@charset "utf-8";

/* ==========================
共通
===========================*/
html{
    font-size: 62.5%;
    margin: 0;
    padding:0;
}

img{
    max-width: 100%;
    height: auto;
}

body{
    font-family: 'Zen Old Mincho', 'sans-serif';
    font-style: normal;
    color: var(--color-black);
    line-height: 1;
}

:root{
    --color-black: #323231;
    --color-white: #fff;
    --color-gray: #575757;
    --color-graylight: #6D6D6D;
}

.section__subtitle{
    color: var(--color-graylight);
    font-size: 1.1rem;
    margin-bottom: 8px;
}

h3{
    font-family: 'EB Garamond' ,'sans-serif';
    font-size: 3.2rem;
    margin-bottom: 42px;
}

@media screen and (min-width: 1025px){
    .section__subtitle{
        font-size: 1.7rem;
    }

    h3{
        font-size: 5.6rem;
        margin-bottom: 98px;
    }
}

/* --- 背景動画の固定設定 --- */
#video-aria {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

#video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(5px);
    transform: scale(1.1);
}

.poster{
   filter: blur(5px); 
}

/* --- ヘッダーとナビゲーション--- */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    z-index: 100;
}

.header__title a {
    font-size: 1.9rem;
    font-family: 'EB Garamond' ,'sans-serif';
}

/* ハンバーガーボタン */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-gray);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s;
}

.nav.active {
    opacity: 1;
    visibility: visible;
}

.openBtn {
    position: relative;
    z-index: 1000;
    cursor: pointer;
    width: 40px;
    height: 35px;
    background: var(--color-black);
    border-radius: 2px;
    transition: 0.3s;
}

.openBtn.active {
    background: transparent; 
}

.openBtn span {
    display: block;
    position: absolute;
    width: 25px;
    height: 1px;
    background: var(--color-white);
    transition: all 0.4s;
    left: 8px;
}

.openBtn span:nth-child(1) { top: 14px; }
.openBtn span:nth-child(2) { top: 22px; }
.openBtn.active span:nth-child(1) {
    top: 20px;
    transform: rotate(45deg);
}

.openBtn.active span:nth-child(2) {
    top: 20px;
    transform: rotate(-45deg);
}

.nav__title{
    color: var(--color-white);
    font-size: 1.9rem;
    font-family: 'EB Garamond' ,'sans-serif';
    padding: 5.3%;
}

.nav__list{
    margin-top: 145px;
}

.nav__item{
    font-family: 'EB Garamond' ,'sans-serif';
    font-size: 2rem;
    color: var(--color-white);
    margin-bottom: 80px;
    padding: 0 5.3% 0;
}

.nav__item:hover {
  animation: text-blur 0.8s;
}

/* アニメーション設定 */
@keyframes text-blur {
  0% {
    filter: blur(0);
  }
  50% {
    filter: blur(2px); /* ぼかしの強さ */
  }
  100% {
    filter: blur(0);
  }
}

@media screen and (min-width: 769px) {
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 5.3%;
  }

  .openBtn {
    display: none;
  }

.nav {
    display: block !important;
    position: static;
    width: auto;
    height: auto;
    background: none;
    z-index: 9999;
    opacity: 1 ;        
    visibility: visible;
}

  .nav__list ul {
    display: flex;
    gap: 5.55vw;
  }

  .nav__list {
    margin-top: 0;
  }

  .nav__item {
    margin-bottom: 0;
    padding: 0;
  }

  .header__title a{
    font-size: 2.5rem;
  }

  .nav__item a {
    color: var(--color-black);
    font-size: 1.8rem;
  }

  .nav__title{
    display: none;
  }
}

@media screen and (min-width: 1025px){
      .header__title a{
            font-size: 3.2rem;
        }
}

/* フッター */
.footer {
    position: relative;
    z-index: 10;        
    background-color: var(--color-black); 
    color: var(--color-white);
    padding: 48px 5.3% 8px;
}

.footer__msg{
    font-size: 1.3rem;
    margin-bottom: 32px;
}

.footer__logo{
    font-family: 'EB Garamond' ,'sans-serif';
    font-size: 5.4rem;
    margin-bottom: 50px;
}

.footer__item{
    font-family: 'EB Garamond' ,'sans-serif';
    font-size: 1.5rem;
    margin-bottom: 27px;
}

.footer__item:last-of-type{
    margin-bottom: 58px;
}

.copyright{
    font-family: 'EB Garamond' ,'sans-serif';
    font-size: 1.1rem;
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 30px;
  width: 50px;
  height: 50px;
  z-index: 100;
  transition: opacity 0.3s;
}

.back-to-top:hover {
  opacity: 1;
}

.arrow {
  display: block;
  width: 26px;
  height: 26px;
  border-top: 2px solid var(--color-white);
  border-left: 2px solid var(--color-white);
  transform: rotate(45deg);
  margin: 15px auto 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.footer__item:hover {
  animation: text-blur 0.8s;
}

/* フッター　769px */
@media screen and (min-width: 769px){
    .footer {
        padding: 94px 8.19% 14px;
    }

    .footer__inner{
        display: flex;
        justify-content: space-between;
    }

    .footer__msg{
        font-size: 1.4rem;
    }

    .footer__logo{
        font-size: 8rem;
        margin-bottom: 180px;
    }

    .footer__item a{
        font-size: 1.8rem;
    }

    .arrow {
        width: 32px;
        height: 32px;
    }
}

/* フッター　1025px */
@media screen and (min-width: 1025px){
    .footer__msg{
        font-size: 1.6rem;
    }

    .footer__logo{
        font-size: 10rem;
        margin-bottom: 228px;
    }

    .footer__item a{
        font-size: 2.4rem;
    }

    .copyright{
        font-size: 1.4rem;
    }

    .arrow {
        width: 42px;
        height: 42px;
    }
}