* {
  box-sizing: border-box;
}

body {
  min-height: 100svh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f5f5f5;
}

/* SCALE WRAPPER */
.ds-scale {
  transform: scale(1);
}

/* DS IMAGE */
.ds-shell {
  position: relative;
  width: 480px;
  height: 620px;
  background: url("ds.png") no-repeat center;
  background-size: contain;
}

/* SCREENS */
.screen {
  position: absolute;
  background: white;
  overflow-y: auto;
  font-family: sans-serif;
  padding: 8px;
}

/* MATCH IMAGE HOLES */
.top-screen {
  top: 72px;
  left: 86px;
  width: 308px;
  height: 170px;
}

.bottom-screen {
  top: 330px;
  left: 98px;
  width: 285px;
  height: 170px;
}

/* PAGE SYSTEM */
.page {
  display: none;
}

.page.active {
  display: block;
}

/* INVISIBLE BUTTON HIT ZONES */
.btn {
  position: absolute;
  background: transparent;
  border: none;
  cursor: pointer;
}

/* D-PAD */
.btn.up {
  left: 80px;
  top: 390px;
  width: 50px;
  height: 40px;
}

.btn.down {
  left: 80px;
  top: 440px;
  width: 50px;
  height: 40px;
}

/* A / B */
.btn.a {
  right: 80px;
  top: 390px;
  width: 45px;
  height: 45px;
  border-radius: 50%;
}

.btn.b {
  right: 120px;
  top: 430px;
  width: 45px;
  height: 45px;
  border-radius: 50%;
}