:root {
    --admin-primary: #0d73a5;
    --admin-bg: #f4f6f8;
    --admin-sidebar: #123047;
    --admin-border: #d8dfe7;
}

body.admin-body {
    margin: 0;
    background: var(--admin-bg);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.admin-login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d73a5 0%, #123047 100%);
    padding: 24px;
}

.admin-login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18);
}

.admin-login-title {
    font-size: 28px;
    font-weight: 700;
    color: #1f2a37;
    margin-bottom: 8px;
}

.admin-login-sub {
    color: #6f7f91;
    margin-bottom: 24px;
}

.admin-shell {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 240px;
    background: var(--admin-sidebar);
    color: #fff;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.admin-brand {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.admin-brand-title {
    font-size: 20px;
    font-weight: 700;
}

.admin-brand-sub {
    margin-top: 4px;
    font-size: 13px;
    opacity: 0.72;
}

.admin-nav {
    padding: 16px 12px;
    flex: 1;
}

.admin-nav-link {
    display: block;
    padding: 12px 14px;
    margin-bottom: 6px;
    border-radius: 10px;
    color: rgba(255, 255, 255, 0.82);
    text-decoration: none;
}

.admin-nav-link:hover,
.admin-nav-link.active {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.admin-sidebar-foot {
    padding: 16px 20px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.admin-user {
    font-size: 14px;
    margin-bottom: 8px;
}

.admin-logout {
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
    font-size: 13px;
}

.admin-main {
    flex: 1;
    min-width: 0;
}

.admin-topbar {
    background: #fff;
    border-bottom: 1px solid var(--admin-border);
    padding: 20px 28px;
}

.admin-page-title {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
    color: #1f2a37;
}

.admin-content {
    padding: 24px 28px 40px;
}

.admin-card {
    background: #fff;
    border: 1px solid var(--admin-border);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
}

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

.admin-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.admin-stat {
    background: #fff;
    border: 1px solid var(--admin-border);
    border-radius: 14px;
    padding: 18px;
}

.admin-stat-label {
    color: #6f7f91;
    font-size: 13px;
}

.admin-stat-value {
    margin-top: 8px;
    font-size: 28px;
    font-weight: 700;
    color: var(--admin-primary);
}

.table-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.form-textarea-lg {
    min-height: 220px;
}