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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

.header {
    margin-bottom: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2rem;
    color: #222;
    margin-bottom: 10px;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: #666;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #333;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
}

.btn:hover {
    background: #555;
}

.btn-danger {
    background: #dc3545;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    font-weight: 600;
    background: #fafafa;
}

.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

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

.badge-private {
    background: #fff3cd;
    color: #856404;
}

.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

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

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

.nav {
    margin-bottom: 20px;
    text-align: right;
}

.nav a {
    color: #666;
    text-decoration: none;
    margin-left: 15px;
}

.nav a:hover {
    color: #333;
}

.text-center {
    text-align: center;
}

.file-info {
    margin-bottom: 20px;
}

.file-info h2 {
    margin-bottom: 10px;
}

.file-meta {
    color: #666;
    font-size: 14px;
}