:root {
    --dark: #1d1d1b;
    --primary: #008bcb;
    --light-grey: #f3f3f3;
    --dark-grey: #bebebe;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    color: var(--dark);
    font-family: 'Open Sans', sans-serif;
}

.container {
    width: 1030px;
    margin: 0 auto;
    max-width: 100%;
    padding: 0 15px;
}

.col-50 {
    width: 50%;
}

.text-center {
    text-align: center;
}

.flex-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.block {
    margin-bottom: 20px;
}

.partner-block:not(:last-of-type) {
    border-bottom: 1px solid var(--dark-grey);
    padding-bottom: 25px;
}
.partner-block label {
    margin-right: 20px;
}

/*-- SECTIONS / STRUKTUR --*/
header {
    text-align: center;
    padding: 30px 15px;
}
header img {
    max-width: 100%;
}
main {
    background: var(--light-grey);
    padding: 50px 0;
}
section {
    position: relative;
    margin-bottom: 75px;
}
section::before {
    content: "";
    width: 100%;
    height: 1px;
    background: var(--dark-grey);
    position: absolute;
    left: 0;
    top: 16px;
}

/*-- HEADLINES --*/
.headlines {
    margin-bottom: 75px;
}

h1 {
    color: var(--primary);
    font-size: 26px;
    font-weight: 800;
}
h2 {
    font-size: 22px;
    font-weight: 400;
    margin-bottom: 25px;
}
section > h2 {
    position: relative;
    background: var(--light-grey);
    width: fit-content;
    padding-right: 20px;
}
h3 {
    font-size: 18px;
    font-weight: 700;
    margin: 40px 0 15px 0;
}

/*-- FORM INPUT --*/
input[type="text"], input[type="tel"], input[type="email"] {
    width: 100%;
    padding: 15px 20px;
    border-radius: 5px;
    border: none;
    box-shadow: 0px 0px 16px 0px rgba(0, 0, 0, 0.1);
    font-family: 'Open Sans', sans-serif;
    font-size: 18px;
}
input[type="text"]:focus, input[type="tel"]:focus, input[type="email"]:focus {
    outline: 1px solid var(--primary); 
}
input::placeholder {
    opacity: 1;
}
input[type="text"]:focus::placeholder, input[type="tel"]:focus::placeholder, input[type="email"]:focus::placeholder,
#email-adressen input[type="email"]::placeholder{
    opacity: .4;
}
#email-adressen input[type="email"] {
    width: 75%;
}
#email-adressen input[type="email"]::placeholder {
    font-style: italic;
}
input[type="radio"] + label,
input[type="radio"] {
    cursor: pointer;
}

/*-- BUTTONS --*/
.button-wrapper {
    margin: 130px 0 50px 0;
}
.btn-primary, .btn-secondary {
    font-family: 'Open Sans', sans-serif;
    font-size: 18px;
    border: none;
    padding: 15px 20px;
    border-radius: 5px;
    width: 100%;
    cursor: pointer;
    text-transform: uppercase;
    font-weight: 600;
    background: var(--dark);
    color: #fff;
    transition: 0.2s ease-in-out;
}
.btn-primary {
    background: var(--primary);
}
.btn-primary:hover, .btn-secondary:hover {
    background: var(--dark-grey);
    color: var(--dark);
}
.btn-primary:hover {
    color: var(--primary);
}

footer {
    background: var(--dark-grey);
    padding: 15px 0;
}
footer a {
    color: var(--dark);
    text-decoration: none;
    transition: 0.2s ease-in-out;
}
footer a:hover {
    color: var(--primary);
}

/*-- RESPONSIVE --*/
@media only screen and (max-width: 500px) {
    .flex-box {
        display: block;
    }
    .col-50 {
        width: 100%;
        margin-bottom: 25px;
    }
    #email-adressen input[type="email"] {
        width: 100%;
    }
    #email-adressen label {
        display: block;
        margin-bottom: 10px;
    }
}