:root{--ink:#17241d;--muted:#607067;--paper:#fbfcf8;--leaf:#285f46;--leaf-2:#438362;--moss:#e7efe6;--sand:#f1eadc;--line:#d8e0d7;--white:#fff;--max:1160px;--measure:760px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;line-height:1.8;letter-spacing:.015em}a{color:var(--leaf);text-decoration-thickness:.08em;text-underline-offset:.2em}a:hover{color:#173f2d}img{max-width:100%;height:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;z-index:99;background:#fff;padding:.7rem 1rem}.site-header{background:rgba(251,252,248,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(14px)}.header-inner{max-width:var(--max);margin:auto;min-height:74px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}.brand-mark{width:38px;height:38px}.brand-name{font-family:Georgia,"Yu 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a{color:var(--muted)}.article-layout{max-width:var(--max);margin:0 auto;padding:20px 24px 80px;display:grid;grid-template-columns:minmax(0,var(--measure)) 280px;gap:64px;align-items:start}.article-head{margin-bottom:32px}.article-head h1{font-family:Georgia,"Yu Mincho",serif;font-size:clamp(2rem,4.5vw,3.3rem);line-height:1.35;letter-spacing:.02em;margin:.6rem 0 1rem}.lead{font-size:1.04rem;color:#45564c}.hero-image{width:100%;max-height:480px;object-fit:cover;border-radius:16px;margin:12px 0 34px;background:var(--moss)}.prose{font-size:1rem}.prose h2{font-family:Georgia,"Yu Mincho",serif;font-size:1.75rem;line-height:1.45;border-left:5px solid var(--leaf-2);padding-left:14px;margin:3.2rem 0 1.2rem}.prose h3{font-size:1.3rem;margin:2.3rem 0 .8rem}.prose p{margin:1rem 0}.prose ul,.prose ol{padding-left:1.5rem}.prose li{margin:.35rem 0}.prose figure{margin:1.8rem 0}.prose figcaption{font-size:.78rem;color:var(--muted);text-align:center}.prose table{border-collapse:collapse;width:100%;display:block;overflow:auto;margin:1.5rem 0;background:#fff}.prose th,.prose td{border:1px solid var(--line);padding:.65rem .75rem;text-align:left;vertical-align:top;min-width:115px}.prose th{background:var(--moss)}.prose blockquote{margin:1.5rem 0;padding:1rem 1.25rem;background:var(--moss);border-left:4px solid var(--leaf-2)}.update-box{background:linear-gradient(135deg,#edf5ed,#f8fbf6);border:1px solid #cadbcd;border-radius:14px;padding:20px 24px;margin:0 0 28px}.update-box strong{color:var(--leaf)}.archive-divider{margin:4rem 0 2rem;border-top:1px solid var(--line);padding-top:2rem}.archive-divider h2{border:0;padding:0}.sidebar{position:sticky;top:98px}.sidebox{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:18px}.sidebox h2{font-family:Georgia,"Yu Mincho",serif;font-size:1.1rem;margin:0 0 12px}.sidebox a{display:block;padding:.55rem 0;border-top:1px solid #edf0ec;text-decoration:none;color:var(--ink);font-size:.9rem}.sidebox a:first-of-type{border:0}.site-footer{background:#13291e;color:#dbe6df;padding:46px 24px}.footer-inner{max-width:var(--max);margin:auto;display:flex;justify-content:space-between;gap:40px;align-items:end}.site-footer a{color:#dbe6df}.footer-note{max-width:650px;color:#adc1b4;font-size:.84rem}.pagination{display:flex;gap:8px;justify-content:center;margin-top:40px}.pagination a,.pagination span{padding:.45rem .8rem;border:1px solid var(--line);border-radius:8px;text-decoration:none;background:#fff}.pagination .current{background:var(--leaf);color:#fff}.notice{background:var(--sand);border-radius:12px;padding:18px 20px;margin:22px 0}.notfound{text-align:center;padding:100px 24px}.notfound h1{font-size:5rem;margin:0;color:var(--leaf)}
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@media(max-width:640px){.header-inner{min-height:64px}.menu{display:block}.nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--paper);padding:14px 24px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}.nav.open{display:flex}.grid{grid-template-columns:1fr}.topic-inner{grid-template-columns:1fr}.hero{padding:48px 20px}.wrap,.article-layout{padding-left:18px;padding-right:18px}.footer-inner{display:block}.article-head h1{font-size:2rem}.prose h2{font-size:1.45rem}}
.article-layout>article{min-width:0}.article-head h1,.prose{overflow-wrap:anywhere}.hero-image{display:block;max-width:100%}.prose table{max-width:100%}@media(max-width:900px){.article-layout{display:block}.sidebar{margin-top:48px}}
.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.gallery-grid figure{margin:0}.gallery-grid img{width:100%;height:auto;border-radius:12px}@media(max-width:640px){.gallery-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}