-dark: #b8321f;
    --color-vert: #66bd52;

    /* Neutrals */
    --color-dark: #1a1a2e;
    --color-gray-900: #2d2d44;
    --color-gray-700: #5c5c7a;
    --color-gray-500: #8888a0;
    --color-gray-300: #c8c8d8;
    --color-gray-100: #f5f5f7;
    --color-light: #ffffff;

    /* Typography */
    --font-primary: 'DM Sans', system-ui, sans-serif;
    --font-display: 'Anybody', 'Arial Black', sans-serif;
    --font-script: 'Pacifico', cursive;

    /* 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;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Mobile touch optimizations */
* {
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-light);
    -webkit-font-smoothing: antialiased;
    /* Safe area for notched devices */
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

::selection {
    background-color: var(--color-jaune);
    color: var(--color-dark);
}

:focus-visible {
    outline: 3px solid var(--color-violet);
    outline-offset: 2px;
}

a {
    color: var(--color-violet);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-violet-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-violet);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.script-text {
    font-family: var(--font-script);
    text-transform: none;
    font-weight: 400;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-violet);
    color: var(--color-light);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    z-index: 10000;
    font-weight: 600;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 10px;
    color: var(--color-light);
}

/* =============================================
   ACCESSIBILITY - System preferences respected
   ============================================= */

/* High contrast mode - respects user's system preference */
@media (prefers-contrast: more) {
    :root {
        --color-violet: #2d2f7a;
        --color-rouge: #b52d1a;
        --color-vert: #2d7a22;
    }

    a {
        text-decoration: underline;
    }

    .btn,
    .tab-btn,
    .social-link {
        border: 2px solid currentColor;
    }

    a:focus,
    button:focus,
    input:focus,
    textarea:focus,
    select:focus {
        outline: 3px solid var(--color-dark);
        outline-offset: 2px;
    }
}

/* Reduced motion - respects user's system preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    [data-aos] {
        opacity: 1 !important;
        transform: none !important;
    }

    .scroll-dot {
        animation: none;
    }
}