body {
    min-height: 100vh;
    background-image: url('https://images.unsplash.com/photo-1441986300917-64674bd600d8?w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 0;
}
.container {
    position: relative;
    z-index: 1;
}
.login-card {
    backdrop-filter: blur(6px);
    background: rgba(255, 255, 255, 0.92);
    border: none;
}
.brand-title {
    font-weight: 700;
    letter-spacing: 1px;
    color: #5a2d82;
}
.btn-primary {
    background-color: #5a2d82;
    border-color: #5a2d82;
}
.btn-primary:hover {
    background-color: #451e66;
    border-color: #451e66;
}
.toggle-password {
    cursor: pointer;
}