/* Bildverwaltungssystem - Modernes dunkles Design */

:root {
    --primary-dark: #1a1a1a;
    --secondary-dark: #2d2d2d;
    --accent-dark: #3a3a3a;
    --silver: #c0c0c0;
    --silver-light: #e8e8e8;
    --text-light: #f5f5f5;
    --text-muted: #a0a0a0;
    --success: #4caf50;
    --danger: #f44336;
    --warning: #ff9800;
}

* {
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    color: var(--text-light);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* Login-Bereich */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: var(--secondary-dark);
    border: 1px solid var(--accent-dark);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.login-box h2 {
    color: var(--silver-light);
    margin-bottom: 30px;
    text-align: center;
    font-weight: 300;
    letter-spacing: 1px;
}

/* Navigation */
.navbar {
    background: var(--secondary-dark) !important;
    border-bottom: 1px solid var(--accent-dark);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.navbar-brand, .nav-link {
    color: var(--silver-light) !important;
}

.nav-link:hover {
    color: var(--silver) !important;
}

/* Container */
.main-container {
    padding: 30px 15px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--secondary-dark);
    border: 1px solid var(--accent-dark);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
}

.card-header {
    background: var(--accent-dark);
    border-bottom: 1px solid var(--silver);
    color: var(--silver-light);
    font-weight: 500;
    padding: 15px 20px;
}

.card-body {
    padding: 20px;
}

/* Statistik-Cards */
.stat-card {
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--secondary-dark) 100%);
    border: 1px solid var(--silver);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(192, 192, 192, 0.2);
}

.stat-card h3 {
    font-size: 2.5rem;
    color: var(--silver-light);
    margin: 10px 0;
    font-weight: 300;
}

.stat-card p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Formulare */
.form-control, .form-select {
    background: var(--accent-dark);
    border: 1px solid var(--silver);
    color: var(--text-light);
    border-radius: 6px;
}

.form-control:focus, .form-select:focus {
    background: var(--secondary-dark);
    border-color: var(--silver-light);
    color: var(--text-light);
    box-shadow: 0 0 0 0.2rem rgba(192, 192, 192, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--silver);
    font-weight: 500;
    margin-bottom: 8px;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, #4a4a4a 0%, #2d2d2d 100%);
    border: 1px solid var(--silver);
    color: var(--silver-light);
    font-weight: 500;
    padding: 10px 24px;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a5a5a 0%, #3d3d3d 100%);
    border-color: var(--silver-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(192, 192, 192, 0.3);
}

.btn-success {
    background: var(--success);
    border: none;
}

.btn-danger {
    background: var(--danger);
    border: none;
}

.btn-warning {
    background: var(--warning);
    border: none;
    color: #fff;
}

/* Upload-Bereich */
.upload-area {
    border: 2px dashed var(--silver);
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    background: rgba(192, 192, 192, 0.05);
}

.upload-area:hover {
    border-color: var(--silver-light);
    background: rgba(192, 192, 192, 0.1);
}

.upload-area i {
    font-size: 3rem;
    color: var(--silver);
    margin-bottom: 15px;
}

/* Filter-Bereich */
.filter-section {
    background: var(--accent-dark);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 25px;
}

/* Galerie */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.gallery-item {
    position: relative;
    background: var(--accent-dark);
    border: 1px solid var(--silver);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(192, 192, 192, 0.3);
    border-color: var(--silver-light);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.gallery-item-info {
    padding: 12px;
    background: rgba(0, 0, 0, 0.3);
}

.gallery-item-info h6 {
    margin: 0 0 8px 0;
    color: var(--silver-light);
    font-size: 0.9rem;
    font-weight: 500;
}

.gallery-item-info .badge {
    font-size: 0.75rem;
    padding: 4px 8px;
}

.gallery-item-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

.gallery-item-overlay .btn {
    margin: 0 5px;
}

/* Status-Badge */
.badge.bg-success {
    background-color: var(--success) !important;
}

.badge.bg-warning {
    background-color: var(--warning) !important;
}

.badge.bg-danger {
    background-color: var(--danger) !important;
}

/* Modal/Lightbox */
.modal-content {
    background: var(--secondary-dark);
    border: 1px solid var(--silver);
}

.modal-header {
    border-bottom: 1px solid var(--accent-dark);
}

.modal-footer {
    border-top: 1px solid var(--accent-dark);
}

.modal-title {
    color: var(--silver-light);
}

.btn-close {
    filter: invert(1);
}

/* Lightbox spezifisch */
.lightbox-image {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    margin: 0 auto;
    display: block;
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--silver);
    color: white;
    padding: 15px 20px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s;
    z-index: 1;
}

.lightbox-nav:hover {
    background: rgba(0, 0, 0, 0.9);
}

.lightbox-nav.prev {
    left: 20px;
}

.lightbox-nav.next {
    right: 20px;
}

/* Pagination */
.pagination {
    justify-content: center;
    margin-top: 30px;
}

.pagination .page-link {
    background: var(--accent-dark);
    border: 1px solid var(--silver);
    color: var(--silver-light);
    margin: 0 3px;
    border-radius: 6px;
}

.pagination .page-link:hover {
    background: var(--secondary-dark);
    border-color: var(--silver-light);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, #4a4a4a 0%, #2d2d2d 100%);
    border-color: var(--silver-light);
}

/* Alert-Nachrichten */
.alert {
    border-radius: 6px;
    border: none;
}

.alert-success {
    background: rgba(76, 175, 80, 0.2);
    color: #81c784;
    border-left: 4px solid var(--success);
}

.alert-danger {
    background: rgba(244, 67, 54, 0.2);
    color: #e57373;
    border-left: 4px solid var(--danger);
}

.alert-warning {
    background: rgba(255, 152, 0, 0.2);
    color: #ffb74d;
    border-left: 4px solid var(--warning);
}

/* Tabellen */
.table {
    color: var(--text-light);
}

.table thead {
    background: var(--accent-dark);
    border-bottom: 2px solid var(--silver);
}

.table tbody tr {
    border-bottom: 1px solid var(--accent-dark);
    transition: background 0.2s;
}

.table tbody tr:hover {
    background: rgba(192, 192, 192, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .gallery-item img {
        height: 150px;
    }
    
    .main-container {
        padding: 20px 10px;
    }
    
    .stat-card h3 {
        font-size: 2rem;
    }
    
    .lightbox-nav {
        padding: 10px 15px;
        font-size: 1.2rem;
    }
    
    .lightbox-nav.prev {
        left: 10px;
    }
    
    .lightbox-nav.next {
        right: 10px;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .login-box {
        padding: 30px 20px;
    }
}

/* Loading Spinner */
.spinner-border {
    color: var(--silver);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--primary-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--silver);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--silver-light);
}