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

html,
body {
  height: 100%;
  width: 100%;
}
body {
  font-family: "Inter", serif, sans-serif;
}
main {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    120deg,
    #00337c 0%,
    /* Deep blue */ #1a6dff 50%,
    /* Medium blue */ #00337c 100% /* Deep blue */
  );
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding: 32px;
}

section {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 40px;
}
.key {
  background: linear-gradient(
    120deg,
    #00337c 0%,
    /* Deep blue */ #1a6dff 50%,
    /* Medium blue */ #00337c 100% /* Deep blue */
  );
  flex-shrink: 1;
  color: #e0e7ff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  min-width: 180px;
  padding: 20px;
  font-size: 24px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  margin: 20px;
}
.key small {
  position: absolute;
  top: -20px;
  left: 0;
  font-size: 14px;
  color: #e2e7ee;
  text-align: center;
  width: 100%;
}