@charset "utf-8";
/* CSS Document */


/* svg */


/* モーダル */


/* テキストに背景アニメーション */


/* 画像のスクロール＆フェード */
.img-container {
    position: relative;
    overflow: hidden;
    width: 100%;
    max-width: 600px;
    height: auto;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }
  
  .img-container.show {
    opacity: 1;
    transform: translateX(0);
  }
  
  .img-container img {
    display: block;
    width: 100%;
    height: auto;
  }
  
  /* マスク（単色） */
  .img-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000066;
    z-index: 2;
    animation: none;
  }
  
  .img-container.show .img-mask {
    animation: mask-slide 0.4s ease-out 0.8s forwards;
  }
  
  @keyframes mask-slide {
    0% { left: 0%; }
    100% { left: 100%; }
  }
  



/* ドロップダウンメニュー */
.dropdown {
    position: relative;
}

.submenu {
    visibility: hidden;
    opacity: 0;
    
    position: absolute;
    top: calc(100% + 10px);
    left: 10px;
    
    list-style: none;
    
    padding: 15px 20px;
    background: #fff;
    border: 1px solid var(--border);
    
    transition: 0.2s ease all;
}

.dropdown:hover .submenu,
.dropdown:focus-within .submenu {
    visibility: visible;
    opacity: 1;
}

.submenu li {
    white-space: nowrap;
}

.hamburger {
    display: none;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    cursor: pointer;

    height: 70px;
    width: 70px;
    margin-left: auto;
    position: relative;
    z-index: 10;
    border: none;
    background-color: transparent;
}
.hamburger.menu-open .hamburger__line {
    background-color: transparent;
}
.hamburger.menu-open .hamburger__line::before {
    top: 0;
    transform: rotate(45deg);
}
.hamburger.menu-open .hamburger__line::after {
    top: 0;
    transform: rotate(-45deg);
}

.hamburger__line {
    display: block;
    height: 2px;
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    width: 34px;
    background-color: #172e59;
    transition: 0.4s;
}
.hamburger__line:before,
.hamburger__line:after {
    content: "";
    display: block;
    height: 100%;
    position: absolute;
    width: 100%;
    background-color: #172e59;
    transition: inherit;
}
.hamburger__line:before {
    top: -8px;
}
.hamburger__line:after {
    top: 8px;
}
.hamburger__text {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;

    text-align: center;
    color: #172e59;
    font-size: 1.2rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    
    transition: 0.3s;
}

@media screen and (max-width: 840px) {
    .hamburger {
        display: block;
    }
    
    .header_nav {
        position: fixed;
        top: 110px;
        right: -100%;
        z-index: 11;
        height: calc(100vh - 110px);
        width: 100vw;

        overflow-y: scroll;
        -webkit-overflow-scrolling: touch;

        visibility: hidden;
        opacity: 0;
        background-color: #fff;
        transition: 0.4s;
    }
    
    .header_nav.menu-open {
        right: 0;
        opacity: 1;
        visibility: visible;
    }
    
    .header_nav > ul {
        flex-direction: column;
        padding: 40px;
    }
    
    .header_nav > ul > li > a {
        display: block;
        padding: 10px 0;
    }
    
    .submenu {
        visibility: visible;
        opacity: 1;
        position: static;
        border: 0;
        padding: 0;
    }
    
    .submenu a {
        display: block;
        padding: 10px 0;
    }
    
    .header_nav_close {
        background: #f1f1f1;
        padding: 10px;
        text-align: center;
    }
    
}


/* ページトップ */
#button_top {
    opacity: 0;
    
    width: 50px;
    height: 50px;
    border-radius: 5px;
    background: rgba(0,0,0,0.7);
    
    position: fixed;
    right: 50px;
    bottom: 100px;
    
    border: none;
    cursor: pointer;
    transition: 0.3s;

    z-index: 5;
}
#button_top svg {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    margin: auto;
    transform: translateY(-50%) rotate(-90deg);
}
#button_top:hover {
    opacity: 0.7;
}