* {
    box-sizing: border-box;
 }
 body {
    margin: 0;
    padding: 0;
    font-family: "Hiragino Kaku Gothic Pro", "ヒラギノ角ゴ Pro W3", メイリオ, Meiryo, "ＭＳ Ｐゴシック", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: #e6e6e6;
 }
 header {
    padding: 30px 4% 10px;
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #fff;
    display: flex;
    align-items: center;
 }
 h1 {
    margin: 0; padding: 0;
    font-size: 20px;
 }
 a {	
    text-decoration: none;
    color: #4b4b4b;
 }
 nav {
    margin: 0 0 0 auto;
 }
 ul {
    list-style: none;
    margin: 0;
    display: flex;
 }
 li {
    margin: 0 0 0 15px;
    font-size: 14px;
 }
 .main {
     text-align: center;
 }
 .main-text {
     background-color: #eaf4fc;
     margin: 0 auto;
     max-width: 800px;
     border-radius: 50px;
   }