@charset "UTF-8";
/* 引数 */
/* FontSize */
/* FontFamily */
/* Color for Light mode */
/* Color for Dark mode */
html {
  font-size: 62.5%;
}

/* font-size: 62.5% rem指定 1rem:10px相当, 2rem:20px相当 */
body, html, header, footer, section, article, aside, fieldset, div, form, p, address, h1, h2, h3, h4, h5, h6, dl, dt, dd, ul, ol, li {
  margin: 0px;
  padding: 0px;
  border: none;
  box-sizing: border-box;
  font-family: "ten-mincho-antique", "DNP 秀英四号かな Std M", A1 Mincho, Times New Roman, "游明朝", YuMincho, "ヒラギノ明朝 ProN W3", "Hiragino Mincho ProN", "HG明朝E", "メイリオ", Meiryo, serif;
  font-style: normal;
  letter-spacing: 0.1rem;
  flex-wrap: wrap;
}

li {
  list-style: none;
  list-style-position: inside;
  padding-inline-start: 8px;
}

img {
  vertical-align: bottom;
}

a, *:visited {
  text-decoration: none;
}

*:hover {
  text-decoration: none;
}

.clearfix:after {
  content: "";
  clear: both;
  display: block;
}

.auto_width {
  width: 100%;
  height: auto;
  max-height: 100%;
}

.auto_height {
  width: 100%;
  height: auto;
  max-width: 100%;
}

.auto_size {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
}

.flex {
  display: flex;
}

.center {
  text-align: center;
  vertical-align: middle;
}

em, strong, blockquote, del {
  font-size: 2.1rem;
  font-family: "DNP 秀英にじみ明朝 Std L", "ヒラギノ明朝 ProN W3", "Hiragino Mincho ProN", "HG明朝E", "メイリオ", Meiryo, serif;
}

header {
  width: 100vw;
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  z-index: 10;
}
header h1 {
  width: 75%;
  margin: 2rem auto;
  font-size: 3.6rem;
}

main {
  width: 100vw;
  height: 100vh;
  margin: 11rem 0 8rem 0;
  overflow-x: hidden;
  position: relative;
}
main section {
  width: 75vw;
  margin: 0 auto;
  font-size: 1.8rem;
}

footer {
  width: 100vw;
  height: 8rem;
  background-color: coral;
  position: fixed;
  bottom: 0;
  left: 0;
}
footer div {
  width: 75%;
  margin: 2rem auto;
  color: white;
  font-size: 2.1rem;
}

body {
  background-color: #0d0015;
  color: white;
}

.btn {
  display: inline-block;
  background: linear-gradient(to right, #00bfff 0%, #7fffd4 45%, #fffacd 100%);
  background-size: 200% auto;
  margin: 0.5rem 1rem;
  color: #fff;
  border-width: 1px;
  border-color: #00bfff;
  border-radius: 20px;
  padding: 5px 18px;
  text-decoration: none;
  font-size: 1.5rem;
  transition: 0.5s;
}

.btn:hover {
  color: #fff;
  background-position: right center;
}

input.form-input, textarea {
  max-width: 100%;
  border: none;
  margin: 1.5rem 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 0.3rem;
  background: rgb(223.5, 223.5, 223.5);
  color: rgb(121.5, 121.5, 121.5);
}
input.form-input::-moz-placeholder, textarea::-moz-placeholder {
  color: rgb(121.5, 121.5, 121.5);
}
input.form-input::placeholder, textarea::placeholder {
  color: rgb(121.5, 121.5, 121.5);
}
input.form-input.error, textarea.error {
  background: crimson;
  color: #fff;
}
input.form-input.error::-moz-placeholder, textarea.error::-moz-placeholder {
  color: black;
}
input.form-input.error::placeholder, textarea.error::placeholder {
  color: black;
}