/* 卡密系统样式 */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
}

/* 容器 */
.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 20px;
}

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

/* 卡片 */
.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 32px;
    margin-top: 40px;
}

.card-header {
    text-align: center;
    margin-bottom: 24px;
}

.card-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
}

.card-header p {
    color: var(--gray-500);
    font-size: 14px;
    margin-top: 4px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s;
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.form-control::placeholder {
    color: var(--gray-300);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    width: 100%;
}

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

.btn-primary:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
    border-radius: 6px;
}

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}
.btn-outline:hover { background: var(--gray-100); }

/* 消息提示 */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
}

.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }

/* 导航栏 */
.navbar {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    gap: 16px;
    align-items: center;
}

.navbar-nav a {
    color: var(--gray-700);
    text-decoration: none;
    font-size: 14px;
}

.navbar-nav a:hover { color: var(--primary); }

/* 表格 */
.table-wrapper {
    overflow-x: auto;
    margin-top: 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
}

tr:hover { background: var(--gray-50); }

/* 徽章 */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: #ecfdf5; color: #065f46; }
.badge-danger { background: #fef2f2; color: #991b1b; }
.badge-warning { background: #fffbeb; color: #92400e; }
.badge-info { background: #eff6ff; color: #1e40af; }

/* 统计卡片 */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-card .label {
    font-size: 13px;
    color: var(--gray-500);
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin-top: 4px;
}

/* 分页 */
.pagination {
    display: flex;
    gap: 4px;
    margin-top: 16px;
    justify-content: center;
}

.pagination a, .pagination span {
    padding: 6px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    font-size: 13px;
    text-decoration: none;
    color: var(--gray-700);
}

.pagination .active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* 响应式 */
@media (max-width: 640px) {
    .container { padding: 12px; }
    .card { padding: 20px; margin-top: 20px; }
    .stats { grid-template-columns: 1fr 1fr; }
    table { font-size: 12px; }
    th, td { padding: 8px; }
}