:root{--bg:#ffffff;--ink:#111111;--ink-muted:#555;--panel:#f2f2f2;--border:#e6e6e6;--rainbow:linear-gradient(90deg,#ff004c,#ff7a00,#ffd400,#39ff14,#00e5ff,#3d5afe,#b700ff);--radius:16px;--shadow:0 6px 24px rgba(0,0,0,.08);--sidebar-w:260px;--maxw:1200px;--header-h:60px;font-synthesis-weight:none;}
*{box-sizing:border-box;}
html,body{height:100%;}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic","Meiryo",sans-serif;color:var(--ink);background:var(--bg);}
:focus-visible{outline:3px solid transparent;box-shadow:0 0 0 3px #000,0 0 0 6px #fff,0 0 0 9px #0000;}
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;border:0;clip:rect(0 0 0 0);overflow:hidden;}
.app{display:flex;flex-direction:column;min-height:100dvh;}
header{position:relative;display:flex;align-items:center;justify-content:space-between;background-color:white;padding:10px 20px;z-index:1001;margin:0;}
.logo-area{display:flex;align-items:center;text-decoration:none;}
.logo-area img{height:50px;}
.site-name{font-size:24px;font-weight:bold;margin-left:10px;color:black;text-decoration:none;}
.paw{font-size:24px;margin-left:5px;}
.nav-link{margin-left:clamp(10px,2vw,20px);font-size:clamp(14px,2vw,20px);text-decoration:none;color:black;font-weight:bold;}
.sns-links{margin-left:clamp(10px,2vw,40px);}
.sns-links img{width:30px;height:30px;margin:auto 5px;cursor:pointer;transition:transform 0.2s ease;}
.sns-links img:hover{transform:scale(1.1);}
@media (max-width:899.98px){header{position:fixed;top:0;left:0;right:0;z-index:1000;}}
.site-header{display:flex;align-items:center;gap:16px;padding:14px 18px;}
.site-title{font-size:clamp(24px,2vw + 10px,32px);font-weight:800;letter-spacing:.5px;margin:0;}
.site-title a{color:var(--ink);text-decoration:none;position:relative;}
.site-title a::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:3px;border-radius:2px;background:var(--rainbow);opacity:.9;}
.btn-menu{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:40px;height:40px;border:1px solid var(--border);background:#fff;border-radius:10px;box-shadow:var(--shadow);}
.btn-menu .bar{height:2px;width:22px;background:#000;margin:0 auto;display:block;}
.rainbow-line{height:6px;background:var(--rainbow);}
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:0;}
@media (min-width:900px){.layout{grid-template-columns:var(--sidebar-w) minmax(0,1fr);}}
.sidebar{background:var(--panel);border-right:1px solid var(--border);padding:18px;position:sticky;top:0;height:fit-content;}
.sidebar-title{font-weight:600;margin:0 0 12px;color:var(--ink-muted);}
.genre-nav{display:flex;flex-wrap:wrap;gap:10px;}
.genre{appearance:none;border:1px solid var(--border);background:#fff;color:#000;padding:8px 12px;border-radius:999px;cursor:pointer;transition:transform .06s ease,box-shadow .15s ease;}
.genre:hover{transform:translateY(-1px);box-shadow:var(--shadow);}
.genre.active{border-color:#000;box-shadow:0 0 0 2px #000 inset;position:relative;}
.genre.active::after{content:"";position:absolute;inset:-2px;border-radius:999px;z-index:-1;background:var(--rainbow);filter:saturate(1.2);}
.main{max-width:var(--maxw);padding:24px clamp(16px,3vw,28px);margin:0 auto;width:100%;}
.intro p{margin:6px 0 18px;line-height:1.8;color:var(--ink);}
.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(12px,2vw,18px);}
@media (min-width:720px){.gallery{grid-template-columns:repeat(3,minmax(0,1fr));}}
@media (min-width:1100px){.gallery{grid-template-columns:repeat(4,minmax(0,1fr));}}
.card{display:block;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:inherit;transition:transform .15s ease,box-shadow .2s ease,border-color .2s ease;position:relative;}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#000;}
.card figure{margin:0;display:flex;flex-direction:column;}
.card img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#eee;}
.card figcaption{padding:12px 14px;font-weight:600;letter-spacing:.2px;border-top:1px solid var(--border);}
.site-footer{margin-top:auto;padding:24px 18px;color:#666;border-top:1px solid var(--border);text-align:center;}
@media (max-width:899.98px){header{position:fixed;top:0;left:0;right:0;z-index:1000;}.app{padding-top:var(--header-h);}.sidebar{position:fixed;left:0;top:var(--header-h);width:min(86vw,320px);height:calc(100dvh - var(--header-h));background:var(--panel);border-right:1px solid var(--border);box-shadow:12px 0 30px rgba(0,0,0,.12);transform:translateX(-100%);transition:transform .25s ease;z-index:1500;overflow-y:auto;}.sidebar.open{transform:translateX(0);}.layout{grid-template-columns:1fr;}}
@media (prefers-reduced-motion:reduce){.card,.genre,.sidebar{transition:none !important;}}
.sidebar-close{position:absolute;top:10px;right:10px;width:40px;height:40px;border:1px solid var(--border);border-radius:999px;background:#fff;color:#000;font-size:20px;line-height:38px;text-align:center;box-shadow:var(--shadow);cursor:pointer;display:none;}
.sidebar-close:focus-visible{outline:3px solid transparent;box-shadow:0 0 0 3px #000,0 0 0 6px #fff;}
@media (max-width:899.98px){.sidebar-close{display:inline-block;}}
footer{text-align:center;padding:20px;background-color:#f8f8f8;border-top:1px solid #ccc;margin-top:40px;min-width:550px;}

.hori-ads-region1{display:block;margin: 30px auto;width:970px;height:90px;}
.hori-ads-region2{display:none;}
.hori-ads-region3{display:none;}
.hori-ads-region4{display:none;}
@media (max-width:1300px){
    .hori-ads-region1{display:none;}
    .hori-ads-region2{display:block;margin: 30px auto;width:728px;height:90px;}
    .hori-ads-region3{display:none;}
    .hori-ads-region4{display:none;}
}
@media (max-width:1050px){
    .hori-ads-region1{display:none;}
    .hori-ads-region2{display:none;}
    .hori-ads-region3{display:block;margin: 30px auto;width:468px;height:60px;}
    .hori-ads-region4{display:none;}
}
@media (max-width:500px){
    .hori-ads-region1{display:none;}
    .hori-ads-region2{display:none;}
    .hori-ads-region3{display:none;}
    .hori-ads-region4{display:block;margin: 30px auto;width:300px;height:100px;}
}