body {
    background-color: #0b2e66; /* Un albastru deschis */
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.card {
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: #00bcd4; /* Un albastru mai intens */
    color: white;
    text-align: center;
    border-radius: 10px 10px 0 0;
}

.btn-primary {
    background-color: #0097a7; /* Un albastru mai închis */
    border-color: #0097a7;
}

.btn-primary:hover {
    background-color: #00838f;
    border-color: #00838f;
}

.form-control:focus {
    border-color: #00bcd4;
    box-shadow: 0 0 0 0.2rem rgba(0, 188, 212, 0.25);
}