html,
body {
    height: 100%;
}

body {
    background-image: url("/images/bg.webp");
    background-size: cover;
    background-position: center;
    padding: 1rem;
}

.logo {
    max-width: 250px;
    margin-top: 2rem;
    margin-bottom: 2rem;
    width: 100%;
    height: auto;
}

.form-register {
    max-width: 420px;
    width: 100%;
    padding: 1.5rem;
}

.form-gift {
    max-width: 720px;
    width: 100%;
    padding: 1.5rem;
}

.invalid-feedback ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.invalid-feedback li {
    padding: 0;
    margin: 0;
}

/* Планшеты */
@media (max-width: 768px) {
    .form-register {
        max-width: 90%;
    }

    .logo {
        max-width: 200px;
        margin-top: 1.5rem;
        margin-bottom: 1.5rem;
    }
}

/* Мобильные устройства */
@media (max-width: 576px) {
    body {
        padding: 0.5rem;
    }

    .form-register {
        padding: 1rem;
        max-width: 100%;
    }

    .logo {
        max-width: 150px;
        margin-top: 1rem;
        margin-bottom: 1rem;
    }

    .language-switcher .btn {
        font-size: 0.875rem;
        padding: 0.375rem 0.75rem;
    }

    h1 {
        font-size: 1.25rem;
    }
}