body {
    background: radial-gradient(circle at 20% 20%, #f5f7fb 0, #eef2f7 35%, #e7ebf2 70%, #e3e7ef 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 1.5rem;
}
.login-card {
    width: 100%;
    max-width: 520px;
    border: 1px solid #e7ebf2;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
    background-color: #fff;
}
.card-header {
    background-color: #fff;
    border-bottom: 1px solid #eef1f6;
    padding-top: 2rem;
    padding-bottom: 1rem;
    border-radius: 12px 12px 0 0 !important;
    text-align: center;
}
.brand-logo {
    margin-bottom: 0.5rem;
}
.brand-logo img {
    height: 64px;
    width: auto;
    object-fit: contain;
}
.card-body {
    padding: 2rem;
}
.form-label {
    font-weight: 600;
    color: #2d3648;
}
.form-control {
    border: 1px solid #e1e6ef;
}
.form-control:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}
.btn-primary {
    padding: 0.6rem 1rem;
    font-weight: 500;
    border-radius: 10px;
}
.footer-text {
    text-align: center;
    margin-top: 1.5rem;
    color: #6c757d;
    font-size: 0.875rem;
}
.footer-text a {
    text-decoration: none;
    color: #6c757d;
}
.footer-text a:hover {
    color: #0d6efd;
}

@media (max-width: 575.98px) {
    body {
        align-items: flex-start;
        padding: 1.25rem;
    }
    .login-card {
        max-width: 100%;
        margin-top: 1.5rem;
        box-shadow: 0 6px 16px rgba(15, 23, 42, 0.05);
    }
    .card-header {
        padding-top: 1.5rem;
        padding-bottom: 0.75rem;
    }
    .card-body {
        padding: 1.25rem;
    }
    .brand-logo img {
        height: 56px;
    }
}