body {
    background: #f8fafc;
    color: #0f172a;
    font-family: Arial, sans-serif;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2563eb, #1e293b);
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 10px 30px rgba(0,0,0,.15);
}

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

.sidebar {
    width: 260px;
    background: #0f172a;
    color: white;
    padding: 24px 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.sidebar .nav-link {
    border-radius: 10px;
    padding: 10px 12px;
}

.sidebar .nav-link:hover {
    background: rgba(255,255,255,.08);
}

.content {
    flex: 1;
    overflow-x: auto;
}

.dashboard-card {
    border-radius: 16px;
}

.card {
    border-radius: 16px;
}

table td, table th {
    vertical-align: middle;
}

@media (max-width: 992px) {
    .app-shell {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }
}