body {
    background: linear-gradient(135deg, #198754 0%, #0f5132 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.card-auth {
    border: none;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    overflow: hidden;
    width: 100%;
    max-width: 450px;
}
.auth-header {
    background-color: #fff;
    padding: 30px 30px 10px 30px;
    text-align: center;
}
.logo-icon {
    font-size: 3rem;
    color: #198754;
}
.btn-success {
    background-color: #198754;
    border: none;
    padding: 12px;
    font-weight: 600;
}
.btn-success:hover {
    background-color: #146c43;
}
.form-control {
    padding: 12px;
    border-radius: 8px;
    background-color: #f8f9fa;
}
.form-control:focus {
    background-color: #fff;
    border-color: #198754;
    box-shadow: 0 0 0 0.25rem rgba(25, 135, 84, 0.25);
}