:root {
    --text-color: #e84509;
    --back-color: #ddd;
}

main {
    z-index: 1;
}

a {
    text-decoration: none;
    color: #e84509;
}

h1 {
    font-family: "Noto Sans JP", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
}

linkimage:hover{
	opacity:0.5;
	transition:0.3s;
}

body {
    color: var(--text-color);
    background-color: var(--back-color);
    font-family: "Shippori Mincho B1", serif;
    font-weight: 400;
    font-optical-sizing: auto;
    font-style: normal;
    width: 100%;
    margin: 0 auto;
    min-height: 100vh;
    position: relative;
}

.noto-sans-jp-<Noto> {
  font-family: "Noto Sans JP", sans-serif;
  font-optical-sizing: auto;
  font-weight: 500;
  font-style: normal;
}

.shippori-mincho-b1-regular {
  font-family: "Shippori Mincho B1", serif;
  font-weight: 400;
  font-style: normal;
}

.honbun {
  width: 100%;
}

.logo {
  position: fixed;
  top: 0;
  padding: 3%;
}

.multi_column {
  display: grid;
  justify-content: left;
  margin-top: 0;
  grid-template-columns: 1fr 3.75fr; /* 左固定幅 + 右可変幅 */
}

.menu {
  position: fixed;
  top: 12%;
  min-height: 20%;
  margin-left: 3%;
  width: 25%;
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 200;
  line-height:40px;
  grid-column: 1;
}

.content {
  position: relative;
  margin-top: 10vh;
  width: 75%;
  text-align: left;
  line-height:30px;
  grid-column: 2;
}