/**
 * Photo Gallery Styles
 * Modern, responsive design with mobile-first approach
 */

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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --danger-color: #dc2626;
    --success-color: #16a34a;
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

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

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

/* Header */
header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

header h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    background-color: #475569;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

.btn-nav {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--text-color);
    padding: 0.5rem 1rem;
}

.btn-nav:hover {
    background-color: white;
}

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

.login-box {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-weight: 400;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.25rem;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
}

.error-message {
    background-color: #fee2e2;
    color: var(--danger-color);
    padding: 0.75rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

/* Stats Section */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-item {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    display: block;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.gallery-item {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.photo-container {
    position: relative;
    width: 100%;
    padding-top: 75%; /* 4:3 aspect ratio */
    background-color: #f1f5f9;
    overflow: hidden;
}

.photo-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s;
}

.photo-container img:hover {
    transform: scale(1.05);
}

.photo-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 0.75rem;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent);
    opacity: 0;
    transition: opacity 0.2s;
}

.photo-container:hover .photo-overlay {
    opacity: 1;
}

.photo-directory {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--text-color);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 500;
}

.photo-info {
    padding: 1rem;
}

.photo-filename {
    font-weight: 500;
    margin-bottom: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.875rem;
}

.photo-caption p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.photo-actions {
    display: flex;
    gap: 0.5rem;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

.empty-state h2 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.empty-state p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.empty-state code {
    display: block;
    background-color: var(--bg-color);
    padding: 1rem;
    border-radius: var(--radius);
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
    margin-top: 1rem;
}

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

.lightbox.active {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 1001;
    transition: color 0.2s;
}

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

.lightbox-content {
    max-width: 1200px;
    width: 100%;
    margin: auto;
}

.lightbox-content img {
    width: 100%;
    height: auto;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.lightbox-info {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.lightbox-directory {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.lightbox-filename {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.lightbox-caption {
    color: var(--text-light);
    line-height: 1.6;
}

.lightbox-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow: auto;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.modal-content h3 {
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    justify-content: flex-end;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.25rem;
    }
    
    .header-content {
        justify-content: center;
        text-align: center;
    }
    
    .username {
        display: none;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .lightbox-close {
        top: 10px;
        right: 15px;
        font-size: 30px;
    }
    
    .lightbox-controls {
        flex-direction: column;
    }
    
    .lightbox-controls .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .photo-actions {
        flex-direction: column;
    }
}

/* Loading animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}