body {
    background: #f4f6f9;
    font-family: Arial, Helvetica, sans-serif;
}

.sidebar {
    width: 260px;
    min-height: 100vh;
    background: #111827;
    color: #fff;
    position: fixed;
    left: 0;
    top: 0;
    padding: 24px 18px;
}

.sidebar .brand {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 32px;
}

.sidebar a {
    color: #cbd5e1;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 12px;
    border-radius: 10px;
    margin-bottom: 6px;
    transition: 0.2s;
}

.sidebar a:hover,
.sidebar a.active {
    background: #2563eb;
    color: #fff;
}

.main {
    margin-left: 260px;
    padding: 24px;
}

.topbar {
    background: #fff;
    border-radius: 16px;
    padding: 18px 22px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
    margin-bottom: 24px;
}

.card-crm {
    border: 0;
    border-radius: 18px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.metric-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef2ff;
    color: #2563eb;
    font-size: 22px;
}

@media (max-width: 991px) {
    .sidebar {
        position: relative;
        width: 100%;
        min-height: auto;
    }

    .main {
        margin-left: 0;
    }
}