:root{--bg:#fbfaf7;--ink:#030213;--mut:#686873;--line:#e4e2db}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Sora,system-ui,sans-serif;font-weight:300;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.top{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:36px;padding:16px clamp(20px,6vw,88px);background:rgba(251,250,247,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-size:15px;font-weight:400}
.top .m{margin-right:auto;display:block}.top .m svg{width:32px;height:32px;display:block}
.top a:not(.m){color:var(--mut)}.top a.on,.top a:not(.m):hover{color:var(--ink)}
.one{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0 24px}
.one{padding:clamp(56px,7vw,96px) 24px clamp(44px,5vw,70px)}.one svg{width:64px;height:64px;margin-bottom:24px}
h1{margin:0;font-weight:300;font-size:clamp(38px,4.4vw,60px);letter-spacing:-.025em}
.one p{margin:16px 0 0;font-size:clamp(18px,1.7vw,23px);line-height:1.5;color:var(--mut)}
.sys{max-width:920px;margin:0 auto;padding:10px 24px 40px}.sys div{display:grid;grid-template-columns:220px 1fr;gap:20px;align-items:baseline;padding:28px 0;border-top:1px solid var(--line)}.sys div:last-child{border-bottom:1px solid var(--line)}
.sys b{font-weight:400;font-size:clamp(20px,1.8vw,24px)}.sys span{color:var(--mut);font-size:clamp(16px,1.3vw,18px);line-height:1.5}
.end{display:flex;justify-content:center;gap:clamp(30px,6vw,80px);flex-wrap:wrap;padding:60px 24px 90px;font-size:clamp(18px,1.6vw,21px)}.end a{border-bottom:1px solid var(--ink);padding-bottom:3px}
footer{text-align:center;padding:0 24px 44px;color:var(--mut);font-size:14px}
.tb{display:none}
@media(max-width:640px){.top{padding:12px 20px}.top a:not(.m){display:none}.one svg{width:56px;height:56px}.sys div{grid-template-columns:1fr;gap:6px;padding:22px 0}.end{padding:70px 24px 80px}
body{padding-bottom:calc(66px + env(safe-area-inset-bottom))}.tb{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:repeat(3,1fr);background:var(--bg);border-top:1px solid var(--line);padding:6px 0 calc(6px + env(safe-area-inset-bottom));font-size:12px;font-weight:400}.tb a{display:flex;align-items:center;justify-content:center;min-height:48px;color:var(--mut)}.tb a.on{color:var(--ink)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.head{text-align:center;padding:clamp(52px,6vw,84px) 24px clamp(36px,4vw,54px)}
.head h1{font-size:clamp(34px,3.6vw,50px)}.head p{margin:14px 0 0;font-size:clamp(17px,1.5vw,21px);line-height:1.5;color:var(--mut)}
.nums{max-width:920px;margin:0 auto;padding:0 24px 56px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;text-align:center}.nums b{display:block;font-weight:400;font-size:clamp(26px,2.5vw,34px);letter-spacing:-.02em}.nums span{display:block;margin-top:6px;color:var(--mut);font-size:15px;line-height:1.45}
.lbl{max-width:920px;margin:0 auto;padding:30px 24px 0;font-size:13px;font-weight:400;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.prj{max-width:920px;margin:0 auto;padding:14px 24px 30px}.prj div{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1.45fr) 92px;gap:20px;align-items:baseline;padding:20px 0;border-top:1px solid var(--line)}.prj div:last-child{border-bottom:1px solid var(--line)}.prj b{font-weight:400;font-size:18px}.prj span{color:var(--mut);font-size:16px;line-height:1.5}.prj i{font-style:normal;color:var(--mut);font-size:14px;text-align:right}
.grid2{max-width:920px;margin:0 auto;padding:14px 24px 30px;display:grid;grid-template-columns:1fr 1fr;gap:0 48px}.grid2 div{padding:20px 0;border-top:1px solid var(--line)}.grid2 b{display:block;font-weight:400;font-size:18px;margin-bottom:6px}.grid2 span{color:var(--mut);font-size:16px;line-height:1.55}
.cta{max-width:920px;margin:0 auto;padding:44px 24px 90px;text-align:center}.cta p{margin:0 0 22px;color:var(--mut);font-size:17px;line-height:1.55}.cta nav{display:flex;justify-content:center;flex-wrap:wrap;gap:12px clamp(24px,4vw,48px);font-size:18px}.cta nav a{border-bottom:1px solid var(--ink);padding-bottom:3px}
@media(max-width:640px){.nums{grid-template-columns:1fr;gap:18px}.prj div{grid-template-columns:1fr;gap:4px;padding:18px 0}.prj i{text-align:left}.grid2{grid-template-columns:1fr}}

/* project page */
.kick{display:block;margin-bottom:14px;font-size:13px;font-weight:400;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.txt{max-width:720px;margin:0 auto;padding:14px 24px 34px}.txt p{margin:0 0 14px;font-size:clamp(17px,1.4vw,19px);line-height:1.65}
.steps{max-width:920px;margin:0 auto;padding:18px 24px 40px;display:grid;grid-template-columns:repeat(4,1fr);gap:0}.steps div{position:relative;padding:22px 20px 0 0;border-top:1px solid var(--ink)}.steps div:not(:last-child)::after{content:"→";position:absolute;top:-13px;right:10px;background:var(--bg);padding:0 6px;color:var(--mut)}
.steps i{font-style:normal;font-size:13px;color:var(--mut)}.steps b{display:block;margin:6px 0 8px;font-weight:400;font-size:19px}.steps span{color:var(--mut);font-size:15px;line-height:1.55}
.list{max-width:720px;margin:0 auto;padding:6px 24px 34px;list-style:none}.list li{padding:16px 0;border-top:1px solid var(--line);font-size:16px;line-height:1.6;color:var(--mut)}.list li:last-child{border-bottom:1px solid var(--line)}.list b{font-weight:400;color:var(--ink)}
.tags{max-width:720px;margin:0 auto;padding:10px 24px 34px;display:flex;flex-wrap:wrap;gap:10px}.tags span{border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:14px;color:var(--mut)}
.pn{max-width:920px;margin:0 auto;padding:30px 24px 80px;display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);font-size:16px}.pn a{color:var(--mut)}.pn a:hover{color:var(--ink)}.pn b{display:block;font-weight:400;color:var(--ink);font-size:18px;margin-top:4px}.pn a:last-child{text-align:right}
.sys a,.prj a{display:contents}
@media(max-width:640px){.steps{grid-template-columns:1fr;gap:22px}.steps div{padding:16px 0 0}.steps div:not(:last-child)::after{content:"↓";top:auto;bottom:-24px;right:auto;left:0;padding:0}}
.sys a:not(:last-child) div,.prj a:not(:last-child) div{border-bottom:0}.sys a:hover b,.prj a:hover b{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.pg .lbl,.pg .nums,.pg .steps,.pg .txt,.pg .list,.pg .tags,.pg .pn{max-width:800px}
@media(max-width:640px){.steps div:not(:last-child)::after{display:none}}
.map{max-width:800px;margin:0 auto;padding:6px 24px 40px;overflow-x:auto}.map table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px}.map th,.map td{text-align:left;padding:12px 14px 12px 0;border-bottom:1px solid var(--line);vertical-align:top}.map th{font-weight:400;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}.map td{color:var(--mut)}.map td:first-child{color:var(--ink)}
.flow{max-width:800px;margin:0 auto;padding:14px 24px 10px;display:grid;grid-template-columns:1fr 18px 1fr 18px 2.2fr 18px 1fr;align-items:stretch}
.flow .n{border:1px solid var(--line);border-radius:10px;padding:14px 12px;background:#fff;font-size:14px;line-height:1.45}.flow .n b{display:block;font-weight:400;font-size:15px;margin-bottom:4px}.flow .n span{color:var(--mut);font-size:13px}
.flow .a{display:flex;align-items:center;justify-content:center;color:var(--mut);font-size:14px}
.flow .core{border-color:var(--ink)}.flow .core ol{margin:8px 0 0;padding:0;list-style:none;display:grid;gap:6px}.flow .core li{font-size:13px;color:var(--mut)}.flow .core li em{font-style:normal;color:var(--ink)}
.back{max-width:800px;margin:0 auto;padding:8px 24px 0;font-size:13px;color:var(--mut);text-align:center}
.code{max-width:800px;margin:0 auto;padding:18px 24px 40px}.code pre{margin:0;padding:16px 18px;border:1px solid var(--line);border-radius:10px;background:#fff;font:13px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--ink);overflow-x:auto}.code p{margin:8px 0 0;font-size:13px;color:var(--mut)}
@media(max-width:640px){.flow{grid-template-columns:1fr}.flow .a{transform:rotate(90deg);height:22px}}
.hood{max-width:800px;margin:0 auto;padding:14px 24px 10px;display:grid;grid-template-columns:1fr 22px 1.7fr 22px 1fr;align-items:center}
.hood .a{text-align:center;color:var(--mut)}
.hood .sdk{display:grid;gap:6px}.hood .sdk span{border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:13px;color:var(--mut);background:#fff;text-align:center}
.hood .cap{font-size:12px;color:var(--mut);line-height:1.45;margin-top:8px;text-align:center}
.hood .core{border:1px solid var(--ink);border-radius:12px;padding:14px;background:#fff}.hood .core>b{display:block;font-weight:400;font-size:15px;margin-bottom:10px}
.hood .t{border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin-top:8px;font-size:13px;line-height:1.5;color:var(--mut)}.hood .t b{display:block;font-weight:400;color:var(--ink);font-size:14px;margin-bottom:2px}.hood .t.d{border-style:dashed}.hood .t i{font-style:normal;font-size:11px;letter-spacing:.08em;text-transform:uppercase}
.hood .ag{border:1px solid var(--line);border-radius:12px;padding:14px;background:#fff;font-size:13px;color:var(--mut);line-height:1.5}.hood .ag b{display:block;font-weight:400;color:var(--ink);font-size:15px;margin-bottom:4px}
@media(max-width:640px){.hood{grid-template-columns:1fr;gap:6px}.hood .a{transform:rotate(90deg)}.hood .sdk{grid-template-columns:repeat(3,1fr)}}
.tags a{border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:14px;color:var(--mut)}.tags a:hover{color:var(--ink);border-color:var(--ink)}
/* thinking */
.posts{max-width:800px;margin:0 auto;padding:10px 24px 80px}.posts a{display:block;padding:26px 0;border-top:1px solid var(--line)}.posts a:last-child{border-bottom:1px solid var(--line)}.posts b{display:block;font-weight:400;font-size:clamp(19px,1.7vw,22px);margin-bottom:8px}.posts span{color:var(--mut);font-size:16px;line-height:1.6}.posts a:hover b{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.post{max-width:720px;margin:0 auto;padding:0 24px 40px;font-size:18px;line-height:1.75}.post p{margin:0 0 18px}.post h2{font-weight:400;font-size:clamp(22px,2vw,26px);margin:44px 0 14px;letter-spacing:-.01em}.post h3,.post h4{font-weight:400;font-size:19px;margin:24px 0 8px}.post strong,.post b{font-weight:400;color:var(--ink)}.post a{border-bottom:1px solid var(--ink)}.post ul,.post ol{padding-left:22px;margin:0 0 18px}.post li{margin:6px 0}
.post .lede{font-size:clamp(19px,1.6vw,21px);color:var(--mut)}.post blockquote{margin:24px 0;padding:4px 0 4px 20px;border-left:2px solid var(--ink);color:var(--mut)}
.post .box{border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:24px 0;background:#fff;font-size:16px}.post .box a{border:0}.post .g2,.post .g3{display:grid;gap:16px;margin:24px 0}.post .g2{grid-template-columns:1fr 1fr}.post .g3{grid-template-columns:repeat(3,1fr)}.post .g2>.box,.post .g3>.box,.post .g2>div,.post .g3>div{margin:0}.post .sm{font-size:15px;color:var(--mut)}
@media(max-width:640px){.post{font-size:17px}.post .g2,.post .g3{grid-template-columns:1fr}}
.head p{max-width:720px;margin-left:auto;margin-right:auto}
.posts .dt{display:block;font-style:normal;font-size:13px;color:var(--mut);margin-bottom:6px}
.one p,.head p,.head h1{text-wrap:balance}@media(max-width:400px){.one p{font-size:16.5px}}
.grid2 .nw{white-space:nowrap}.grid2 ul{list-style:none;margin:0;padding:0}.grid2 li{color:var(--mut);font-size:16px;line-height:1.55;padding:3px 0}.grid2 li a{border-bottom:1px solid var(--line)}.grid2 li a:hover{color:var(--ink);border-color:var(--ink)}
.top .m svg{width:40px;height:40px}@media(max-width:640px){.top .m svg{width:36px;height:36px}}
/* video: still picture first, YouTube loads only on click */
.vid{max-width:800px;margin:0 auto;padding:0 24px 18px}.vid button{position:relative;display:block;width:100%;aspect-ratio:16/9;border:0;padding:0;border-radius:14px;overflow:hidden;cursor:pointer;background:#111 center/cover no-repeat}
.vid button::after{content:"";position:absolute;left:50%;top:50%;width:76px;height:76px;margin:-38px 0 0 -38px;border-radius:50%;background:rgba(251,250,247,.92) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9 6.5v11l9-5.5z' fill='%23030213'/%3E%3C/svg%3E") center/34px no-repeat;box-shadow:0 6px 24px rgba(0,0,0,.25)}
.vid iframe{display:block;width:100%;aspect-ratio:16/9;border:0;border-radius:14px}
.vid p{margin:10px 0 0;font-size:14px;color:var(--mut);text-align:center}.vid p a{border-bottom:1px solid var(--line)}.vid p a:hover{color:var(--ink);border-color:var(--ink)}
.vid button::after{left:26px;top:auto;bottom:26px;margin:0;width:64px;height:64px;background-size:28px}
.vq{padding-top:0;margin-top:-18px;text-align:center}.vq button.lnk{display:inline-flex;align-items:center;gap:10px;width:auto;aspect-ratio:auto;background:none;border:1px solid var(--line);border-radius:999px;padding:9px 18px;font:400 15px Sora,system-ui,sans-serif;color:var(--ink);overflow:visible}.vq button.lnk::after{display:none}.vq button.lnk:hover{border-color:var(--ink)}.vq button.lnk svg{width:14px;height:14px}
.vq iframe{margin-top:6px}
.vq{padding-bottom:34px}