nav ul {
  text-align: left;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  padding: 0;
  list-style: none;
  display: flex;
}

nav a {
  color: #fff;
  background-color: #000;
  border-bottom: 2px solid rgba(0, 0, 0, 0);
  border-radius: 5px;
  padding: 5px 10px;
  font-size: 1.2rem;
  font-weight: bold;
  text-decoration: none;
  transition: border-color .2s;
  display: inline-block;
}

nav a:hover {
  background-color: #666;
}

h1, p, ul {
  margin-bottom: 2rem;
}

main {
  font-size: .9rem;
}

details[open] summary {
  display: none;
}

main li {
  margin-bottom: .25rem;
  line-height: 1.3;
  list-style: none;
}

h3 {
  border-radius: 3px;
  margin-bottom: .3rem;
  font-weight: 600;
  display: inline-block;
}

main article {
  border-left: 3px solid #ddd;
  border-left-color: var(--color);
  margin: .25rem 0;
  padding: 0 .5rem;
}

.cal-link {
  color: #777;
  padding: 4px 6px;
  text-decoration: none;
  display: inline;
  position: absolute;
  top: -6px;
  right: -18px;
}

@media (max-width: 800px) {
  .cal-link {
    top: -4px;
    right: 0;
  }
}

.cal-link img {
  opacity: .2;
  width: 25px;
  transition: opacity .5s;
}

@media (max-width: 800px) {
  .cal-link img {
    opacity: 1;
  }
}

.event:hover :is(.cal-link img) {
  opacity: 1;
}

.event {
  display: flex;
  position: relative;
}

.event > div {
  width: calc(100% - 10px);
}

@media (max-width: 800px) {
  .event {
    line-height: 1.6em;
  }

  .event > div {
    width: calc(100% - 30px);
  }
}