:root{color-scheme:light;--ink:#192f36;--muted:#52666c;--line:#dce5e3;--green:#146c55;--paper:#f6f8f5}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);background:var(--paper);font-family:system-ui,-apple-system,'Noto Sans JP',sans-serif;line-height:1.85}a{color:var(--green);text-underline-offset:4px}header{background:#fff;border-bottom:1px solid var(--line)}.nav{max-width:1180px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:20px 28px}.brand{font-weight:800;letter-spacing:.05em;font-size:21px;text-decoration:none;color:var(--ink)}.brand span{color:var(--green)}nav a{margin-left:24px;font-size:14px}.wrap{max-width:1180px;margin:auto;padding:0 28px}.hero{padding:76px 0 64px;max-width:850px}.eyebrow{font-size:12px;letter-spacing:.16em;font-weight:750;color:var(--green)}h1{font-size:clamp(32px,4.5vw,54px);line-height:1.35;letter-spacing:-.035em;margin:16px 0 24px}h2{font-size:27px;line-height:1.5;margin:0 0 20px}h3{line-height:1.5}p{margin:12px 0 22px}.lead{color:var(--muted);font-size:17px;max-width:690px}.tag{display:inline-block;font-size:12px;padding:3px 10px;border-radius:5px;background:#e2eee8;color:#205d48;font-weight:650}.tag.pending{background:#fff0d6;color:#865819}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:24px 0 64px}.card{padding:30px;background:#fff;border:1px solid var(--line);border-radius:12px}.os{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:12px;background:#f5e6dd;color:#ac481f;font-weight:800}.card h3{font-size:23px;margin:18px 0 8px}.card p{font-size:14px;color:var(--muted)}.card a{font-weight:700}.layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:52px;margin-bottom:72px}aside{align-self:start;position:sticky;top:28px;font-size:14px}aside a{display:block;padding:8px 0;text-decoration:none;color:var(--muted)}article{max-width:800px;min-width:0}article section{background:#fff;padding:32px;border:1px solid var(--line);border-radius:10px;margin-bottom:24px}.notice{border-left:4px solid #be8636;padding:18px 22px;background:#fff3dc;margin:0 0 28px}.notice p{margin:5px 0;font-size:14px}pre{position:relative;white-space:pre-wrap;overflow-wrap:anywhere;background:#172b32;color:#e4f0ea;padding:22px;border-radius:8px;font:13px/1.8 ui-monospace,monospace}code{font-family:ui-monospace,monospace}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;vertical-align:top;padding:12px 8px;border-bottom:1px solid var(--line)}th{white-space:nowrap}figure{margin:24px 0}figure img{width:100%;height:auto;border:1px solid var(--line);border-radius:8px}figcaption{color:var(--muted);font-size:12px}footer{padding:28px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);text-align:center}.small{font-size:13px;color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:15px}.button{display:inline-block;background:var(--green);color:#fff;padding:10px 18px;border-radius:6px;text-decoration:none}.placeholder{border:1px dashed #aebfba;padding:24px;color:var(--muted);font-size:14px;border-radius:8px}@media(max-width:760px){.nav{padding:16px 20px}nav a{margin-left:12px}.wrap{padding:0 20px}.hero{padding:44px 0 36px}.cards{grid-template-columns:1fr}.layout{grid-template-columns:1fr;gap:24px}aside{position:static;border-bottom:1px solid var(--line);padding-bottom:20px}article section{padding:22px}h2{font-size:23px}.section-head{display:block}table{font-size:12px}}

/* Mobile reading and input states; no external fonts or UI dependencies. */
:root{--radius:12px;--focus:#075ac6;--space:8px}
body{overflow-wrap:break-word}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:4px;border-radius:4px}a:hover{text-decoration-thickness:2px}.button:hover{background:#0b5542}.button:active,button:active{transform:translateY(1px)}.skip-link{position:fixed;left:16px;top:12px;z-index:10;background:#fff;padding:12px 20px;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}nav{display:flex;gap:8px;align-items:center}nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;margin:0;padding:0 12px}.brand{display:inline-flex;align-items:center;min-height:44px}.featured{border-color:#9abdae;box-shadow:0 4px 18px #183d2710}.card a{display:inline-flex;align-items:center;min-height:48px}.policy{margin-bottom:64px;max-width:850px}.policy p{margin-bottom:0}.toc summary{font-weight:750;cursor:pointer;min-height:48px;padding:10px 0}.toc-hint{display:none}.toc-links{border-left:2px solid var(--line);padding-left:16px;margin-top:10px}.toc-links a{min-height:44px;display:flex;align-items:center}.command{margin:22px 0;border-radius:8px;overflow:hidden;background:#172b32}.command-bar{display:flex;align-items:center;justify-content:space-between;padding:4px 10px 4px 18px;border-bottom:1px solid #ffffff25;color:#c5d6d1;font-size:12px}.command button{font:inherit;min-width:76px;min-height:44px;color:#e4f0ea;border:1px solid #ffffff40;border-radius:6px;background:transparent;cursor:pointer}.command button:hover{background:#ffffff18}.command pre{margin:0;border-radius:0;white-space:pre;overflow:auto;overflow-wrap:normal;font-size:14px}.copy-status{display:block;padding:0 18px;color:#d6e8e0;font-size:12px}.copy-status:not(:empty){padding-bottom:12px}article h2{scroll-margin-top:24px}article li{margin:10px 0}.notice{border-radius:0 8px 8px 0}section[id]{scroll-margin-top:24px}@media(max-width:760px){.nav{gap:8px;flex-wrap:wrap;padding:10px 20px}.brand{font-size:19px}nav{gap:0}nav a{padding:0 8px;font-size:13px}.hero{padding:32px 0}.hero h1{font-size:34px;line-height:1.5;letter-spacing:-.045em;margin:16px 0}.lead{font-size:16px;line-height:1.9}.button{display:flex;justify-content:center;align-items:center;min-height:52px;width:100%;font-size:14px}.eyebrow{font-size:11px;letter-spacing:.1em}.cards{gap:14px;margin:16px 0 36px}.card{padding:24px}.card h3{font-size:22px}.card p{font-size:15px}.card .tag{font-size:12px}.section-head h2{margin-bottom:4px}.policy{margin-bottom:40px}.layout{gap:16px;margin-bottom:40px}aside{padding:0;border:1px solid var(--line);background:#fff;border-radius:8px}.toc summary{padding:14px 18px;min-height:52px}.toc-hint{display:inline;font-weight:400;color:var(--muted);font-size:12px;margin-left:12px}.toc-links{margin:0 18px 14px;padding-left:14px}.toc-links a{min-height:48px}article section{padding:24px 20px;margin-bottom:16px}article h2{font-size:22px}article p,article li{font-size:15px;line-height:1.95}.notice{padding:18px;margin-bottom:18px}.notice strong{font-size:16px}.notice p{font-size:14px}th{white-space:normal;width:38%}td{width:62%}th,td{padding:12px 6px;font-size:13px}.placeholder{padding:18px}footer{padding:24px 20px max(24px,env(safe-area-inset-bottom))}.command pre{padding:18px;font-size:13px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media(max-width:760px){.hero h1{font-size:clamp(25px,6.8vw,32px);text-wrap:balance}}

.guide-hero{padding:40px 0 32px;max-width:900px}.guide-hero .eyebrow{margin-top:20px}.guide-hero h1{font-size:clamp(28px,3.5vw,42px)}.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:24px 0 40px}.guide-card{display:block;padding:26px;background:#fff;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink)}.guide-card:hover{border-color:var(--green);background:#f0f6f2}.guide-card h2{font-size:23px;margin:12px 0}.guide-card p{color:var(--muted);font-size:15px;margin-bottom:14px}.guide-link{color:var(--green);font-weight:700;font-size:14px}.course-nav{display:block;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:12px}.course-nav a{display:flex;justify-content:flex-start;text-align:left;padding:8px 12px;min-height:44px;border-radius:6px;color:var(--muted);font-size:13px;text-decoration:none}.course-nav a[aria-current="page"]{background:#e2eee8;color:var(--green);font-weight:750}.page-pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:32px 0}.page-pager a{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:18px;background:#fff;border:1px solid var(--line);border-radius:8px;min-height:80px;text-decoration:none}.page-pager small{color:var(--muted);margin-bottom:4px}.page-pager span{font-size:15px;font-weight:700}.page-pager a:last-child{align-items:flex-end;text-align:right}@media(max-width:760px){.guide-hero{padding:28px 0}.guide-hero h1{font-size:28px;text-wrap:balance}.guide-grid{grid-template-columns:1fr;gap:12px;margin:20px 0 28px}.guide-card{padding:22px}.guide-card h2{font-size:22px}.course-nav{display:none}.page-pager{grid-template-columns:1fr;gap:12px}.page-pager a:last-child{align-items:flex-start;text-align:left}.page-pager a{padding:16px}.layout aside{overflow:hidden}}