body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #f8f8f8;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.logo {
    max-width: 300px;
    width: 100%;
    height: auto;
    margin-bottom: 40px;
}

.btn-carta {
    display: inline-block;
    padding: 15px 40px;
    background: #0077b6;
    color: #fff;
    text-decoration: none;
    font-size: 1.2rem;
    border-radius: 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: background 0.2s;
    font-weight: bold;
    letter-spacing: 1px;
}

.btn-carta:hover {
    background: #023e8a;
}