body {
  font-family: sans-serif;
  margin: 0;
  background: black;
}

header {
  text-align: center;
  background: #111;
  color: white;
  padding: 0px;
  margin: 0;
  position: relative;
}
a{
    color:skyblue;
    font-weight:bold;
    text-decoration: none;
}
p{
    color:skyblue;
    font-weight:bold;
    text-decoration: none;
}
th{
  text-align:left;
}
.title{
  font-size:32px;
  background:rgb(0,0,255);
  color:white;
  font-weight:bold;
  margin:0;
}
.subTitle{
  font-size:18px;
  background:rgb(0,0,150);
  color:white;
  font-weight:bold;
  margin:0;
}

.ichiran{
  margin: 10px;
  font-size:24px;
}
.inkai{
  margin: 10px;
  font-size:18px;
}
.inkai-url{
  margin: 10px;
  font-size:18px;
  text-decoration: none;
}
.inkai-url:hover{
  background: rgb(120,150,150)
}
.slider {
  width: 100%;
  height: 300px;
  overflow: hidden;
  position: relative;
}

.sliderImg {
  width: 100%;
  height: 300px;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.sliderImg.active {
  opacity: 1;
}

main {
  padding: 20px;
}
@media screen and (max-width: 768px) {
  .slider {
    height: 200px;
  }

  .sliderImg {
    height: 200px;
  }

  header h1 {
    font-size: 1.5em;
  }

  header p {
    font-size: 1em;
  }

  main h2 {
    font-size: 1.3em;
  }

  main ul {
    padding-left: 20px;
    font-size: 1em;
  }
}