:root{color-scheme:dark;--bg:#101512;--text:#f4f6ed;--dim:#a3b1a7;--mint:#a7f3cb;--line:#ffffff18}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:var(--mint)}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible{outline:3px solid var(--mint);outline-offset:5px}button{font:inherit;cursor:pointer}header,main,footer{max-width:1200px;margin:auto}header{display:flex;justify-content:space-between;align-items:center;padding:30px 36px}.brand{display:flex;align-items:center;gap:10px;font-size:26px;font-weight:750;letter-spacing:-1px}.brand img{border-radius:10px}nav{display:flex;gap:26px;align-items:center;font-size:13px}.status,.pill{border:1px solid #a7f3cb40;border-radius:30px;padding:7px 14px;color:var(--mint);font-size:12px}.skip{position:absolute;left:20px;top:-80px;background:var(--mint);color:#101512;padding:12px;z-index:5}.skip:focus{top:15px}.hero{padding:66px 36px 64px}.eyebrow{font-size:11px;letter-spacing:2.3px;color:var(--mint);font-weight:650}h1,h2,h3,p{margin:0}h1{font-size:clamp(44px,6.5vw,78px);font-weight:650;line-height:1.23;letter-spacing:-3px;margin:22px 0 24px}.lead{color:#c5d1c9;font-size:19px;line-height:1.9}.actions{display:flex;gap:25px;align-items:center;margin-top:32px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:30px;border-radius:12px;background:var(--mint);color:#10231a;padding:14px 24px;font-size:14px;font-weight:650}.button:hover{background:#ceffe2;color:#10231a}.muted{color:var(--dim);font-size:12px}.scene-section{padding:0 36px 70px}.scene{position:relative;height:510px;overflow:hidden;border-radius:24px;background:radial-gradient(ellipse at 24% 60%,#30584390,transparent 60%),#1a231d;border:1px solid var(--line)}.scene-line{position:absolute;left:30px;right:30px;top:22px;display:flex;justify-content:space-between;font-size:11px;color:#aab9ad}.demo-window{position:absolute;border:1px solid #ffffff24;background:#18221de8;box-shadow:0 24px 55px #0004;border-radius:14px;overflow:hidden;transition:opacity .2s,transform .2s}.demo-window[data-hidden=true]{opacity:0;transform:translateY(12px);pointer-events:none}.demo-video{top:82px;left:5%;width:57%;height:294px;transform:rotate(-2deg)}.demo-heading{font-size:11px;display:flex;align-items:center;gap:6px;padding:11px 15px;color:#d7dfd8}.demo-heading span:last-child{margin-left:auto}.dot{width:6px;height:6px;background:var(--mint);border-radius:50%}.abstract{height:202px;background:#b8d7b4;position:relative;overflow:hidden}.orb{background:#345940;border-radius:50%;width:280px;height:280px;position:absolute;left:10%;top:55px;box-shadow:inset -30px 40px 70px #659f6677}.orb.two{background:#e6edbc;width:155px;height:155px;top:-60px;left:68%;box-shadow:inset 10px -20px 50px #91b87977}.play{position:absolute;left:48%;top:39%;font-size:32px;color:#fff9}.demo-caption{font-size:11px;color:#c1cdbf;padding:14px}.demo-feed{left:66%;top:64px;width:29%;min-height:280px;transform:rotate(3deg)}.avatar{font-size:24px;letter-spacing:2px;margin:12px 18px;background:var(--mint);color:#133023;width:43px;height:43px;display:grid;place-items:center;border-radius:50%;font-weight:bold}.demo-feed p{padding:0 18px;font-size:19px;font-weight:600;line-height:1.7}.demo-feed small{display:block;font-size:10px;line-height:1.7;color:var(--dim);padding:12px 18px 18px}.feed-lines{margin:18px;height:21px;background:linear-gradient(#ffffff18 4px,transparent 4px,transparent 12px,#ffffff13 12px,#ffffff13 16px,transparent 16px);width:70%}.demo-music{left:49%;top:340px;width:43%;height:74px;padding:12px;display:flex;gap:13px;align-items:center;transform:rotate(1deg)}.music-art{background:linear-gradient(145deg,#c5d890,#55794c);width:47px;height:47px;display:grid;place-items:center;border-radius:7px;color:#20331d;font-size:27px}.demo-music strong{font-size:12px}.demo-music small{display:block;color:var(--dim);font-size:10px}.demo-music>span{margin-left:auto;font-size:24px}.demo-bar{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);border:1px solid #a7f3cb55;border-radius:13px;display:flex;align-items:center;gap:20px;background:#090e0bec;padding:5px 18px;color:var(--mint);box-shadow:0 10px 30px #0005}.demo-bar button{color:inherit;background:none;border:0;min-width:30px;min-height:34px;font-size:23px;padding:0}.demo-bar button[aria-pressed=false]{opacity:.35}.demo-bar>span{font-size:22px}.demo-bar .grip{font-size:15px;opacity:.4;letter-spacing:-3px}.scene-note{text-align:center;color:var(--dim);font-size:11px;margin-top:18px}.story,.split,.details,.compat{padding:70px 36px;border-top:1px solid var(--line)}h2{font-size:clamp(28px,4vw,44px);line-height:1.45;letter-spacing:-1.5px;margin:16px 0 30px;font-weight:600}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:45px}.steps article>span{font-size:12px;color:var(--mint);display:block;margin-bottom:20px}.steps h3{font-size:19px;margin-bottom:10px}.steps p,.split p,.details p{font-size:14px;color:var(--dim);max-width:440px;line-height:1.95}.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.layout-visual{display:flex;gap:7px;padding:11px;background:#202d23;border:1px solid var(--line);border-radius:18px;box-shadow:0 30px 70px #0003;aspect-ratio:1.65}.layout-visual>div{flex:2;background:#a4c49a;color:#274831;display:flex;flex-direction:column;justify-content:center;padding-left:24px;border-radius:8px;font-size:10px;letter-spacing:2px}.layout-visual>div+div{flex:1;background:#18281e;color:var(--mint)}.layout-visual span{font-size:65px;line-height:1.2;letter-spacing:-3px}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:55px 90px}.detail-grid article>span{display:block;font-size:30px;color:var(--mint);margin-bottom:12px}.detail-grid h3{margin-bottom:12px;font-size:18px}.compat .muted{margin-top:20px;max-width:850px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:13px;text-align:left;min-width:540px}caption{text-align:left;margin:0 0 14px;color:var(--dim)}td,th{padding:15px 14px;border-bottom:1px solid var(--line)}th{color:var(--dim);font-weight:500}.closing{text-align:center;padding:80px 30px 110px;border-top:1px solid var(--line)}.closing h2{margin-top:25px}.closing p{color:var(--dim);font-size:14px;margin-bottom:28px}footer{padding:45px 36px;border-top:1px solid var(--line)}footer>.brand{justify-content:space-between}footer p{font-size:13px;color:var(--dim);margin:12px 0 25px}footer>div{display:flex;gap:25px;font-size:12px;flex-wrap:wrap}footer small{display:block;color:#87978b;font-size:10px;margin-top:25px}.eyes{color:var(--mint);letter-spacing:5px}.guide-hero{padding:70px 36px 65px}.guide-hero h1{font-size:clamp(40px,6vw,65px)}.guide-hero p{color:var(--dim);font-size:15px}.guide-layout{display:grid;grid-template-columns:210px 1fr;gap:65px;padding:0 36px 90px}.guide-layout aside nav{position:sticky;top:25px;display:flex;flex-direction:column;align-items:stretch;gap:9px;font-size:13px}.guide-layout aside a{padding:7px 0}.guide-content section{padding:40px 0;border-top:1px solid var(--line);scroll-margin-top:30px}.guide-content h2{font-size:28px;margin:15px 0 22px}.guide-content p,.guide-content li,.legal p{color:#bccbc1;font-size:14px;line-height:2}.guide-content p+p,.legal p+p{margin-top:16px}ol{padding-left:22px}li{margin-bottom:12px}.guide-content dt{font-weight:650;margin-top:22px}.guide-content dd{margin:8px 0 20px;color:var(--dim);font-size:14px;line-height:1.9}.legal{max-width:790px;padding:0 36px 90px;margin:auto}.legal h2{font-size:24px;margin-top:42px}.legal a{text-decoration:underline}@media(max-width:700px){header{padding:20px}nav{gap:16px}.status{display:none}.hero{padding:40px 23px 45px}h1{letter-spacing:-2px}.lead{font-size:16px}.scene-section{padding:0 15px 45px}.scene{height:430px}.scene-line{left:17px;right:17px;font-size:9px}.demo-video{left:5%;top:65px;width:73%;height:230px}.abstract{height:145px}.demo-feed{left:62%;top:174px;width:34%;min-height:188px}.demo-feed p{font-size:12px;padding:0 10px}.demo-feed .avatar{width:28px;height:28px;font-size:17px;margin:9px 12px}.demo-feed small{font-size:8px;padding:4px 11px}.feed-lines{margin:10px;height:16px}.demo-music{left:5%;top:307px;width:57%;height:61px;gap:8px}.music-art{width:33px;height:33px;font-size:20px}.demo-music strong{font-size:9px}.demo-music small{font-size:8px}.demo-music>span{font-size:17px}.demo-bar{bottom:15px;gap:15px;padding:2px 14px}.demo-bar button{font-size:20px;min-height:30px}.demo-heading{font-size:9px;padding:8px 10px}.demo-caption{font-size:9px;padding:11px}.scene-note{font-size:10px;padding:0 12px}.story,.split,.details,.compat{padding:45px 23px}.steps{grid-template-columns:1fr;gap:26px}.steps article>span{margin-bottom:7px}.split{grid-template-columns:1fr;gap:30px}.detail-grid{grid-template-columns:1fr;gap:35px}.closing{padding:60px 23px}.closing h2{font-size:29px}.guide-hero{padding:40px 23px}.guide-layout{display:block;padding:0 23px 50px}.guide-layout aside nav{position:static;display:grid;grid-template-columns:1fr 1fr;padding-bottom:25px}.guide-content section{padding:30px 0}.legal{padding:0 23px 55px}footer{padding:35px 23px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.demo-window{transition:none}}

/* 最初の画面で、小窓の使い方も一緒に見せる。 */
@media(min-width:1000px){main:has(.hero){display:grid;grid-template-columns:1fr 1.1fr}main:has(.hero)>section{grid-column:1/-1}main:has(.hero)>.hero{grid-column:1;padding:55px 28px 60px 36px}main:has(.hero)>.scene-section{grid-column:2;align-self:center;padding:40px 36px 45px 0}.hero h1{font-size:58px}.hero .lead{font-size:16px}.hero .actions{gap:16px}.scene{height:470px}.demo-feed p{font-size:14px}.demo-feed small{font-size:9px}.demo-music strong{font-size:10px}.demo-music small{font-size:8px}}