:root{--bg-dark:#0f172a;--card-bg:rgba(30,41,59,.7);--accent:#38bdf8;--accent-gradient:linear-gradient(135deg,#38bdf8,#818cf8);--text-main:#f8fafc;--text-sub:#94a3b8}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Outfit,Noto Sans JP,sans-serif;background-color:var(--bg-dark);background-image:radial-gradient(circle at 50% 50%,#1e293b 0,#0f172a 100%);color:var(--text-main);min-height:100vh;flex-direction:column;overflow-x:hidden}body,header{display:flex}header{padding:2rem 5%;justify-content:space-between;align-items:center;background:rgba(15,23,42,.8);backdrop-filter:blur(12px);position:sticky;top:0;z-index:100;border-bottom:1px solid hsla(0,0%,100%,.05)}.logo-area a{color:var(--text-main);text-decoration:none;font-size:1.5rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.btn-back{color:var(--text-main);text-decoration:none;padding:.6rem 1.2rem;border-radius:50px;background:hsla(0,0%,100%,.05);border:1px solid hsla(0,0%,100%,.1);font-size:.9rem;font-weight:500;transition:all .3s ease;display:flex;align-items:center;gap:.5rem}.btn-back:hover{background:hsla(0,0%,100%,.1);border-color:var(--accent);transform:translateX(-3px)}main{flex:1;padding:3rem 5%;max-width:1400px;margin:0 auto;width:100%}.gallery-intro{text-align:center;margin-bottom:3.5rem;animation:fadeInUp .8s ease forwards}.gallery-intro h1{font-size:2.5rem;font-weight:800;margin-bottom:1rem;letter-spacing:-.02em;line-height:1.3}.gallery-intro p{color:var(--text-sub);font-size:1.1rem;max-width:700px;margin:0 auto 1.5rem;line-height:1.6}.video-btn{display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;color:#fff;background:#ef4444;padding:.75rem 1.5rem;border-radius:50px;font-weight:600;font-size:.95rem;box-shadow:0 4px 15px rgba(239,68,68,.3);transition:all .3s ease}.video-btn:hover{background:#dc2626;transform:translateY(-2px);box-shadow:0 6px 20px rgba(239,68,68,.4)}.photo-count{text-align:right;font-size:.9rem;color:var(--text-sub);margin-bottom:1rem;font-weight:500}.gallery-load-more{display:flex;flex-direction:column;align-items:center;gap:.75rem;margin:2.5rem 0 0}.gallery-load-more-btn{min-height:48px;min-width:min(100%,280px);padding:.9rem 1.8rem;border:1px solid rgba(56,189,248,.45);border-radius:999px;background:rgba(56,189,248,.12);color:var(--text-main);font:inherit;font-weight:700;cursor:pointer;transition:transform .25s ease,background .25s ease,border-color .25s ease}.gallery-load-more-btn:hover{transform:translateY(-2px);background:rgba(56,189,248,.2);border-color:rgba(56,189,248,.75)}.gallery-complete-message{color:var(--text-sub);font-size:.9rem}.photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;animation:fadeInUp 1s ease .2s forwards;opacity:0}.photo-card{position:relative;border-radius:16px;overflow:hidden;background:var(--card-bg);aspect-ratio:3/2;cursor:pointer;border:1px solid hsla(0,0%,100%,.03);transition:all .4s cubic-bezier(.4,0,.2,1)}.photo-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease;opacity:0}.photo-card.loaded img{opacity:1}.photo-card:hover{transform:translateY(-5px);border-color:rgba(56,189,248,.3);box-shadow:0 10px 30px rgba(0,0,0,.3)}.photo-card:hover img{transform:scale(1.05)}.photo-caption{inset:0;background:linear-gradient(0deg,rgba(15,23,42,.92) 0,rgba(15,23,42,.55) 45%,rgba(15,23,42,0) 75%);color:#fff;display:flex;flex-direction:column;justify-content:flex-end;padding:1rem;opacity:1;transition:opacity .3s ease;font-family:Noto Sans JP,sans-serif;z-index:2}.photo-caption,.photo-number{position:absolute;pointer-events:none}.photo-number{top:.75rem;left:.75rem;z-index:3;padding:.25rem .55rem;border-radius:999px;background:rgba(15,23,42,.7);color:hsla(0,0%,100%,.86);font-size:.72rem;font-weight:800;letter-spacing:.06em}.photo-card:hover .photo-caption{opacity:1}.photo-caption h4{font-size:.82rem;font-weight:600;line-height:1.45;margin-bottom:.25rem;color:#fff;text-shadow:0 1px 4px rgba(0,0,0,.6);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.photo-caption .desc{font-size:.8rem;color:hsla(0,0%,100%,.7)}.lightbox{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(15,23,42,.95);backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;pointer-events:none;transition:opacity .4s ease}.lightbox.active{opacity:1;pointer-events:auto;display:flex}.lightbox-content{max-width:90%;max-height:85vh;position:relative;transform:scale(.9);transition:transform .4s cubic-bezier(.34,1.56,.64,1)}.lightbox.active .lightbox-content{transform:scale(1)}.lightbox img{max-width:100%;max-height:85vh;border-radius:12px;box-shadow:0 20px 50px rgba(0,0,0,.5);border:1px solid hsla(0,0%,100%,.1)}.lightbox-next,.lightbox-prev{position:absolute;top:50%;transform:translateY(-50%);background:rgba(15,23,42,.6);border:none;color:#fff;font-size:2.5rem;width:60px;height:60px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s ease;z-index:1010;backdrop-filter:blur(5px)}.lightbox-prev{left:20px}.lightbox-next{right:20px}.lightbox-next:hover,.lightbox-prev:hover{background:rgba(56,189,248,.8);color:#0f172a;transform:translateY(-50%) scale(1.1)}@media (max-width:768px){.lightbox-next,.lightbox-prev{width:45px;height:45px;font-size:1.5rem}.lightbox-prev{left:10px}.lightbox-next{right:10px}}.lightbox-close{position:absolute;top:-40px;right:0;background:none;border:none;color:#fff;font-size:2rem;cursor:pointer;opacity:.7;transition:opacity .3s ease}.lightbox-close:hover{opacity:1}footer{text-align:center;padding:3rem 5%;border-top:1px solid hsla(0,0%,100%,.05);color:var(--text-sub);font-size:.9rem}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.gallery-intro h1{font-size:2rem}.photo-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.photo-count{text-align:center}.btn-load-more{min-height:44px}.gallery-caption span.desc{font-size:max(11px,.7rem)!important}}.nav-logo-img{width:24px;height:24px;border-radius:50%;margin-right:10px;vertical-align:middle}.nav-logo-text{font-family:Shippori Mincho,serif;font-weight:800}.noscript-container{background:#1e293b;color:#f8fafc;padding:2rem;border-radius:12px;margin:2rem auto;max-width:800px;text-align:center;font-family:sans-serif}.noscript-title{color:#38bdf8;margin-bottom:1rem}.noscript-text{line-height:1.8}.noscript-footer{margin-top:1rem}.noscript-link{color:#38bdf8}