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

html {
  color-scheme: light dark;
  font-size: clamp(1rem, 0.861rem + 0.696vw, 1.2rem);
}

#root {
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

.block {
  overflow-y: scroll;
}

.block-x,
.block-y {
  align-items: center;
  display: flex;
  justify-content: center;
  overflow-y: hidden;
}

header,
main,
footer {
  display: flex;
  flex-direction: row;
}

button {
  padding: 1em 3em;
}

.block-1,
.block-7 {
  background: blue;
}

.block-2,
.block-4 {
  background: orange;
}

.block-3,
.block-6 {
  background: green;
}

header,
footer {
  height: 15%;
}

main {
  height: 70%;
}

.block-x,
.left {
  width: 20%;
}

.center {
  width: 55%;
}

.block-y,
.right {
  width: 25%;
}

.block-1 {
  width: 80%;
}

.block-7 {
  width: 75%;
}

.block-2 {
  height: 100%;
}

.block-3,
.block-6 {
  height: 30%;
}

.block-4,
.block-5 {
  height: 70%;
}