:root{--bg:hsl(210 20% 98%);--fg:hsl(220 25% 10%);--card:hsl(0 0% 100%);--primary:hsl(215 80% 45%);--primary-fg:hsl(0 0% 100%);--secondary:hsl(210 20% 94%);--muted-fg:hsl(220 10% 45%);--accent:hsl(200 70% 50%);--border:hsl(214 20% 88%);--radius:.75rem;--hero-grad:linear-gradient(135deg,#183b63 0%, #285d8f 55%, #4f7ca8 100%);--shadow-sm:0 1px 3px 0 hsl(220 25% 10%/.06);--shadow-hover:0 10px 30px -5px hsl(215 80% 45%/.15);--glass-bg:hsl(0 0% 100%/.85);--glass-border:hsl(0 0% 100%/.5)}
.dark{--bg:hsl(220 25% 6%);--fg:hsl(210 20% 93%);--card:hsl(220 20% 10%);--primary:hsl(215 80% 55%);--secondary:hsl(220 15% 16%);--muted-fg:hsl(210 10% 55%);--border:hsl(220 15% 18%);--hero-grad:linear-gradient(135deg,hsl(215 80% 35%),hsl(200 70% 40%));--shadow-sm:0 1px 3px 0 hsl(0 0% 0%/.2);--shadow-hover:0 10px 30px -5px hsl(215 80% 55%/.2);--glass-bg:hsl(220 20% 10%/.85);--glass-border:hsl(220 20% 15%/.5)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:'Noto Sans JP','Inter',sans-serif;font-size:15px;line-height:1.75;transition:background .3s,color .3s}
#loader{position:fixed;top:0;left:0;right:0;height:3px;z-index:9999;background:var(--hero-grad);animation:loadBar .8s ease-out forwards}
@keyframes loadBar{from{transform:scaleX(0);transform-origin:left}to{transform:scaleX(1);transform-origin:left}}
#theme-toggle{position:fixed;top:20px;right:20px;z-index:200;width:44px;height:44px;border-radius:50%;background:var(--glass-bg);border:1px solid var(--glass-border);backdrop-filter:blur(12px);cursor:pointer;font-size:18px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);transition:all .2s}
#theme-toggle:hover{box-shadow:var(--shadow-hover);transform:scale(1.05)}
#scroll-top{position:fixed;bottom:28px;right:28px;z-index:100;width:44px;height:44px;border-radius:50%;background:var(--primary);color:var(--primary-fg);border:none;cursor:pointer;font-size:18px;box-shadow:0 4px 16px hsl(215 80% 45%/.3);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s}
#scroll-top.visible{opacity:1;pointer-events:auto}
#scroll-top:hover{transform:translateY(-3px)}
.hero{background:var(--hero-grad);padding:64px 0 48px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='30' cy='30' r='1' fill='white' fill-opacity='0.06'/%3E%3C/svg%3E");pointer-events:none}
.hero-inner{max-width:860px;margin:0 auto;padding:0 32px;position:relative}
.hero-title{font-family:'Noto Serif JP',serif;font-size:clamp(22px,3.5vw,36px);font-weight:700;color:#fff;letter-spacing:.04em;line-height:1.3;animation:fadeUp .6s ease-out both}
.hero-sub{font-size:14px;color:hsl(0 0% 100%/.7);margin-top:8px;animation:fadeUp .6s .1s ease-out both}
.hero-back{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13px;color:hsl(0 0% 100%/.8);text-decoration:none;padding:5px 14px;border:1px solid hsl(0 0% 100%/.3);border-radius:999px;transition:all .2s;animation:fadeUp .6s .2s ease-out both}
.hero-back:hover{background:hsl(0 0% 100%/.15);color:#fff}
.page-wrap{max-width:1100px;margin:0 auto;padding:36px 24px 80px}
.section{margin-bottom:28px;opacity:0;transform:translateY(20px);transition:opacity .55s,transform .55s}
.section.visible{opacity:1;transform:translateY(0)}
.section-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;transition:box-shadow .3s}
.section-card:hover{box-shadow:var(--shadow-hover)}
.section-header{display:flex;align-items:center;gap:10px;padding:14px 20px 12px;border-bottom:1px solid var(--border);background:var(--secondary)}
.section-icon{width:30px;height:30px;border-radius:8px;background:var(--hero-grad);display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}
.section-title{font-family:'Noto Serif JP',serif;font-size:15px;font-weight:600;color:var(--fg)}
.section-body{padding:18px 20px}
.section-body a{color:var(--primary);text-decoration:none;border-bottom:1px solid hsl(215 80% 45%/.3);transition:border-color .2s,color .2s}
.section-body a:hover{border-bottom-color:var(--primary)}
.item-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.item-list li{padding:10px 14px 10px 30px;border-radius:8px;border:1px solid var(--border);background:var(--bg);font-size:14px;line-height:1.65;transition:background .2s,border-color .2s,transform .2s;position:relative}
.item-list li::before{content:'›';position:absolute;left:12px;top:10px;color:var(--primary);font-size:16px;font-weight:700}
.item-list li:hover{background:var(--secondary);border-color:var(--primary);transform:translateX(2px)}
.news-list{list-style:none;display:flex;flex-direction:column}
.news-item{padding:11px 14px 11px 34px;border-bottom:1px solid var(--border);font-size:14px;line-height:1.7;position:relative;transition:background .2s}
.news-item:last-child{border-bottom:none}
.news-item::before{content:'•';position:absolute;left:14px;top:13px;color:var(--primary);font-size:18px}
.news-item:hover{background:var(--secondary)}
.news-item b,.news-item strong{display:block;padding:7px 10px;background:hsl(215 80% 45%/.07);border-left:3px solid var(--primary);border-radius:0 6px 6px 0;margin:2px 0 4px;color:hsl(215 80% 35%);font-weight:600;font-size:13px}
.dark .news-item b,.dark .news-item strong{background:hsl(215 80% 55%/.12);color:hsl(215 80% 70%)}
.sub-link{display:inline-flex;align-items:center;gap:5px;font-size:13px;color:var(--primary);text-decoration:none;padding:5px 12px;border:1px solid hsl(215 80% 45%/.3);border-radius:999px;margin-top:14px;margin-right:8px;transition:all .2s}
.sub-link:hover{background:var(--primary);color:var(--primary-fg);border-color:var(--primary)}
.photo-entry{margin-bottom:28px;padding-bottom:28px;border-bottom:1px solid var(--border)}
.photo-entry:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.photo-entry-title{font-size:14px;font-weight:600;color:var(--fg);margin-bottom:10px;padding:8px 12px;background:var(--secondary);border-radius:8px;border-left:3px solid var(--primary)}
.photo-grid-imgs{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.photo-grid-imgs img{height:220px;width:auto;border-radius:8px;object-fit:cover;transition:transform .25s,box-shadow .25s;cursor:pointer}
.photo-grid-imgs img:hover{transform:scale(1.02);box-shadow:0 8px 24px hsl(0 0% 0%/.15)}
.photo-grid-imgs video{height:220px;width:auto;border-radius:8px}
.photo-caption{font-size:13px;color:var(--muted-fg);margin-top:6px;line-height:1.6}
.year-nav{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.year-nav a{display:inline-block;padding:5px 14px;background:var(--secondary);border:1px solid var(--border);border-radius:999px;font-size:13px;color:var(--fg);text-decoration:none;transition:all .2s}
.year-nav a:hover,.year-nav a.active{background:var(--primary);color:var(--primary-fg);border-color:var(--primary)}
.staff-card{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.staff-item{background:var(--secondary);border:1px solid var(--border);border-radius:8px;padding:12px 16px;flex:1;min-width:200px}
.staff-role{font-size:11px;font-weight:600;letter-spacing:.06em;color:var(--muted-fg);text-transform:uppercase;margin-bottom:4px}
.staff-name{font-size:14px;font-weight:500}
.members-count{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px}
.count-card{background:var(--secondary);border:1px solid var(--border);border-radius:8px;padding:14px 16px;text-align:center}
.count-label{font-size:11px;color:var(--muted-fg);margin-bottom:6px}
.count-value{font-size:22px;font-weight:700;color:var(--primary)}
.footer{background:hsl(220 25% 8%);color:hsl(210 20% 90%);padding:36px 0 28px;margin-top:20px}
.footer-inner{max-width:860px;margin:0 auto;padding:0 32px;display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:20px}
.footer-name{font-family:'DM Serif Display',serif;font-size:16px;color:hsl(0 0% 100%/.9)}
.footer-detail{font-size:12px;color:hsl(0 0% 100%/.5);line-height:1.9;margin-top:6px}
.footer-detail a{color:hsl(200 70% 65%);text-decoration:none}
.footer-bottom{max-width:860px;margin:20px auto 0;padding:14px 32px 0;border-top:1px solid hsl(220 15% 18%);font-size:12px;color:hsl(0 0% 100%/.3)}
.footer-div{width:36px;height:2px;background:var(--hero-grad);border-radius:2px;margin-bottom:10px}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:640px){.hero{padding:44px 0 32px}.hero-inner,.page-wrap{padding-left:16px;padding-right:16px}.photo-grid-imgs img{height:160px}#theme-toggle{top:12px;right:12px;width:38px;height:38px}}
        .year-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 8px
        }

        .year-nav a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 6px 12px;
            border-radius: 999px;
            font-size: 13px;
            text-decoration: none;
            border: 1px solid hsl(215 80% 45% / .25);
            background: var(--bg);
            color: var(--primary);
            transition: all .2s ease
        }

        .year-nav a:hover {
            background: var(--primary);
            color: var(--primary-fg);
            border-color: var(--primary)
        }

        .year-nav a.active {
            background: var(--primary);
            color: var(--primary-fg);
            border-color: var(--primary);
            pointer-events: none
        }

        .archive-intro {
            font-size: 14px;
            color: var(--muted-fg);
            margin-bottom: 14px;
            line-height: 1.8
        }

        .legacy-content {
            font-size: 14px;
            line-height: 1.9;
            color: var(--fg)
        }

        .legacy-content ul {
            list-style: none;
            padding: 0;
            margin: 0
        }

        .legacy-content li {
            display: block
        }

        .legacy-content img {
            display: inline-block;
            max-width: min(100%, 420px);
            width: auto;
            height: auto;
            margin: 8px 10px 8px 0;
            border-radius: 12px;
            border: 1px solid var(--border);
            background: var(--secondary);
            box-shadow: var(--shadow-sm);
            cursor: zoom-in;
            vertical-align: top
        }

        .legacy-content .video-wrap {
            display: inline-block;
            max-width: min(100%, 540px);
            margin: 10px 12px 10px 0;
            vertical-align: top
        }

        .legacy-content video {
            width: 100%;
            height: auto;
            display: block;
            border-radius: 14px;
            border: 1px solid var(--border);
            background: #000;
            box-shadow: var(--shadow-sm)
        }

        .legacy-content a {
            color: var(--primary);
            text-decoration: none
        }

        .legacy-content a:hover {
            text-decoration: underline
        }

        .legacy-content br {
            content: "";
            display: block;
            margin: .2rem 0
        }

        .past-links strong {
            display: block;
            margin-bottom: 10px
        }

        .past-links ul {
            margin-left: 18px;
            list-style: disc
        }

        .past-links li {
            margin: 6px 0
        }

        .footer {
            background: hsl(220 25% 8%);
            color: hsl(210 20% 90%);
            padding: 36px 0 28px;
            margin-top: 20px
        }

        .footer-inner {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 20px
        }

        .footer-name {
            font-family: 'DM Serif Display', serif;
            font-size: 16px;
            color: hsl(0 0% 100% / .9)
        }

        .footer-detail {
            font-size: 12px;
            color: hsl(0 0% 100% / .5);
            line-height: 1.9;
            margin-top: 6px
        }

        .footer-detail a {
            color: hsl(200 70% 65%);
            text-decoration: none
        }

        .footer-bottom {
            max-width: 960px;
            margin: 20px auto 0;
            padding: 14px 32px 0;
            border-top: 1px solid hsl(220 15% 18%);
            font-size: 12px;
            color: hsl(0 0% 100% / .3)
        }

        .footer-div {
            width: 36px;
            height: 2px;
            background: var(--hero-grad);
            border-radius: 2px;
            margin-bottom: 10px
        }

        .lightbox {
            position: fixed;
            inset: 0;
            background: hsl(220 30% 6% / .82);
            backdrop-filter: blur(10px);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity .25s ease;
            z-index: 1000
        }

        .lightbox.open {
            opacity: 1;
            pointer-events: auto
        }

        .lightbox-inner {
            position: relative;
            max-width: min(1100px, 94vw);
            max-height: 90vh;
            display: flex;
            align-items: center;
            justify-content: center
        }

        .lightbox img {
            max-width: 100%;
            max-height: 90vh;
            display: block;
            border-radius: 16px;
            box-shadow: 0 20px 60px hsl(220 30% 3% / .45);
            background: white
        }

        .lightbox-close {
            position: absolute;
            top: -14px;
            right: -14px;
            width: 42px;
            height: 42px;
            border: none;
            border-radius: 50%;
            background: white;
            color: hsl(220 25% 12%);
            font-size: 24px;
            line-height: 1;
            cursor: pointer;
            box-shadow: 0 12px 30px hsl(220 30% 3% / .28)
        }

        @media (max-width: 640px) {
            .legacy-content img {
                max-width: 100%;
                margin-right: 0
            }

            .legacy-content .video-wrap {
                max-width: 100%;
                margin-right: 0
            }

            .lightbox {
                padding: 16px
            }

            .lightbox-close {
                top: -10px;
                right: -6px;
                width: 38px;
                height: 38px;
                font-size: 22px
            }
        }


        .video-wrap,
        .single-thumb {
            position: relative;
            width: 100%;
            /*aspect-ratio: 4 / 3;   !* SAME SIZE for everything *!*/
            overflow: hidden;
            border-radius: 12px;
            background: #000;      /* fallback for videos */
        }
        .gallery-item{
            position: relative;
            width: 100%;
            overflow: hidden;
            border-radius: 12px;
            background: #000;      /* fallback for videos */
        }
        .gallery-item img,
        .single-thumb img,
        .video-wrap video {
            width: 100%;
            height: auto;
            object-fit: cover;     /* fills space cleanly */
            display: block;
        }
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 12px;
        }
        .gallery-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }