body {
    margin:0;
    font-family:"Noto Serif JP", serif;
    /*background: linear-gradient(180deg,#e6f4fb 0%,#b9e3f9 60%,#7ec8e3 100%);*/
    background: linear-gradient(45deg,
        #f0ffff, 
        #e0ffff,
        #fff8dc, 
        #e0ffff,
        #f0ffff);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color:#011f27;
    overflow-x: hidden;
    padding-top: 60px;
}

    @keyframes gradientShift {
      0% {
        background-position: 0% 50%;
      }
      50% {
        background-position: 100% 50%;
      }
      100% {
        background-position: 0% 50%;
      }
    }

h1{
    text-align:center;
}
a{
    text-decoration: none;
    color: #011f27;
}

.breadcrumb {
    max-width:900px;
    margin:30px auto 10px;
    font-size:12px;
    color: rgba(0,0,0,0.4);
    letter-spacing:0.05em;
}

.breadcrumb a {
    text-decoration:none;
    color:#011f27;
}

.breadcrumb span {
    margin:0 6px;
}

@media (max-width: 768px) {
.breadcrumb {
padding-left: 10px;
}
}

/* ===== ヘッダー ===== */
.header {
    position: fixed;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    width: 100%;
}

.header-inner {
    max-width:1200px;
    margin:auto;
    padding:15px 20px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}

/* ロゴ */
.logo {
    font-size:14px;
    letter-spacing:0.2em;
}

/* ===== ナビ（PC） ===== */
.nav {
    display: flex;
}

/* ナビ */
.nav a {
    margin-left:20px;
    text-decoration:none;
    color:#011f27;
    font-size:13px;
    transition:0.3s;
}

.nav a:hover {
    opacity:0.6;
}

/* ===== ハンバーガー ===== */
.hamburger {
    display: none;
    width: 30px;
    cursor: pointer;
}

.hamburger span {
    display: block;
    height: 2px;
    background: #011f27;
    margin: 6px 0;
}
.overlay {
  position: fixed;
  top:0;
  left:0;
  width:100%;
  height:100%;
  background:rgba(0,0,0,0.3);
  display:none;
  z-index: 900;
}

.overlay.active {
  display:block;
}

/* ===== スマホ ===== */
@media (max-width: 768px) {

    .hamburger {
        display: block;
        z-index: 1100;
    }

    .nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 240px;
        height: 100vh;

        background: rgba(255,255,255,0.95);
        backdrop-filter: blur(10px);

        display: flex;
        flex-direction: column;
        padding: 60px 20px;
        transition: 0.3s;

        z-index: 1000;
        opacity:0;
	    transform: translateX(20px);
	    pointer-events: none;
	    transition: 0.3s;
    }

    .nav.active {
        opacity:1;
	    transform: translateX(0);
	    pointer-events: auto;
    }

    .nav a {
        padding: 12px 0;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }
}

/* ===== メインビジュアル ===== */
.hero {
    text-align:center;
    padding:60px 20px 40px;
}

.hero-img {
    display:inline-block;
    padding:20px;
    background:rgba(255,255,255,0.5);
    backdrop-filter: blur(6px);
}

.hero-img img {
    max-height: 550px;
    max-width:100%;
    object-fit: contain;

    opacity: 0;
    transform: scale(1.05);
    transition: all 1.2s ease;
}

.hero-img img.show {
    opacity: 1;
    transform: scale(1);
    transition: opacity 1s;
}

.hero-title {
    margin-top:10px;
    font-size:14px;
}

/* ===== 説明 ===== */
.intro {
    text-align:center;
    padding:30px 20px;
    font-size:18px;
    line-height:1.8;
}
.intro p {
    display: inline-block;
    text-align: left;
    max-width: 600px;
    line-height: 1.5;
}

/* ===== ギャラリー ===== */
.gallery {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 18px;
    padding: 40px 60px;
    margin: 0 auto;
    max-width: 900px;
}

.gallery2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    padding: 40px 60px;
    margin: 0 auto;
    max-width: 900px;
}

.gallery .name,
.gallery2 .name{
    font-size: 16px;
}
.gallery a,
.gallery2 a {
    display:inline-block;
    width:100%;
    margin-bottom:18px;
}

.gallery img {
    /*width:100%;*/
    height:400px;
    object-fit:cover;
    border-radius:6px;
    transition:0.4s;
}
.gallery2 img {
    /*width:100%;*/
    height:200px;
    object-fit:cover;
    border-radius:6px;
    transition:0.4s;
}

.gallery img:hover,
.gallery2 img:hover {
    transform:scale(1.04);
    box-shadow:0 10px 25px rgba(0,0,0,0.15);
}

/* ===== セクションタイトル ===== */
.section-title {
    text-align:center;
    margin-top:40px;
    letter-spacing:0.2em;
    font-size:18px;
    opacity:1.0;
}
.section-title span {
    position: relative;
}

.section-title span::after {
  content: "";
  position: absolute;
  left: -5px;
  bottom: 0;
  width: calc(100% + 10px);
  height: 45%;
  background: #f3bf88;
  opacity: 0.6;
  z-index: -1;
  filter: blur(2px);
}

.section-more{
    text-align:center;
    font-size:13px;
    opacity:0.7;
    margin-bottom:80px;
    letter-spacing:0.2em;
}

/* ===== レスポンシブ ===== */
@media (max-width:1200px){
    .gallery {
        grid-template-columns: repeat(3, 1fr);
    }
    .gallery2 {
        grid-template-columns: repeat(1, 1fr);
    }
    .gallery img, .gallery2 img {width:100%;height:auto;}
}
@media (max-width:900px){
    .gallery {
        grid-template-columns: repeat(3, 1fr);
    }
    .gallery img, .gallery2 img {width:100%;height:auto;}
}
@media (max-width:600px){
    .gallery {
        grid-template-columns: repeat(3, 1fr);
        padding: 20px;
    }
    .gallery img, .gallery2 img {width:100%;height:auto;}
}
.footer {
    text-align: center;
    padding: 40px 20px;
    font-size: 12px;
    background: rgba(255,255,255,0.3);
    border-top: 1px solid rgba(0,0,0,0.05);
}

.footer-nav {
    margin-bottom: 10px;
}

.footer-nav a {
    margin: 0 10px;
    text-decoration: none;
    color: #033b4a;
    transition: 0.3s;
}

.footer-nav a:hover {
    opacity: 0.6;
}

.footer-copy {
    color: rgba(0,0,0,0.5);
}
@media (max-width: 600px){
    .footer-nav {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
}

.nav-divider {
    margin: 15px 0;
    border-top: 1px solid rgba(0,0,0,0.1);
}

.nav-sub a {
    font-size: 12px;
    color: rgba(0,0,0,0.6);
}

.nav-sub {
    display: none;
}

@media (max-width: 768px){

.footer-nav {
    display: none;
}
    .nav {
        flex-direction: column; 
        align-items: flex-start;
    }
    .nav-sub {
        display: flex;
        flex-direction: column;
        width: 100%;
    }
    .nav-sub a {
        display: block;
        width: 100%;
        padding: 10px 0;
    }
}

#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background: rgba(0,0,0,0.4);
    color: #fff;
    font-size: 20px;
    text-align: center;
    line-height: 45px;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    transition: 0.3s;
    z-index: 999;
}

/* 表示 */
#backToTop.show {
    opacity: 1;
}

/* hover */
#backToTop:hover {
    background: rgba(0,0,0,0.6);
}