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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Navbar */
.navbar {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    font-size: 1.5rem;
}

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

.nav-actions span {
    margin-right: 1rem;
}

/* Auth Box */
.auth-box {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.auth-box h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 2rem;
}

.auth-box h2 {
    margin-bottom: 1.5rem;
    color: #34495e;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="file"],
.form-group input[type="text"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input[type="checkbox"] {
    margin-right: 0.5rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-success {
    background-color: #27ae60;
    color: white;
}

.btn-success:hover {
    background-color: #229954;
}

/* Auth Switch */
.auth-switch {
    text-align: center;
    margin-top: 1rem;
}

.auth-switch a {
    color: #3498db;
    text-decoration: none;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Upload Box */
.upload-box {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.upload-box h2 {
    margin-bottom: 1.5rem;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background-color: #3498db;
    transition: width 0.3s;
    width: 0%;
}

#progressText {
    text-align: center;
    color: #7f8c8d;
}

/* Photos Grid */
.photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.photo-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.photo-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.photo-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.photo-info {
    padding: 1rem;
}

.photo-info h3 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.photo-meta {
    font-size: 0.8rem;
    color: #7f8c8d;
    margin-bottom: 0.5rem;
}

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

.photo-actions button {
    flex: 1;
    padding: 0.5rem;
    font-size: 0.85rem;
}

.privacy-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.privacy-badge.public {
    background-color: #d4edda;
    color: #155724;
}

.privacy-badge.private {
    background-color: #f8d7da;
    color: #721c24;
}

/* Modal */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.8);
}

.modal-content {
    background-color: #fefefe;
    margin: 2% auto;
    padding: 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 1000px;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: #000;
}

#photoDetail img {
    width: 100%;
    max-height: 70vh;
    object-fit: contain;
    margin-bottom: 1rem;
}

.photo-detail-info {
    margin-top: 1rem;
}

.photo-detail-info h2 {
    margin-bottom: 1rem;
}

.metadata-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1rem;
    margin-top: 1rem;
}

.metadata-label {
    font-weight: 600;
    color: #555;
}

.metadata-value {
    color: #777;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .photos-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }

    .photo-card img {
        height: 150px;
    }
}

/* Loading spinner */
.loading {
    text-align: center;
    padding: 2rem;
    color: #7f8c8d;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.success-message {
    background-color: #d4edda;
    color: #155724;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}