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

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

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: #1a1a2e;
    color: #fff;
    padding: 16px 0;
}

header h1 {
    font-size: 20px;
    font-weight: 600;
}

header h1 a {
    color: #fff;
    text-decoration: none;
}

/* Main */
main {
    padding: 24px 0;
}

/* Card */
.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 24px;
    margin-bottom: 20px;
}

/* Toolbar */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    gap: 12px;
}

.toolbar .search-box {
    flex: 1;
    max-width: 400px;
}

.toolbar .search-box input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background: #4361ee;
    color: #fff;
}

.btn-primary:hover {
    background: #3a56d4;
}

.btn-secondary {
    background: #e9ecef;
    color: #333;
}

.btn-secondary:hover {
    background: #dee2e6;
}

.btn-danger {
    background: #e63946;
    color: #fff;
}

.btn-danger:hover {
    background: #c1121f;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 13px;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
}

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

th {
    font-weight: 600;
    font-size: 13px;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:hover {
    background: #f9f9f9;
}

td a {
    color: #4361ee;
    text-decoration: none;
    font-weight: 500;
}

td a:hover {
    text-decoration: underline;
}

.text-muted {
    color: #888;
    font-size: 13px;
}

/* Form */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    font-size: 14px;
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.form-group input[type="file"] {
    font-size: 14px;
}

.form-actions {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

/* Detail */
.detail-grid {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 8px 16px;
    margin-bottom: 20px;
}

.detail-grid dt {
    font-weight: 500;
    color: #666;
    font-size: 14px;
}

.detail-grid dd {
    font-size: 14px;
}

.download-url {
    background: #f0f0f0;
    padding: 8px 12px;
    border-radius: 6px;
    font-family: monospace;
    font-size: 13px;
    word-break: break-all;
    margin-top: 16px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 20px;
}

.pagination a,
.pagination span {
    display: inline-block;
    padding: 6px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
}

.pagination .active {
    background: #4361ee;
    color: #fff;
    border-color: #4361ee;
}

/* Nav tabs */
.nav-tabs {
    display: flex;
    gap: 4px;
}

.nav-tab {
    padding: 6px 14px;
    border-radius: 4px;
    color: #aaa;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.nav-tab:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.nav-tab.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
}

/* Form number input */
.form-group input[type="number"] {
    width: 120px;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

/* Empty */
.empty {
    text-align: center;
    padding: 40px;
    color: #888;
}

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
}