@charset "UTF-8";

html {
overflow: auto;
}

body {
overflow: hidden;
margin: 0;
padding: 0;
color: black;
font-family: "sans-serif";
background: #f5f4f2;
}

#page {
max-width: 1220px;
margin: 0 auto;
background: #ffffff;
}

header {
overflow: hidden;
margin:0;
padding:0;
background-color:white;
}

#title-box {
max-width: 1000px;
margin: 24px auto;
}

header img {
max-width: 100%;
}

header h1{
margin:0;
font-size: 48px;
}

header i {
font-size:16px;
font-style:normal;
display:block;
color:gray;
padding:8px 0 8px 20px;
}

nav {
background: #252525;
}

nav ul {
display:grid;
margin: 0;
padding:0;
list-style:none;
grid-template-columns: 1fr 1fr 1fr 1fr;
font-size: 16px;
text-align:center;
}

nav a {
text-decoration:none;
display: block;
padding:32px 0;
color:white;
font-weight:bold;
}

#content {
margin: 24px 128px;
display: flex;
}

main {
width: 70%;
margin-right: 40px;
}

main h1 {
font-size: 24px;
}

main h2 {
margin-top: 32px;
}

main img {
width: 360px;
max-width: 100%;
margin: 24px 0;
}

main p {
line-height: 1.8;
}

main ul li {
line-height: 1.8;
}

main ul li a {
color: #3872b8;
}

main pre {
background-color: #dcdddd;
padding: 8px;
}

.highlight {
  background-color: #ec6d71;
  padding: 0 3px;
}

.list-group {
list-style-type: none;
counter-reset: count 0;
margin-bottom: 32px;
padding-left: 0;
padding-bottom: 32px;
border-bottom: 1px solid whitesmoke;
}

.list-group li {
margin: 8px 0;
}

.list-group li a {
color: #3872b8;
}

.list-group li:before {
content: counter(count) "日目. ";
counter-increment: count 1;
}

.list-group.step li:before {
content: "ステップ"counter(count) ". ";
counter-increment: count 1;
}

.list-group.case li:before {
content: "ケース"counter(count) ". ";
counter-increment: count 1;
}

.list-group.start {
  counter-reset: count -1;
}

main nav {
background: transparent;
font-size: 15px; 
}

main nav ul {
grid-template-columns: 1fr 1fr 1fr;
}

main nav ul li a{
text-decoration: underline;
color: #3872b8;
padding: 8px 0;
}

main nav li:nth-child(1) {
  justify-self: start;
  text-align: left;
}

main nav li:nth-child(2) {
  justify-self: center;
}

main nav li:nth-child(3) {
  justify-self: end;
  text-align: right;
}

#notice tr {
border-bottom: 1px solid silver
}

#notice th {
text-align: right;
}

aside {
width: 30%;
}

aside a {
color: #3872b8;
}

aside img {
max-width: 100%;
margin: 10px;
float: left;
margin-top: 0;
}

aside p {
font-size: 11px;
}

#link-title {
font-size: 15px;
}

footer {
margin:0;
padding: 32px 0;
background-color:#252525;
}

#footer-layout {
max-width: 936px;
margin: 0 auto;
}

footer ul {
display:grid;
margin:0;
padding:0;
list-style:none;
width:900px;
grid-template-columns: auto auto auto auto auto auto;
font-size: 16px;
gap: 32px;
}

footer li a {
color:white;
}

footer p {
color:white;
text-align:center;
}

@media (max-width: 770px) {
  #title-box {
    margin: 24px 16px;
  }
  #content {
    margin: 24px 24px;
    flex-direction: column;
  }
  main {
    width: 100%;
    max-width: 100%;
    margin-right: 0;
  }
  main h1,main h2 {
    font-size: 20px;
  }
  main h3 {
    font-size: 16px;
  }
  main p {
    font-size: 15px;
  }
  .list-group li {
    line-height: 1.8;
  }
  .list-group.step li:before {
    content: counter(count) ". ";
    counter-increment: count 1;
  }
  .list-group.case li:before {
    content: counter(count) ". ";
    counter-increment: count 1;
  }
  main nav ul li a {
    font-size: 15px; 
  }
  main pre {
    font-size: 9px;
    padding: 4px;
  }
  main table {
  font-size: 9px;
  }
  aside {
    margin-top: 32px;
    width: 100%;
    max-width: 100%;
  }
}

@media print {

}