:root{
  --cream:#f7f0e6;
  --brown:#5b4636;
  --brown-soft:#7a6a55;
  --brown-faint:#b09a7e;
  --line:#e7dac8;
  --shadow:0 2px 8px rgba(120,90,60,.12);
  --shadow-lg:0 4px 14px rgba(120,90,60,.18);
  --serif:Georgia,'Hiragino Mincho ProN','Yu Mincho',serif;
}
*{box-sizing:border-box;}
body{margin:0;background:var(--cream);color:var(--brown);
  font-family:var(--serif);line-height:1.8;}

.hero{text-align:center;padding:40px 20px 18px;}
.hero-photo{width:130px;height:130px;object-fit:cover;border-radius:50%;
  border:5px solid #fff;box-shadow:var(--shadow-lg);background:#e0d2bd;}
.hero-name{font-size:32px;letter-spacing:2px;margin:16px 0 2px;font-weight:normal;}
.hero-breed{font-size:13px;letter-spacing:1px;color:var(--brown-faint);margin:0;}
.hero-intro{max-width:440px;margin:14px auto 0;font-size:14px;color:var(--brown-soft);}

main{max-width:960px;margin:0 auto;padding:10px 22px 30px;}
.section-label{text-align:center;font-size:12px;letter-spacing:4px;
  color:var(--brown-faint);margin:10px 0 18px;}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
.gallery img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:12px;
  box-shadow:var(--shadow);cursor:pointer;background:#e0d2bd;display:block;
  transition:transform .15s ease;}
.gallery img:hover{transform:translateY(-3px);}
.gallery-hint{text-align:center;color:var(--brown-faint);font-size:12px;margin-top:16px;}

.site-footer{text-align:center;padding:20px;font-size:12px;
  color:var(--brown-faint);border-top:1px solid var(--line);margin-top:10px;}

@media(max-width:640px){
  .gallery{grid-template-columns:repeat(2,1fr);}
  .hero-name{font-size:27px;}
}

/* ライトボックス */
.lightbox{position:fixed;inset:0;background:rgba(40,30,20,.86);
  display:flex;align-items:center;justify-content:center;z-index:50;}
.lightbox[hidden]{display:none;}
.lightbox-img{max-width:90vw;max-height:86vh;border-radius:8px;
  box-shadow:0 8px 40px rgba(0,0,0,.5);}
.lb-btn{position:absolute;background:rgba(255,255,255,.15);color:#fff;border:none;
  cursor:pointer;font-size:34px;line-height:1;width:54px;height:54px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;}
.lb-btn:hover{background:rgba(255,255,255,.3);}
.lb-close{top:18px;right:18px;font-size:28px;}
.lb-prev{left:14px;top:50%;transform:translateY(-50%);}
.lb-next{right:14px;top:50%;transform:translateY(-50%);}
@media(max-width:640px){.lb-prev{left:6px;}.lb-next{right:6px;}}

/* キーボード操作のフォーカス表示 */
.gallery img:focus-visible{outline:3px solid #b88a5e;outline-offset:2px;}
.lb-btn:focus-visible{outline:2px solid #fff;outline-offset:2px;}