Ribbon (using linear-gradients)

by Konstantin Rouda

HTML

<div class="c-container"></div>

CSS

HTML {
  /*using system font-stack*/
  font-family: Mina, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  font-size: 115%; /*~18px*/
  font-size: calc(16px + (30 - 16) * (100vw - 300px) / (1300 - 300) );
  line-height: 1.5;
  box-sizing: border-box;
}

BODY {
  display: flex;
  justify-content: center;
  margin: 0;
  color: rgb(58, 61, 64);
  background-color: rgb(240, 240, 240);
}

*, *::before, *::after {
  box-sizing: inherit;
  color: inherit;
}


/*Actual Style*/
.c-container {
  --base-color: firebrick;
  width: 90%;
  min-height: 20vw;
  margin: 1rem auto 0;
/*   border: 1px solid; */
  background: 
    linear-gradient(-46deg, transparent 17.8%, var(--base-color) 18%, var(--base-color) 49.8%, transparent 50%),
    linear-gradient(46deg, transparent 17.8%, var(--base-color) 18%, var(--base-color) 49.8%, transparent 50%), 
    linear-gradient(-134deg, transparent 17.8%, var(--base-color) 18%, var(--base-color) 50.8%, transparent 51%), 
    linear-gradient(134deg, transparent 17.8%, var(--base-color) 18%, var(--base-color) 50.8%, transparent 51%);
}