:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --accent-color: #777777;
    --gap: 15px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Header & Nav */
.site-header {
    padding: 40px 20px;
    text-align: center;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    z-index: 100;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.nav-categories {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.filter-btn, .nav-link {
    background: none;
    border: none;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
    padding: 5px 10px;
}

.filter-btn.active, .filter-btn:hover, .nav-link:hover {
    color: var(--text-color);
}

/* Galerie */
.gallery-container {
    padding: 0 var(--gap);
    max-width: 1600px;
    margin: 0 auto;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--gap);
}

.grid-item {
    aspect-ratio: 3 / 2;
    overflow: hidden;
    position: relative;
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease;
}

.grid-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 30%; /* Remonte légèrement l'horizon par défaut */
    transition: transform 0.6s ease, filter 0.6s ease;
}

/* Centrage automatique intelligent pour le dossier "Portraits" */
.grid-item[data-category="Portraits"] img {
    object-position: center 15%; /* Focus haut de l'image pour cadrer le visage */
}

/* Animations au survol */
.grid-item:hover img {
    transform: scale(1.05);
}

/* Sections Textes */
.section-about, .section-contact {
    padding: 100px 20px;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.container h2 {
    font-size: 28px;
    margin-bottom: 30px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Formulaire */
.contact-form {
    text-align: left;
    margin-top: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 12px;
    text-transform: uppercase;
    margin-bottom: 5px;
    letter-spacing: 1px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    background: #fafafa;
    font-family: inherit;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--text-color);
}

.submit-btn {
    background: var(--text-color);
    color: var(--bg-color);
    border: none;
    padding: 15px 40px;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.submit-btn:hover {
    opacity: 0.9;
}

.success { color: green; margin-bottom: 20px; }
.error { color: red; margin-bottom: 20px; }

/* Arrière-plan Animé (Aplats Parallax) */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.aplat {
    position: absolute;
    border-radius: 50%;
    background-color: #f7f7f7; /* Couleur unie et douce pour l'aplat */
    transition: transform 0.1s ease-out;
}

.aplat-1 {
    width: 400px;
    height: 400px;
    top: -100px;
    left: -150px;
}

.aplat-2 {
    width: 600px;
    height: 600px;
    top: 30%;
    right: -200px;
}

.aplat-3 {
    width: 300px;
    height: 300px;
    bottom: -100px;
    left: 15%;
}

/* Responsive */
@media (max-width: 600px) {
    .site-header { padding: 20px 10px; }
    .nav-categories { gap: 10px; }
    .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}
/* Section Témoignages */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.testimonial-card {
    background: #ffffff;
    padding: 30px;
    border-left: 3px solid var(--accent-color);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.testimonial-text {
    font-style: italic;
    font-size: 0.95em;
    line-height: 1.7;
    color: #444;
    margin-bottom: 20px;
}

.testimonial-author {
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.85em;
    color: var(--text-color);
    text-align: right;
}