:root{color-scheme:light;--paper:#fafafa;--ink:#202023;--muted:#6e6e76;--line:#e4e4e9;--accent:#c8472b;font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}
body{margin:0;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:3px solid var(--accent);outline-offset:6px}
.wrap{width:min(1080px,calc(100% - 80px));margin-inline:auto}
.header{height:108px;display:flex;align-items:center;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:23px;font-weight:650;letter-spacing:-1px}
.brand img{display:block}
.header-links{display:flex;align-items:center;gap:18px}
.github{font-size:14px;color:var(--muted);padding:12px 0}
.github span{margin-left:7px}
.github:hover,.footer a:hover{color:var(--accent)}
.hero{text-align:center;padding:78px 0 58px}
.eyebrow{margin:0 0 25px;font-size:14px;letter-spacing:.045em;color:var(--muted)}
h1{font-size:clamp(42px,5.5vw,68px);line-height:1.38;letter-spacing:-.055em;font-weight:700;margin:0}
.intro{font-size:16px;line-height:2;color:var(--muted);margin:26px 0 29px;letter-spacing:.015em}
.intro span{display:inline-block}
.button{display:inline-flex;justify-content:center;align-items:center;gap:11px;min-height:50px;padding:14px 23px;border-radius:8px;background:var(--accent);color:white;font-size:14px;font-weight:600;line-height:1.5;transition:background .18s,transform .18s}
.button:hover{background:#a83a22;transform:translateY(-2px)}
.requirement{font-size:12px;line-height:1.8;color:var(--muted);margin:13px 0 0}
.requirement a{text-decoration:underline;text-underline-offset:3px}
.requirement a:hover{color:var(--accent)}
.preview{margin-top:0;margin-bottom:0}
.preview>img{width:100%;height:auto;display:block;border-radius:14px;border:1px solid var(--line);box-shadow:0 24px 60px -30px rgba(32,32,35,.35)}
figcaption{display:flex;justify-content:space-between;gap:16px;margin-top:17px;font-size:12px;color:var(--muted);line-height:1.8}
.caption-note{letter-spacing:.06em}
.features{display:grid;grid-template-columns:repeat(3,1fr);padding:89px 0 88px;gap:42px}
.features article{border-top:1px solid var(--line);padding-top:23px}
.step{font-size:12px;letter-spacing:.08em;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--accent)}
.features h2{font-size:29px;letter-spacing:-.04em;margin:20px 0 14px;line-height:1.4}
.features p{font-size:14px;line-height:2;color:var(--muted);margin:0}
.closing{text-align:center;border-top:1px solid var(--line);padding:68px 0 76px}
.closing>img{display:block;margin:0 auto 21px}
.closing h2{font-size:26px;letter-spacing:-.035em;line-height:1.5;margin:0 0 24px}
.footer{border-top:1px solid var(--line);padding-block:26px 32px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}
.footer>span{font-weight:650;letter-spacing:-.025em}
@media(min-width:1500px){.hero{padding-top:100px}}
@media(max-width:700px){.wrap{width:calc(100% - 40px)}.header{height:84px}.brand{font-size:21px}.hero{padding:54px 0 40px}.eyebrow{font-size:12px;margin-bottom:22px}h1{font-size:clamp(36px,8.6vw,54px)}.intro{font-size:14px;line-height:1.95;max-width:320px;margin:23px auto 26px}.desktop-break{display:none}.preview>img{border-radius:8px}figcaption{font-size:12px}.caption-note{display:none}.features{grid-template-columns:1fr;padding:52px 0;gap:30px}.features article{padding-top:20px}.features h2{font-size:26px;margin:13px 0 10px}.features p{font-size:14px}.closing{padding:49px 0 53px}.closing h2{font-size:24px}.footer{padding-block:23px}}
@media(prefers-reduced-motion:reduce){.button{transition:none}.button:hover{transform:none}}