body {
  color: #fff;
  font-family: 'Benton Sans','Avenir','Helvetica Neue','Helvetica','Arial','Hiragino Sans','ヒラギノ角ゴシック',YuGothic,'Yu Gothic','メイリオ', Meiryo,'ＭＳ Ｐゴシック','MS PGothic',sans-serif;
  -webkit-appearance: none;
}

#video-background, #image-background, #video-overlay {
  position: fixed;
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
}

#video-background, #image-background {
  z-index: -3;
}

#image-background {
  background-image: url("/image/confirm.jpg") no-repeat left top;
}

#video-overlay {
  z-index: -2;
}

HTML CSSResult EDIT ON body {
  background: #000;
}

.pattern {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  background: linear-gradient(-45deg, rgba(4, 114, 124, 0.4), rgba(17, 66, 99, 0.6));
}

.pattern-form {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  background: rgba(0, 0, 0, 0.9);
}

h1 {
  font-size: 400%;
  font-weight: 800;
  -webkit-appearance: none;
}

h2 {
  font-size: 350%;
  margin-top: 100px;
  margin-bottom: 5px;
  -webkit-appearance: none;
}

h3 {
  font-size: 200%;
  -webkit-appearance: none;
}

p {
  font-size: 200%;
  margin-block-start: 0.3em;
  margin-block-end: 0.3em;
  -webkit-appearance: none;
}

p.songTitle {
  font-size: 150%;
  margin-bottom: 5px;
}

@media screen and (max-width:572px) {
  p.bio {
    font-size: 120%;
  }
}

ul {
  list-style-type: none;
  padding-inline-start: 0px;
  font-size: 200%;
}

.current-page {
  text-decoration: underline
}

.main {
  margin: 50px;
  position: relative;
  z-index: 3;
}

@media screen and (max-width:572px) {
  .main {
    margin: 20px;
  }
}

.fa-twitter {
  color: #fff;
}

.fa-twitter:hover {
  color: #55acee;
}

.fa-instagram {
  color: #fff;
}

.fa-instagram:hover {
  color: #780099;
}

.fa-youtube {
  color: #fff;
}

.fa-youtube:hover {
  color: #cd201f;
}

.fa-store-alt {
  color: #fff;
}

.fa-store-alt:hover {
  color: #6cc655;
}

a:link, a:visited, a:active {
  color: #fff;
  text-decoration: none;
}

a:hover {
  color: #00ff00;
  text-decoration: none;
}

.youtube {
  position: relative;
  width: 100%;
  max-width: 560px;
}

.youtube::before {
  content: "";
  display: block;
  width: 100%;
  padding-top: 56.25%;
  margin-bottom: 60px;
}

.youtube iframe {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
}

/* form */

#formWrap {
  width: 700px;
}

#formWrap p {
  font-size: 120%;
}

table.formTable {
  width: 100%;
  margin: 0 auto;
  border-spacing: 0px 20px;
}

table.formTable td, table.formTable th {
  border: 1px solid #efefef;
  padding: 10px;
}

table.formTable th {
  width: 30%;
  font-weight: normal;
  text-align: left;
}

@media screen and (max-width:572px) {
  #formWrap {
    width: 95%;
    margin: 0 auto;
  }
}

table.formTable th, table.formTable td {
  width: auto;
  display: block;
}

table.formTable th {
  margin-top: 5px;
  border-bottom: 0;
}

/* input field */

.box {
  margin-bottom: 10px;
}

input[type='text'] {
  font-family: 'Benton Sans','Avenir','Helvetica Neue','Helvetica','Arial','Hiragino Sans','ヒラギノ角ゴシック',YuGothic,'Yu Gothic','メイリオ', Meiryo,'ＭＳ Ｐゴシック','MS PGothic',sans-serif;
  width: 100%;
  max-width: 400px;
  padding: 5px;
  border-radius: 5px;
  border: 1px solid #ccc;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

textarea {
  font-family: 'Benton Sans','Avenir','Helvetica Neue','Helvetica','Arial','Hiragino Sans','ヒラギノ角ゴシック',YuGothic,'Yu Gothic','メイリオ', Meiryo,'ＭＳ Ｐゴシック','MS PGothic',sans-serif;
  font-size: 120%;
  width: 100%;
  height: 300px;
  padding: 5px;
  border-radius: 5px;
  border: 1px solid #ccc;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

select {
  font-family: 'Benton Sans','Avenir','Helvetica Neue','Helvetica','Arial','Hiragino Sans','ヒラギノ角ゴシック',YuGothic,'Yu Gothic','メイリオ', Meiryo,'ＭＳ Ｐゴシック','MS PGothic',sans-serif;
}

.select-wrap {
  font-family: 'Benton Sans','Avenir','Helvetica Neue','Helvetica','Arial','Hiragino Sans','ヒラギノ角ゴシック',YuGothic,'Yu Gothic','メイリオ', Meiryo,'ＭＳ Ｐゴシック','MS PGothic',sans-serif;
  position: relative;
  width: 100%;
  max-width: 250px;
}

.select-wrap:before {
  position: absolute;
  right: 15px;
  top: 55%;
  transform: translateY(-50%) translateX(0);
  content: '';
  width: 15px;
  height: 15px;
  background: url(/image/angle_bottom.png) no-repeat;
  background-size: contain;
}

.select-wrap select {
  width: 100%;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  height: 35px;
  padding-left: 15px;
  border: 1px solid #ccc;
  background-color: #fff;
  border-radius: 5px;
}

.select-wrap select::-ms-expand {
  display: none;
}

.square_btn_confirm {
  position: relative;
  width: 160px;
  padding: 0.8em;
  margin-right: 1.0em;
  margin-bottom: 1.0em;
  text-align: center;
  text-decoration: none;
  color: #fff;
  background: #28a745;
  border-style: none;
  border-radius: 5px;
}

.square_btn_confirm:hover {
  opacity: 0.8;
  cursor: pointer;
  text-decoration: none;
}

.square_btn_reset {
  position: relative;
  width: 160px;
  padding: 0.8em;
  margin-right: 1.0em;
  margin-bottom: 1.0em;
  text-align: center;
  text-decoration: none;
  color: #fff;
  background: #6c757d;
  border-style: none;
  border-radius: 5px;
}

.square_btn_reset:hover {
  opacity: 0.8;
  cursor: pointer;
  text-decoration: none;
}

@media screen and (max-width:572px) {
  .square_btn_confirm, .square_btn_reset {
    width: 130px;
    margin-right: 0;
    -webkit-appearance: none;
  }
}