* {
  box-sizing: border-box;
}

body {
  padding: 20px;
  max-width: 1024px;
  margin: auto;
}

h1 {
  text-align: center;
}

.main {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.container {
  flex-grow: 1;
  min-width: 300px;
  margin: 10px;
  max-width: 50%;
}

.column-section {
  column-count: 2;
  column-gap: 10px;
  margin: 0;
  border: 1px solid black;
  padding: 10px;
}

.outer {
  overflow: hidden;
}

.block1,
.block2,
.block3,
.block4,
.blockA,
.blockB,
.blockC,
.blockD {
  border: 1px solid black;
  width: 100%;
  margin-bottom: 10px;
  break-inside: avoid-column;
}

.block1,
.block2,
.block3,
.block4 {
  display: block;
}

.blockA,
.blockB,
.blockC,
.blockD {
  display: inline-block;
  vertical-align: top;
}

.block1,
.blockA {
  height: 119px;
  background-color: #d17b32;
}

.block2,
.blockB {
  height: 163px;
  background-color: #2c856f;
}

.block3,
.blockC {
  height: 156px;
  background-color: #4286df;
}

.block4,
.blockD {
  height: 112px;
  background-color: #838ac5;
}