html {
  font-size: 125%;
  margin-left: auto;
  margin-right: auto;
  max-width: 1280px;
}

body {
  line-height: 1.2;
  color: #222;
  background-color: #fff;
  font-family: serif;
  margin: 1em;
}

a, a:visited {
  color: #03a;
}

a:hover {
  color: #03a;
  background-color: #bce;
}

h1.title {
  background-color: #eee;
  border-style: solid none;
  border-width: 2px;
  border-color: #000;
}

.level1 h1 {
  background-color: #eee;
  border-style: solid none;
  border-width: 1px;
  border-color: #000;
}

.level2 h2 {
  border-style: none none solid none;
  border-width: 1px;
  border-color: #000;
}

.caution-sign {
  position: relative;
  background: #ffd633;
  color: black;
  text-align: center;
  overflow: hidden;
}

.caution-sign::before,
.caution-sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 20px;
  background: repeating-linear-gradient(135deg, black 0 18px, #ffd633 18px 36px);
}

.caution-sign::before { top: 0; }
.caution-sign::after { bottom: 0; }

.caution-label {
  font-family: sans-serif;
  font-weight: 900;
  letter-spacing: .15em;
  text-transform: uppercase;
  font-size: 150%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#schedule th {
  text-align: left;
  border-style: none none solid none;
  border-width: 1px;
  border-color: #000;
  background-color: #fff;
}

#schedule tr:nth-child(odd) {
  background-color: #eee;
}