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

:root {
    --primary-color: #4a90e2;
    --primary-dark: #357abd;
    --secondary-color: #f5f7fa;
    --text-color: #333;
    --text-light: #666;
    --border-color: #ddd;
    --success-color: #4caf50;
    --error-color: #f44336;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9fafb;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.nav-brand .nav-alias {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.3rem;
    padding: 0.15rem 0.75rem;
    border-radius: 999px;
    background: rgba(74, 144, 226, 0.12);
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    text-decoration: none;
    color: var(--text-color);
    border-radius: 6px;
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav-link:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

.nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

.nav-link .icon {
    width: 20px;
    height: 20px;
}

/* Main Content */
.main-content {
    padding: 2rem 20px;
    min-height: calc(100vh - 80px);
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.login-box h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.login-subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
}

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

.btn-secondary:hover {
    background-color: #e1e4e8;
}

.btn-block {
    width: 100%;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.form-actions .btn {
    flex: 1;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Settings */
.settings-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.settings-container h2 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.settings-info {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--secondary-color);
    border-radius: 6px;
}

.settings-info h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.settings-info p {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.settings-info code {
    background-color: #e1e4e8;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

/* Gallery Views */
.breadcrumb {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.section {
    margin-bottom: 3rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-title {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-color);
}

/* Sort Controls */
.sort-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: auto;
    padding: 0;
    background: transparent;
    box-shadow: none;
}

.sort-label {
    font-size: 0.8rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sort-select {
    min-width: 150px;
    height: 38px;
    padding: 0 2.25rem 0 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: #fff;
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(15, 23, 42, 0.08);
}

.sort-select:focus,
.sort-select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.12);
    outline: none;
}

.sort-order-btn {
    width: 38px;
    height: 38px;
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    background: var(--primary-color);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.sort-order-btn .icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.sort-order-btn:hover,
.sort-order-btn:focus {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    outline: none;
}

/* Folder Grid */
.folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.folder-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-color);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.folder-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.folder-icon svg {
    width: 100%;
    height: 100%;
}

.folder-name {
    text-align: center;
    font-weight: 500;
    word-break: break-word;
}

/* Photo Grid */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.photo-item {
    position: relative;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
}

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

.photo-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.photo-info {
    padding: 0.75rem;
}

.photo-name {
    font-weight: 500;
    margin-bottom: 0.35rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.95rem;
}

.photo-meta {
    font-size: 0.8rem;
    color: var(--text-light);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem;
    line-height: 1.4;
}

.meta-item {
    white-space: nowrap;
}

.meta-separator {
    opacity: 0.5;
}

/* Timeline View */
.timeline-header {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.timeline-header h2 {
    margin-bottom: 0.5rem;
}

.timeline-subtitle {
    color: var(--text-light);
}

.timeline-section {
    margin-bottom: 3rem;
}

.timeline-date {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.timeline-date h3 {
    font-size: 1.25rem;
    color: var(--text-color);
}

.timeline-count {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.1rem;
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn 0.3s;
}

.lightbox.active {
    display: block;
}

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

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 1001;
    transition: var(--transition);
}

.lightbox-close:hover {
    color: #ccc;
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 30px;
    padding: 1rem 1.5rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1001;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

.lightbox-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
}

/* Lightbox Controls */
.lightbox-controls {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 1001;
    display: flex;
    gap: 0.5rem;
}

.lightbox-original-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background-color: rgba(74, 144, 226, 0.9);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.lightbox-original-btn:hover {
    background-color: var(--primary-color);
}

.lightbox-original-btn:disabled {
    background-color: rgba(255, 255, 255, 0.2);
    cursor: not-allowed;
    opacity: 0.7;
}

.lightbox-original-btn .icon {
    width: 18px;
    height: 18px;
}

/* Lightbox Loading */
.lightbox-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1002;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    display: flex;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

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

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.lightbox-loading p {
    color: white;
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        width: 100%;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-link {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
    }
    
    .nav-link .icon {
        width: 16px;
        height: 16px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .sort-controls {
        width: 100%;
        margin-left: 0;
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .sort-select {
        flex: 1 1 auto;
    }
    
    .folder-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .photo-item img {
        height: 150px;
    }
    
    .timeline-date {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .lightbox-prev,
    .lightbox-next {
        padding: 0.5rem 1rem;
        font-size: 24px;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
    
    .lightbox-close {
        right: 20px;
        font-size: 30px;
    }
    
    .lightbox-controls {
        top: 10px;
        left: 10px;
    }
    
    .lightbox-original-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
    
    .lightbox-original-btn .icon {
        width: 16px;
        height: 16px;
    }
    
    .spinner {
        width: 40px;
        height: 40px;
    }
    
    .settings-container {
        padding: 1.5rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .nav-brand h1 {
        font-size: 1.2rem;
    }
    
    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .login-box {
        padding: 1.5rem;
    }
}