:root{
  --ink:#16181d;--ink2:#4a505c;--ink3:#737a87;--line:#e3e5ea;--soft:#f5f6f8;--bg:#fff;
  --link:#1f4fb4;--navy:#1d3f8f;--text-box:#2f6fde;--obj-box:#6b7280;--chr-box:#d98a00;
  --r:6px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","Liberation Sans","PingFang SC","Microsoft YaHei",sans-serif}
a{color:var(--link);text-underline-offset:2px}
a:hover{color:var(--navy)}
img{max-width:100%;height:auto;display:block}
code{font:0.88em/1.4 ui-monospace,SFMono-Regular,Menlo,Consolas,"DejaVu Sans Mono","Liberation Mono",monospace;background:var(--soft);padding:1px 4px;border-radius:3px;overflow-wrap:anywhere}
pre{font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,"DejaVu Sans Mono","Liberation Mono",monospace}
h1{font-size:2rem;line-height:1.2;margin:28px 0 10px;letter-spacing:-.01em}
h2{font-size:1.35rem;line-height:1.3;margin:40px 0 10px}
h3{font-size:1.05rem;margin:24px 0 6px}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.prose{max-width:820px}
.prose-wide{max-width:1160px}
.narrow{max-width:760px}
.lede{font-size:1.1rem;color:var(--ink2);max-width:760px}
.small{font-size:.875rem;color:var(--ink3)}
.lede.small{font-size:.95rem}

/* header */
.top{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:20}
.top .wrap{display:flex;align-items:center;gap:20px;min-height:54px}
.brand{display:flex;align-items:center;gap:8px;font-weight:650;color:var(--ink);text-decoration:none;white-space:nowrap}
.brand svg{fill:var(--navy)}
.top nav{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto}
.top nav a{color:var(--ink2);text-decoration:none;padding:6px 9px;border-radius:5px;font-size:.93rem}
.top nav a:hover{background:var(--soft);color:var(--ink)}
.top nav a[aria-current]{color:var(--ink);background:var(--soft);font-weight:600}
.menu{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:5px;padding:5px 10px;font:inherit;font-size:.9rem;color:var(--ink)}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px;align-items:start;padding-top:6px}
.hero h1{font-size:2.15rem}
.facts{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;margin:18px 0;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.facts div{min-width:0}
.facts dt{font-size:.8rem;color:var(--ink3)}
.facts dd{margin:0;font-size:.95rem}
.jump{font-size:.95rem}
.tryit{margin-top:22px}
.mini{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mini a{text-decoration:none;color:var(--ink);font-size:.82rem;line-height:1.3}
.mini img{aspect-ratio:1;object-fit:cover;border-radius:var(--r);margin-bottom:4px}
.mini a:hover span{color:var(--link)}
.demo{margin-top:28px}
.demo iframe{width:100%;height:760px;border:1px solid var(--line);border-radius:var(--r);background:var(--soft)}
.demo .small{margin-top:6px}

/* picker */
.pick{margin-top:24px}
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.tabs button{font:inherit;font-size:.92rem;padding:7px 13px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--ink);cursor:pointer}
.tabs button:hover{border-color:#c5c9d2}
.tabs button[aria-selected=true]{background:var(--ink);border-color:var(--ink);color:#fff}
.pickpanel{border:1px solid var(--line);border-radius:var(--r);padding:4px 16px 2px}
.pickpanel .gpus{font-weight:600;margin:12px 0 4px}
table{border-collapse:collapse;width:100%;font-size:.93rem;margin:10px 0}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600;color:var(--ink2);font-size:.85rem;background:var(--soft)}
td.num,th.num{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
tr.sum td{font-weight:600;border-bottom:0}
.files td:first-child a{overflow-wrap:anywhere}
.scroll{overflow-x:auto}
.compare td:first-child{font-weight:600;white-space:nowrap}
.kv th{background:none;width:46%;font-weight:500;color:var(--ink3);font-size:.88rem}
.kv td,.kv th{padding:6px 0}
.btn{display:inline-block;font:inherit;font-size:.9rem;padding:7px 13px;border-radius:5px;border:1px solid var(--ink);background:var(--ink);color:#fff;text-decoration:none;cursor:pointer}
.btn:hover{background:#2c3038;color:#fff}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:#b9bec8}

/* tiles */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px;margin:14px 0}
.tiles.big{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.tile{display:block;text-decoration:none;color:var(--ink)}
.tile img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r);background:var(--soft)}
.tile span{display:block;font-size:.9rem;line-height:1.35;margin-top:6px}
.tile em{display:block;font-style:normal;font-size:.8rem;color:var(--ink3);margin-top:2px}
.tile:hover span{color:var(--link)}

.two{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.links{padding-left:18px}
.links li{margin:6px 0}
.faq h3{margin-top:18px}
.faq p{max-width:760px;margin:4px 0}

/* guides */
.steps{padding-left:22px}
.steps li{margin:10px 0}
.steps li p{margin:4px 0}
.tree{background:var(--soft);padding:12px 14px;border-radius:var(--r);overflow-x:auto}
.errs dt{font-weight:600;margin-top:14px}
.errs dd{margin:4px 0 0}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0 6px}
.pair figcaption{font-size:.9rem;color:var(--ink2);margin-top:4px}
.calc{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r);margin:12px 0}
.calc input,.calc select{font:inherit;width:70px;padding:5px 7px;border:1px solid var(--line);border-radius:4px}
.calc select{width:auto}
.calc output{font-size:1.3rem;font-weight:650;font-variant-numeric:tabular-nums;min-width:120px}

/* sample page */
.crumb{font-size:.88rem;color:var(--ink3);margin:18px 0 0}
.sample{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:28px;align-items:start;margin-top:10px}
.sample h1{margin-top:0;font-size:1.6rem}
.shot.tall .ovwrap img{max-height:none;max-width:360px}
.ovwrap{position:relative;display:inline-block;max-width:100%;vertical-align:top}
.ovwrap img{border-radius:var(--r);width:auto;max-width:100%;max-height:calc(100vh - 110px)}
.ov{position:absolute;inset:0;display:none}
.ovwrap.on .ov{display:block}
.bx{position:absolute;border:2px solid var(--obj-box);background:rgba(107,114,128,.08)}
.bx.t{border-color:var(--text-box);background:rgba(47,111,222,.10)}
.bx.s{border-color:var(--chr-box);background:rgba(217,138,0,.10)}
.bx i{position:absolute;left:0;top:0;font:11px/1.3 -apple-system,"Segoe UI",Roboto,Arial,sans-serif;font-style:normal;background:rgba(255,255,255,.88);color:var(--ink);padding:1px 4px;max-width:100%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.tog{cursor:pointer;color:var(--ink)}
.promptbox{margin-top:28px}
.promptbox h2{margin:0}
.ptext{background:var(--soft);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;white-space:pre-wrap;overflow-wrap:anywhere;max-height:560px;overflow:auto;margin:10px 0 4px}
.pn{display:flex;justify-content:space-between;gap:16px;margin:26px 0 10px;font-size:.93rem}

/* layout builder */
.lb-bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px 14px;margin:10px 0}
.lb-bar .sp{flex:1}
.lb-bar input[type=number]{width:76px}
.lb-bar input,.lb-bar select,.lb-side input,.lb-side textarea,.lb-side select{font:inherit;font-size:.92rem;padding:5px 7px;border:1px solid var(--line);border-radius:4px;background:#fff;color:var(--ink)}
.lb-bar select{max-width:260px}
.lb{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:22px;align-items:start}
.lb-canvas{position:relative;width:100%;background:#fafbfc;border:1px solid #cfd3da;border-radius:4px;touch-action:none;user-select:none;cursor:crosshair;
  background-image:linear-gradient(#eef0f3 1px,transparent 1px),linear-gradient(90deg,#eef0f3 1px,transparent 1px);background-size:6.25% 6.25%}
.lb-canvas .bx{cursor:move}
.lb-canvas .lb-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:fill;opacity:.55;pointer-events:none}
.lb-canvas .bx.sel{outline:2px solid var(--ink);outline-offset:1px}
.lb-canvas .bx b{position:absolute;right:-6px;bottom:-6px;width:12px;height:12px;background:#fff;border:2px solid var(--ink);border-radius:2px;cursor:nwse-resize}
.lb-canvas .bx i{pointer-events:none}
.lb-canvas .bx.bg{pointer-events:none;border-style:dashed;background:none}
.lb-side{max-height:720px;overflow:auto;padding-right:4px}
.blk{display:block;font-size:.88rem;color:var(--ink2);margin-bottom:10px}
.blk textarea,.blk input{display:block;width:100%;margin-top:3px}
.it{border:1px solid var(--line);border-left:4px solid var(--obj-box);border-radius:4px;padding:8px 10px;margin-bottom:8px}
.it.t{border-left-color:var(--text-box)}
.it.s{border-left-color:var(--chr-box)}
.it.sel{border-color:var(--ink)}
.it .row{display:flex;gap:8px;align-items:center;margin-bottom:6px;font-size:.85rem;color:var(--ink3)}
.it .row .sp{flex:1}
.it textarea{width:100%;font-size:.88rem;margin-top:4px}
.it button{font:inherit;font-size:.8rem;background:none;border:0;color:var(--ink3);cursor:pointer;padding:2px 4px}
.it button:hover{color:#b42318}
.lb-out textarea{width:100%;font:13px/1.45 ui-monospace,SFMono-Regular,Menlo,Consolas,"DejaVu Sans Mono","Liberation Mono",monospace;padding:10px 12px;border:1px solid var(--line);border-radius:var(--r);background:var(--soft);color:var(--ink)}
.lb-out{margin-top:16px}

.foot{border-top:1px solid var(--line);margin-top:56px;padding:18px 0 30px;font-size:.88rem;color:var(--ink3)}
.foot p{max-width:860px}

@media (max-width:900px){
  .hero,.sample,.lb,.two{grid-template-columns:1fr}
  .demo{margin-top:0}
  .demo iframe{height:680px}
  .shot.tall .ovwrap img{max-width:300px}
}
@media (max-width:760px){
  .menu{display:block}
  .top .wrap{flex-wrap:wrap}
  .top nav{display:none;width:100%;margin:0 0 8px}
  .top nav.open{display:flex}
  .top nav a{padding:8px 10px}
  h1,.hero h1{font-size:1.6rem}
  .facts{grid-template-columns:1fr 1fr}
  .tiles{grid-template-columns:repeat(2,1fr)}
  .tiles.big{grid-template-columns:repeat(2,1fr)}
  .pair{grid-template-columns:1fr}
  th,td{padding:7px 6px}
}
@media (max-width:760px){
  table.dl thead{display:none}
  table.dl tr{display:block;border-bottom:1px solid var(--line);padding:8px 0}
  table.dl td{display:block;border:0;padding:2px 0}
  table.dl td.num{text-align:left;color:var(--ink3)}
}