body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f6f8;
}

.auth-bg {
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f6f8, #ffffff);
}

.auth-card {
    max-width: 520px;
    background: #fff;
    padding: 32px;
    border-radius: 18px;
    box-shadow: 0 15px 40px rgba(0,0,0,.08);
}

.btn-primary {
    background: #111;
    border-color: #111;
}

.btn-primary:hover {
    background: #333;
    border-color: #333;
}

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

.sidebar {
    width: 250px;
    background: #111;
    color: white;
    padding: 24px;
}

.brand {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 30px;
}

.sidebar nav a {
    display: block;
    color: #ddd;
    text-decoration: none;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.sidebar nav a:hover {
    color: white;
}

.main-content {
    flex: 1;
    padding: 32px;
    background: #f5f6f8;
}

.card-clean {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 10px 30px rgba(0,0,0,.06);
}

@media (max-width: 768px) {
    .app-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }
}

.app-footer {
    margin-top: 40px;
    padding-top: 18px;
    border-top: 1px solid #ddd;
    color: #777;
}