@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400&display=swap');



html, body {
  --light-color: hsl(40deg, 1%, 98%);
  --base-color: hsl(40deg, 1%, 90%);
  --middle-color: hsl(40deg, 1%, 83%);
  --shadow-color: hsl(40deg, 1%, 70%);
  --dark-color: hsl(40deg, 1%, 35%);
  
  --smaller-padding: 10px;
  --small-padding: 15px;
  --base-padding: 20px;
  --big-padding: 30px;
  --biger-padding: 100px;
  
  --small-font: 13px;
  --base-font: 16px;
  --big-font: 25px;
  
}

* {
  margin: 0%;
  padding: 0%;
  box-sizing: border-box;
  scroll-behavior: smooth;
  text-decoration: none;
  border: none;
  background: none;
  font-family: "Noto Sans JP", sans-serif;
  font-size: var(--base-font);
  font-weight: normal;
  color: var(--dark-color);
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  background: var(--base-color);
  overflow-x: hidden;
  overflow-y: auto;
}

main {
  width: 100%;
  min-height: 100%;
}

article {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
}



div.hr {
  width: 100%;
  max-width: 680px;
  height: 6px;
  margin: var(--big-padding) auto;
  background: linear-gradient(to bottom, var(--middle-color) 50%, var(--light-color) 50%);
  filter: blur(1px);
  border-radius: 3px;
}



footer {
  width: 100%;
  padding-top: var(--biger-padding);
  padding-bottom: var(--big-padding);
  text-align: center;
}

footer > div.menu {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

footer > div.menu > a {
  padding: 0 var(--smaller-padding);
  margin-left: -1px;
  display: block;
  border-left: solid 1px var(--dark-color);
  border-right: solid 1px var(--dark-color);
  font-size: var(--small-font);
}
footer > div.menu > a:hover {
  text-decoration: underline;
}

footer > div.copyright {
  padding-top: var(--small-padding);
  font-size: var(--base-font);
}