:root{--bg:#F4F2ED;--surface:#FFFFFF;--ink:#232020;--muted:#8A847C;--line:#E5E0D7;--accent:#C8472E;--accent-soft:#FBEDE9;--code-bg:#26221F;--code-ink:#EDE7DC;--radius:14px;--mono:ui-monospace,"SF Mono",Menlo,Consolas,"Roboto Mono",monospace}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Hiragino Kaku Gothic ProN,Hiragino Sans,Yu Gothic,Meiryo,system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;font-feature-settings:"palt";display:flex;flex-direction:column;min-height:100vh}a{color:var(--accent)}.wrap{width:100%;max-width:860px;margin:0 auto;padding:28px 16px 56px;flex:1 0 auto}.wrap.wide{max-width:960px}.crumbs{font-size:12px;color:var(--muted);margin-bottom:14px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}.crumbs a{color:var(--muted);text-decoration:none;font-weight:700}.crumbs a:hover{color:var(--accent)}.crumbs span[aria-hidden]{color:var(--line)}.article{margin-top:8px;margin-bottom:26px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px 24px}.article-title{font-size:18px;font-weight:800;margin-bottom:12px;color:var(--ink)}.article p{font-size:14px;color:var(--ink);line-height:2;margin:0 0 12px}.article p:last-child{margin-bottom:0}@media(max-width:520px){.article{padding:18px 16px}.article p{font-size:13.5px;line-height:1.95}}.faq{margin-top:8px}.faq-title{font-size:18px;font-weight:800;margin-bottom:12px}.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}.faq-item summary{font-size:14px;font-weight:700;color:var(--ink);cursor:pointer;list-style:none;display:flex;align-items:flex-start;gap:8px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:before{content:"Q";color:var(--accent);font-weight:800;flex:0 0 auto}.faq-item summary:after{content:"＋";margin-left:auto;color:var(--muted);font-weight:700}.faq-item[open] summary:after{content:"−"}.faq-item p{font-size:13px;color:var(--muted);line-height:1.8;margin-top:10px;padding-left:18px}.site-hd{background:var(--surface);border-bottom:1px solid var(--line);position:relative;z-index:40}.site-hd .bar{max-width:960px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;gap:18px}.brand{font-weight:800;font-size:17px;color:var(--ink);text-decoration:none}.brand:hover{color:var(--accent)}.nav{display:flex;gap:2px;flex-wrap:wrap;align-items:center}.nav-cat{position:relative}.nav-btn{font:inherit;font-size:13px;font-weight:700;color:var(--muted);background:none;border:none;cursor:pointer;padding:6px 9px;border-radius:8px;white-space:nowrap;display:inline-flex;align-items:center;gap:3px}.nav-btn:after{content:"▾";font-size:10px;opacity:.7}.nav-cat:hover>.nav-btn,.nav-cat:focus-within>.nav-btn,.nav-cat.open>.nav-btn{color:var(--accent);background:var(--accent-soft)}.nav-panel{position:absolute;top:calc(100% + 4px);left:0;z-index:60;min-width:190px;max-width:min(260px,calc(100vw - 24px));background:var(--surface);border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 28px #0000001f;padding:6px;display:none;flex-direction:column;gap:1px}.nav-cat:hover>.nav-panel,.nav-cat:focus-within>.nav-panel,.nav-cat.open>.nav-panel{display:flex}.nav-panel a{font-size:13px;font-weight:600;color:var(--ink);text-decoration:none;padding:7px 10px;border-radius:6px;white-space:nowrap}.nav-panel a:hover{background:var(--accent-soft);color:var(--accent)}.nav-cat:nth-last-child(-n+2)>.nav-panel{left:auto;right:0}@media(max-width:640px){.nav{gap:0}.nav-btn{padding:6px 7px;font-size:12px}.nav-cat{position:static}.nav-cat>.nav-panel,.nav-cat:nth-last-child(-n+2)>.nav-panel{left:16px;right:16px;top:100%;min-width:0;max-width:none}}.site-ft{background:var(--surface);border-top:1px solid var(--line);padding:22px 16px;text-align:center}.ft-links{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:8px}.ft-links a{font-size:12px;font-weight:700;color:var(--muted);text-decoration:none}.ft-links a:hover{color:var(--accent)}.copy{font-size:11px;color:var(--muted)}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:18px}.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--accent);border:1px solid var(--accent);border-radius:99px;padding:3px 12px;margin-bottom:14px}h1{font-size:29px;font-weight:800;line-height:1.25}.lead{color:var(--muted);font-size:14px;margin-top:8px}.prose h2{font-size:18px;margin:26px 0 8px}.prose h3{font-size:15px;margin:18px 0 6px}.prose p{margin:8px 0}.prose ul{margin:8px 0 8px 20px}.prose li{margin:4px 0}.prose code{background:#efebe3;border-radius:4px;padding:1px 5px;font-family:var(--mono);font-size:.92em}.prose .updated{font-size:12px;color:var(--muted);margin-top:4px}@media(max-width:520px){h1{font-size:24px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}