html {
    height:100%;
    box-sizing: border-box;
}

* {
    box-sizing: inherit;
}

body {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
    display: grid;
    grid-template-rows: auto 1fr auto;
}

header {
    background-color: rgb(40,53,131);
    color: white;
    margin-bottom: 20px;
}

main, footer {
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

.stamp {
    position: absolute;
    font-size: 60px;
    transform: rotate(-20deg);
    display: inline-block;
    padding: .2em .5em;
    border-radius: 10px;
}

.success.stamp {
    top: 110px;
    left: 220px;
    color: #0f5132;
    background-color: #d1e7dd;
    border: 3px solid #859a99;
}

.hidden {
    display: none;
}


h2 {
    margin-top: 0;
}

header h1 {
    text-align: center;
}

a {
    color: rgb(40,53,131);
}

.img-holder {
    position: relative;
    top: 0;
    left: 0;
}

.img-holder .zone {
    position: absolute;
    display: block;
    background-image: url("../images/gouttes.png");
    background-size: contain;
    background-repeat: repeat;
    background-position: center;
    filter: invert(71%) sepia(80%) saturate(342%) hue-rotate(72deg) brightness(102%) contrast(100%);
}

.img-holder .zone.inactive,
.img-holder .zone.fade-out {
    opacity: 0;
}