@charset "UTF-8";
:root{color-scheme:dark;--bg:#10150f;--panel:#192217;--ink:#f0f3e9;--muted:#b5c0ad;--line:#ffffff26;--accent:#d7f79f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,"Yu Gothic",Meiryo,sans-serif;line-height:1.85}a{color:inherit;text-underline-offset:5px}a:hover{color:var(--accent)}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:6px}.skip{position:absolute;top:-100px;left:16px;padding:12px;background:var(--accent);color:#14220f;z-index:5}.skip:focus{top:12px}.draft{background:#26331e;color:#d7e5c9;font-size:12px;padding:9px 5%;text-align:center}.wrap{width:min(1180px,90%);margin:auto}header{padding:27px 0;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.brand{text-decoration:none;font-weight:800;font-size:35px;letter-spacing:-2px;line-height:1}.brand span{color:var(--accent)}nav{display:flex;gap:25px;font-size:13px}nav a{text-decoration:none}.eyebrow{font-size:11px;letter-spacing:.18em;color:var(--accent);font-weight:600}.hero{display:grid;grid-template-columns:1.35fr .85fr;align-items:center;gap:65px;padding:76px 0 85px}.hero h1{font-size:clamp(37px,4.5vw,61px);line-height:1.5;font-weight:500;letter-spacing:.03em;margin:18px 0 23px}.hero p{color:var(--muted);max-width:560px;font-size:15px}.button{display:inline-block;text-decoration:none;padding:12px 22px;border:1px solid var(--accent);border-radius:30px;color:var(--accent);font-size:14px;margin-top:17px}.button:hover{color:var(--bg);background:var(--accent)}.visual{aspect-ratio:4/5;border-radius:150px 150px 24px 24px;background:linear-gradient(140deg,#4a6540,#20361e 65%,#152310);position:relative;overflow:hidden;display:grid;place-items:center;box-shadow:inset 0 0 0 1px #ffffff14}.visual:before,.visual:after{content:"";position:absolute;width:75%;aspect-ratio:1;border:1px solid #d7f79f45;border-radius:50%}.visual:before{transform:translateY(-11%)}.visual:after{transform:translateY(11%)}.visual strong{font-size:100px;font-weight:400;line-height:1;color:var(--accent);z-index:1}.visual span{position:absolute;bottom:30px;font-size:10px;letter-spacing:.2em;color:#c5d8b4}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:25px;margin-bottom:28px}.section-head h2{font-size:25px;font-weight:500;margin:0}.section-head span{font-size:12px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.card{border:1px solid var(--line);border-radius:18px;background:var(--panel);padding:28px;display:flex;flex-direction:column;min-height:335px;text-decoration:none}.card .num{font-size:32px;color:var(--accent);font-weight:400}.card h3{font-size:22px;font-weight:500;line-height:1.6;margin:20px 0 10px}.card p{font-size:13px;color:var(--muted);margin:0 0 28px}.card .read{font-size:13px;color:var(--accent);margin-top:auto}.card:hover{border-color:var(--accent)}.principles{margin:65px 0;padding:34px 0;display:grid;grid-template-columns:1fr 2fr;gap:50px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.principles h2{font-size:23px;font-weight:500;margin:0}.principles p{color:var(--muted);font-size:14px;margin:0 0 15px}.notice{border-left:3px solid var(--accent);background:#d7f79f09;padding:18px 22px;margin:26px 0;color:var(--muted);font-size:14px}.article{width:min(760px,100%);margin:55px auto 80px}.breadcrumb{font-size:12px;color:var(--muted);margin:0 0 30px}.article h1{font-size:clamp(30px,4.5vw,42px);font-weight:500;line-height:1.6;letter-spacing:.02em;margin:12px 0 20px}.article .lead{font-size:17px;color:#d0d9c8}.article .meta{font-size:12px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:25px;margin-bottom:35px}.article h2{font-size:24px;font-weight:500;line-height:1.6;margin:42px 0 14px}.article h3{font-size:18px;font-weight:500;margin-top:25px}.article p,.article li{font-size:15px;color:#c3cebb}.article li{padding-left:4px;margin-bottom:12px}.article ul,.article ol{padding-left:24px}.related{border-top:1px solid var(--line);margin-top:45px;padding-top:25px}.related a{display:block;font-size:14px;margin:12px 0}.checklist{list-style:none;padding:0!important}.checklist li{padding:15px 20px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}footer{padding:25px 0 40px;display:flex;justify-content:space-between;align-items:flex-start;gap:25px;font-size:12px;color:var(--muted)}footer .links{display:flex;gap:22px;flex-wrap:wrap}footer p{margin:8px 0;font-size:11px}.small{font-size:12px;color:var(--muted)}@media(max-width:800px){.hero{gap:30px;padding:48px 0}.visual strong{font-size:75px}.grid{grid-template-columns:1fr}.card{min-height:0}.card h3{margin-top:10px}.principles{grid-template-columns:1fr;gap:20px}.hero h1{font-size:38px}.section-head{align-items:flex-start;flex-direction:column;gap:6px}}@media(max-width:560px){header{padding:22px 0;align-items:flex-start}nav{font-size:12px;gap:16px}.brand{font-size:31px}.hero{grid-template-columns:1fr;padding:40px 0 45px;gap:32px}.hero h1{font-size:37px}.visual{aspect-ratio:2/1;border-radius:100px 100px 18px 18px;max-height:220px}.visual:before,.visual:after{width:55%;height:140%;aspect-ratio:auto}.visual:before{transform:translateX(-12%)}.visual:after{transform:translateX(12%)}.visual strong{font-size:80px}.visual span{bottom:16px}.draft{font-size:11px}.article{margin:35px auto 55px}.article h1{font-size:30px}.article p,.article li{font-size:14px}footer{flex-direction:column}.card{padding:24px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Keyboard and small-screen resilience. */
header .brand{flex-shrink:0}nav{flex-wrap:wrap;justify-content:flex-end}nav a{display:inline-flex;align-items:center;min-height:44px}footer .links a{display:inline-flex;align-items:center;min-height:44px}.hero>*{min-width:0}.article p,.article li,.notice{overflow-wrap:anywhere}main:focus{outline:none}#guides{scroll-margin-top:24px}a[aria-current="page"]{color:var(--accent);text-decoration:underline}.related a{padding:8px 0;min-height:44px}@media(max-width:360px){header{gap:12px}nav{gap:5px 12px}.hero h1{font-size:32px}.article h1{font-size:28px}.visual span{font-size:8px;letter-spacing:.12em}footer .links{gap:8px 18px}}

/* Public brand and narrow header layout. */
.brand{font-size:29px;letter-spacing:-1.2px;white-space:nowrap}@media(max-width:560px){header{flex-direction:column;gap:12px}nav{justify-content:flex-start;gap:20px}.brand{font-size:30px}}