/* --- Reset & Variables --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --text-muted: #767676;
    --light-gray: #f5f5f7;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition-speed: 0.3s;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
    font-family: var(--font-main);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
}

body.lightbox-open {
    overflow: hidden;
    touch-action: none;
}

/* --- Header & Navigation Ultra-Propre --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.2rem 4%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none !important;
    color: var(--text-color) !important;
}

.logo-svg {
    width: 26px;
    height: 26px;
    color: var(--text-color);
    transition: transform var(--transition-speed) ease;
}

.logo-link:hover .logo-svg {
    transform: scale(1.05);
}

.logo-text {
    font-size: 0.9rem !important;
    font-weight: 600 !important;
    letter-spacing: 2.5px !important;
    text-transform: uppercase !important;
    color: var(--text-color) !important;
}

/* Ancres de navigation */
.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav a {
    text-decoration: none !important;
    color: var(--text-muted) !important;
    font-size: 0.85rem !important;
    font-weight: 400 !important;
    letter-spacing: 1px !important;
    text-transform: uppercase !important;
    transition: color var(--transition-speed) ease;
}

.nav a:hover {
    color: var(--text-color) !important;
}

/* --- Galerie Principale --- */
.gallery-container {
    padding: 8rem 4% 4rem 4%;
    column-count: 3;
    column-gap: 20px; /* Écart horizontal resserré */
}

.gallery-item {
    break-inside: avoid;
    -webkit-column-break-inside: avoid;
    display: block;
    width: 100%;
    margin-bottom: 22px; /* Marges réduites et harmonieuses entre chaque photo */
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    background-color: var(--light-gray);
    transition: opacity var(--transition-speed) ease;
}

.gallery-item:hover img {
    opacity: 0.85;
}

/* --- Légendes Artistes --- */
.artist-name {
    display: block;
    margin-top: 6px; /* Colle subtilement sous l'image */
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--text-muted);
    transition: color var(--transition-speed) ease;
}

.gallery-item:hover .artist-name {
    color: var(--text-color);
}

/* Responsive Mobile */
@media (max-width: 600px) {
    .gallery-container {
        column-count: 1;
        padding-top: 5.5rem;
    }
    
    .gallery-item {
        margin-bottom: 20px;
    }
}

/* --- Lightbox --- */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    justify-content: center;
    align-items: center;
}

.lightbox-content {
    max-width: 90%;
    max-height: 85vh;
    object-fit: contain;
    transition: opacity var(--transition-speed) ease-in-out;
}

.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 4%;
    font-size: 2.5rem;
    font-weight: 100;
    cursor: pointer;
    color: var(--text-color);
    z-index: 1010;
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 2rem 1rem;
    z-index: 1010;
    opacity: 0.5;
    transition: opacity var(--transition-speed);
}

.lightbox-prev:hover,
.lightbox-next:hover { opacity: 1; }
.lightbox-prev { left: 4%; }
.lightbox-next { right: 4%; }

/* --- Section Services / SEO --- */
.services-section {
    padding: 8rem 4%;
    border-top: 1px solid var(--light-gray);
}

.services-content h3 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 3rem;
    letter-spacing: -0.3px;
    text-transform: uppercase;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.services-grid h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.8rem;
}

.services-grid p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* --- Section Contact --- */
.contact-section {
    padding: 8rem 4% 10rem 4%;
    border-top: 1px solid var(--light-gray);
}

.contact-content { max-width: 600px; }

.contact-content h2 {
    font-weight: 400;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-content p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.2rem;
}

.email-link {
    font-size: 1.1rem;
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid var(--text-color);
    padding-bottom: 4px;
    transition: opacity 0.3s ease;
}

.email-link:hover { opacity: 0.6; }

.instagram-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-speed) ease;
}

.instagram-link:hover { color: var(--text-color); }

.instagram-icon {
    width: 15px;
    height: 15px;
    stroke-width: 1.5;
}

/* --- Responsive (Tablettes et Mobiles) --- */
@media (max-width: 900px) {
    .gallery-container { 
        column-count: 2; 
    }
}

@media (max-width: 600px) {
    .header {
        padding: 0.9rem 4%; /* Réduit la hauteur du header sur petit écran */
    }

    .logo-text {
        font-size: 0.75rem !important; /* Ajuste la taille de la marque */
        letter-spacing: 1.5px !important;
    }

    .logo-svg {
        width: 20px;
        height: 20px; /* Logo plus discret sur mobile */
    }

    .logo-link {
        gap: 0.4rem;
    }

    .nav {
        gap: 0.8rem; /* Rapproche les 3 ancres pour éviter qu'elles ne débordent */
    }

    .nav a {
        font-size: 0.7rem !important; /* Taille idéale pour lire Travaux, Expertise et Contact */
        letter-spacing: 0.5px !important;
    }

    .gallery-container { 
        column-count: 1; 
        padding-top: 5.5rem; 
    }

    .lightbox-prev, 
    .lightbox-next { 
        display: none; 
    }
}