/* 管理后台样式 */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #f59e0b;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.navbar .nav-links {
    display: flex;
    gap: 8px;
}

.navbar .nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.navbar .nav-links a:hover,
.navbar .nav-links a.active {
    color: var(--primary);
    background: #eef2ff;
}

.navbar .user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-sm { padding: 4px 10px; font-size: 13px; }

/* 卡片 */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

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

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 20px;
}

.stat-card .stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

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

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

th {
    font-weight: 600;
    color: var(--text-muted);
    background: #f8fafc;
}

tr:hover { background: #f8fafc; }

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

.badge-active { background: #dcfce7; color: #166534; }
.badge-expired { background: #fee2e2; color: #991b1b; }
.badge-revoked { background: #f1f5f9; color: #64748b; }
.badge-monthly { background: #dbeafe; color: #1e40af; }
.badge-yearly { background: #fef3c7; color: #92400e; }
.badge-permanent { background: #f3e8ff; color: #6b21a8; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* 登录页 */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.login-card h1 {
    font-size: 24px;
    text-align: center;
    margin-bottom: 32px;
    color: var(--text);
}

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

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

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.form-actions {
    margin-top: 24px;
}

.form-actions .btn {
    width: 100%;
    padding: 12px;
    font-size: 16px;
}

.error-msg {
    color: var(--danger);
    font-size: 13px;
    margin-top: 6px;
    display: none;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s;
}

.toast.show { opacity: 1; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }

.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.modal {
    background: white;
    border-radius: 12px;
    padding: 24px;
    min-width: 360px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}