/* ============================================================================
   STYLES SPÉCIFIQUES - PAGE PORTFOLIO
   
   Version 2 - Filtres améliorés - Décembre 2024
   ============================================================================ */

/* ========================================
   PORTFOLIO HERO
======================================== */
.portfolio-hero {
    padding: 150px 5vw var(--spacing-lg);
    text-align: center;
    min-height: 60vh;
}

/* ========================================
   PROJECTS SECTION (filtres + grille)
======================================== */
.projects-section {
    min-height: auto;
    padding: var(--spacing-md) 5vw var(--spacing-xl);
}

.portfolio-hero__title {
    font-size: clamp(60px, 12vw, 150px);
    margin-bottom: var(--spacing-sm);
    line-height: 0.9;
}

.portfolio-hero__subtitle {
    font-size: 18px;
    color: var(--overlay-medium);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   FILTERS - Nouveau système
======================================== */
.filters {
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    position: relative;
}

/* Bouton filtre de base */
.filter-btn {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--color-text);
    background: transparent;
    border: 1px solid var(--overlay-light);
    padding: 10px 18px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    cursor: pointer;
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.05);
}

.filter-btn--active {
    border-color: var(--color-gold);
    background: var(--color-gold);
    color: var(--color-secondary);
}

.filter-btn--active:hover {
    background: var(--color-gold);
}

/* Compteur dans les filtres */
.filter-count {
    margin-left: 5px;
    opacity: 0.6;
    font-size: 9px;
}

.filter-btn--active .filter-count {
    opacity: 0.8;
}

/* Bouton toggle filtres */
.filter-toggle {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--color-gold);
    background: transparent;
    border: 1px solid var(--color-gold);
    padding: 10px 18px;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.filter-toggle:hover {
    background: rgba(212, 175, 55, 0.1);
}

.filter-toggle__icon {
    font-size: 14px;
    font-weight: 300;
    transition: transform 0.3s ease;
}

.filter-toggle[aria-expanded="true"] .filter-toggle__icon {
    transform: rotate(45deg);
}

/* Liste des filtres (masquée par défaut) */
.filters-list {
    display: none;
    width: 100%;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--overlay-light);
    animation: fadeIn 0.3s ease;
}

.filters-list.show {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   PROJECTS GRID
======================================== */
.projects {
    padding: 0;
    margin-top: var(--spacing-md);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    max-width: 1800px;
    margin: 0 auto;
}

.project-card {
    position: relative;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* Effet décalé pour colonnes 2 et 4 */
.project-card:nth-child(4n+2),
.project-card:nth-child(4n) {
    transform: translateY(40px);
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-card:nth-child(4n+2):hover,
.project-card:nth-child(4n):hover {
    transform: translateY(35px);
}

.project-card.hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    position: absolute;
}

.project-card__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.project-card__image-wrapper {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
    background: #000;
}

.project-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.5s ease;
}

.project-card:hover .project-card__image {
    transform: scale(1.1);
    opacity: 0.9;
}

.project-card__overlay {
    position: absolute;
    bottom: 40px;
    left: -20px;
    background: var(--color-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--overlay-light);
    z-index: 2;
    transition: transform 0.3s ease;
}

.project-card:hover .project-card__overlay {
    transform: translateX(10px);
}

.project-card__category {
    color: var(--color-gold);
    font-size: 10px;
    font-family: var(--font-mono);
    letter-spacing: 1.5px;
    margin-bottom: 5px;
    display: block;
    text-transform: uppercase;
}

.project-card__title {
    font-family: var(--font-display);
    font-size: 32px;
    margin: 0;
    line-height: 1;
    letter-spacing: 1px;
}

/* Empty state */
.projects-empty {
    text-align: center;
    padding: var(--spacing-xl) 0;
    display: none;
}

.projects-empty.show {
    display: block;
}

.projects-empty__icon {
    font-size: 60px;
    margin-bottom: var(--spacing-sm);
    opacity: 0.3;
}

.projects-empty__text {
    font-size: 18px;
    color: var(--overlay-medium);
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 1400px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .project-card:nth-child(4n+2),
    .project-card:nth-child(4n) {
        transform: translateY(0);
    }
    
    .project-card:nth-child(3n+2) {
        transform: translateY(80px);
    }
    
    .project-card:nth-child(3n+2):hover {
        transform: translateY(70px);
    }
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .project-card:nth-child(3n+2) {
        transform: translateY(0);
    }
    
    .project-card:nth-child(2n) {
        transform: translateY(80px);
    }
    
    .project-card:nth-child(2n):hover {
        transform: translateY(70px);
    }
    
    .site-nav {
        display: none;
    }
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card:nth-child(2n) {
        transform: translateY(0);
    }
    
    .filters {
        gap: 10px;
    }
    
    .filter-btn {
        font-size: 9px;
        padding: 8px 14px;
    }
    
    .filter-toggle {
        font-size: 9px;
        padding: 8px 14px;
    }
    
    .portfolio-hero__title {
        font-size: 60px;
    }
    
    .project-card__title {
        font-size: 26px;
    }
    
    .project-card__category {
        font-size: 9px;
    }
}