index.css

:root {
  --theme: 216, 232, 251;
}

@font-face {
  font-family: Vividly;
  src: url(assets/Vividly-Regular.ttf);
}

body {
  background-color: rgb(var(--theme));
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.12'%3E%3Cpath d='M0 38.59l2.83-2.83 1.41 1.41L1.41 40H0v-1.41zM0 1.4l2.83 2.83 1.41-1.41L1.41 0H0v1.41zM38.59 40l-2.83-2.83 1.41-1.41L40 38.59V40h-1.41zM40 1.41l-2.83 2.83-1.41-1.41L38.59 0H40v1.41zM20 18.6l2.83-2.83 1.41 1.41L21.41 20l2.83 2.83-1.41 1.41L20 21.41l-2.83 2.83-1.41-1.41L18.59 20l-2.83-2.83 1.41-1.41L20 18.59z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");

  padding: 5vh 20px 30px 20px;
  font-family: 'Vividly', Arial, Helvetica, sans-serif;
  color: #444;
  overflow: hidden;
  transition: ease background 0.5s;
}

.header {
  position: relative;
  align-items: center;
  text-align : center;
  z-index: 100;
}

h1 {
  opacity: 90%;
  font-size: 3.5rem;
  margin-top: 20px;
  /* letter-spacing: 5px; */
  line-height:10px;
}

h2 {
  font-size: 1.8rem;
  opacity: 60%;
  margin-top: 20px;
}

h3 {
  font-size: 1.75rem;
  opacity: 60%;
  margin-top: 4vh;
}

.footer {
  position: absolute;
  bottom: 0;
  left: 0;
  font-size: 1.2rem;
}

/* Ipod layout */
.items {
  margin-top: 40px;
  justify-content: center;
  height: 100vh;
  display: flex;
  position: absolute;
  top: 32%;
  right: 0;
  left: 0;
  margin: 0 auto;
  transform: translateX(-5vw) rotate(30deg);
}

.ipod {
  width: 800px;
  min-width : 800px;
  position: relative;
}

.screen {
  position: absolute;
  top: 89px;
  left: 304px;
  width: 155px;
  height: 115px;
  overflow: hidden;
}

/* UI */

.menu {
  overflow: hidden;
  position: relative;
  height: 100px;
}
.arrow:after {
  content: ' ▸';
  position: absolute;
  right: 10px;
  opacity: 80%;
}

.play {
  overflow: hidden;
  position: relative;
  height: 100px;
}

.play-left {
  margin-left: 10px;
  height: 70px;
  overflow: hidden;
}
.play-right {
  margin-left: -45px;
  position: relative;
}
.play-artist {
  margin-top: 10px;
  line-height: 14px;
  font-size: 1rem;
}
.progress {
  height: 12px;
  margin-top: 5px;
  width: 132px;
  margin-left: 10px;
}
.progress-bar {
  background-color: rgb(var(--theme));
  filter: brightness(90%);
}
.cover {
  width: 70px;
  min-width: 70px;
  min-height: 70px;
  object-fit: cover;
}

p {
  color: #666;
  font-size: 1.1rem;
  margin-bottom: -5px;
  font-weight: 600;
  padding-left: 10px;
}

.menubar {
  text-align: center;
  margin-bottom: 1px;
  margin-left: -5px;
  margin-top: -5px;
  font-size: 1rem;
}

.selected {
  background: rgb(var(--theme));
  filter: brightness(95%);
  transition: ease background 0.5s;
}

/* social icons */
a {
  font-size: 1.5rem;
  margin: 5px;
  color: #444;
  opacity: 80%;
  transition: ease all 0.2s;
  line-height: 1px;
}
a:hover {
  color: rgb(var(--theme));
  filter: brightness(70%);
  transition: ease all 0.2s;
  text-decoration: none;
}
.separator {
  font-size: 2rem;
  color: #444;
  opacity: 40%;
}

/* The helper cat */
.help {
  position: absolute;
  bottom: 0;
  width: 100%;
  display: flex;
  justify-content: center;
}
.cat {
  margin-left: 300px;
  z-index: 100;
}
.cat-tooltip {
  position: absolute;
  bottom: 120px;
  margin-left: 300px;
  font-size: 1.5rem;
  z-index: 100;
  opacity: 80%;
  text-align: left;
  line-height: 18px;
  font-weight: 600;
  background: #fff;
  padding: 10px;
  border-radius: 20px;
}

/* control buttons */
.btn-left {
  position: absolute;
  /* background: red; */
  width: 50px;
  height: 50px;
  top: 270px;
  left: 304px;
}
.btn-right {
  position: absolute;
  /* background: red; */
  width: 50px;
  height: 50px;
  top: 270px;
  left: 415px;
}
.btn-center {
  position: absolute;
  /* background: green; */
  width: 50px;
  height: 50px;
  top: 270px;
  left: 360px;
}
.btn-up {
  position: absolute;
  /* background: blue; */
  width: 50px;
  height: 50px;
  top: 220px;
  left: 360px;
}
.btn-down {
  position: absolute;
  /* background: blue; */
  width: 50px;
  height: 50px;
  top: 320px;
  left: 360px;
}

/* 404 page */
.fourohfour {
  font-size: 10rem;
  margin-top: 100px;
  margin-bottom: 50px;
}

/* Responsive stuff */
@media only screen and (max-width: 768px) {
  /* For mobile phones: */
  body {
    position: fixed;
    height: 100%;
    width: 100%;
  }
  a {
    font-size: 1.3rem;
  }
  h2 {
    font-size: 1.3rem;
  }
  h1 {
    font-size: 2.2rem;
    line-height: 1px;
  }
  h3 {
    margin-top: 1vh;
    font-size: 1.3rem;
  }
  .items {
    position: absolute;
    top: 32%;
    right: 0;
    left: 0;
    margin: 0 auto;
    transform: translateX(-10%) rotate(30deg);
  }
  .cat-tooltip {
    right: 10%;
    max-width: 30%;
  }
  .footer {
    background: rgba(255,255,255,0.9);
    padding: 2px 10px;
    border-radius: 20px;
  }
}