/**
 * PhotosAP - Styles principaux
 * Design moderne, minimaliste et responsive
 */

/* ============================================
   CSS Reset & Variables
   ============================================ */

:root {
    /* Couleurs */
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: #e5e5e5;
    --color-border-light: #f0f0f0;
    --color-accent: #2c2c2c;
    --color-accent-hover: #000000;
    --color-error: #dc3545;
    --color-success: #28a745;
    --color-overlay: rgba(245, 245, 245, 0.98);

    /* Typographie */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Dimensions */
    --container-max-width: 1400px;
    --header-height: 60px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Ombres */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Layout
   ============================================ */

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.site-main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* ============================================
   Header
   ============================================ */

.site-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.site-logo {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color var(--transition-fast);
}

.site-logo:hover {
    color: var(--color-text-secondary);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.back-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.back-link svg {
    width: 18px;
    height: 18px;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.site-footer p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ============================================
   Page Albums (Accueil)
   ============================================ */

.page-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.page-title h1 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.page-title p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

/* Grille d'albums */
.albums-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .albums-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: var(--spacing-xl);
    }
}

@media (min-width: 1200px) {
    .albums-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Carte d'album */
.album-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.album-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.album-cover {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background-color: var(--color-border-light);
}

.album-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.album-card:hover .album-cover img {
    transform: scale(1.05);
}

.album-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-border-light) 0%, var(--color-border) 100%);
}

.album-cover-placeholder svg {
    width: 48px;
    height: 48px;
    color: var(--color-text-muted);
}

.album-photo-count {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.album-info {
    padding: var(--spacing-lg);
}

.album-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

/* Formulaire de mot de passe */
.album-password-form {
    display: flex;
    gap: var(--spacing-sm);
}

.album-password-form input[type="password"] {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.album-password-form input[type="password"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(44, 44, 44, 0.1);
}

.album-password-form button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    white-space: nowrap;
}

.album-password-form button:hover {
    background-color: var(--color-accent-hover);
}

.album-error {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
}

/* Lien sur la couverture d'album */
.album-cover a {
    display: block;
    width: 100%;
    height: 100%;
}

/* Bouton Voir l'album */
.btn-view-album {
    display: block;
    width: 100%;
    padding: 12px 20px;
    background-color: var(--color-accent);
    color: white;
    text-decoration: none;
    text-align: center;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.03em;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-view-album:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Badge vidéo */
.video-badge {
    display: flex;
    align-items: center;
    gap: 4px;
}

.video-badge svg {
    fill: currentColor;
    stroke: none;
}

/* ============================================
   Page Galerie
   ============================================ */

.gallery-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.gallery-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xs);
}

.gallery-meta {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Grille de photos - dense et serrée */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 4px;
}

@media (min-width: 480px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 6px;
    }
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 8px;
    }
}

@media (min-width: 1200px) {
    .gallery-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* Photo individuelle */
.gallery-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    cursor: pointer;
    background-color: var(--color-border-light);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base), filter var(--transition-base), opacity var(--transition-base);
}

/* Lazy loading - effet de fondu */
.gallery-item img.lazy {
    opacity: 0;
}

.gallery-item img.loaded {
    opacity: 1;
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0);
    transition: background var(--transition-fast);
    pointer-events: none;
}

.gallery-item:hover::after {
    background: rgba(0, 0, 0, 0.1);
}

/* ============================================
   Toolbar de sélection galerie
   ============================================ */

.gallery-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.select-all-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.select-all-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-accent);
}

.selection-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.btn-download,
.btn-deselect {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
}

.btn-download {
    background-color: var(--color-accent);
    color: white;
}

.btn-deselect {
    background-color: var(--color-border);
    color: var(--color-text);
}

.btn-download:hover:not(:disabled) {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
}

.btn-deselect:hover:not(:disabled) {
    background-color: var(--color-text-muted);
    color: white;
    transform: translateY(-1px);
}

.btn-download:disabled,
.btn-deselect:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-download svg,
.btn-deselect svg {
    flex-shrink: 0;
}

/* Checkbox sur les photos */
.gallery-item .photo-checkbox {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 24px;
    height: 24px;
    z-index: 10;
    cursor: pointer;
    accent-color: var(--color-accent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.gallery-item:hover .photo-checkbox,
.gallery-item.selected .photo-checkbox {
    opacity: 1;
}

.gallery-item .photo-checkbox-overlay {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 4px;
    z-index: 9;
    opacity: 0;
    transition: opacity var(--transition-fast);
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.gallery-item:hover .photo-checkbox-overlay,
.gallery-item.selected .photo-checkbox-overlay {
    opacity: 0.9;
}

.gallery-item.selected {
    outline: 3px solid var(--color-accent);
    outline-offset: -3px;
}

.gallery-item.selected::after {
    background: rgba(0, 0, 0, 0.15);
}

@media (max-width: 600px) {
    .gallery-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-left,
    .toolbar-right {
        justify-content: center;
    }

    .btn-download {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================
   Lightbox / Popup plein écran
   ============================================ */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background-color: var(--color-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 95vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.lightbox.active .lightbox-image {
    opacity: 1;
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background-color: var(--color-surface);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
    z-index: 1001;
}

.lightbox-close:hover {
    transform: scale(1.1);
    background-color: var(--color-text);
}

.lightbox-close:hover svg {
    color: white;
}

.lightbox-close svg {
    width: 24px;
    height: 24px;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background-color: var(--color-surface);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
    z-index: 1001;
}

.lightbox-nav:hover {
    transform: translateY(-50%) scale(1.1);
    background-color: var(--color-text);
}

.lightbox-nav:hover svg {
    color: white;
}

.lightbox-nav svg {
    width: 24px;
    height: 24px;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.lightbox-prev {
    left: var(--spacing-lg);
}

.lightbox-next {
    right: var(--spacing-lg);
}

.lightbox-counter {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-surface);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
}

/* ============================================
   Messages d'erreur et vide
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-md);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.empty-state h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--color-text-secondary);
}

.error-message {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--color-error);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.success-message {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: var(--color-success);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Chargement
   ============================================ */

.loading-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   Utilitaires
   ============================================ */

.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;
}

.text-center {
    text-align: center;
}

/* ============================================
   Responsive Mobile
   ============================================ */

@media (max-width: 479px) {
    :root {
        --header-height: 56px;
    }

    .page-title h1 {
        font-size: var(--font-size-xl);
    }

    .album-info {
        padding: var(--spacing-md);
    }

    .album-name {
        font-size: var(--font-size-base);
    }

    .album-password-form {
        flex-direction: column;
    }

    .album-password-form button {
        width: 100%;
    }

    .lightbox-nav {
        width: 40px;
        height: 40px;
    }

    .lightbox-close {
        width: 40px;
        height: 40px;
        top: var(--spacing-md);
        right: var(--spacing-md);
    }

    .lightbox-prev {
        left: var(--spacing-sm);
    }

    .lightbox-next {
        right: var(--spacing-sm);
    }
}