body,
html {
  margin: 0;
  padding: 0;
  max-width: 100vw;
  max-height: 100vh;
}
#main {
  position: absolute;
  display: inline-block;
}

#resize::-webkit-resizer {
  background-color: transparent;
}

#resize {
  width: 45vw;
  height: 200px;
  resize: both;
  overflow: hidden;
  position: relative;
  background-color: transparent;
  z-index: 1;
}

#resize::after {
  content: "";
  position: absolute;
  bottom: -2px;
  right: -2px;
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: red;
  user-select: none;
}

#content {
  box-sizing: border-box;
  width: 300px;
  height: 380px;
  background-color: orange;
  padding: 30px;
  font-family: "marker felt", "comic sans ms", sans-serif;
  font-size: 24px;
  position: absolute;
  bottom: -365px;
  right: -285px;
  border-radius: 10px;
  box-shadow: 5px 15px 30px rgba(0, 0, 0, 0.5);
}