@charset "utf-8";

*,
::after,
::before {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

ul,
ol {
    list-style: none;
}

a {
    color: inherit;
    text-decoration: none;
}

body {
    font-family: "Yu Mincho";
    font-size: 16px;
    color: #ffffff;
    line-height: 1;
    background-color: #0a052e;
}

img {
    max-width: 100%;
}

.image {
  transition: opacity 0.5s ease, filter 0.5s ease;
  filter: blur(0);
  opacity: 1;
}

.image.hidden {
  opacity: 0;
  filter: blur(5px);
}

.header-inner {
    max-width: 1700px;
    height: 180px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 40px;
    padding-right: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo {
    display: block;
    width: 180px;
}

.header {
    position: fixed; 
    top: 0;
    left: 0;
    width: 100%;
    z-index: 10; 
  }

.site-menu ul {
    display: flex;
    font-weight: bold;
    margin-top: 55px;
}

.site-menu ul li {
    margin-left: 20px;
    margin-right: 20px;
}

.site-menu ul li:hover {
  transform: scale(1.15);
}

.site-menu ul li {
  transition: transform 0.2s ease; /* ふわっと変化させる */
}

.footer {
    background-color: black;
    padding: 90px 40px 50px 40px;
}

.footer-flex {
    width: 70%;
    display: flex;
    justify-content: space-between;
    margin-left: auto;
    margin-right: auto;
    padding-left: 40px;
    padding-right: 40px;
    align-items: center;
}

.footer-text {
    line-height: 2;
} 

.footer-logo {
    display: block;
    width: 235px;
}

.insta-logo {
    width: 35px;
    margin-top: 50px;
}

.fade-up,
.fade-up-once {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.5s ease, transform 1.5s ease;
}

.dai.fade-up,
.syou.fade-up {
  transition-duration: 2.5s;
}

.fade-up.in-view,
.fade-up-once.in-view {
    opacity: 1;
    transform: translateY(0);
}

.stars {
    position: absolute;
    top: 0;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
  }
  
  .stars-left {
    left: 0;
    width: 300px;
    height: 100%;
  }
  
  .stars-right {
    right: 0;
    width: 300px;
    height: 100%;
  }
  
  .stars-center {
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
  }
  
  .star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    opacity: 0.7;
    animation: twinkle 2s infinite ease-in-out;
  }
  
  @keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
  }
  
  #star-area {
    position: relative;
    overflow: hidden;
  }

  .footer-flexbox {
    width: 70%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
  }

  .hamburger-menu {
    display: none;
    position: relative;
    z-index: 1000;
  }
  
  .hamburger-btn {
    width: 35px;
    height: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
  }
  .hamburger-btn span {
    display: block;
    height: 1.8px;              
    background-color: #ffffff;   
    border-radius: 3px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .hamburger-btn:hover span:nth-child(1) {
  transform: translateX(5px);
}
.hamburger-btn:hover span:nth-child(2) {
  transform: translateX(-5px);
}
  
  .hamburger-dropdown {
    position: absolute; 
  top: 200%;       
  right: 0;           
  background-color: #eceaf08b; 
    backdrop-filter: blur(6px);
  border-radius: 6px;
  /* border-radius: 3px;         */
  padding: 30px 20px;    
 visibility: hidden;   
  box-shadow: 0 4px 10px rgba(0,0,0,0.3); 
  z-index: 1000; 
    opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
  }

  .hamburger-dropdown.active {
visibility: visible;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
  
  .hamburger-dropdown ul {
    list-style: none;
    padding: 10px;
    margin: 0;
  }
  
  .hamburger-dropdown ul li {
    margin: 50px 0;
    font-size: 18px;
  }

  .hamburger-dropdown ul li:hover {
    /* text-decoration: underline; */
    transform: scale(1.1);
    transition: transform 0.2s ease; 
  }


  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px; 
    transition: padding 0.3s;
  }