* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: #242424;
  background: #fff;
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  line-height: 1.85;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.paper {
  min-height: 100vh;
  background-color: #f1ede3;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(110, 95, 70, .06) 0 1px, transparent 1.5px),
    radial-gradient(circle at 70% 45%, rgba(80, 70, 55, .045) 0 1px, transparent 1.4px),
    repeating-linear-gradient(9deg, rgba(255,255,255,.2) 0 1px, rgba(120,100,75,.018) 1px 3px, transparent 3px 8px);
  background-size: 17px 19px, 23px 29px, auto;
}

.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: .9rem;
}