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

body {
    background-color: darkred;
    text-align: center;
    font-size: 22px;
    max-width: 1200px;

    position: relative;
    margin: 0 auto;
    padding-top: 170px;
    perspective: 400px;
}
#panel {
    width: 100%;
    height: 100%;
    background-color: orange;
    position: absolute;
    z-index: 10;
    top:0px;
    left:0px;
    padding-top: 5%;
    /* align-content:center; */
    color: aliceblue;
    font-weight: bold;
    transition: all 1.7s cubic-bezier(0.075, 0.82, 0.165, 1);
    /* 3d stuff */
    transform-style: preserve-3d;
}
.slide-up{
    transform: translateY(-90%) /*rotateX(70deg)*/;
}
h2, h3 {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    margin-bottom: 30px;
}

#btn {

    background-color: chartreuse;
    padding: 10px 70px;
    border: none;
    border-radius: 10px;
    box-shadow: 12px 12px 20px #0000006c;
    margin-bottom: 200px;
    rotate: 12deg;
    font-size: 2em;
    cursor: pointer;
    transition: all 0.2s linear;

}
#btn:hover {
    background-color: blue;
    rotate: -3deg;
}