body {
  background-image: url('./images/background.jpeg');
  background-repeat: no-repeat;
  background-size: cover;
  padding: 0;
  margin: 0;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

/** header */
.header {
  position: fixed;
  top: 0;
  width: 100vw;
  background-color: #011e4bde;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  padding: 0;
  z-index: 100;
}
.header .logo {
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.header .logo img {
  height: auto;
}
.header .entry {
  display: flex;
  align-items: center;
  justify-content: center;
}
.header .entry img {
  width: 100%;
  height: auto;
}

/** main */
.wrapper {
  display: flex;
  flex-direction: column;
  margin-top: 15vw;
}

.title img {
  width: 100%;
}

.ac-container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  z-index: 2;
}

.ac-container .ac {
  flex: 1;
  opacity: 0;
  transform: translateY(5vw);
  aspect-ratio: 1;
}
.ac-container .ac.ac-1 {
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.ac-container .ac.ac-2.show {
  transition: opacity 0.5s ease, transform 0.7s ease;
}
.ac-container .ac.ac-3.show {
  transition: opacity 0.5s ease, transform 1s ease;
}
.ac-container .ac.show {
  opacity: 1;
  transform: translateY(0);
}
.ac-container .ac.ac-1.show {
  transition-delay: 0.2s;
}
.ac-container .ac.ac-2.show {
  transition-delay: 0.5s;
}
.ac-container .ac.ac-3.show {
  transition-delay: 0.8s;
}
.ac-container .ac img {
  width: 100%;
}

.text img {
  width: 80%;
  margin: 3vw 10% 0;
}

.bt-container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  z-index: 2;
}
.pointer {
  cursor: pointer;
}
.bt img {
  width: 110%;
}

.slide-container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  gap: 2vw;
  z-index: 1;
}
.slide {
  position: relative;
  display: flex;
  justify-content: center;
  max-width: 100vw;
  /* overflow-x: hidden; */
}
.slide.slide-1 {
  max-width: 85vw;
  padding-left: 15vw;
}
.slide.slide-1 img {
  width: 100vw;
  height: 157vw;
  margin-top: -65vw;
  z-index: -1;
  object-fit: cover;
  transition: transform 0.4s ease;
  transform: scale(1);
}
.slide.slide-2 img,
.slide.slide-3 img {
  margin-left: 1vw;
  width: calc(100vw - 26vw);
}

.fade-on {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 1s ease-out, transform 0.6s ease-out;
  will-change: opacity, transform;
}
.fade-on.show {
  opacity: 1;
  transform: scale(1);
}

.bottom {
  width: 100vw;
  margin-top: 10vw;
}
.bottom img {
  width: 100%;
  height: auto;

  mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 100%);
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent 0%,
    black 10%,
    black 100%
  );
}

/** pc */
@media (min-width: 769px) {
  .header {
    height: 125px;
  }
  .header .logo {
    width: 170px;
    height: 84px;
    margin-left: 20vw;
  }
  .header .logo img {
    width: 80px;
  }
  .header .entry {
    width: 212px;
    height: 84px;
    margin-right: 20vw;
  }
  .wrapper {
    margin-left: 20vw;
    margin-right: 20vw;
  }
}

/** tablet */
@media (max-width: 768px) {
  .header {
    height: 54px;
  }
  .header .logo {
    width: 90px;
    height: 44px;
    margin-left: 15vw;
  }
  .header .logo img {
    width: 40px;
  }
  .header .entry {
    width: 121px;
    height: 50px;
    margin-right: 15vw;
  }
  .wrapper {
    margin-left: 15vw;
    margin-right: 15vw;
  }
}

/** mobile */
@media (max-width: 320px) {
  .header {
    height: 42px;
  }
}