.nieuwsbrief-items {
    max-width: 450px;
    margin: 60px auto;
    padding: 30px;
    background-color: #0a0a12;
    border: 1px solid #8a2be2;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(138, 43, 226, 0.4);
}

.nieuwsbrief-koptekst h1 {
    font-family: 'Audiowide', sans-serif;
    color: #8a2be2;
    text-align: center;
    margin: 0 0 25px;
}

.nieuwsbrief-items .form-group {
    margin-bottom: 18px;
}

.nieuwsbrief-items label {
    display: block;
    margin-bottom: 6px;
    font-family: 'Audiowide', sans-serif;
    font-size: 0.9rem;
    color: #00aaff;
}

.nieuwsbrief-items input[type="text"],
.nieuwsbrief-items input[type="email"] {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 16px;
    font-family: 'Audiowide', sans-serif;
    font-size: 1rem;
    color: white;
    background-color: #14141f;
    border: 1px solid #8a2be2;
    border-radius: 8px;
    outline: none;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.nieuwsbrief-items input::placeholder {
    color: #8a8a99;
}

.nieuwsbrief-items input[type="text"]:focus,
.nieuwsbrief-items input[type="email"]:focus {
    border-color: #b36bff;
    box-shadow: 0 0 10px #8a2be2;
}

.submit-button {
    width: 100%;
    padding: 14px;
    font-family: 'Audiowide', sans-serif;
    font-size: 1rem;
    color: white;
    background-color: #8a2be2;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: box-shadow 0.2s, background-color 0.2s;
}

.submit-button:hover {
    background-color: #9d4df0;
    box-shadow: 0 0 15px #8a2be2;
}