body {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
}

header h1 {
    margin-bottom: 0.5rem;
}

nav {
    margin: 1.5rem 0;
    padding: 1rem 0;
    border-bottom: 2px solid #ddd;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

nav form {
    margin-left: auto;
}

.nav-link {
    margin-right: 0;
    color: #000;
    text-decoration: underline;
    font-size: 1rem;
    transition: opacity 0.2s;
}

.nav-link:hover {
    opacity: 0.6;
}

.nav-link.active {
    font-weight: bold;
    text-decoration: underline;
}

nav button {
    margin: 0;
}

.button-primary {
    background: #000;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    display: inline-block;
}

.button-primary:hover {
    background: #333;
}

.button-secondary {
    background: #f5f5f5;
    color: #333;
    border: 1px solid #ddd;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.button-secondary:hover {
    background: #e0e0e0;
}

.button-cancel {
    color: #999;
    text-decoration: none;
    margin-left: 1rem;
    font-size: 1rem;
}

.button-cancel:hover {
    color: #666;
}

.button-delete {
    background: none;
    border: none;
    color: #dc3545;
    text-decoration: underline;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0;
}

.button-delete:hover {
    color: #bd2130;
}

input[type="text"],
input[type="url"],
input[type="password"],
select,
textarea {
    padding: 0.75rem 1rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    width: 100%;
    box-sizing: border-box;
}

input[type="text"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: #666;
}

label {
    display: block;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.welcome-box {
    background: #f5f5f5;
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    color: #666;
    font-size: 0.95rem;
}

.flash {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    border-left: 4px solid;
}

.flash-success {
    background: #f5f5f5;
    border-color: #999;
    color: #666;
}

.flash-error {
    background: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

.flash-warning {
    background: #fff3cd;
    border-color: #ffc107;
    color: #856404;
}

.warning-banner {
    background: #fff3cd;
    border: 2px solid #ffc107;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
}

.stats-summary {
    background: #f8f9fa;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
    border: 1px solid #ddd;
}

.stats-summary h3, .stats-summary h4 {
    margin-top: 0;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
    margin: 2rem 0;
}

.link-card {
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.link-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.link-actions {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.2s;
}

.link-card:hover .link-actions,
.image-card:hover .link-actions {
    opacity: 1;
}

.link-actions a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    text-decoration: none;
    color: #333;
    font-size: 0.9rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    transition: background 0.2s, transform 0.2s;
}

.link-actions a:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
}

.link-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: #f0f0f0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.link-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.no-image-text {
    color: #999;
    font-size: 0.85rem;
    text-align: center;
    padding: 1rem;
}

.link-content {
    padding: 0.75rem;
}

.link-content h3 {
    margin: 0 0 0.5rem 0;
    font-size: 0.95rem;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.platform-badge {
    display: inline-block;
    background: #6c757d;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-right: 0.5rem;
}

.project-badge {
    display: inline-block;
    background: #9ca3af;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-right: 0.5rem;
}

.private-badge {
    display: inline-block;
    background: #dc3545;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.link-date {
    font-size: 0.75rem;
    color: #999;
    margin: 0.25rem 0;
}

.link-note {
    font-size: 0.85rem;
    color: #555;
    margin: 0.5rem 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.link-url {
    display: inline-block;
    margin-top: 0.5rem;
    color: #007bff;
    text-decoration: none;
    font-size: 0.85rem;
}

.link-url:hover {
    text-decoration: underline;
}

.filter-link {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    margin: 0.1rem;
    border: 1px solid #ddd;
    border-radius: 3px;
    text-decoration: none;
    color: #333;
    background: white;
    font-size: 0.85rem;
}

.filter-link:hover {
    background: #f5f5f5;
}

.filter-link.active {
    background: #000;
    color: white;
    border-color: #000;
}

.view-switcher {
    display: flex;
    gap: 0.25rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
}

.view-option {
    padding: 0.5rem 0.75rem;
    background: white;
    color: #333;
    text-decoration: none;
    border-right: 1px solid #ddd;
    font-size: 1.1rem;
    transition: background 0.2s;
}

.view-option:last-child {
    border-right: none;
}

.view-option:hover {
    background: #f5f5f5;
}

.view-option.active {
    background: #000;
    color: white;
}

.link-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem 0;
}

.list-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: box-shadow 0.2s;
}

.list-item:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.list-item:hover .link-actions {
    opacity: 1;
}

.list-item h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
}

.list-item h3 a {
    color: #333;
    text-decoration: none;
}

.list-item h3 a:hover {
    color: #007bff;
    text-decoration: underline;
}

.list-item .link-actions {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
}

.link-grid-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
    margin: 2rem 0;
}

.image-card {
    position: relative;
    aspect-ratio: 1;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    background: #f0f0f0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.image-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-card .no-image-text {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 0.9rem;
}

.admin-stats {
    background: #e7f3ff;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
    border: 1px solid #007bff;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.admin-table th, .admin-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.admin-table th {
    background: #f8f9fa;
    font-weight: bold;
}

.no-activity {
    color: #dc3545;
    font-style: italic;
}

.on-track-badge {
    display: inline-block;
    background: #28a745;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

.off-track-badge {
    display: inline-block;
    background: #ffc107;
    color: #333;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

.btn-small {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    margin: 0.25rem;
    font-size: 0.85rem;
    text-decoration: none;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.btn-small:hover {
    background: #0056b3;
}

.digest-preview {
    background: #f8f9fa;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
    border: 1px solid #ddd;
}

.digest-content {
    background: white;
    padding: 1.5rem;
    border-radius: 4px;
}

.digest-html {
    margin: 2rem 0;
}

footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid #ddd;
    text-align: center;
    color: #666;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }
    
    header h1 {
        font-size: 1.5rem;
        line-height: 1.2;
        margin-bottom: 0.25rem;
    }
    
    .welcome-box {
        padding: 0.5rem 0.75rem;
        margin-top: 0.25rem;
        font-size: 0.85rem;
    }
    
    nav {
        margin: 1rem 0 0.75rem 0;
        padding: 0.75rem 0;
        gap: 1rem;
    }
    
    .nav-link {
        margin-right: 0;
        font-size: 0.9rem;
    }
    
    nav button {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
        border: none;
        background: transparent;
        color: #000;
        text-decoration: none;
        font-weight: normal;
    }
    
    main {
        margin-top: 0.5rem;
    }
    
    input[type="text"],
    input[type="url"],
    input[type="password"],
    select,
    textarea {
        padding: 0.85rem 1rem;
        font-size: 1.05rem;
    }
    
    label {
        font-size: 0.95rem;
    }
    
    h2 {
        font-size: 1.3rem;
        margin-top: 0.5rem;
        margin-bottom: 0.75rem;
    }
    
    h3 {
        font-size: 1.1rem;
    }
    
    .link-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 0.5rem;
        margin: 1rem 0;
    }
    
    .link-image {
        height: 160px;
    }
    
    .link-content {
        padding: 0.5rem;
    }
    
    .link-list {
        gap: 0.75rem;
        margin: 1rem 0;
    }
    
    .list-item {
        padding: 0.75rem;
    }
    
    .link-grid-images {
        gap: 0.5rem;
        margin: 1rem 0;
    }
    
    .admin-table {
        font-size: 0.85rem;
    }
    
    .admin-table th, .admin-table td {
        padding: 0.5rem;
    }
    
    footer {
        margin-top: 2rem;
        padding-top: 1rem;
        font-size: 0.85rem;
    }
}

@media (min-width: 1024px) {
    .link-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}