* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 62.5%; /* 1rem = 10px */
}

body {
  font-size: 1.6rem; /* 16px */
  font-family: "Noto Sans JP", sans-serif;
  background: #ffffff;
  color: #333333;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(180deg, #4d4a0f 0%, #b2ac23 100%);
  z-index: -1;
}

body::after {
  content: "";
  position: fixed;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(180deg, #0a4d36 0%, #009b69 100%);
  z-index: -1;
}

img {
  max-width: 375px;
  height: auto;
  display: block;
}

button {
  cursor: pointer;
  border: none;
  outline: none;
}

.container {
  max-width: 375px;
  margin: 0 auto;
  overflow-x: hidden;
  position: relative;
}

p {
  margin: 0;
  padding: 0;
}

a {
  color: inherit;
  text-decoration: none;
}