/* Critical CSS pour améliorer les performances et Core Web Vitals */

/* Reset et base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background-color: #111827;
    font-display: swap;
}

/* Optimisation des images pour Core Web Vitals */
img {
    max-width: 100%;
    height: auto;
    loading: lazy;
    decoding: async;
}

/* Header critique */
.header-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    will-change: transform;
}

/* Hero section critique */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('../studio.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    will-change: transform;
}

/* Animations optimisées */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Boutons optimisés */
.btn-primary {
    display: inline-block;
    background-color: #ef4444;
    color: #000000;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.3s ease, transform 0.2s ease;
    will-change: background-color, transform;
}

.btn-primary:hover {
    background-color: #f87171;
    transform: scale(1.05);
}

.btn-secondary {
    display: inline-block;
    border: 2px solid #ef4444;
    color: #ef4444;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    will-change: background-color, color, transform;
}

.btn-secondary:hover {
    background-color: #ef4444;
    color: #000000;
    transform: scale(1.05);
}

/* Grid responsive optimisé */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-cols-1 {
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-cols-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Cards optimisées */
.card {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: transform 0.3s ease;
    will-change: transform;
}

.card:hover {
    transform: scale(1.05);
}

/* Typography optimisée */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: #ef4444;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    color: #ef4444;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: #ef4444;
}

/* Conteneur responsive */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
}

/* Navigation mobile optimisée */
.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem;
}

.mobile-menu.active {
    display: block;
}

/* Optimisation des performances */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy-load.loaded {
    opacity: 1;
}

/* Préchargement des ressources critiques */
.preload-bg {
    background-image: url('../studio.jpg');
    background-size: 1px 1px;
    background-repeat: no-repeat;
    position: absolute;
    top: -9999px;
    left: -9999px;
    width: 1px;
    height: 1px;
}

/* Optimisation du scroll */
.smooth-scroll {
    scroll-behavior: smooth;
}

/* Accessibilité */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus visible pour l'accessibilité */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #ef4444;
    outline-offset: 2px;
}

/* Optimisation des transitions */
.transition-optimized {
    transition-property: transform, opacity, background-color;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 300ms;
}

/* Réduction des animations pour les utilisateurs qui préfèrent */
@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;
    }
}