<section class="tilt">
  <h1>Tilt</h1>
</section>
<section class="triangle">
  <h1>Triangle</h1>
</section>
<section class="polygon">
  <h1>Polygon</h1>
</section>
<section class="last">
  <h1>Section</h1>
</section>
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Height of the cut*/
  --cut: 100px;
}

body {
  min-height: 100vh;
  font-family: "Trebuchet MS", sans-serif;
}

section {
  background-color: #404040;
  min-height: 90vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

section h1 {
  font-size: 2.5rem;
  color: #404040;
  background-color: whitesmoke;
  padding: 0.5rem 1rem;
  border-radius: 1rem;
  text-align: center;
  text-transform: uppercase;
}

.tilt {
  background: linear-gradient(to right, #1d976c, #93f9b9);
  /* Clip the bottom part of this section*/
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - var(--cut)));
  /* Higher z-index value than next section */
  z-index: 3;
  position: relative;
}

.triangle {
  background: linear-gradient(to right, #ff8008, #ffc837);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--cut)),
    50% 100%,
    0 calc(100% - var(--cut))
  );
  /*Close the gap with the previous section*/
  margin-top: calc(var(--cut) * -1);
  /* Higher z-index value than next section */
  z-index: 2;
  position: relative;
}

.polygon {
  background: linear-gradient(to right, #ff00cc, #333399);
  clip-path: polygon(
    0 0,
    100% 0,
    100% 100%,
    80% calc(100% - var(--cut)),
    20% calc(100% - var(--cut)),
    0 100%
  );
  /*Close the gap with the previous section*/
  margin-top: calc(var(--cut) * -1);
  z-index: 1;
  position: relative;
}

.last {
  /*Close the gap with the previous section*/
  margin-top: calc(var(--cut) * -1);
}

@media screen and (max-width: 768px) {
  section h1 {
    font-size: 2rem;
  }
}

External CSS

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