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

:root {
    --color-bg: #ffffff;
    --color-text: #000000;
    --color-border: #000000;
    --color-hover: #666666;
    --font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* FIX: Scrollbar toujours visible pour stabilité */
html {
    overflow-y: scroll;
}

body {
    font-family: var(--font-family);
    font-weight: 300;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.5;
    overflow-x: hidden;
}

body.modal-open {
    overflow: hidden;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    /* FIX: Stabilité */
    transition: none !important;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.nav.hidden {
    opacity: 0;
    pointer-events: none;
}

.nav-logo {
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

/* FIX: Pas de transition sur nav */
.nav-logo,
.nav-menu {
    transition: none !important;
    transform: none !important;
}

.nav-menu.hidden {
    display: none;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: opacity 0.2s;
    opacity: 0.5;
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
}

/* Pages */
.page {
    display: none;
    padding-top: 51px;
    min-height: 100vh;
}

.page.active {
    display: block;
}

/* Filtres */
.filters {
    display: flex;
    gap: 20px;
    padding: 15px 30px;
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: none;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 300;
    color: var(--color-text);
    cursor: pointer;
    padding: 5px 0;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
    opacity: 1;
}

/* Grille de projets */
.projets-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    padding: 30px 30px; /* Top = 30px comme le gap */
}

.projet-card {
    aspect-ratio: 4/3;
    overflow: hidden;
    cursor: pointer;
    background: var(--color-bg);
    position: relative;
}

.projet-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s ease;
}

.projet-card:hover img {
    opacity: 0.3;
}

.projet-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    color: var(--color-text);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.projet-card:hover .projet-overlay {
    opacity: 1;
}

.projet-card-title {
    font-size: 14px;
    font-weight: 400;
    margin-bottom: 5px;
}

.projet-card-lieu {
    font-size: 13px;
    font-weight: 300;
}

/* Page Bureau */
.bureau-content {
    padding: 40px 30px;
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 40px;
}

.bureau-intro {
    grid-column: 1 / 2;
}

.bureau-intro p {
    font-size: 15px;
    line-height: 1.6;
}

.bureau-equipe {
    grid-column: 2 / 3;
}

.bureau-contact {
    grid-column: 2 / 3;
    margin-top: 15px;
}

.bureau-equipe h3,
.bureau-contact h3 {
    font-size: 16px;
    font-weight: 400;
    margin-bottom: 15px;
}

.team-list {
    list-style: none;
}

.team-list li {
    font-size: 15px;
    margin-bottom: 8px;
    font-weight: 300;
}

.team-list li strong {
    font-weight: 400;
}

.contact-address {
    font-size: 15px;
    margin-bottom: 15px;
}

.contact-links {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.contact-links a {
    color: var(--color-text);
    text-decoration: none;
    transition: opacity 0.2s;
}

.contact-links a:hover {
    opacity: 0.5;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 51px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 50;
    overflow-y: auto;
}

.modal.active {
    display: block;
}

.modal-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    grid-template-rows: auto 1fr;
    gap: 0 40px;
    padding: 40px 30px 60px 30px;
    text-align: left !important;
}

/* Header du projet */
.projet-header {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    padding: 0 !important;
    text-align: left !important;
}

.projet-header-left {
    flex: 1;
    padding: 0 !important;
    margin: 0 !important;
    text-align: left !important;
}

.projet-header-right {
    display: flex;
    align-items: flex-start;
}

.modal-close {
    background: none;
    border: none;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    color: var(--color-text);
    transition: opacity 0.2s;
    padding: 10px;
}

.modal-close:hover {
    opacity: 0.6;
}

/* Infos projet à gauche */
.projet-info {
    padding: 0 !important;
    margin-left: 0 !important;
    max-width: none;
    grid-column: 1 / 2;
    grid-row: 2 / 3;
    text-align: left;
}

.projet-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 5px;
    margin-left: 0 !important;
    padding-left: 0 !important;
    text-align: left;
}

.projet-meta {
    font-size: 14px;
    color: var(--color-hover);
    margin-bottom: 0;
    margin-left: 0 !important;
    padding-left: 0 !important;
    text-align: left;
}

.projet-description {
    font-size: 15px;
    line-height: 1.7;
    font-weight: 300;
    margin: 0;
    padding-left: 0 !important;
    margin-left: 0 !important;
    text-align: left;
}

.projet-description p {
    margin-left: 0 !important;
    padding-left: 0 !important;
    text-align: left !important;
}

/* Slider à droite */
.slider {
    position: relative;
    margin-bottom: 0;
    grid-column: 2 / 3;
    grid-row: 2 / 3;
}

.slider-track {
    display: flex;
    overflow-x: auto;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin-bottom: 20px;
    touch-action: pan-x;
    /* Empêcher le zoom sur iPhone */
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.slider-track::-webkit-scrollbar {
    display: none;
}

.slider-track img {
    flex-shrink: 0;
    width: 100%;
    height: auto;
    scroll-snap-align: center;
    scroll-snap-stop: always;
    object-fit: contain;
    max-height: 70vh;
    pointer-events: none;
    /* Empêcher le zoom et la sélection */
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

.slider-controls {
    position: relative;
    height: 40px; /* Hauteur fixe */
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 24px;
    color: var(--color-text);
    transition: opacity 0.2s;
    padding: 10px;
    /* Position absolue pour qu'elles restent fixes */
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    /* Améliorer le touch sur mobile */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.slider-prev {
    left: 0; /* Flèche gauche toujours à gauche */
}

.slider-next {
    right: 0; /* Flèche droite toujours à droite */
}

.slider-btn:hover {
    opacity: 0.5;
}

.slider-indicators {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--color-text);
}

.slider-counter {
    font-size: 14px;
    font-weight: 300;
}

/* Footer */
.footer {
    padding: 15px 30px;
    text-align: left;
    border-top: 1px solid var(--color-border);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    margin-top: 0;
}

.footer p {
    margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .projets-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 12px 20px;
        min-height: 44px; /* Hauteur confortable */
    }
    
    .nav-logo {
        font-size: 14px; /* Plus grand */
        line-height: 1.2;
        font-weight: 500;
    }
    
    .nav-menu {
        gap: 20px;
    }
    
    .nav-link {
        font-size: 12px; /* Plus petit que le logo */
        line-height: 1.2;
    }
    
    .filters {
        padding: 8px 20px; /* Moins haut */
        gap: 15px;
        min-height: 36px; /* Plus bas que nav */
        align-items: center; /* Centré verticalement */
        display: flex;
    }
    
    .filter-btn {
        font-size: 11px; /* Légèrement plus petit */
        padding: 4px 10px;
        line-height: 1.4;
    }
    
    .projets-grid {
        grid-template-columns: 1fr;
        padding: 15px 20px;
    }
    
    .bureau-content {
        padding: 40px 20px;
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .bureau-intro,
    .bureau-equipe,
    .bureau-contact {
        grid-column: 1;
    }
    
    .bureau-intro p,
    .team-list li,
    .contact-address {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .bureau-equipe h3,
    .bureau-contact h3 {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .modal-content {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto 1fr;
        padding: 20px 20px 40px;
        gap: 20px 0;
    }
    
    .projet-header {
        grid-column: 1;
        grid-row: 1;
    }
    
    .slider {
        grid-column: 1;
        grid-row: 2;
    }
    
    .projet-info {
        grid-column: 1;
        grid-row: 3;
    }
    
    .projet-title {
        font-size: 14px;
        line-height: 1.4;
    }
    
    .projet-meta {
        font-size: 12px;
        line-height: 1.4;
    }
    
    .projet-description {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .slider-track img {
        max-height: 50vh;
    }
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.projet-card,
.page {
    animation: fadeIn 0.3s ease;
}