body {
    background: linear-gradient(135deg, #1e90ff 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-box {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    padding: 40px 32px 32px 32px;
    max-width: 370px;
    width: 100%;
    text-align: center;
}
.login-title {
    font-size: 2rem;
    font-weight: bold;
    color: #1e90ff;
    margin-bottom: 18px;
}
.btn-login {
    background: linear-gradient(90deg, #1e90ff 0%, #764ba2 100%);
    color: #fff;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    padding: 14px 0;
    width: 100%;
    font-size: 1.1rem;
    margin-top: 18px;
    transition: background 0.2s;
}
.btn-login:hover {
    background: linear-gradient(90deg, #764ba2 0%, #1e90ff 100%);
}
.vbi-logo {
    width: 90px;
    margin-bottom: 18px;
}
.login-desc {
    color: #555;
    margin-bottom: 18px;
}