:root {
    --merchant-primary: #409eff;
    --merchant-primary-dark: #337ecc;
    --merchant-sidebar: #1d2b3a;
    --merchant-sidebar-hover: #263b50;
    --merchant-bg: #f5f7fa;
    --merchant-border: #ebeef5;
    --merchant-text: #303133;
    --merchant-secondary: #909399;
}

html {
    font-size: 14px;
    min-height: 100%;
}

body {
    min-height: 100vh;
    margin: 0;
    background: var(--merchant-bg);
    color: var(--merchant-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

.merchant-shell {
    min-height: 100vh;
}

.merchant-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 1000;
    width: 240px;
    min-height: 100vh;
    padding: 0;
    overflow-y: auto;
    background: var(--merchant-sidebar);
    box-shadow: 2px 0 8px rgba(0, 0, 0, .08);
}

.merchant-brand {
    display: flex;
    align-items: center;
    min-height: 64px;
    padding: 0 24px;
    color: #fff;
    font-size: 17px;
    font-weight: 600;
    letter-spacing: .5px;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.merchant-brand i {
    margin-right: 10px;
    color: #79bbff;
    font-size: 20px;
}

.merchant-nav {
    padding: 12px;
}

.merchant-nav .nav-section {
    padding: 18px 12px 7px;
    color: #8d9aaa;
    font-size: 11px;
    letter-spacing: 1px;
}

.merchant-nav .nav-link {
    display: flex;
    align-items: center;
    min-height: 42px;
    margin: 3px 0;
    padding: 0 13px;
    color: #c8d1dc;
    border-radius: 4px;
    transition: background-color .2s, color .2s;
}

.merchant-nav .nav-link i {
    width: 22px;
    margin-right: 8px;
    font-size: 16px;
}

.merchant-nav .nav-link:hover {
    color: #fff;
    background: var(--merchant-sidebar-hover);
}

.merchant-nav .nav-link.active {
    color: #fff;
    background: var(--merchant-primary);
}

.merchant-main {
    min-height: 100vh;
    margin-left: 240px;
}

.merchant-header {
    position: sticky;
    top: 0;
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    padding: 0 32px;
    background: #fff;
    border-bottom: 1px solid var(--merchant-border);
}

.merchant-page-title {
    margin: 0;
    color: var(--merchant-text);
    font-size: 18px;
    font-weight: 500;
}

.merchant-user {
    display: flex;
    align-items: center;
    gap: 14px;
}

.merchant-user-name {
    color: var(--merchant-secondary);
    font-size: 13px;
}

.merchant-content {
    padding: 24px 32px 40px;
}

.card {
    border: 1px solid var(--merchant-border);
    border-radius: 4px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .04);
}

.card-header {
    min-height: 52px;
    padding: 15px 20px;
    color: var(--merchant-text);
    font-weight: 500;
    background: #fff;
    border-bottom: 1px solid var(--merchant-border);
}

.card-body {
    padding: 20px;
}

.table-responsive {
    overflow-x: auto;
    background: #fff;
    border: 1px solid var(--merchant-border);
    border-radius: 4px;
}

.table {
    margin-bottom: 0;
    color: var(--merchant-text);
    vertical-align: middle;
}

.table > :not(caption) > * > * {
    padding: 13px 16px;
    border-bottom-color: var(--merchant-border);
}

.table thead th {
    color: #606266;
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    background: #f5f7fa;
}

.table-hover > tbody > tr:hover > * {
    background: #f5faff;
}

.form-control,
.form-select {
    min-height: 36px;
    border-color: #dcdfe6;
    border-radius: 4px;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--merchant-primary);
    box-shadow: 0 0 0 2px rgba(64, 158, 255, .15);
}

.btn {
    border-radius: 4px;
}

.btn-primary {
    background: var(--merchant-primary);
    border-color: var(--merchant-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--merchant-primary-dark);
    border-color: var(--merchant-primary-dark);
}

.badge {
    padding: 5px 9px;
    font-weight: 400;
    border-radius: 12px;
}

@media (max-width: 767.98px) {
    .merchant-sidebar {
        position: static;
        width: 100%;
        min-height: auto;
    }

    .merchant-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
        padding: 8px 12px 12px;
    }

    .merchant-nav .nav-section {
        display: none;
    }

    .merchant-nav .nav-item {
        flex: 1 1 45%;
    }

    .merchant-nav .nav-link {
        justify-content: center;
        min-height: 38px;
        padding: 0 8px;
        font-size: 13px;
    }

    .merchant-nav .nav-link i {
        width: auto;
        margin-right: 6px;
    }

    .merchant-main {
        margin-left: 0;
    }

    .merchant-header {
        position: static;
        padding: 0 16px;
    }

    .merchant-content {
        padding: 16px;
    }

    .merchant-user-name {
        display: none;
    }

    .card-body {
        padding: 16px;
    }
}