/* CUDA. One stylesheet for every page: deep space, calm enough to read long lessons in.

   One palette, used the same way in prose, callouts, code and every diagram:
     --host   / --cool    cyan-blue   CPU, host code, host memory
     --device / --accent  green       GPU, device code, device memory, a thread at work
     --thread             light green one thread (lane) inside a block or warp
     --block              violet      a thread block, blockIdx
     --warp               amber       a warp of 32 lanes
     --danger             red         errors, limits, dropped launches
   Plain index colors (warps 0 1 2 3, blocks 0 1 2 3) cycle green, cyan, amber, violet.
   Callouts: Note = host cyan, Hint = device green, Watch out = warp amber. */
:root{
  --bg:#0f1628; --bg2:#141c31; --panel:#172036; --panel2:#1d2740; --border:#2e3b5a;
  --text:#e8edf8; --dim:#a3afc8; --dimmer:#6f7b98;
  --accent:#3fcf6e; --accent2:#6ee69a; --cool:#4cc3ff; --on-accent:#04140a;
  --violet:#a78bfa; --amber:#f5b83d; --red:#ff6b6b;
  --host:var(--cool); --device:var(--accent); --thread:var(--accent2); --block:var(--violet); --warp:var(--amber); --danger:var(--red);
  --accent-soft:color-mix(in srgb,var(--accent) 12%,transparent); --accent-line:color-mix(in srgb,var(--accent) 38%,transparent);
  --accent-wash:color-mix(in srgb,var(--accent) 6%,transparent); --cool-line:color-mix(in srgb,var(--cool) 45%,transparent);
  --host-soft:color-mix(in srgb,var(--cool) 13%,transparent); --host-wash:color-mix(in srgb,var(--cool) 7%,transparent);
  --warp-wash:color-mix(in srgb,var(--amber) 8%,transparent); --block-wash:color-mix(in srgb,var(--violet) 9%,transparent);
  --danger-soft:color-mix(in srgb,var(--red) 10%,transparent);
  --nav-bg:rgba(15,22,40,.74);
  --glass:linear-gradient(165deg,rgba(26,38,68,.62),rgba(13,20,38,.72));
  --glass-edge:rgba(120,170,255,.16);
  --glow-edge:0 0 0 1px rgba(120,170,255,.05),0 24px 60px -34px rgba(76,195,255,.32);
  --frame-shadow:0 40px 90px -40px rgba(0,0,0,.9);
  --divider:rgba(200,215,255,.1);
  --card:linear-gradient(160deg,rgba(200,215,255,.05),rgba(200,215,255,.012));
  --card-hover:linear-gradient(160deg,rgba(76,195,255,.09),rgba(167,139,250,.05));
  --code-bg:#111a2e; --code-bar:#162038; --code-text:#dbe4f5; --code-border:rgba(120,170,255,.17);
  --term-bg:#0c1324; --term-text:#cfd8ea; --term-dim:#7a87a3;
  --star:rgba(220,232,255,.9);
  --nebula:
    radial-gradient(42% 38% at 12% 8%,rgba(124,92,255,.13),transparent 70%),
    radial-gradient(38% 34% at 88% 16%,rgba(56,189,248,.10),transparent 72%),
    radial-gradient(55% 40% at 70% 100%,rgba(63,207,110,.06),transparent 72%),
    radial-gradient(40% 40% at 0% 75%,rgba(76,195,255,.05),transparent 70%);
  --head: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", monospace;
  --sans: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", monospace;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", monospace;
}
html[data-mode="light"]{
  --bg:#e6eaf1; --bg2:#dce1eb; --panel:#f2f4f8; --panel2:#e4e8f0; --border:#c3cbda;
  --text:#121a2c; --dim:#465170; --dimmer:#66718d;
  --accent:#178a3e; --accent2:#147a37; --cool:#0a6aa8; --on-accent:#ffffff;
  --violet:#6d3fd6; --amber:#a35d00; --red:#c4302b;
  --nav-bg:rgba(230,234,241,.84);
  --glass:linear-gradient(165deg,rgba(243,245,249,.94),rgba(234,238,245,.94));
  --glass-edge:rgba(60,90,160,.16);
  --glow-edge:0 1px 0 rgba(255,255,255,.8) inset,0 18px 40px -28px rgba(40,70,140,.28);
  --frame-shadow:0 26px 60px -30px rgba(30,45,90,.3);
  --divider:rgba(18,26,44,.1);
  --card:linear-gradient(160deg,rgba(255,255,255,.9),rgba(255,255,255,.6));
  --card-hover:linear-gradient(160deg,rgba(10,106,168,.07),rgba(109,63,214,.04));
  --code-bg:#f8faff; --code-bar:#eef2fa; --code-text:#1b2335; --code-border:#d3dbea;
  --star:transparent;
  --nebula:
    radial-gradient(42% 38% at 12% 6%,rgba(109,63,214,.07),transparent 70%),
    radial-gradient(38% 34% at 88% 14%,rgba(10,106,168,.07),transparent 72%),
    radial-gradient(55% 40% at 70% 100%,rgba(23,138,62,.05),transparent 72%);
}
*{box-sizing:border-box}
html{background:var(--bg);scroll-behavior:smooth}
body{margin:0;color:var(--text);font-family:var(--sans);line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-feature-settings:"cv11","ss01";
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
::selection{background:color-mix(in srgb,var(--cool) 32%,transparent)}
:focus-visible{outline:2px solid var(--cool);outline-offset:2px;border-radius:4px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .cores i{transform:scaleY(.32)!important}
}

/* The backdrop: deep space. Soft nebula glows plus three tiled star layers, all CSS,
   fixed behind the content. Only the finest layer twinkles, and only when motion is welcome. */
.gpu-bg{position:fixed;inset:0;z-index:-1;background:var(--nebula),var(--bg);overflow:hidden;pointer-events:none}
.gpu-bg::before,.gpu-bg::after,.gpu-bg .grid-lines{content:"";position:absolute;inset:0;background-repeat:repeat}
.gpu-bg::before{opacity:.55;background-size:173px 181px;background-image:
  radial-gradient(1px 1px at 23px 41px,var(--star),transparent 100%),radial-gradient(1px 1px at 97px 13px,var(--star),transparent 100%),
  radial-gradient(1px 1px at 141px 92px,var(--star),transparent 100%),radial-gradient(1px 1px at 61px 137px,var(--star),transparent 100%),
  radial-gradient(1px 1px at 158px 166px,var(--star),transparent 100%),radial-gradient(1px 1px at 8px 109px,var(--star),transparent 100%)}
.gpu-bg::after{opacity:.75;background-size:311px 293px;background-image:
  radial-gradient(1.4px 1.4px at 47px 71px,var(--star),transparent 100%),radial-gradient(1.2px 1.2px at 233px 29px,rgba(167,200,255,.9),transparent 100%),
  radial-gradient(1.5px 1.5px at 171px 211px,var(--star),transparent 100%),radial-gradient(1.2px 1.2px at 281px 143px,rgba(196,180,255,.85),transparent 100%)}
.gpu-bg .grid-lines{opacity:.8;background-size:557px 509px;background-image:
  radial-gradient(1.8px 1.8px at 113px 97px,#fff,transparent 100%),radial-gradient(1.6px 1.6px at 401px 331px,rgba(140,220,255,.95),transparent 100%),
  radial-gradient(1.6px 1.6px at 497px 61px,var(--star),transparent 100%),radial-gradient(2px 2px at 241px 443px,rgba(210,195,255,.95),transparent 100%)}
html[data-mode="light"] .gpu-bg::before,html[data-mode="light"] .gpu-bg::after,html[data-mode="light"] .gpu-bg .grid-lines{display:none}
@media (prefers-reduced-motion: no-preference){
  .gpu-bg .grid-lines{animation:twinkle 7s ease-in-out infinite alternate}
  .gpu-bg::before{animation:twinkle 11s ease-in-out -4s infinite alternate}
}
@keyframes twinkle{from{opacity:.25}to{opacity:.85}}
img{max-width:100%;display:block}
a{color:var(--accent2);text-underline-offset:3px}
[hidden]{display:none!important}
.wrap{max-width:none;margin:0;padding-inline:clamp(16px,3vw,40px)}
@media (max-width:700px){.wrap{padding-inline:16px}}
.wrap.narrow{max-width:760px}
code,.mono,kbd,table,.eyebrow{font-family:var(--mono)}
/* No ligatures in code: a beginner must see != and -> exactly as they type them. */
code,pre,kbd,.mono,.dg{font-variant-ligatures:none;font-feature-settings:"liga" 0,"calt" 0}
code{font-size:.92em}

/* Type: JetBrains Mono everywhere (headings, reading text, code, diagram labels). */
h1,h2,h3{font-family:var(--head);font-weight:700;letter-spacing:-.01em;line-height:1.12;margin:0}
h1{font-size:clamp(1.85rem,6.2vw,4.4rem)}
h2{font-size:clamp(1.5rem,4vw,2.9rem);margin:0 0 .35em}
h3{font-size:1.06rem;letter-spacing:-.01em}
p{margin:0 0 1rem}
.lede{color:var(--dim);margin:0 0 1.7rem;font-size:1.06rem;max-width:64ch}
h1+.lede,h2+.lede{margin-top:.75rem}
.note{color:var(--dim);font-size:.9rem;max-width:74ch}

/* An eyebrow numbers the sections, which gives a long page a spine to
   scroll along instead of nine identical headings. */
.eyebrow{display:flex;align-items:center;gap:10px;font-size:.74rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--dim);margin:0 0 14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);flex:none}
.eyebrow b{color:var(--accent);font-weight:700}

section{padding:clamp(52px,5.4vw,82px) 0;position:relative}
section:last-of-type{padding-bottom:clamp(44px,5vw,68px)}
/* Alternating bands carry the rhythm where a page has them; a page that runs
   straight through still gets a rule between sections, and never both. */
.band{background:var(--bg2);border-block:1px solid var(--divider)}
section+section:not(.band){border-top:1px solid var(--divider)}
.band+section{border-top:none}

.skip-link{position:absolute;left:8px;top:calc(-48px - env(safe-area-inset-top,0px));z-index:100;
  background:var(--accent);color:var(--on-accent);font-family:var(--head);font-weight:700;font-size:.85rem;
  text-decoration:none;padding:8px 14px;border-radius:6px;transition:top .15s ease}
.skip-link:focus{top:calc(8px + env(safe-area-inset-top,0px))}

nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:var(--nav-bg);
  backdrop-filter:blur(11px);border-bottom:1px solid var(--border)}
nav .wrap{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px;height:58px}
.brand{display:flex;align-items:center;gap:8px;font-family:var(--head);font-weight:700;color:var(--text);
  text-decoration:none;white-space:nowrap;justify-self:start;grid-column:1;letter-spacing:-.02em}
.brand img{width:22px;height:22px}
nav a.link{color:var(--dim);text-decoration:none;font-size:.9rem;white-space:nowrap;
  font-family:var(--head);font-weight:500;transition:color .15s ease}
nav a.link:hover{color:var(--text)}
.nav-sections{display:flex;gap:22px;justify-self:center;grid-column:2}
.nav-right{display:flex;align-items:center;gap:14px;min-width:0;justify-self:end;grid-column:3}
.lang-btn,.mode-btn{font-family:var(--mono);font-size:.78rem;background:none;border:1px solid var(--border);
  color:var(--dim);border-radius:999px;padding:4px 11px;cursor:pointer;white-space:nowrap;flex:none;
  transition:color .15s ease,border-color .15s ease}
.lang-btn:hover,.mode-btn:hover{color:var(--text);border-color:var(--dimmer)}
/* How far down the page you are, drawn on the navigation's own bottom edge. */
.progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;
  background:linear-gradient(90deg,var(--cool),var(--accent));transition:width .1s linear}
@media (max-width:700px){.nav-sections{display:none}}

/* Hero: a slice of night sky. A planet glow rises behind the title, a thin orbit
   ring crosses it, and the old core bars now read as faint light beams from below. */
.hero{padding:clamp(44px,5.5vw,76px) 0 clamp(40px,4.5vw,60px);overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;z-index:-1;width:760px;height:760px;right:-200px;top:-300px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle at 34% 30%,#3a55a0 0%,#1f2f6c 36%,#111a42 66%,#0a1029 100%);
  box-shadow:inset -40px 40px 80px -40px rgba(76,195,255,.55),0 0 120px -10px rgba(124,92,255,.35)}
.hero::after{content:"";position:absolute;z-index:-1;width:900px;height:190px;right:-270px;top:-15px;border-radius:50%;pointer-events:none;
  border:2px solid rgba(76,195,255,.35);border-top-color:rgba(124,92,255,.12);transform:rotate(-12deg)}
html[data-mode="light"] .hero::before{background:radial-gradient(circle at 34% 30%,#e3e9ff 0%,#c9d4fb 45%,#b7c3f2 75%,#a9b6ea 100%);
  box-shadow:inset -40px 40px 80px -40px rgba(10,106,168,.35),0 0 100px -20px rgba(109,63,214,.25)}
html[data-mode="light"] .hero::after{border-color:rgba(10,106,168,.3);border-top-color:rgba(109,63,214,.1)}
@media (max-width:700px){.hero::before{width:480px;height:480px;right:-220px;top:-300px}.hero::after{display:none}}
.hero .wrap{position:relative;z-index:1}
.hero .cores{position:absolute;left:0;right:0;top:0;height:230px;display:flex;
  align-items:flex-start;gap:clamp(6px,1.6vw,26px);padding-inline:3vw;opacity:.22;z-index:0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 30%,#000 70%,transparent);mask-image:linear-gradient(90deg,transparent,#000 30%,#000 70%,transparent)}
.hero .cores i{flex:1;min-width:1px;max-width:2px;height:100%;font-style:normal;
  background:linear-gradient(to bottom,var(--cool),transparent 85%);
  transform-origin:top;animation:gpuPulse 4s ease-in-out infinite}
.hero .cores i:nth-child(3n){background:linear-gradient(to bottom,var(--violet),transparent 85%)}
.hero .cores i:nth-child(5n){background:linear-gradient(to bottom,var(--accent),transparent 85%)}
.hero .cores i:nth-child(n+33){display:none}
.hero .cores i:nth-child(2n){animation-duration:5.5s;animation-delay:-1.3s}
.hero .cores i:nth-child(3n+1){animation-duration:3.2s;animation-delay:-2.1s}
.hero .cores i:nth-child(4n+2){animation-duration:6.4s;animation-delay:-.6s}
.hero .cores i:nth-child(7n){animation-duration:2.6s;animation-delay:-3.4s}
.hero .cores i:nth-child(11n){animation-duration:7.1s;animation-delay:-4.8s}
@keyframes gpuPulse{0%,100%{transform:scaleY(.15)}50%{transform:scaleY(1)}}
.hero h1{margin:0 0 .35em;max-width:17ch}
.hero h1 .accent{background:linear-gradient(100deg,var(--cool) 0%,var(--violet) 55%,var(--accent) 110%);
  -webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 22px rgba(76,195,255,.28))}
html[data-mode="light"] .hero h1 .accent{filter:none}
.hero .lede{font-size:clamp(1rem,1.6vw,1.16rem);max-width:60ch;margin-bottom:1.8rem}
.tagline{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:.78rem;
  letter-spacing:.06em;color:var(--dim);border:1px solid var(--border);background:var(--panel);
  border-radius:999px;padding:5px 14px;margin:0 0 22px}
.tagline .dot{width:7px;height:7px;border-radius:50%;background:var(--cool);flex:none;
  box-shadow:0 0 0 0 var(--cool-line);animation:ping 2.6s ease-out infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 var(--cool-line)}70%,100%{box-shadow:0 0 0 9px transparent}}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 20px}
.btn{font-family:var(--head);font-size:1rem;font-weight:600;padding:11px 22px;border-radius:999px;text-decoration:none;
  border:1px solid var(--border);display:inline-flex;align-items:center;gap:8px;
  transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:linear-gradient(120deg,var(--accent2),var(--accent) 55%,#2bb9a0);color:var(--on-accent);
  border-color:transparent;font-weight:700;box-shadow:0 0 0 1px rgba(110,230,154,.25),0 12px 34px -12px var(--accent)}
.btn.primary:hover{box-shadow:0 0 0 1px rgba(110,230,154,.45),0 16px 40px -12px var(--accent)}
html[data-mode="light"] .btn.primary{background:var(--accent)}
.btn.ghost{color:var(--text);background:var(--panel)}
.btn.ghost:hover{border-color:var(--dimmer)}
/* The one-line claim strip under the buttons: three facts, no adjectives. */
.facts{display:flex;flex-wrap:wrap;gap:0 26px;font-family:var(--mono);font-size:.82rem;color:var(--dim);
  margin:0 0 26px;padding:0;list-style:none}
.facts li{display:flex;align-items:center;gap:7px}
.facts b{color:var(--text);font-weight:700}
.facts li+li::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--dimmer);
  margin-right:19px;flex:none}

/* The terminal frame the recording plays in. */
.frame{border-radius:16px;overflow:hidden;border:1px solid var(--glass-edge);box-shadow:var(--frame-shadow),var(--glow-edge);
  position:relative}
.frame::after{content:"";position:absolute;inset:0;pointer-events:none;border-radius:14px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06)}
.frame img{width:100%}
.termbar{display:flex;align-items:center;gap:7px;padding:9px 12px}
.termbar i{width:11px;height:11px;border-radius:50%;background:#ff5f57}
.termbar i:nth-child(2){background:#febc2e}
.termbar i:nth-child(3){background:#28c840}
.termbar span{flex:1;text-align:center;font-size:.76rem;letter-spacing:.06em;color:var(--dim);font-family:var(--mono)}
/* Cards */
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;
  display:flex;flex-direction:column;position:relative;overflow:hidden;
  transition:transform .2s ease,border-color .2s ease,background .2s ease}
.card:hover{transform:translateY(-3px);border-color:var(--dimmer);background:var(--card-hover)}
.card .q{font-family:var(--mono);color:var(--text);font-weight:700;margin:0 0 10px;font-size:1rem;
  letter-spacing:-.015em;line-height:1.35}
.card .tab{display:inline-block;align-self:flex-start;font-family:var(--mono);font-size:.72rem;
  letter-spacing:.06em;color:var(--accent);background:var(--accent-soft);
  border:1px solid var(--accent-line);border-radius:999px;padding:3px 10px;margin-bottom:12px}
.card p{margin:0;color:var(--dim);font-size:.93rem}
kbd{font-family:var(--mono);background:var(--panel2);border:1px solid var(--border);border-bottom-width:2px;
  border-radius:6px;padding:2px 8px;font-size:.82rem;color:var(--text)}

table{width:100%;border-collapse:collapse;font-size:.88rem}
th,td{text-align:left;padding:10px;border-bottom:1px solid var(--border)}
th:first-child,td:first-child{padding-left:0}
th:last-child,td:last-child{padding-right:0}
th{color:var(--dim);font-weight:700;font-size:.74rem;text-transform:uppercase;letter-spacing:.08em}
tbody tr:hover td,table tr:hover td{background:var(--accent-wash)}
.tablewrap{overflow-x:auto}
footer{padding:30px 0 44px;color:var(--dim);font-size:.85rem;border-top:1px solid var(--divider)}
footer .row{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center}
footer a{color:var(--dim)}
footer a:hover{color:var(--text)}

/* Sections arrive as you reach them. Without JS, or with reduced motion
   asked for, everything is simply visible. */
.reveal{opacity:0;transform:translateY(18px)}
.revealed{opacity:1;transform:none;transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none}}

.term{background:var(--panel)}
.termbar{background:color-mix(in srgb,var(--panel2) 70%,transparent);border-bottom:1px solid var(--divider)}
.termbody{padding:18px}
nav a.link.on{color:var(--text)}
code{background:color-mix(in srgb,var(--panel2) 85%,transparent);border:1px solid var(--border);border-radius:6px;padding:.08em .38em;font-size:.86em}
pre code,.term code{background:none;border:0;padding:0;font-size:inherit}

.sponsors .logos{display:flex;gap:34px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.sponsors img{height:auto}
.sponsors img{background:#fff;border-radius:10px;padding:10px 14px;box-sizing:content-box}

/* Lesson pages: the track's lessons on the left, the reading column on the right. */
.doc{display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;padding-top:40px;padding-bottom:64px}
.side details{position:sticky;top:78px;max-height:calc(100vh - 100px);overflow:auto}
.side summary{font-family:var(--head);font-weight:600;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--dim);list-style:none;margin-bottom:10px;cursor:default}
.side summary::-webkit-details-marker{display:none}
.side ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--border)}
.side a{display:flex;gap:10px;padding:6px 12px;margin-left:-1px;border-left:2px solid transparent;
  color:var(--dim);text-decoration:none;font-size:.9rem;line-height:1.4;border-radius:0 8px 8px 0;transition:color .15s ease,background .15s ease}
.side a span{font-family:var(--mono);font-size:.74rem;color:var(--dimmer);flex:none;padding-top:.1em}
.side a:hover{color:var(--text)}
.side a.on{color:var(--text);border-left-color:var(--cool);background:linear-gradient(90deg,var(--host-soft),transparent);box-shadow:-6px 0 14px -8px var(--cool)}
.side a.on span{color:var(--cool)}
main{min-width:0;max-width:820px}
@media (max-width:900px){
  .doc{grid-template-columns:1fr;gap:18px;padding-top:24px}
  .side details{position:static;max-height:none;border:1px solid var(--border);border-radius:12px;padding:12px 14px;background:var(--card)}
  .side details:not([open]) summary{margin:0}
  .side summary{cursor:pointer}
  .side summary::after{content:" ▾";color:var(--accent)}
}

/* Reading column: 16px JetBrains Mono, 1.75 leading, lines capped near 72 characters. Diagrams and code may use the full width. */
.prose{font-size:1rem;line-height:1.75}
.prose>p,.prose>ul,.prose>ol,.prose>blockquote:not(.callout),.prose>h2,.prose>h3{max-width:none}
.prose>blockquote.callout,.prose>details{max-width:76ch}
.prose h1{font-size:clamp(1.9rem,4.6vw,2.9rem);margin:0 0 .65em;letter-spacing:-.03em}
.prose h1::after{content:"";display:block;width:72px;height:3px;margin-top:.45em;border-radius:3px;background:linear-gradient(90deg,var(--cool),var(--violet),transparent)}
.prose h2{font-size:clamp(1.35rem,2.8vw,1.7rem);margin:2.3em 0 .75em;padding-top:.2em;position:relative;padding-left:.95em}
.prose h2::before{content:"";position:absolute;left:0;top:.56em;width:.4em;height:.4em;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#fff,var(--cool) 45%,var(--violet));box-shadow:0 0 10px 1px color-mix(in srgb,var(--cool) 55%,transparent)}
html[data-mode="light"] .prose h2::before{background:var(--cool);box-shadow:0 0 0 3px var(--host-soft)}
.prose h3{font-size:1.22rem;font-weight:600;letter-spacing:-.015em;margin:1.9em 0 .6em}
.prose h2 code,.prose h3 code,.prose h1 code{font-size:.86em}
.prose strong{color:var(--text);font-weight:650}
.prose a{color:var(--cool);text-decoration-color:color-mix(in srgb,var(--cool) 45%,transparent);text-decoration-thickness:1px}
.prose a:hover{text-decoration-color:currentColor}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1rem}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--dimmer)}
.prose ol>li::marker{font-family:var(--mono);font-size:.85em;color:var(--cool)}
.prose p{margin:0 0 1.15rem}
.prose img{border-radius:12px;border:1px solid var(--border);margin:1.2em 0;background:#fff}
.prose blockquote{margin:1.2em 0;padding:.2em 0 .2em 18px;border-left:2px solid var(--violet);color:var(--dim)}
.prose table{margin:1.2em 0;display:block;overflow-x:auto;font-size:.86rem}
.prose hr{border:0;border-top:1px solid var(--divider);margin:2em 0}
.prose p:has(> cuda-launch:only-child),.prose p:has(> sm-scheduler:only-child){margin:0}

/* Code: a deep panel with a faint glow on its edge. Syntax colors come from the same palette. */
.highlight{position:relative;margin:0 0 1.2rem}
pre{background:var(--code-bg);color:var(--code-text);border:1px solid var(--code-border);border-radius:12px;padding:16px 18px;margin:0 0 1.2rem;
  overflow-x:auto;font-size:.84rem;font-family:var(--mono);line-height:1.7;box-shadow:var(--glow-edge)}
.highlight pre{margin:0}
.copy{position:absolute;top:10px;right:10px;font-family:var(--mono);font-size:.72rem;background:var(--panel);
  border:1px solid var(--border);color:var(--dim);border-radius:6px;padding:3px 9px;cursor:pointer;opacity:0;transition:opacity .15s ease}
.highlight:hover .copy,.copy:focus{opacity:1}
.copy:hover{color:var(--text);border-color:var(--cool-line)}
.highlight{--sx-c:#7d8cab;--sx-k:#c3a6ff;--sx-t:#6fd3ff;--sx-pp:#f29fd2;--sx-s:#8fe3a4;--sx-n:#ffb86b;--sx-f:#ffd479;--sx-o:#93a3c4}
html[data-mode="light"] .highlight{--sx-c:#5f6b85;--sx-k:#6d3fd6;--sx-t:#0a6aa8;--sx-pp:#a3247f;--sx-s:#16793a;--sx-n:#a34d00;--sx-f:#8a5a00;--sx-o:#4a5570}
.highlight .c,.highlight .c1,.highlight .cm,.highlight .ch,.highlight .cs{color:var(--sx-c);font-style:italic}
.highlight .k,.highlight .kd,.highlight .kr,.highlight .kc,.highlight .kn{color:var(--sx-k)}
.highlight .kt,.highlight .nc,.highlight .nb{color:var(--sx-t)}
.highlight .cp,.highlight .cpf{color:var(--sx-pp)}
.highlight .s,.highlight .s1,.highlight .s2,.highlight .se,.highlight .si,.highlight .sc,.highlight .sa{color:var(--sx-s)}
.highlight .mi,.highlight .mf,.highlight .m,.highlight .mh,.highlight .il{color:var(--sx-n)}
.highlight .nf,.highlight .fm{color:var(--sx-f)}
.highlight .o,.highlight .p{color:var(--sx-o)}

.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:56px}
.pager .card{text-decoration:none;color:var(--text);padding:16px 18px}
.pager .card b{font-family:var(--head);font-weight:600;font-size:1rem}
.pager .next{text-align:right;grid-column:2}
.pager .next .tab{align-self:flex-end}
@media (max-width:560px){.pager{grid-template-columns:1fr}.pager .next{grid-column:1}}

/* Diagrams. Each lane is one thread, each row one warp of 32 lanes. */
.dg{display:block}
.dg{font-family:var(--mono);font-size:.84rem;color:var(--text)}
.prose .dg{margin:1.5em 0 1.8em;border:1px solid var(--glass-edge);border-radius:16px;background:var(--panel);padding:18px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04),var(--glow-edge)}
.dg-head{display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center;justify-content:space-between;margin-bottom:14px}
.dg-call{font-size:1.05rem;white-space:nowrap;background:none;border:0;padding:0}
.dg-call .fn{color:var(--warp)}.dg-call .n{color:var(--accent2);font-weight:700}
.dg-ctl{display:flex;flex-wrap:wrap;gap:10px 22px}
.dg-ctl label{display:flex;align-items:center;gap:10px;color:var(--dim);font-size:.78rem}
.dg-ctl input{accent-color:var(--accent);width:130px}
.dg-stats{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.dg-stats span{border:1px solid var(--border);border-radius:999px;padding:3px 11px;color:var(--dim);font-size:.76rem;background:var(--bg)}
.dg-stats b{color:var(--text)}
.dg-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));
  border:1px dashed var(--border);border-radius:12px;padding:12px;position:relative}
.dg-grid::before{content:"grid";position:absolute;top:-.7em;left:12px;background:var(--panel);padding:0 6px;color:var(--dimmer);font-size:.72rem}
.dg-block{border:1px solid var(--border);border-radius:10px;padding:10px;background:var(--bg2)}
.dg-bh{display:flex;justify-content:space-between;color:var(--dim);font-size:.72rem;margin-bottom:8px}
.dg-bh b{color:var(--text)}
.dg-cells{display:grid;grid-template-columns:repeat(32,1fr);gap:1px}
.dg-cells i{aspect-ratio:1;border-radius:1.5px;background:var(--border);opacity:.35;cursor:crosshair}
.dg-cells i.a{opacity:1}
.dg-cells i.w0{background:var(--accent)}.dg-cells i.w1{background:var(--cool)}
.dg-cells i.w2{background:var(--amber)}.dg-cells i.w3{background:var(--block)}
.dg-cells i.hot{outline:2px solid var(--text);outline-offset:1px;position:relative;z-index:1}
.dg-cells.same i.a:not(.mate){opacity:.35}
.dg-read{margin-top:12px;min-height:3.2em;color:var(--dim);font-size:.8rem;line-height:1.6}
.dg-read b{color:var(--text)}.dg-read em{font-style:normal;color:var(--accent)}
.dg-err{grid-column:1/-1;border:1px solid var(--danger);border-radius:10px;padding:16px;color:var(--text);background:var(--danger-soft)}
.dg-err b{color:var(--danger)}
.dg-legend{display:flex;gap:14px;flex-wrap:wrap;color:var(--dimmer);font-size:.72rem;margin-top:10px}
.dg-legend i{display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:6px;vertical-align:-1px}

.dg-sched{display:grid;gap:14px}
.dg-queue{display:flex;gap:8px;flex-wrap:wrap;min-height:34px;align-items:center}
.dg-queue:empty::after{content:"queue empty";color:var(--dimmer);font-size:.76rem}
.dg-chip{border:1px solid var(--accent-line);background:var(--accent-soft);color:var(--text);border-radius:8px;
  padding:5px 10px;font-size:.78rem;position:relative;overflow:hidden;white-space:nowrap}
.dg-chip::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:var(--p,0%);background:var(--accent);
  transition:width var(--d,0s) linear}
.dg-sms{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.dg-sm{border:1px solid var(--border);border-radius:10px;padding:10px;background:var(--bg2);min-height:78px}
.dg-sm>span{display:block;color:var(--dim);font-size:.72rem;margin-bottom:8px}
.dg-out{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 12px;min-height:4.4em;
  color:var(--dim);font-size:.78rem;line-height:1.7}
.dg-out b{color:var(--accent2);font-weight:400}
.dg-btn{font-family:var(--mono);font-size:.82rem;padding:7px 14px;border-radius:8px;cursor:pointer;
  background:var(--accent);color:var(--on-accent);border:0;font-weight:700}
.dg-btn:disabled{opacity:.5;cursor:default}

/* GPU track diagrams. Shared pieces first: title, segmented tabs, the click-to-read info panel. */
.dg-title{font-family:var(--mono);font-weight:700;font-size:.95rem;letter-spacing:-.01em}
.dg-title.sub{margin:22px 0 10px;font-size:.82rem;color:var(--dim)}
.dg-note{color:var(--dim);font-size:.76rem}
.dg-tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.dg-head .dg-tabs{margin:0}
.dg-tabs button,.dg [data-k]{font:inherit;font-size:.78rem;color:var(--dim);background:var(--bg);border:1px solid var(--border);
  border-radius:8px;padding:6px 11px;cursor:pointer;transition:color .15s ease,border-color .15s ease,background .15s ease}
.dg-tabs button:hover,.dg [data-k]:hover{color:var(--text);border-color:var(--dimmer)}
.dg-tabs button.on,.dg [data-k].on{color:var(--text);border-color:var(--accent);background:var(--accent-soft)}
.dg-info{margin-top:14px;border-left:2px solid var(--accent);padding:6px 0 6px 14px;color:var(--dim);font-size:.82rem;line-height:1.65;min-height:3.4em}
.dg-info b{color:var(--text)}.dg-info em{font-style:normal;color:var(--accent)}
.dg-lbl{display:block;font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dimmer);margin-bottom:8px}
.dg-scroll{overflow-x:auto}
.dg-facts{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.dg-facts span{border:1px solid var(--border);border-radius:999px;padding:3px 11px;font-size:.74rem;background:var(--bg)}
.dg-dots{display:inline-flex;gap:3px;vertical-align:middle}
.dg-dots i{width:8px;height:8px;border-radius:50%;border:1px solid var(--accent-line)}
.dg-dots i.on{background:var(--accent);border-color:var(--accent)}

.dg-tl{overflow-x:auto;padding-bottom:4px}
.dg-eras{display:flex;gap:4px;min-width:980px;margin-bottom:8px}
.dg-eras span{font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;padding:4px 8px;border-radius:6px;color:var(--dim);
  background:var(--accent-wash);border-top:2px solid var(--dimmer)}
.dg-eras .e1{border-top-color:var(--accent)}.dg-eras .e2{border-top-color:var(--cool)}
.dg-nodes{display:flex;gap:4px;min-width:980px;align-items:stretch}
.dg-nodes button{flex:1;display:flex;flex-direction:column;align-items:flex-start;gap:2px;position:relative;padding:8px 8px 12px;min-width:0}
.dg-nodes button b{color:var(--text);font-size:.78rem;white-space:nowrap}
.dg-nodes button span{font-size:.7rem;color:var(--dimmer)}
.dg-nodes button.dim b{color:var(--dim)}
.dg-nodes button i{display:block;width:100%;height:calc(var(--h) * 44px + 2px);margin-top:auto;padding-top:6px;border-radius:3px 3px 0 0;
  background:linear-gradient(to top,var(--accent-line),var(--accent));opacity:.75}

.dg-dev{margin-bottom:14px}
.dg-dev-h{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:baseline;justify-content:space-between;margin-bottom:8px;font-size:.78rem;color:var(--dim)}
.dg-dev-h b{color:var(--text);font-size:.9rem}
.dg-cores{display:flex;flex-wrap:wrap;gap:3px;margin-bottom:8px}
.dg-cores i{width:10px;height:10px;border-radius:2px;background:var(--border);transition:background .08s ease}
.dg-cores.CPU i{width:30px;height:30px;border-radius:5px}
.dg-cores i.a{background:var(--host);box-shadow:0 0 8px -2px var(--host)}
.dg-cores.GPU i.a{background:var(--device);box-shadow:0 0 8px -2px var(--device)}
.dg-track{position:relative;height:18px;border-radius:6px;background:var(--bg);border:1px solid var(--border);overflow:hidden}
.dg-track i{position:absolute;inset:0 auto 0 0;width:0;background:linear-gradient(90deg,var(--accent-line),var(--accent))}
.dg-track span{position:absolute;right:8px;top:0;font-size:.72rem;line-height:16px;color:var(--text)}
.dg-dev .dg-ctl input{width:110px}

.dg-anat{display:grid;grid-template-columns:auto auto 1.25fr 1fr;gap:12px;align-items:stretch}
.dg-col{display:flex;flex-direction:column;gap:6px;border:1px dashed var(--border);border-radius:12px;padding:10px}
.dg-anat .tall{flex:1}
.dg-anat .dg-link{align-self:center;border-style:dashed}
.dg-sms{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}
.dg-sms button{padding:8px 2px;font-size:.68rem}
.dg-units{display:grid;grid-template-columns:repeat(2,1fr);gap:5px}
.dg-units button:last-child{grid-column:span 2}
.dg-smx{border-color:var(--accent-line);background:var(--accent-wash)}
@media (max-width:760px){.dg-anat{grid-template-columns:1fr}.dg-anat .dg-link{justify-self:start}}

.dg-mx{border-collapse:separate;border-spacing:5px;min-width:560px;font-size:.78rem}
.dg-mx th,.dg-mx td{border:0;padding:0;background:none!important;vertical-align:middle}
.dg-mx tr:first-child th{text-align:left;color:var(--text);text-transform:none;letter-spacing:0;font-size:.78rem;padding:4px 6px}
.dg-mx tr:first-child th:first-child span{display:block;color:var(--dimmer);font-weight:400;font-size:.68rem}
.dg-mx small{display:block;color:var(--dimmer);font-weight:400;font-size:.66rem}
.dg-mx tr:not(:first-child) th{color:var(--text);text-transform:none;letter-spacing:0;font-size:.8rem;padding-right:8px;white-space:nowrap}
.dg-mx td button{width:100%;text-align:left}
.dg-mx td.row button:not(.on){border-color:var(--accent-line)}
.dg-mx td.col button:not(.on){border-color:var(--cool-line)}
.dg-none{display:block;text-align:center;color:var(--dimmer)}

.dg-cmp{font-size:.8rem;margin:0 0 14px}
.dg-cmp th,.dg-cmp td{padding:7px 10px}
.dg-cmp tr:first-child th{color:var(--text);font-size:.8rem;text-transform:none;letter-spacing:0}
.dg-cmp tr:not(:first-child) th{color:var(--dim);text-transform:none;letter-spacing:0;font-weight:400;font-size:.78rem}
.dg-cmp tr.same td{color:var(--accent)}
.dg-cmp.only-same tr.diff,.dg-cmp.only-diff tr.same{display:none}
.dg-bars{display:grid;gap:6px;margin-bottom:10px}
.dg-bars div{display:grid;grid-template-columns:130px 1fr auto;gap:10px;align-items:center;font-size:.76rem;color:var(--dim)}
.dg-bars i{height:12px;border-radius:3px;background:linear-gradient(90deg,var(--cool),var(--accent))}
.dg-bars b{color:var(--text)}
.dg-bars.tr div{grid-template-columns:150px 1fr 64px}

.dg-board{display:grid;grid-template-columns:1fr 1.6fr 1fr;grid-template-areas:"cool cool cool" "v1 chip v2" "pwr pwr io";gap:8px;
  border:1px solid var(--border);border-radius:14px;padding:12px;background:repeating-linear-gradient(135deg,var(--bg2),var(--bg2) 10px,var(--panel) 10px,var(--panel) 20px)}
.dg-board .p{border:1px solid var(--border);border-radius:9px;padding:10px;background:var(--panel2);text-align:center;font-size:.74rem;color:var(--dim);
  transition:opacity .3s ease,transform .3s ease}
.dg-board .p.off{opacity:.3;transform:scale(.97);border-style:dashed}
.dg-board .cool{grid-area:cool;border-color:var(--cool-line)}
.dg-board .vram{grid-area:v1}.dg-board .v2{grid-area:v2}
.dg-board .chip{grid-area:chip;padding:22px 10px;border:2px solid var(--accent);background:var(--accent-soft)}
.dg-board .chip b{display:block;color:var(--text);font-size:.95rem}
.dg-board .pwr{grid-area:pwr}.dg-board .io{grid-area:io}
.dg-board small{display:block}
.dg-board.dc .io{text-decoration:line-through}

.dg-tree{display:grid;grid-template-columns:180px 1fr;gap:16px;align-items:start}
.dg-node{border:1px solid var(--border);border-radius:9px;padding:9px 11px;background:var(--bg2);font-size:.78rem}
.dg-node.arch{border-color:var(--accent)}
.dg-node small,.dg-leaves small{display:block;color:var(--dimmer);font-size:.68rem}
.dg-branch{display:grid;grid-template-columns:170px 1fr;gap:10px;align-items:center;margin-bottom:8px}
.dg-leaves{display:flex;flex-wrap:wrap;gap:6px}
.dg-leaves button{text-align:left}
.dg-smgrid{display:grid;grid-template-columns:repeat(24,1fr);gap:2px;margin:10px 0;max-width:420px}
.dg-smgrid i{aspect-ratio:1;border-radius:2px;background:var(--border);opacity:.5}
.dg-smgrid i.a{background:var(--accent);opacity:1}
@media (max-width:640px){.dg-tree,.dg-branch{grid-template-columns:1fr}}

.dg-gantt{display:grid;gap:4px;overflow-x:auto}
.dg-gantt div{display:grid;grid-template-columns:62px repeat(14,minmax(18px,1fr));gap:3px;align-items:center;font-size:.72rem;color:var(--dim)}
.dg-gantt i{height:20px;border-radius:3px;background:var(--bg);border:1px solid var(--divider)}
.dg-gantt i.L,.dg-legend i.L{background:var(--cool);border-color:transparent}
.dg-gantt i.C,.dg-legend i.C{background:var(--accent);border-color:transparent}
.dg-gantt i.W,.dg-legend i.W{background:color-mix(in srgb,var(--danger) 40%,transparent);border-color:transparent}
.dg-ctl label b{color:var(--text)}

.dg-road{height:74px;border-radius:10px;border:1px solid var(--border);background:var(--bg);overflow:hidden;margin:12px 0;padding:6px 0}
.dg-road .lanes{height:100%;display:grid;grid-template-rows:repeat(var(--n),1fr);
  background-image:repeating-linear-gradient(90deg,var(--accent) 0 14px,transparent 14px 34px);background-size:34px 100%;
  -webkit-mask-image:repeating-linear-gradient(180deg,#000 0 2px,transparent 2px calc(62px / var(--n)));
  mask-image:repeating-linear-gradient(180deg,#000 0 2px,transparent 2px calc(62px / var(--n)));
  animation:drive var(--speed) linear infinite}
@keyframes drive{to{background-position:34px 0}}
.dg-big{font-size:.9rem;color:var(--dim)}
.dg-big b{font-size:2rem;color:var(--text);letter-spacing:-.03em}
.dg-big span{margin-left:10px;font-size:.76rem;color:var(--dimmer)}

.dg-rounds{display:flex;gap:3px;align-items:center;height:28px}
.dg-rounds i{flex:none;height:100%;border-radius:4px;background:var(--accent-soft);border:1px solid var(--accent-line);font-style:normal;font-size:.66rem;
  color:var(--dim);display:flex;align-items:center;justify-content:center;overflow:hidden;white-space:nowrap;min-width:0}
.dg-rounds b{margin-left:8px;color:var(--text);font-size:.82rem;white-space:nowrap}

.dg-qa{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.dg-qa div{border:1px solid var(--border);border-radius:10px;padding:12px;background:var(--bg2)}
.dg-qa span{display:block;color:var(--dimmer);font-size:.7rem;margin-bottom:6px}
.dg-qa b{display:block;font-size:1rem;color:var(--text)}
.dg-qa small{color:var(--dim);font-size:.72rem}
.dg-qa div:nth-child(3) b{font-size:.86rem}
.dg-qa .clue{border-color:var(--cool-line)}
.dg-qa .clue.fan{border-color:var(--accent-line)}

.dg-ccnum{display:flex;align-items:flex-end;gap:10px;flex-wrap:wrap;margin:6px 0 16px}
.dg-ccnum span{display:flex;flex-direction:column}
.dg-ccnum b{font-size:2.6rem;line-height:1;color:var(--text);letter-spacing:-.04em}
.dg-ccnum span:first-child b{color:var(--accent)}
.dg-ccnum small{font-size:.68rem;color:var(--dimmer)}
.dg-ccnum .dot{font-size:2.6rem;line-height:1;color:var(--dimmer)}
.dg-ccnum .need{margin-left:auto;border:1px solid var(--cool-line);border-radius:10px;padding:8px 12px;font-size:.72rem;color:var(--dim)}
.dg-ccnum .need b{font-size:1.2rem;color:var(--cool)}
.dg-feats{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));margin-bottom:10px}
.dg-feats div{border:1px solid var(--border);border-radius:10px;padding:10px 12px;opacity:.55}
.dg-feats div.ok{opacity:1;border-color:var(--accent-line);background:var(--accent-wash)}
.dg-feats span{float:right;color:var(--danger)}.dg-feats .ok span{color:var(--accent)}
.dg-feats b{display:block;font-size:.8rem}
.dg-feats small{color:var(--dim);font-size:.72rem}

.dg-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;counter-reset:s}
.dg-steps button{text-align:left;padding:12px;position:relative}
.dg-steps button span{display:block;color:var(--accent);font-size:.7rem;margin-bottom:4px}
.dg-steps button:not(:last-child)::after{content:"→";position:absolute;right:-9px;top:50%;transform:translateY(-50%);color:var(--dimmer);font-size:.8rem}
@media (max-width:640px){.dg-steps{grid-template-columns:1fr 1fr}.dg-steps button::after{display:none}}

.dg-lanes{display:grid;gap:6px}
.dg-lanes div{display:flex;gap:4px;align-items:center;font-size:.72rem;color:var(--dim)}
.dg-lanes span{width:100px;flex:none}
.dg-lanes i{width:44px;height:30px;border-radius:5px;display:flex;align-items:center;justify-content:center;font-style:normal;font-size:.66rem;color:var(--on-accent);font-weight:700}
.dg-lanes i.FP{background:var(--accent)}.dg-lanes i.INT{background:var(--cool)}

.dg-flow{display:flex;flex-direction:column;align-items:stretch;gap:20px;font-size:.78rem}
.dg-flow .st{border:1px solid var(--border);border-radius:9px;padding:8px 12px;background:var(--bg2);text-align:center;position:relative}
.dg-flow>.st:not(:last-child)::after,.dg-flow .path .st:not(:last-child)::after{content:"↓";position:absolute;left:50%;bottom:-19px;transform:translateX(-50%);color:var(--accent);font-size:.85rem;z-index:1}
.dg-flow small{display:block;color:var(--dimmer);font-size:.68rem}
.dg-flow .fork{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.dg-flow .path{display:flex;flex-direction:column;gap:20px;border:1px dashed var(--border);border-radius:10px;padding:8px}
.dg-flow .sass,.dg-flow .drv,.dg-flow .gpu{border-color:var(--accent)}
.dg-flow.jit .sass{opacity:.35;border-color:var(--border)}
.dg-flow.jit .ptx,.dg-flow.jit .drv,.dg-flow.jit .gpu{border-color:var(--cool);background:var(--host-wash)}

.dg-stack{display:flex;flex-direction:column;gap:5px}
.dg-stack button{display:flex;justify-content:space-between;align-items:baseline;gap:12px;text-align:left;padding:11px 14px}
.dg-stack button b{color:var(--text)}
.dg-stack button small{color:var(--dimmer);font-size:.72rem}
.dg-stack button:nth-child(2){margin-inline:10px}.dg-stack button:nth-child(3){margin-inline:20px}
.dg-stack button:nth-child(4){margin-inline:30px}.dg-stack button:nth-child(5){margin-inline:40px}
.dg-stack button.hw{margin-inline:50px;border-color:var(--accent-line);background:var(--accent-wash)}
@media (max-width:560px){.dg-stack button{margin-inline:0!important;flex-direction:column;gap:2px}}

.dg-wsl{display:flex;flex-direction:column;align-items:center;gap:6px}
.dg-wsl .box{width:100%;max-width:480px;border:1px solid var(--border);border-radius:12px;padding:12px 14px;background:var(--bg2);font-size:.78rem}
.dg-wsl .box b{display:block;margin-bottom:6px}
.dg-wsl .linux{border-color:var(--accent-line)}
.dg-wsl .off{opacity:.55}
.dg-wsl .gpu{text-align:center;border-color:var(--accent);font-weight:700}
.dg-wsl .ok{color:var(--accent)}.dg-wsl .no{color:var(--danger)}
.dg-wsl .arrow{color:var(--dim);font-size:.76rem}

.dg-prog{height:4px;border-radius:2px;background:var(--border);overflow:hidden;margin-bottom:12px}
.dg-prog i{display:block;height:100%;width:0;background:var(--accent);transition:width .3s ease}
.dg-check{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.dg-check li{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;margin:0}
.dg-check li>button{width:30px;height:30px;border-radius:50%;padding:0;color:transparent;font-size:.9rem}
.dg-check li.done>button{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.dg-check li.done b{text-decoration:line-through;color:var(--dim)}
.dg-check pre{margin:6px 0;padding:10px 12px;font-size:.76rem}
.dg-check li>div{min-width:0}
.dg-check small{color:var(--dim);font-size:.74rem}

/* Animations. A running launch dims every lane, then lights each warp as it runs. */
.dg-grid.running .dg-cells i.a{opacity:.18}
.dg-grid.running .dg-cells i.a.ran{opacity:1;animation:pop .35s ease-out}
@keyframes pop{from{transform:scale(1.5);filter:brightness(1.6)}to{transform:none;filter:none}}
.dg-gantt i{transition:opacity .2s ease}
.dg-lanes i{transition:opacity .2s ease}

.dg-sync{display:grid;gap:8px;margin-bottom:12px}
.dg-sync div{display:flex;gap:6px;align-items:center;min-height:38px;flex-wrap:wrap}
.dg-sync span{width:44px;flex:none;font-size:.74rem;color:var(--dim)}
.dg-sync i{font-style:normal;font-size:.74rem;padding:8px 11px;border-radius:8px;border:1px dashed var(--border);color:var(--dimmer);
  transition:all .3s ease}
.dg-sync i.on{border-style:solid;border-color:var(--device);color:var(--text);background:var(--accent-soft)}
.dg-sync>div:first-child i.on:not(.wait){border-color:var(--host);background:var(--host-soft)}
.dg-sync i.wait.on{border-color:var(--cool);background:repeating-linear-gradient(135deg,var(--host-soft) 0 8px,transparent 8px 16px);
  background-size:200% 100%;animation:waiting 1s linear infinite}
@keyframes waiting{to{background-position:-22px 0}}
.dg-sync i.dead.on{border-color:var(--danger);color:var(--danger);background:var(--danger-soft);text-decoration:line-through}
.dg-term{font-family:var(--mono);font-size:.78rem;line-height:1.7;background:var(--term-bg);color:var(--term-text);border:1px solid var(--code-border);
  border-radius:10px;padding:10px 14px;min-height:5.6em;margin-bottom:12px;overflow-x:auto;white-space:nowrap}
.dg-term .dg-note{color:var(--term-dim)}
.dg-pf{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.dg-pf .th{display:flex;flex-wrap:wrap;gap:6px}
.dg-pf .dg-chip{opacity:.45;transition:opacity .3s ease}
.dg-pf .dg-chip.done{opacity:1;border-color:var(--accent)}
.dg-pf .buf{min-height:7em;border:1px dashed var(--border);border-radius:10px;padding:8px 10px;font-size:.76rem;color:var(--text)}
.dg-pf .buf div{animation:pop .35s ease-out}
.dg-ctl .dg-btn{align-self:center}
@media (max-width:560px){.dg-pf{grid-template-columns:1fr}}

/* Every code block is a small window: a title bar naming what it is, the body under it. Output is a dark terminal. */
.prose .highlight{position:relative;margin:0 0 1.2rem}
.prose .highlight pre{padding-top:40px}
.prose .highlight::before{content:"code";position:absolute;top:0;left:0;right:0;height:28px;display:flex;align-items:center;padding:0 14px 0 58px;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);
  background-color:var(--code-bar);border:1px solid var(--code-border);border-bottom-color:var(--divider);border-radius:12px 12px 0 0;z-index:1;
  background-image:radial-gradient(circle at 17px 14px,var(--cool) 3.5px,transparent 4px),radial-gradient(circle at 30px 14px,var(--violet) 3.5px,transparent 4px),radial-gradient(circle at 43px 14px,var(--accent) 3.5px,transparent 4px);
  background-repeat:no-repeat}
.prose .language-c::before,.prose .language-cpp::before,.prose .language-cuda::before{content:"cuda c"}
.prose .language-bash::before,.prose .language-sh::before,.prose .language-shell::before{content:"shell"}
.prose .language-text::before{content:"output";color:var(--term-dim);background-color:#0a1020;border-color:rgba(120,170,255,.17)}
.prose .language-text pre{background:var(--term-bg);color:var(--term-text);border-color:rgba(120,170,255,.17)}
.prose .highlight .copy{top:3px;right:8px;opacity:.8;z-index:2}

.dg-hier{display:grid;grid-template-columns:1fr 220px;gap:16px;align-items:start}
.dg-hier .hg{border:1.5px dashed var(--accent-line);border-radius:14px;padding:12px;transition:border-color .2s ease,background .2s ease}
.dg-hier>.hg>span,.dg-hier .hb>span{display:block;font-size:.7rem;letter-spacing:.08em;color:var(--dim);margin-bottom:10px}
.dg-hier .hbs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.dg-hier .hb{border:1px solid var(--border);border-radius:10px;padding:10px;background:var(--bg2);display:grid;gap:6px;transition:border-color .2s ease,background .2s ease}
.dg-hier .ht{border:1px solid var(--border);border-radius:6px;padding:5px 8px;font-size:.72rem;color:var(--text);background:var(--panel);transition:border-color .2s ease,background .2s ease}
.dg-hier .ht.more{color:var(--dimmer);text-align:center}
.dg-hier .hw{border:1px solid var(--border);border-radius:7px;padding:6px;background:var(--panel);transition:border-color .2s ease}
.dg-hier .hw span{display:block;font-size:.66rem;color:var(--dim);margin-bottom:5px}
.dg-hier .dots{display:grid;grid-template-columns:repeat(16,1fr);gap:2px}
.dg-hier .dots i{aspect-ratio:1;border-radius:2px;background:var(--thread);opacity:.3;animation:warprun 2.7s var(--d) ease-in-out infinite}
@keyframes warprun{0%,20%,100%{opacity:.3}8%{opacity:1}}
.dg-hier .hl{display:grid;gap:6px}
.dg-hier .hl button{text-align:left;display:grid;gap:2px}
.dg-hier .hl b{color:var(--text);font-size:.8rem}.dg-hier .hl small{font-size:.7rem;color:var(--dimmer);line-height:1.4}
.dg-hier[data-focus="grid"] .hg{border-color:var(--accent);background:var(--accent-wash)}
.dg-hier .hb{border-top:2px solid color-mix(in srgb,var(--block) 55%,transparent)}
.dg-hier .hw{border-left:2px solid color-mix(in srgb,var(--warp) 55%,transparent)}
.dg-hier[data-focus="block"] .hb{border-color:var(--block);background:var(--block-wash)}
.dg-hier[data-focus="warp"] .hw{border-color:var(--warp);background:var(--warp-wash)}
.dg-hier[data-focus="thread"] .ht:not(.more){border-color:var(--accent);background:var(--accent-soft)}
.dg-hier[data-focus="thread"] .dots i{opacity:1;animation:none}
@media (max-width:640px){.dg-hier{grid-template-columns:1fr}.dg-hier .hbs{grid-template-columns:1fr}}

.dg-ccp{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;position:relative;padding-top:4px}
.dg-ccp>div{border:1px solid var(--border);border-radius:10px;padding:10px;background:var(--bg2);display:grid;gap:6px}
.dg-ccp b{font-size:.82rem}
.dg-ccp .cc{justify-self:start;font-size:.7rem;color:var(--accent);border:1px solid var(--accent-line);background:var(--accent-soft);border-radius:999px;padding:2px 8px}
.dg-ccp .bar{display:grid;gap:3px;font-size:.66rem;color:var(--dimmer)}
.dg-ccp .bar i{display:block;height:8px;border-radius:4px;background:linear-gradient(90deg,var(--accent-line),var(--accent));width:var(--w);animation:grow 1s ease-out both}
.dg-ccp .bar.sm i{background:linear-gradient(90deg,var(--cool-line),var(--cool))}
.dg-ccp .bar em{font-style:normal;color:var(--text);font-size:.72rem}
@keyframes grow{from{width:0}}
@media (max-width:640px){.dg-ccp{grid-template-columns:1fr 1fr}}
.o-num{color:#6ee69a}.o-dim{color:#6f7b98}.o-note{color:#f5b83d}

/* Note / Hint / Watch out callouts. Each has its own color and its own icon shape:
   Note = host cyan circle, Hint = device green rounded square, Watch out = amber triangle. */
.prose blockquote.callout{--co:var(--cool);color:var(--text);border:1px solid color-mix(in srgb,var(--co) 26%,transparent);border-left:3px solid var(--co);border-radius:12px;
  background:linear-gradient(100deg,color-mix(in srgb,var(--co) 11%,transparent),color-mix(in srgb,var(--co) 3%,transparent));
  padding:14px 18px;margin:1.4em 0;font-size:1rem;line-height:1.7;box-shadow:-10px 0 28px -22px var(--co)}
.prose blockquote.callout.tip{--co:var(--accent)}
.prose blockquote.callout.warning{--co:var(--amber)}
.prose blockquote.callout p{margin:0 0 .5em}.prose blockquote.callout p:last-child{margin:0}
.callout-t{display:flex;align-items:center;gap:9px;font-family:var(--head);font-weight:700;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--co,var(--cool));margin-bottom:6px}
.callout-t::before{content:"i";display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--co,var(--cool));color:var(--bg);
  font-family:var(--mono);font-size:.74rem;font-weight:800;letter-spacing:0;text-transform:none;box-shadow:0 0 12px -2px var(--co,var(--cool))}
.callout.tip .callout-t::before{content:"✦";border-radius:6px;font-size:.7rem}
.callout.warning .callout-t::before{content:"!";border-radius:0;clip-path:polygon(50% 4%,100% 96%,0 96%);padding-top:5px;width:22px;font-size:.7rem;box-shadow:none}
html[data-mode="light"] .callout-t::before{color:#fff;box-shadow:none}

/* Narrow screens: long inline code and links wrap, lane diagrams shrink instead of overflowing. */
.prose :not(pre)>code,.prose a{overflow-wrap:anywhere}
.dg-lanes i{flex:0 1 44px;min-width:0}
@media (max-width:560px){.dg-lanes span{width:64px}.dg-lanes i{font-size:.5rem;height:24px}}
.dg-lanes,.dg-check{grid-template-columns:minmax(0,1fr)}
.dg-check li{grid-template-columns:34px minmax(0,1fr)}
.prose p,.prose li{overflow-wrap:break-word}
.prose code.nw{white-space:nowrap}
nav .short{display:none}
@media (max-width:700px){
  .nav-sections{display:flex;gap:14px;justify-self:end}
  nav .long,nav .gh{display:none}
  nav .short{display:inline}
  nav .wrap{gap:12px}
  .facts li+li::before{display:none}
  .facts{gap:4px 18px}
}
@media (max-width:560px){.dg-gantt div{grid-template-columns:48px repeat(14,minmax(0,1fr));gap:2px}.dg-gantt{overflow:visible}}
.hero h1{max-width:none;white-space:nowrap;font-size:clamp(1.3rem,5.4vw,4.2rem)}
.hero .lede{max-width:52ch}
.hero .cta{margin-bottom:32px}

/* Glossary: one card per term. */
.prose ul.glossary{list-style:none;padding:0;display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.prose ul.glossary li{margin:0;border:1px solid var(--border);border-radius:10px;padding:12px 14px;background:var(--card);display:grid;gap:4px;align-content:start}
.prose ul.glossary .g-term{font-family:var(--mono);font-size:.84rem;color:var(--accent)}
.prose ul.glossary .g-term code{color:var(--accent)}
.prose ul.glossary span{font-size:.88rem;color:var(--dim);line-height:1.5}

/* Home fits one screen: sponsors sit next to the button, hero and explorer are compact. */
.hero{padding:28px 0 22px}
.hero h1{font-size:clamp(1.3rem,4.6vw,3.4rem);margin-bottom:.22em}
.hero .lede{margin-bottom:1.1rem}
.hero .cta{margin-bottom:20px;align-items:center;gap:22px}
.sup{display:flex;align-items:center;gap:10px}
.sup span{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dimmer)}
.sup img{height:30px;width:auto;background:#fff;border-radius:7px;padding:4px 6px;box-sizing:content-box}
.hero .termbody{padding:12px 16px}
footer{padding:16px 0 20px}
footer .sup img{height:22px;padding:3px 5px}
@media (max-width:560px){
  .hero{padding:18px 0 12px}
  .hero .lede{font-size:.95rem;margin-bottom:.9rem}
  .hero .cta{margin-bottom:14px}
  footer{padding:12px 0 14px}
  footer .row{gap:8px 16px}
}
@media (max-width:560px){.hero .termbar{padding:7px 12px}}

/* Top bar: gradient wordmark, numbered track pills, icon buttons. */
nav{background:linear-gradient(180deg,var(--nav-bg),var(--nav-bg));box-shadow:0 1px 0 var(--accent-wash),0 10px 30px -20px rgba(0,0,0,.6)}
nav .wrap{height:62px}
.brand{gap:10px;font-size:1.05rem}
.brand img{width:28px;height:28px;border-radius:7px;box-shadow:0 0 0 1px var(--border),0 6px 16px -6px var(--accent)}
.brand .wm{background:linear-gradient(100deg,var(--accent) 0%,var(--accent2) 45%,var(--cool) 120%);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-weight:800;letter-spacing:.02em}
.brand .tag{font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);border:1px solid var(--border);border-radius:999px;padding:2px 7px;font-weight:600}
.nav-sections{gap:16px;padding:0;border:0;background:none}
.nav-sections a.link{display:flex;align-items:center;gap:8px;padding:7px 18px;border-radius:999px;border:1px solid var(--border);background:var(--panel);
  transition:color .15s ease,background .15s ease,border-color .15s ease}
.nav-sections a.link i{font-style:normal;font-size:.68rem;color:var(--dimmer);transition:color .15s ease}
.nav-sections a.link:hover{background:var(--accent-wash)}
.nav-sections a.link.on{color:var(--text);background:var(--accent-soft);border-color:var(--accent-line)}
.nav-sections a.link.on i,.nav-sections a.link:hover i{color:var(--accent)}
.icon-btn{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;border:1px solid var(--border);background:var(--panel);
  color:var(--dim);cursor:pointer;transition:color .15s ease,border-color .15s ease,transform .15s ease;padding:0}
.icon-btn:hover{color:var(--text);border-color:var(--accent-line);transform:translateY(-1px)}
@media (max-width:700px){
  .brand .tag{display:none}
  .nav-sections{gap:8px;padding:0}
  .nav-sections a.link{padding:5px 10px;gap:6px}
  nav .gh{display:inline-grid}
}
@media (max-width:420px){.nav-sections a.link i{display:none}}
footer a.sponsor{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--text);border:1px solid rgba(219,97,162,.5);
  background:rgba(219,97,162,.1);border-radius:999px;padding:4px 12px;font-family:var(--mono);font-size:.8rem;transition:background .15s ease,transform .15s ease}
footer a.sponsor svg{color:#db61a2}
footer a.sponsor:hover{background:rgba(219,97,162,.2);transform:translateY(-1px);color:var(--text)}
footer{padding:13px 0 16px}
.sup a{display:inline-flex;border-radius:7px;transition:transform .15s ease,box-shadow .15s ease}
.sup a:hover{transform:translateY(-1px);box-shadow:0 6px 16px -8px var(--accent)}

/* language menu */
.lang{position:relative}
.lang summary{list-style:none;cursor:pointer;font:600 .7rem/1 var(--mono);letter-spacing:.02em}
.lang summary::-webkit-details-marker{display:none}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:20;display:grid;min-width:140px;padding:6px;
  background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:var(--frame-shadow)}
.lang-menu a{padding:8px 10px;border-radius:6px;color:var(--dim);text-decoration:none;font-size:.9rem}
.lang-menu a:hover{background:var(--accent-soft);color:var(--text)}
.lang-menu a[aria-current]{color:var(--accent)}

/* CUDA track: global-id, block-limits, warp-lane, cuda-stack, vector-add, host-device-flow. */
.dg{--y:var(--warp);--v:var(--block)}
.dg .c0{--c:var(--accent)}.dg .c1{--c:var(--cool)}.dg .c2{--c:var(--y)}.dg .c3{--c:var(--v)}
.dg-btn.alt{background:var(--bg);color:var(--text);border:1px solid var(--border);font-weight:400}
.dg-btn.alt:hover:not(:disabled){border-color:var(--accent)}
.dg button:focus-visible,.dg input:focus-visible{outline:2px solid var(--cool);outline-offset:2px}
.dg-code{margin:0 0 12px;padding:10px 14px;font-family:var(--mono);font-size:.78rem;line-height:1.6;background:var(--bg);border:1px solid var(--border);
  border-radius:10px;overflow-x:auto;white-space:pre;color:var(--text)}
.dg-code .fn{color:var(--y)}.dg-code .k{color:var(--cool)}
.dg-eq{display:flex;flex-wrap:wrap;align-items:flex-end;gap:6px 10px;margin-top:16px;font-size:.8rem}
.dg-eq>span{display:flex;flex-direction:column;align-items:center;border:1px solid var(--border);border-radius:10px;padding:6px 10px;background:var(--bg2);min-width:4.4em}
.dg-eq small{font-size:.66rem;color:var(--dim)}
.dg-eq b{font-size:1.5rem;line-height:1.2;letter-spacing:-.02em}
.dg-eq>i{font-style:normal;font-size:1.2rem;color:var(--dimmer);padding-bottom:8px}
.dg-eq .e1 b,.dg .e1{color:var(--block)}.dg-eq .e2 b,.dg .e2{color:var(--y)}.dg-eq .e3 b,.dg .e3{color:var(--accent)}
.dg-eq .e4{border-color:var(--accent);background:var(--accent-soft)}
.dg-eq b,.wl-eq b{animation:pop .35s ease-out}

.gi-grid{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));margin:12px 0 16px}
.gi-blk{border:1px solid var(--border);border-top:3px solid var(--c);border-radius:10px;padding:8px;background:var(--bg2)}
.gi-th{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
.gi-th button,.gi-flat button{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--border);border-radius:6px;cursor:pointer;
  transition:background .15s ease,border-color .15s ease,transform .15s ease}
.gi-th button{padding:6px 0;font-size:.9rem;display:flex;flex-direction:column;align-items:center}
.gi-flat{display:grid;grid-template-columns:repeat(auto-fill,minmax(30px,1fr));gap:3px}
.gi-flat button{padding:5px 0;font-size:.74rem;border-bottom:3px solid var(--c)}
.gi-flat button.mine{background:var(--accent-wash)}
.gi-th button.hot,.gi-flat button.hot{background:var(--c);border-color:var(--c);color:var(--on-accent);transform:translateY(-2px);font-weight:700}

.bl-in{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:10px;margin-bottom:12px}
.bl-in fieldset{border:1px solid var(--border);border-radius:10px;padding:8px 10px 10px;margin:0;display:flex;flex-wrap:wrap;gap:8px 12px;background:var(--bg2);min-width:0}
.bl-in legend{font-size:.74rem;color:var(--dim);padding:0 4px}
.bl-in label{display:flex;align-items:center;gap:6px;color:var(--dim)}
.bl-in input{font:inherit;width:8.5ch;padding:4px 6px;border-radius:6px;border:1px solid var(--border);background:var(--panel);color:var(--text)}
.dg .bl-code{display:block;margin-bottom:12px;line-height:1.6;background:none;border:0;padding:0}
.bl-code .fn{color:var(--y)}
.bl-meter{display:grid;gap:4px;margin-bottom:12px;font-size:.76rem;color:var(--dim)}
.bl-meter .bar{height:10px;border-radius:5px;background:var(--bg);border:1px solid var(--border);overflow:hidden}
.bl-meter i{display:block;height:100%;background:linear-gradient(90deg,var(--accent-line),var(--accent));transition:width .3s ease}
.bl-meter.over i{background:var(--danger)}
.bl-meter b{color:var(--text)}
.bl-checks{list-style:none;margin:0;padding:0;display:grid;gap:4px;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr))}
.bl-checks li{display:grid;grid-template-columns:1.2em 9.5em minmax(0,1fr);align-items:baseline;gap:6px;margin:0;padding:5px 9px;border-radius:7px;
  border:1px solid var(--border);font-size:.76rem;overflow-wrap:anywhere}
.bl-checks li.ok span{color:var(--accent)}
.bl-checks li.no{border-color:var(--danger);background:var(--danger-soft)}
.bl-checks li.no span,.bl-checks li.no b{color:var(--danger)}
.bl-checks b{font-weight:400}.bl-checks b b{font-weight:700}
.dg .bl-checks code{background:none;border:0;padding:0;color:var(--dim)}

.wl{display:grid;gap:3px;overflow:hidden}
.wl-row{display:grid;grid-template-columns:4.8em minmax(0,1fr);gap:6px;align-items:center;font-size:.7rem;color:var(--dimmer);border-radius:5px}
.wl-row.on{color:var(--text)}
.wl-row.on .wl-cells{outline:1px solid var(--dimmer);outline-offset:2px;border-radius:2px}
.wl-cells{display:grid;grid-template-columns:repeat(32,minmax(0,1fr));gap:1px}
.wl-cells i{aspect-ratio:1;border-radius:1.5px;background:var(--border);opacity:.3;cursor:crosshair;transition:opacity .15s ease}
.wl-cells i.a{opacity:.55}
.wl-cells i.w0{background:var(--accent)}.wl-cells i.w1{background:var(--cool)}.wl-cells i.w2{background:var(--y)}.wl-cells i.w3{background:var(--v)}
.wl-row.on i.a,.wl-cells i.a.col{opacity:1}
.wl-cells i.idle{background:none;border:1px dashed var(--border);opacity:.7;cursor:default}
.wl-cells i.hot{outline:2px solid var(--text);outline-offset:1px;position:relative;z-index:1;animation:pop .35s ease-out}
.wl-row.lanes i{aspect-ratio:auto;background:none;opacity:1;font-style:normal;font-size:.56rem;text-align:center;overflow:visible;white-space:nowrap;cursor:default}
.wl-row.lanes i.col{color:var(--accent);font-weight:700}
.wl-eq{flex-direction:column;align-items:flex-start;gap:4px;font-size:.84rem}
.wl-eq b{font-size:1.15rem}
.wl-row>span{white-space:nowrap}
@media (max-width:420px){.wl-row{grid-template-columns:4.4em minmax(0,1fr);font-size:.6rem}}

.cs{display:grid;gap:6px}
.cs-layer{display:grid;grid-template-columns:190px minmax(0,1fr);gap:8px;border:1px solid var(--border);border-left:3px solid var(--c);border-radius:10px;padding:8px;
  background:var(--bg2);transition:border-color .2s ease,background .2s ease}
.cs-layer.l0{--c:var(--accent)}.cs-layer.l1{--c:var(--v)}.cs-layer.l2{--c:var(--y)}.cs-layer.l3{--c:var(--cool)}.cs-layer.l4{--c:var(--danger)}
.cs-layer.cur{border-color:var(--c);background:var(--accent-wash)}
.cs-layer button{text-align:left;display:flex;flex-direction:column;gap:1px;min-width:0}
.cs-layer button b{color:var(--text);font-size:.8rem}
.cs-layer button small{color:var(--dimmer);font-size:.66rem;line-height:1.35}
.dg .cs-name{border-color:transparent;background:none}
.dg .cs-name b{color:var(--c);font-size:.84rem}
.cs-items{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:5px}
.dg .cs-layer [data-k].on{border-color:var(--c)}
@media (max-width:640px){.cs-layer{grid-template-columns:1fr}}

.va{display:grid;gap:3px;margin-bottom:6px}
.va-row{display:grid;grid-template-columns:1.6em repeat(var(--n),minmax(0,1fr));gap:2px;align-items:center}
.va-row span{color:var(--dim);font-size:.76rem}
.va-row i{font-style:normal;text-align:center;font-size:.72rem;padding:5px 0;border-radius:4px;border:1px solid var(--border);background:var(--bg);
  min-height:2.1em;transition:background .2s ease,border-color .2s ease,color .2s ease}
.va-row.i i{border-color:transparent;background:none;color:var(--dimmer);font-size:.62rem;padding:2px 0;min-height:0}
.va-row.c i{border-style:dashed}
.va-row.a i.now,.va-row.b i.now{border-color:var(--cool);background:var(--host-soft)}
.va-row.c i.on{border-style:solid;border-color:var(--accent);background:var(--accent-soft);color:var(--text);font-weight:700}
.va-row.c i.now{animation:pop .35s ease-out}
.va-row.i i.now{color:var(--host)}
.va.gpu .va-row.i i{color:var(--device)}
.va.gpu .va-row.i i::before{content:"";display:block;width:6px;height:6px;margin:0 auto 2px;border-radius:50%;background:var(--device);opacity:.4}
.va.gpu .va-row.i i.now::before{opacity:1;box-shadow:0 0 6px var(--device)}
@media (max-width:420px){.va-row i{font-size:.58rem}.va-row{gap:1px}}

.hd{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:10px;align-items:stretch;margin-bottom:12px}
.hd-side{border:1px dashed var(--border);border-radius:12px;padding:10px;display:grid;gap:6px;align-content:start}
.hd-side.d{border-color:var(--accent-line);background:var(--accent-wash)}
.hd-arr{display:grid;grid-template-columns:2.6em minmax(0,1fr);gap:6px;align-items:center;transition:opacity .3s ease}
.dg .hd-arr code{font-size:.74rem;background:none;border:0;padding:0;color:var(--text)}
.hd-arr div{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:2px}
.hd-arr i{font-style:normal;text-align:center;font-size:.68rem;padding:4px 0;border-radius:4px;border:1px solid var(--border);background:var(--bg);color:var(--dimmer);min-height:1.9em}
.hd-arr i.v{color:var(--text);border-color:var(--cool-line)}
.hd-side.d .hd-arr i.v{border-color:var(--accent-line)}
.hd-arr.new i.v{animation:pop .4s ease-out both;animation-delay:calc(var(--i) * 45ms);border-color:var(--accent);background:var(--accent-soft)}
.hd-arr.gone{opacity:.3}
.hd-arr.gone i{border-style:dashed;background:none}
.hd-link{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:.66rem;color:var(--dimmer);min-width:3.4em}
.hd-link b{display:block;width:100%;height:2px;border-radius:1px;background:var(--border);position:relative;overflow:hidden}
.hd[data-s="2"] .hd-link b,.hd[data-s="4"] .hd-link b{background:var(--accent-line)}
.hd[data-s="2"] .hd-link b::after,.hd[data-s="4"] .hd-link b::after{content:"";position:absolute;top:0;width:40%;height:100%;background:var(--accent);animation:hd-r 1s linear infinite}
.hd[data-s="4"] .hd-link b::after{animation-name:hd-l}
.hd[data-s="2"] .hd-link span::after{content:" →";color:var(--accent)}
.hd[data-s="4"] .hd-link span::after{content:" ←";color:var(--accent)}
@keyframes hd-r{from{left:-40%}to{left:100%}}
@keyframes hd-l{from{left:100%}to{left:-40%}}
.hd-kernel{margin-top:4px;text-align:center;font-size:.72rem;padding:6px;border-radius:8px;border:1px dashed var(--border);color:var(--dimmer);transition:all .3s ease}
.hd[data-s="3"] .hd-kernel{border-style:solid;border-color:var(--accent);color:var(--text);background:var(--accent-soft);box-shadow:0 0 14px -4px var(--accent)}
.hd[data-s="5"] .hd-kernel{opacity:.3}
@media (max-width:560px){
  .hd{grid-template-columns:minmax(0,1fr)}
  .hd-link{flex-direction:row;min-height:1.6em}
  .hd-link b{width:2px;height:22px;flex:none}
  .hd-link b::after{display:none}
  .hd[data-s="2"] .hd-link span::after{content:" ↓"}
  .hd[data-s="4"] .hd-link span::after{content:" ↑"}
}
@media (prefers-reduced-motion: reduce){.hd-link b::after{display:none}}

/* grid-size: the last block lane by lane, and the SMs as squares that fill with the warps they hold. */
.gs-lb,.gs-sl{margin-top:14px}
.gs-cells{display:grid;grid-template-columns:repeat(var(--n,32),minmax(0,1fr));gap:1px}
.gs-cells i{aspect-ratio:1;border-radius:1px}
.gs-cells i.a{background:var(--accent)}
.dg .gs-x{background:var(--danger);opacity:.75}
.dg .gs-idle{background:none;border:1px dashed var(--dimmer)}
.gs-sms{display:grid;grid-template-columns:repeat(24,minmax(0,1fr));gap:2px}
.gs-sms i{aspect-ratio:1;border-radius:2px;border:1px solid var(--border);background:var(--bg)}
.dg .gs-on{border:1px solid var(--accent);background:linear-gradient(to top,var(--accent) calc(var(--f,1) * 100%),var(--accent-soft) 0)}
.gs-sms i.gs-on{animation:pop .35s ease-out}
.gs-use{min-height:0}

/* event-timing: a CPU lane and a GPU lane on one relative time axis. */
.et{display:grid;gap:6px;margin-bottom:6px}
.et-lane{display:grid;grid-template-columns:2.8em minmax(0,1fr);gap:8px;align-items:center}
.et-lane>span{font-size:.74rem;color:var(--dim)}
.et-ax{justify-self:end}
.et-tr{position:relative;height:30px;border-radius:6px;background:var(--bg);border:1px solid var(--border)}
.et-tr.gpu{height:56px}
.et-tr i{position:absolute;top:6px;bottom:6px;border-radius:3px;overflow:hidden;font-style:normal;opacity:.6;transition:opacity .25s ease}
.et-tr i.cur{opacity:1;animation:et-in .4s ease-out}
.et-tr i.later{visibility:hidden}
@keyframes et-in{from{opacity:0}}
.et-tr b{display:block;font-weight:400;font-size:.62rem;line-height:1;padding:0 3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.et-tr i.go{background:var(--cool);border-right:1px solid var(--bg)}
.et-tr i.wait,.dg-legend i.et-w{background:repeating-linear-gradient(135deg,color-mix(in srgb,var(--cool) 28%,transparent) 0 5px,transparent 5px 10px);border:1px solid var(--cool-line)}
.et-tr i.wait b{line-height:16px;color:var(--text)}
.et-tr i.rd{background:var(--accent)}
.et-tr i.k{top:18px;bottom:16px;background:var(--accent);border-right:1px solid var(--bg);color:var(--on-accent)}
.et-tr i.k b{line-height:20px;text-align:center}
.et-tr i.k.slow{background:var(--y)}
.et-tr i.mark{top:2px;bottom:14px;width:2px!important;margin-left:-1px;background:var(--text);overflow:visible;border-radius:1px}
.et-tr i.mark b{position:absolute;top:0;left:5px;padding:0;color:var(--text)}
.et-tr i.mark.r b{left:auto;right:5px}
.et-tr i.span{top:auto;bottom:3px;height:9px;border:2px solid var(--accent);border-top:0;border-radius:0 0 4px 4px;overflow:visible;background:none}
.et-tr i.span b{position:absolute;left:50%;top:-3px;transform:translateX(-50%);padding:0 4px;background:var(--bg);color:var(--accent);font-weight:700}
.et-tr i.now{top:-4px;bottom:-4px;width:0!important;border-left:2px dashed var(--accent);border-radius:0;overflow:visible}
.et-tr i.rd.bad{background:var(--danger)}
.et-tr i.span.bad{border-color:var(--danger);border-style:dashed;border-top:0}
.et-tr i.span.bad b{color:var(--danger)}
.et-tr i.now.bad{border-left-color:var(--danger)}
.et-tg button.on{border-color:var(--danger);background:var(--danger-soft)}
.et-code>span{display:block;margin:0 -8px;padding:0 8px;border-radius:4px;transition:opacity .2s ease}
.et-code .dim{opacity:.45}
.et-code .on{background:var(--accent-soft)}
.et-code .off{opacity:.45;text-decoration:line-through;text-decoration-color:var(--danger)}

/* Code walkthrough: a copy of the code above, stepped through in writing order. CPU steps are blue, GPU steps green. */
.cw{--cw:var(--cool)}
.cw .cw-hint{margin:-6px 0 12px}
.prose .cw .cw-code{margin:0 0 12px}
.prose .cw .cw-code pre{position:relative;max-height:min(62vh,30em);overflow:auto;padding:40px 0 12px;scroll-behavior:smooth;overscroll-behavior:contain}
.cw-code code{display:inline-block;min-width:100%}
.cw-l{display:block;padding:0 18px 0 0;border-left:3px solid transparent;cursor:pointer;transition:opacity .2s ease,background .2s ease,border-color .2s ease}
.cw-l::before{content:attr(data-n);display:inline-block;width:2.6em;padding-right:1.1em;text-align:right;color:var(--dimmer);user-select:none;-webkit-user-select:none}
.cw-l.blank{cursor:default}
.cw-l.gpu{--cw:var(--accent)}.cw-l.cpu{--cw:var(--cool)}
.cw-l:hover:not(.blank){background:var(--accent-wash)}
.cw-l.on{border-left-color:var(--cw);background:color-mix(in srgb,var(--cw) 10%,transparent)}
.cw-l.on::before{color:var(--cw);font-weight:700}
.cw-l.dim{opacity:.38}
.cw.writing .cw-l.dim{opacity:.72}
.cw-l.new{animation:cw-in .4s ease-out}
@keyframes cw-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.cw-step{border-left:2px solid var(--accent);padding:4px 0 4px 14px;min-height:6.5em;font-family:var(--sans);font-size:.95rem;line-height:1.6;color:var(--dim)}
.cw-step:has(.cw-badge.cpu){border-left-color:var(--cool)}
.cw-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;margin-bottom:6px;font-family:var(--mono);font-size:.74rem;color:var(--dim)}
.cw-badge{font-weight:700;font-size:.7rem;letter-spacing:.08em;border-radius:999px;padding:2px 9px;border:1px solid var(--accent-line);background:var(--accent-soft);color:var(--accent)}
.cw-badge.cpu{border-color:var(--cool-line);background:var(--host-soft);color:var(--cool)}
.cw-ln{margin-left:auto;color:var(--dimmer)}
.cw-text strong,.cw-text b{color:var(--text)}
.cw-text p{margin:0 0 .5em}.cw-text p:last-child{margin:0}
.cw-nav{margin:0 0 12px}
.cw-dots{display:flex;flex-wrap:wrap;gap:5px;flex:1;justify-content:center}
.cw-dots button{width:10px;height:10px;padding:0;border-radius:5px;border:1px solid var(--accent-line);background:none;cursor:pointer;transition:width .2s ease,background .2s ease}
.cw-dots button.cpu{border-color:var(--cool-line)}
.cw-dots button.done{background:var(--accent-line)}
.cw-dots button.cpu.done{background:var(--cool-line)}
.cw-dots button.on{width:22px;background:var(--accent);border-color:var(--accent)}
.cw-dots button.cpu.on{background:var(--cool);border-color:var(--cool)}
@media (max-width:560px){
  .prose .cw{padding:14px 12px}
  .cw-nav .dg-ctl{width:100%;justify-content:space-between}
  .cw-dots{order:3;justify-content:flex-start}
  .cw-nav .pos{order:4}
  .prose .cw .cw-code pre{font-size:.78rem}
  .cw-l::before{width:2.2em;padding-right:.8em}
}
@media (prefers-reduced-motion: reduce){.prose .cw .cw-code pre{scroll-behavior:auto}}

/* Collapsible Hint and Solution blocks (??? tip / ??? note), the same family as the callouts:
   Hint is green like the Hint callout, Solution is cyan like a Note. */
.prose details{--co:var(--cool);border:1px solid color-mix(in srgb,var(--co) 26%,transparent);border-left:3px solid var(--co);border-radius:12px;
  background:linear-gradient(100deg,color-mix(in srgb,var(--co) 9%,transparent),color-mix(in srgb,var(--co) 2%,transparent));
  margin:1.2em 0;font-size:1rem;padding:0 18px;max-width:100%}
.prose details.tip{--co:var(--accent)}
.prose details>summary{display:flex;align-items:center;gap:10px;padding:12px 18px;margin:0 -18px;cursor:pointer;list-style:none;font-family:var(--head);font-weight:700;font-size:.8rem;
  letter-spacing:.12em;text-transform:uppercase;color:var(--co);border-radius:10px;transition:background .15s ease}
.prose details>summary::-webkit-details-marker{display:none}
.prose details>summary::before{content:"+";flex:none;display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;
  background:color-mix(in srgb,var(--co) 16%,transparent);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--co) 50%,transparent);
  color:var(--co);font-family:var(--mono);font-size:.95rem;font-weight:700;letter-spacing:0;line-height:1;transition:transform .2s ease}
.prose details[open]>summary::before{transform:rotate(45deg)}
.prose details>summary:hover{background:color-mix(in srgb,var(--co) 8%,transparent)}
.prose details>summary:focus-visible{outline:2px solid var(--co);outline-offset:2px}
.prose details[open]>summary{border-bottom:1px solid var(--divider);border-radius:10px 10px 0 0;margin-bottom:14px}
.prose details[open]{padding-bottom:4px}


/* Left-anchored page: the hero keeps a readable width, the rest starts at the left gutter. */
.hero .wrap>*{max-width:1100px}
@media (min-width:701px){
  .nav-sections{justify-self:start}
  footer .row{justify-content:flex-start;column-gap:32px}
}
@media (min-width:901px){nav .wrap{grid-template-columns:230px 1fr auto;column-gap:48px}}

/* Right rail (wide screens): glossary terms of the section in view. */
.rail{display:none}
@media (min-width:1280px){
  .doc{grid-template-columns:230px minmax(0,1fr) minmax(230px,290px)}
  .rail{display:block}
}
.rail-in{position:sticky;top:78px;max-height:calc(100vh - 100px);overflow:auto;padding-bottom:12px}
.rail-h{display:block;font-family:var(--head);font-weight:600;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--dim)}
.rail-s{margin:.2em 0 12px;font-size:.8rem;color:var(--dimmer);line-height:1.45}
.rail ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.rail li{margin:0;border:1px solid var(--border);border-left:2px solid var(--accent-line);border-radius:10px;padding:10px 12px;background:var(--card);
  display:grid;gap:3px;font-family:var(--mono);overflow-wrap:anywhere}
.rail .g-term{font-size:.8rem;color:var(--accent)}
.rail .g-term code{color:var(--accent);font-size:1em}
.rail li span{font-size:.78rem;color:var(--dim);line-height:1.5}
.rail li span code{font-size:.92em}
@media (prefers-reduced-motion: no-preference){
  .rail li{animation:rail-in .35s ease both;animation-delay:calc(var(--i) * 45ms)}
}
@keyframes rail-in{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:none}}

:root{--g:clamp(20px,2.4vw,40px)}
/* Lesson pages: the outer margins and the gaps between the columns are always the same size.
   Fixed column widths, and justify-content spreads the free space evenly over all of them. */
@media (min-width:701px){
  .doc{padding-inline:var(--g);column-gap:var(--g);justify-content:space-evenly;
    grid-template-columns:230px minmax(0,760px)}
}
@media (min-width:1280px){
  .doc{grid-template-columns:230px minmax(0,760px) 290px}
}

/* Home page keeps the classic centered layout. */
.home .wrap{max-width:1100px;margin-inline:auto;padding-inline:clamp(16px,3vw,40px)}
.home .hero .wrap>*{max-width:none}
@media (min-width:701px){
  .home .nav-sections{justify-self:center}
  .home footer .row{justify-content:space-between}
}
@media (min-width:901px){.home nav .wrap{grid-template-columns:auto 1fr auto;column-gap:20px}}
@media (min-width:1280px){
  body:not(.home) nav .wrap{padding-inline:var(--g);column-gap:var(--g);justify-content:space-evenly;
    grid-template-columns:230px minmax(0,760px) 290px}
  body:not(.home) .nav-right{justify-self:end}
}

.rail li.again{border-left-color:var(--border);opacity:.82}


/* Home: 16 CPU cores next to the 142 SMs of the L40S (128 CUDA cores each, 18,176 in total). */
.cores-fig{display:grid;grid-template-columns:minmax(150px,220px) auto minmax(0,1fr);align-items:center;gap:28px;margin:40px 0 0;
  padding:28px;border:1px solid var(--border);border-radius:16px;background:var(--panel)}
.cf{display:grid;gap:12px}
.cf-t{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}
.cf-cpu .cf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.cf-cpu .cf-grid i{aspect-ratio:1;border-radius:6px;border:1px solid var(--cool-line);background:color-mix(in srgb,var(--cool) 22%,transparent)}
.cf-gpu .cf-grid{display:grid;grid-template-columns:repeat(18,1fr);gap:3px}
.cf-gpu .cf-grid i{aspect-ratio:2/1;border-radius:2px;border:1px solid var(--accent-line);
  background:color-mix(in srgb,var(--accent) 38%,transparent);box-shadow:0 0 6px -2px var(--accent)}
.cf-n{margin:0;font-size:.82rem;color:var(--dim)}
.cf-n b{font-size:1.5rem;color:var(--text);margin-right:6px}
.cf-cpu .cf-n b{color:var(--cool)}.cf-gpu .cf-n b{color:var(--accent)}
.cf-vs{font-size:.8rem;color:var(--dimmer)}
.cores-fig figcaption{grid-column:1/-1;font-size:.95rem;color:var(--text);border-top:1px solid var(--divider);padding-top:16px}
@media (max-width:760px){
  .cores-fig{grid-template-columns:1fr;gap:18px;padding:20px}
  .cf-cpu{max-width:220px}
  .cf-vs{display:none}
  .cf-gpu .cf-grid{grid-template-columns:repeat(12,1fr);gap:2px}
}

/* Home: a little more air above the title. */
.home .hero{padding-top:clamp(64px,8vw,120px)}
@media (max-width:700px){.home .hero{padding-top:40px}}
/* data-path */
/* <data-path>: one bar per link, length = transfer time. */
.dp-big{margin:12px 0 10px}
.dp-big span{margin-left:6px}
.dp-bars{display:grid;gap:8px}
.dp-row{display:grid;grid-template-columns:minmax(0,11.5em) minmax(0,1fr) 5.2em;gap:10px;align-items:center;color:var(--dim);font-size:.76rem}
.dp-name{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.dp-name small{font-size:.66rem;color:var(--dimmer);overflow-wrap:anywhere}
.dp-track{height:14px;border-radius:4px;background:var(--bg);border:1px solid var(--border);overflow:hidden}
.dp-track i{display:block;height:100%;width:0;min-width:2px;background:color-mix(in srgb,var(--host) 32%,transparent);border-right:2px solid var(--host);transition-property:width;transition-timing-function:linear}
.dp-t{text-align:right;color:var(--dim);font-weight:400;white-space:nowrap}
.dp-row.on{color:var(--text)}
.dp-row.on .dp-track i{background:color-mix(in srgb,var(--accent) 38%,transparent);border-right-color:var(--accent)}
.dp-row.on .dp-t{color:var(--text);font-weight:700}
@media (max-width:520px){
  .dp-row{grid-template-columns:minmax(0,1fr) 5.2em;row-gap:4px}
  .dp-name{grid-column:1 / -1}
}
@media (prefers-reduced-motion: reduce){.dp-track i{transition:none}}
/* latency-hiding */
latency-hiding .dg-note{margin:0 0 12px}
.lh-grid{display:grid;gap:3px}
.lh-grid div{display:grid;grid-template-columns:58px repeat(30,minmax(0,1fr));gap:2px;align-items:center;font-size:.72rem;color:var(--dim)}
.lh-grid i{height:16px;border-radius:2px;background:var(--bg);border:1px solid var(--divider);transition:opacity .15s ease}
.lh-grid i.C,.dg-legend i.C{background:var(--accent);border-color:transparent}
.lh-grid i.W{background:color-mix(in srgb,var(--danger) 40%,transparent);border-color:transparent}
.lh-grid i.lh-r,.dg-legend i.lh-r{background:color-mix(in srgb,var(--warp) 35%,transparent);border-color:transparent}
.lh-grid i.lh-idle,.dg-legend i.lh-idle{background:transparent;border:1px dashed var(--dimmer)}
.lh-grid .lh-s{margin-top:6px;padding-top:6px;border-top:1px solid var(--divider);color:var(--text);font-weight:700}
.lh-meter{display:flex;align-items:center;gap:12px;margin-top:12px;font-size:.78rem;color:var(--dim)}
.lh-meter div{flex:1;height:10px;border-radius:5px;background:var(--bg);border:1px solid var(--divider);overflow:hidden}
.lh-meter i{display:block;height:100%;background:var(--accent);transition:width .3s ease}
.lh-meter b{color:var(--text);min-width:3.2em;text-align:right}
@media (max-width:560px){.lh-grid div{grid-template-columns:48px repeat(30,minmax(0,1fr));gap:1px}.lh-grid i{height:14px}}
@media (prefers-reduced-motion: reduce){.lh-grid i,.lh-meter i{transition:none}}
/* mem-hierarchy */
/* <mem-hierarchy>: stacked pyramid of memory levels. Each level's width hints at its size, its edge color at who owns it. */
.mh-pyr{display:flex;flex-direction:column;align-items:center;gap:6px}
.dg .mh-pyr > button{width:var(--w);min-width:min(100%,150px);text-align:center;padding:10px 8px;border-left:4px solid var(--c)}
.dg .mh-pyr > button.on{border-left-color:var(--c)}
.mh-ax{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dimmer)}
.mh-pyr .dg-lbl{margin:10px 0 0}
.mh-side{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;width:100%}
.dg .mh-side button{border-style:dashed;border-left:4px solid var(--c)}
.dg .mh-side button.on{border-left-color:var(--c)}
.mh-scope{margin:8px 0}
.mh-scope span{color:var(--dimmer)}
.mh-scope span.on{color:var(--text);border-color:var(--accent);background:var(--accent-soft)}
.mh-bar{margin:6px 0 4px;max-width:420px}
.mh-src{display:block;color:var(--dimmer);font-size:.72rem}
/* multi-gpu */
multi-gpu{--mg-pcie:var(--cool);--mg-nvl:var(--accent);--mg-net:var(--amber)}
.mg-stage{display:flex;justify-content:center;align-items:center;min-height:190px;padding:14px 8px;border:1px solid var(--border);border-radius:12px;background:var(--bg2);overflow:hidden}
.mg-pcie{color:var(--mg-pcie)}.mg-nvl{color:var(--mg-nvl)}.mg-net{color:var(--mg-net)}
.mg-g{display:block;width:22px;height:22px;border-radius:4px;background:var(--accent-soft);border:1.5px solid var(--device);position:relative}
.mg-box{display:flex;flex-direction:column;align-items:center;justify-content:center;width:96px;height:56px;border-radius:8px;font-weight:700;border:1.5px solid var(--host);background:var(--host-soft)}
.mg-box.gpu{border-color:var(--device);background:var(--accent-soft)}
.mg-box small{font-weight:400;font-size:.7rem;color:var(--dim)}
.mg-one{display:flex;flex-direction:column;align-items:center}
.mg-link.v{width:4px;height:52px;border-radius:2px;background:var(--mg-pcie);position:relative}
.mg-link.v span{position:absolute;left:12px;top:50%;transform:translateY(-50%);font-size:.72rem;color:var(--mg-pcie)}
.mg-srv,.mg-rack,.mg-clu{display:flex;flex-direction:column;align-items:center;gap:0;width:100%;max-width:420px}
.mg-row{display:flex;justify-content:space-around;width:100%}
.mg-g.up,.mg-g.dn{width:40px;height:30px}
.mg-g.up::after,.mg-g.dn::after{content:"";position:absolute;left:50%;width:4px;margin-left:-2px;height:24px;background:var(--mg-nvl)}
.mg-g.up{margin-bottom:24px}.mg-g.up::after{top:100%}
.mg-g.dn{margin-top:24px}.mg-g.dn::after{bottom:100%}
.mg-sw{width:100%;text-align:center;padding:6px 8px;border-radius:6px;font-size:.74rem;font-weight:700;color:var(--on-accent);background:var(--mg-nvl)}
.mg-sw.net{background:var(--mg-net);color:#1a1200;margin-top:22px;position:relative}
.mg-rack .mg-sw{margin:6px 0}
.mg-rack .dg-lbl{margin:4px 0}
.mg-trays{display:flex;gap:4px;justify-content:center;flex-wrap:wrap}
.mg-tray{display:flex;flex-direction:column;gap:2px;padding:3px;border:1px solid var(--border);border-radius:4px;background:var(--panel)}
.mg-tray .mg-g{width:16px;height:9px;border-width:1px;border-radius:2px}
.mg-racks{display:flex;gap:8px;justify-content:center;align-items:stretch;width:100%}
.mg-mini{display:flex;flex-direction:column;align-items:center;gap:4px;padding:5px;border:1px solid var(--accent-line);border-radius:6px;background:var(--panel);position:relative}
.mg-mini b{font-size:.66rem;color:var(--dim)}
.mg-mini span{display:grid;grid-template-columns:repeat(8,5px);gap:1px}
.mg-mini .mg-g{width:5px;height:5px;border-width:0;border-radius:1px;background:var(--device)}
.mg-mini::after{content:"";position:absolute;left:50%;top:100%;width:3px;margin-left:-1.5px;height:23px;background:var(--mg-net)}
.mg-more{align-self:center;color:var(--dimmer);font-size:1.1rem}
.mg-bl{margin:16px 0 8px}
.mg-bars div{opacity:.55;transition:opacity .2s ease}
.mg-bars div.on{opacity:1}.mg-bars div.on span{color:var(--text)}
.mg-bars i{min-width:4px}
.mg-bars i.pcie{background:var(--mg-pcie)}.mg-bars i.nvl{background:var(--mg-nvl)}.mg-bars i.net{background:var(--mg-net)}
html[data-mode="light"] .mg-sw.net{color:#fff}
@media (max-width:480px){.mg-bars div{grid-template-columns:96px 1fr auto;font-size:.7rem}.mg-racks{gap:5px}.mg-mini span{grid-template-columns:repeat(6,4px)}.mg-mini .mg-g{width:4px;height:4px}.mg-tray .mg-g{width:11px;height:8px}.mg-trays{gap:3px}}
@media (prefers-reduced-motion: no-preference){
  .mg-link.v,.mg-g.up::after,.mg-g.dn::after,.mg-mini::after{animation:mg-pulse 1.8s ease-in-out infinite}
  @keyframes mg-pulse{50%{opacity:.45}}
}
@media (prefers-reduced-motion: reduce){.mg-bars div{transition:none}}
/* num-formats */
/* <num-formats>: bit cells colored by role (sign amber, exponent cyan, mantissa green, integer or scale violet). */
.nf-ctl{align-items:center;margin-bottom:12px}
.nf-ctl input[type=text]{font:inherit;font-size:.82rem;width:120px;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:5px 9px;accent-color:auto}
.nf-ctl input[aria-invalid=true]{border-color:var(--danger)}
.nf-pre{display:flex;flex-wrap:wrap;gap:6px}
.nf-bits{display:grid;grid-template-columns:repeat(var(--n,16),minmax(0,1fr));gap:2px;max-width:640px}
.nf-bits i{font-style:normal;text-align:center;font-size:.72rem;line-height:24px;height:24px;border-radius:3px;color:var(--on-accent);font-weight:700}
.nf-bits.many i{font-size:0;height:16px}
.nf-s{background:var(--warp)}.nf-e{background:var(--cool)}.nf-m{background:var(--accent)}.nf-i,.nf-k{background:var(--block)}
.nf-gap{margin-left:6px}
.nf-out{margin:14px 0 10px;width:100%}
.nf-out td{overflow-wrap:anywhere;color:var(--dim)}
.nf-out td b{color:var(--text)}
.nf-out th{white-space:nowrap}
.nf-raw{font-size:.76rem;white-space:normal;word-break:break-all}
.nf-warn{color:var(--danger)}
.nf-stats{margin:0}
@media (prefers-reduced-motion: no-preference){.nf-bits i{transition:background .15s ease}}
/* roofline-chart */
.rf-svg{display:block;width:100%;max-width:540px;height:auto;margin:0 auto 12px;font-family:var(--mono);overflow:visible}
.rf-grid{stroke:var(--divider);stroke-width:1}
.rf-tick{fill:var(--dimmer);font-size:10.5px}
.rf-axis{fill:var(--dim);font-size:11px}
.rf-mem,.rf-cmp{fill:none;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}
.rf-mem{stroke:var(--cool)}
.rf-cmp{stroke:var(--accent)}
.rf-ridge{stroke:var(--dimmer);stroke-width:1;stroke-dasharray:3 3}
.rf-rl{fill:var(--dim);font-size:10.5px}
.rf-dot circle{stroke:var(--panel);stroke-width:2}
.rf-dot.mem circle{fill:var(--cool)}
.rf-dot.cmp circle{fill:var(--accent)}
.rf-dot{transition:transform .35s ease}
.dg-tabs.rf-ks{margin:0}
.dg-info code{font-size:.78rem;color:var(--warp)}
@media (prefers-reduced-motion: reduce){.rf-dot{transition:none}}
/* cpu-gpu-trip */
.hdf-row{display:grid;grid-template-columns:1fr minmax(70px,.7fr) 1fr;gap:10px;align-items:center}
.hdf-box{display:flex;flex-direction:column;gap:6px;border:1px dashed var(--border);border-radius:12px;padding:10px}
.hdf-box b{font-size:.9rem}.hdf-box span{color:var(--dimmer);font-size:.72rem}
.hdf-host{border-color:var(--cool-line)}.hdf-host b{color:var(--host)}
.hdf-dev{border-color:var(--accent-line);background:var(--accent-wash)}.hdf-dev b{color:var(--device)}
.hdf-mem{display:grid;grid-template-columns:repeat(8,1fr);gap:3px}
.hdf-mem i,.hdf-sms i{display:block;height:14px;border-radius:3px;background:var(--panel2);border:1px solid var(--border);transition:background .4s,border-color .4s}
.hdf-sms{display:grid;grid-template-columns:repeat(8,1fr);gap:3px}
.hdf-link{text-align:center;color:var(--dim);font-size:.72rem}
.hdf-lane{position:relative;height:10px;margin-top:6px;border-radius:5px;background:var(--panel2);border:1px solid var(--border);overflow:hidden}
.hdf-lane i{position:absolute;top:1px;width:12px;height:6px;border-radius:2px;opacity:0}
.cgt[data-step="0"] .hdf-ram i,.cgt[data-step="1"] .hdf-ram i,.cgt[data-step="1"] .hdf-vram i,.cgt[data-step="2"] .hdf-ram i{background:var(--host);border-color:var(--host)}
.cgt[data-step="2"] .hdf-vram i,.cgt[data-step="3"] .hdf-vram i,.cgt[data-step="3"] .hdf-ram i{background:var(--device);border-color:var(--device)}
.cgt[data-step="2"] .hdf-sms i{background:var(--device);border-color:var(--device);animation:hdf-blink 1s infinite alternate}
.cgt[data-step="1"] .hdf-lane i{opacity:1;background:var(--host);animation:hdf-go 1.2s linear infinite}
.cgt[data-step="3"] .hdf-lane i{opacity:1;background:var(--device);animation:hdf-back 1.2s linear infinite}
.hdf-lane i:nth-child(2){animation-delay:.4s!important}.hdf-lane i:nth-child(3){animation-delay:.8s!important}
@keyframes hdf-go{from{left:-12px}to{left:100%}}
@keyframes hdf-back{from{left:100%}to{left:-12px}}
@keyframes hdf-blink{from{opacity:.55}to{opacity:1}}
@media (max-width:560px){.hdf-row{grid-template-columns:1fr}.hdf-lane{max-width:220px;margin:6px auto 0}}
/* sm-inside */
.smi-gpu{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-bottom:12px;color:var(--dimmer);font-size:.72rem}
.smi-tiles{display:grid;grid-template-columns:repeat(12,14px);gap:3px}
.smi-tiles i{display:block;height:14px;border-radius:3px;background:var(--panel2);border:1px solid var(--border)}
.smi-tiles i.on{background:var(--accent);border-color:var(--accent)}
.smi-sm{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:8px;border:1px solid var(--accent-line);background:var(--accent-wash);border-radius:12px;padding:26px 10px 10px}
.smi-lbl{position:absolute;top:6px;left:12px;color:var(--device);font-weight:700;font-size:.78rem}
.smi-sm button{font-family:var(--mono);font-size:.76rem;color:var(--text);background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:10px 8px;cursor:pointer;text-align:center}
.smi-sm button.on{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}
.smi-sm button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.smi-ctrl,.smi-smem,.smi-exec{grid-column:span 2}
.smi-ctrl{border-color:var(--warp)!important;color:var(--warp)!important}
.smi-reg{grid-column:span 2;color:var(--block)!important}
.smi-exec{display:flex;flex-direction:column;gap:8px;align-items:center}
.smi-units{display:grid;grid-template-columns:repeat(16,1fr);gap:3px;width:100%}
.smi-units i{display:block;height:12px;border-radius:2px;background:var(--device);opacity:.75}
.smi-smem{color:var(--cool)!important}