@charset "UTF-8";

/* -------------------------
    root設定
------------------------- */
:root {
  /* font設定 */
  font-family: "Noto Sans JP", "ヒラギノ角ゴ Pro W3", "メイリオ", "Meiryo",
    sans-serif;
  color: #4c4c4c;
  font-size: clamp(12px, calc(14px + 0.2vw), 20px);
  line-height: 1.5em;
  letter-spacing: 0.06em;
  /* CSS変数宣言 */
  --main-color: #fff;
  --point-color: #242424;
  --accent-color: rgb(52, 67, 73);
}

/* -------------------------
    pタグ設定
------------------------- */
p {
  text-align: justify;
}

/* -------------------------
    共通 レイアウト設定
------------------------- */
.l-container {
  max-width: 1000px;
  width: calc(100% - 20px);
  padding-bottom: 100px;
  margin: 0 auto;
}

/* -------------------------
    header | ヘッダー
------------------------- */
header {
  display: flex;
  position: fixed;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(4px);
  width: 100vw;
  height: 60px;
  background: rgba(255, 255, 255, 0.7);
  border-bottom: solid 2px var(--point-color);
}

header .l-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: calc(100% - 40px);
  padding: 0;
}

#header__logo {
  display: inline-block;
  width: 100px;
  line-height: 100%;
}

/* -------------------------
    main | メイン
------------------------- */
main {
  margin-top: 60px;
}

/* -------------------------
    footer | フッター
------------------------- */
footer {
  background-color: var(--point-color);
  font-family: "Roboto", "Noto Sans JP", sans-serif;
  color: #fff;
  font-size: 14px;
  text-align: center;
  letter-spacing: 0.1em;
}

#footer__img {
  width: 100%;
  max-height: 500px;
  height: 70vh;
  background-image: url(../img/office.jpg);
  background-size: cover;
  background-position: center;
}

footer .l-container {
  display: flex;
  padding: 50px 0;
  flex-direction: column;
  align-items: center;
}

/* -------------------------
    h2 | 見出し2
------------------------- */
.c-heading2 {
  padding: 100px 0 50px;
  color: var(--point-color);
  font-family: "Roboto", sans-serif;
  font-size: 40px;
  font-weight: bold;
  text-align: center;
  letter-spacing: 0.15em;
}

/* -------------------------
    BACK TO TOP | トップへ戻るボタン
------------------------- */
#back-to-top {
  position: fixed;
  bottom: 5%;
  right: 5%;
  pointer-events: none;
  opacity: 0;
  width: 50px;
  height: 50px;
  border: solid 1px #4c4c4c;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(4px);
  text-align: center;
  font-size: 12px;
  transition: all 400ms ease;
}

#back-to-top:hover {
  color: #a8a8a8;
  border: solid 1px #a8a8a8;
}