body {
    width: 100%;
    font-size: 3vw;
}

.pledge-forms {
    position: static;
}

.pledge-forms iframe {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100%;

    display: block;
    visibility: hidden;
}

.pledge-forms label.hide-form {
    position: fixed;
    font-size: 5em;
}

.pledge-forms input[type=radio]:checked + iframe {
    position: fixed;
    visibility: visible;
}

.pledge-buttons {
    padding: 2px;
    flex-wrap: wrap;

    width: 100%;
    box-sizing: border-box;
    margin: 0;
}

.pledge-buttons label {
    width: 40%;
    margin: 5px 5px;
}

section.signup:before {
    margin: 0;
}

.details {
    padding: 0 1em;
}

body {
    width: 100%;
    font-size: 3vw;
}

.pledge-forms {
    position: static;
}

.pledge-forms [type=radio]:checked + iframe  {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100%;

    display: block;
    visibility: hidden;
}

.pledge-forms label.hide-form {
    position: fixed;
    font-size: 5em;
}

.pledge-forms input[type=radio]:checked + iframe {
    position: fixed;
    visibility: visible;
}

.pledge-buttons {
    padding: 2px;
    flex-wrap: wrap;

    width: 100%;
    box-sizing: border-box;
    margin: 0;
}

.pledge-buttons label {
    width: 40%;
    margin: 5px 5px;
}

section.signup:before {
    margin: 0;
}

.details {
    padding: 0 1em;
}

Make sure pledges don't pop up by default on safari
Make sure pledges don't pop up by default on safari
