* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;

    font-family: Arial, Helvetica, sans-serif;

    background:
        radial-gradient(
            circle at top left,
            rgba(0, 122, 184, 0.35),
            transparent 40%
        ),
        radial-gradient(
            circle at bottom right,
            rgba(46, 0, 184, 0.35),
            transparent 40%
        ),
        linear-gradient(
            135deg,
            #080b14,
            #111827
        );

    color: #111;

    display: flex;
    justify-content: center;
    align-items: center;

    padding: 80px 20px 40px;
}

.terug-button {
    position: fixed;

    top: 25px;
    left: 25px;

    display: inline-flex;
    align-items: center;
    gap: 8px;

    padding: 11px 18px;

    color: white;
    background: rgba(255, 255, 255, 0.1);

    border: 1px solid rgba(255, 255, 255, 0.2);

    border-radius: 10px;

    text-decoration: none;

    font-size: 14px;
    font-weight: 600;

    backdrop-filter: blur(10px);

    transition: all 0.25s ease;
}

.terug-button:hover {
    background: white;
    color: #111;

    transform: translateX(-3px);
}

.contact-container {
    width: 100%;
    max-width: 620px;

    background: rgba(255, 255, 255, 0.97);

    padding: 45px;

    border-radius: 22px;

    box-shadow:
        0 25px 70px rgba(0, 0, 0, 0.35);

    animation: fadeIn 0.6s ease;
}

.contact-header {
    text-align: center;

    margin-bottom: 35px;
}

.contact-icon {
    display: inline-flex;

    align-items: center;
    justify-content: center;

    width: 55px;
    height: 55px;

    margin-bottom: 15px;

    background: #111;
    color: white;

    border-radius: 50%;

    font-size: 25px;
}

.contact-header h1 {
    font-size: 32px;

    color: #111;

    margin-bottom: 10px;
}

.contact-header p {
    color: #777;

    font-size: 15px;

    line-height: 1.6;
}

form {
    display: flex;
    flex-direction: column;

    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 14px;

    font-weight: 700;

    color: #222;
}

input,
textarea {
    width: 100%;

    padding: 14px 16px;

    font-family: inherit;
    font-size: 15px;

    color: #111;

    background: #f7f7f7;

    border: 1px solid #ddd;

    border-radius: 10px;

    outline: none;

    transition:
        border-color 0.25s ease,
        box-shadow 0.25s ease,
        background 0.25s ease;
}

input {
    height: 50px;
}

textarea {
    min-height: 140px;

    resize: vertical;
}

input::placeholder,
textarea::placeholder {
    color: #999;
}

input:focus,
textarea:focus {
    background: white;

    border-color: #111;

    box-shadow:
        0 0 0 3px rgba(17, 17, 17, 0.08);
}

.verstuur-button {
    display: flex;

    align-items: center;
    justify-content: center;

    gap: 12px;

    width: 100%;

    padding: 15px 20px;

    margin-top: 5px;

    border: none;

    border-radius: 10px;

    background: #111;
    color: white;

    font-size: 16px;
    font-weight: 700;

    cursor: pointer;

    transition: all 0.25s ease;
}

.verstuur-button span {
    font-size: 20px;

    transition: transform 0.25s ease;
}

.verstuur-button:hover {
    background: #333;

    transform: translateY(-2px);

    box-shadow:
        0 8px 20px rgba(0, 0, 0, 0.2);
}

.verstuur-button:hover span {
    transform: translateX(5px);
}

.verstuur-button:active {
    transform: translateY(0);
}

.melding {
    min-height: 20px;

    text-align: center;

    font-size: 14px;

    font-weight: 600;

    margin-top: 2px;
}

@keyframes fadeIn {

    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }

}

@media (max-width: 600px) {

    body {
        padding: 80px 15px 30px;
    }

    .terug-button {
        top: 18px;
        left: 18px;
    }

    .contact-container {
        padding: 30px 22px;

        border-radius: 18px;
    }

    .contact-header h1 {
        font-size: 27px;
    }

    .contact-header p {
        font-size: 14px;
    }

    input {
        height: 48px;
    }

}