*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ink-0);color:var(--paper);font-family:var(--font-body);font-size:1.0625rem;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;pointer-events:none;background-image:radial-gradient(rgb(242 236 225 / .07) 1px,transparent 1.2px);background-size:22px 22px;mask-image:linear-gradient(#000 0,transparent 70%)}
main,header,footer{position:relative}
h1,h2,h3{text-wrap:balance;font-family:var(--font-display);margin:0;letter-spacing:-.03em;line-height:1.02;font-weight:800}
p{margin:0}
::selection{background:var(--signal);color:var(--on-signal)}
html{scrollbar-color:var(--ink-3) var(--ink-0)}
input,textarea,[contenteditable]{caret-color:var(--signal)}
a{color:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding-inline:var(--gutter)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;background:var(--paper);color:var(--ink-0);padding:10px 16px;border-radius:var(--r-pill);z-index:30;text-decoration:none;font-weight:600}
.skip:focus{top:12px}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:6px}

/* nav */
.nav-wrap{position:fixed;top:14px;left:0;right:0;z-index:var(--z-nav);display:flex;justify-content:center;padding-inline:12px;pointer-events:none}
.nav{pointer-events:auto;display:flex;align-items:center;gap:6px;background:rgb(21 18 14 / .88);border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 6px 6px 8px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);max-width:100%}
.nav-back{display:inline-flex;align-items:center;min-height:44px;background:var(--signal);color:var(--on-signal);font-weight:600;font-size:.9rem;padding:9px 18px;border-radius:var(--r-pill);text-decoration:none;white-space:nowrap;transition:background var(--dur-ui) var(--ease-out),transform var(--dur-press) var(--ease-out)}
.nav-back:active{transform:scale(.97)}
.nav-links{display:flex;list-style:none;margin:0;padding:0 6px 0 4px;gap:2px}
.nav-links a{display:flex;align-items:center;min-height:44px;padding:9px 12px;border-radius:var(--r-pill);font-size:.9rem;text-decoration:none;color:var(--paper-2);transition:color var(--dur-ui) ease,background var(--dur-ui) ease,transform var(--dur-press) var(--ease-out)}
.nav-links a:active{transform:scale(.97)}
@media (max-width:760px){.nav-links{display:none}.nav{padding:5px}}

/* type bits */
.eyebrow{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--paper-3)}
.mono-label,.mono-note{font-family:var(--font-mono);font-size:.78rem;color:var(--paper-3);letter-spacing:.02em}
.sig{color:var(--signal)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:14px;font:600 1rem var(--font-body);border:1px solid transparent;border-radius:var(--r-pill);padding:8px 8px 8px 24px;cursor:pointer;text-decoration:none;white-space:nowrap;transition:background var(--dur-ui) ease,border-color var(--dur-ui) ease,transform var(--dur-press) var(--ease-out)}
.btn:active{transform:scale(.97)}
.btn-ico{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:rgb(13 11 9 / .16);transition:transform var(--dur-ui) var(--ease-out)}
.btn-primary{background:var(--signal);color:var(--on-signal)}
.btn-ghost{background:transparent;color:var(--paper);border-color:var(--ink-3);padding:13px 24px}
.btn-sm{font-size:.92rem;min-height:44px;padding:6px 6px 6px 18px}
.btn-sm.btn-ghost{padding:10px 20px}
.btn-sm .btn-ico{width:32px;height:32px}
.btn-lg{font-size:1.15rem;padding:10px 10px 10px 30px}
.btn-lg .btn-ico{width:40px;height:40px}

/* hero */
.hero{padding-top:100px;padding-bottom:clamp(48px,7vw,96px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:clamp(28px,4vw,64px);align-items:center}
.hero-copy .eyebrow{margin-bottom:22px}
h1{font-size:clamp(3.2rem,8.4vw,7.2rem);letter-spacing:-.025em;word-spacing:.04em;line-height:.94}
.lede{margin-top:24px;max-width:30ch;font-size:clamp(1.1rem,1.6vw,1.3rem);color:var(--paper-2);line-height:1.45}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}

/* scope */
.scope{position:relative;background:var(--ink-1);border:1px solid var(--line);border-radius:var(--r-panel);padding:16px;box-shadow:0 30px 60px -30px rgb(0 0 0 / .6)}
.scope-head{display:flex;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.scope-title{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--paper)}
.scope-tag{font-family:var(--font-mono);font-size:.78rem;color:var(--paper-3);margin-right:auto}
.chip-btn{font:500 .8rem var(--font-mono);color:var(--paper-2);background:transparent;border:1px solid var(--ink-3);border-radius:var(--r-pill);min-height:44px;padding:6px 14px;cursor:pointer;transition:background var(--dur-ui) ease,color var(--dur-ui) ease,border-color var(--dur-ui) ease,transform var(--dur-press) var(--ease-out)}
.chip-btn:active{transform:scale(.97)}
.chip-btn[data-on]{border-color:var(--listen);color:var(--listen)}
.scope-canvas{position:relative;height:clamp(190px,22vw,250px);background:var(--ink-0);border:1px solid var(--line-soft);border-radius:10px;overflow:hidden}
#wave{display:block;width:100%;height:100%}
.lane-label{position:absolute;left:8px;z-index:1;font-family:var(--font-mono);font-size:.75rem;letter-spacing:.14em;padding:2px 6px;border-radius:4px;background:rgb(13 11 9 / .82)}
.lane-caller{top:8px;color:var(--listen)}
.lane-agent{bottom:8px;color:var(--signal);transition:opacity 300ms var(--ease-out)}
/* barge-in: agent channel is cut (label dims, ring snaps on fast, releases slower) */
.scope::after{content:"";position:absolute;inset:-1px;border:1px solid var(--signal);border-radius:var(--r-panel);opacity:0;pointer-events:none;transition:opacity 400ms var(--ease-out)}
.scope[data-state="INTERRUPTED"]::after{opacity:1;transition-duration:80ms}
.scope[data-state="INTERRUPTED"] .lane-agent{opacity:.3;transition-duration:80ms}
.states{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.states span{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;padding:6px 11px;border-radius:var(--r-pill);border:1px solid var(--ink-3);color:var(--paper-3);transition:background 160ms ease,color 160ms ease,border-color 160ms ease}
.states span.on{color:var(--on-signal);border-color:transparent;background:var(--paper)}
.states span.on[data-s="LISTENING"]{background:var(--listen)}
.states span.on[data-s="SPEAKING"]{background:var(--signal-hi)}
.states span.on[data-s="INTERRUPTED"]{background:var(--signal)}
.buffer-row{display:flex;align-items:center;gap:12px;margin-top:12px}
.cells{display:grid;grid-template-columns:repeat(20,1fr);gap:3px;flex:1;height:14px}
.cells i{background:var(--ink-3);border-radius:2px;transition:background 90ms var(--ease-out),transform 90ms var(--ease-out)}
.cells i.f{background:var(--signal-hi)}
.cells i.x{background:var(--signal);transform:scaleY(.4)}
.readout{margin-top:12px;font-family:var(--font-mono);font-size:.82rem;color:var(--paper)}
.scope-foot{display:flex;align-items:center;gap:16px;margin-top:12px;flex-wrap:wrap}
.scope-foot .mono-note{flex:1;min-width:180px}

/* hero budget bar */
.budget-hero{margin:clamp(36px,5vw,64px) 0 0}
.bh-bar{display:flex;gap:3px;height:clamp(54px,7vw,84px)}
.seg{flex:var(--w) 1 0;min-width:0;display:flex;align-items:flex-end;padding:8px 10px;font-family:var(--font-mono);font-weight:700;font-size:clamp(.8rem,1.4vw,1.1rem);color:var(--on-signal);border-radius:8px;transform-origin:left}
.seg-t{background:var(--listen)}
.seg-s{background:var(--listen-lo)}
.seg-l{background:var(--signal)}
.seg-v{background:var(--signal-hi)}
.seg-h{background:repeating-linear-gradient(135deg,var(--ink-3) 0 3px,transparent 3px 7px);border:1px dashed var(--paper-3);padding:0}
.bh-legend{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:12px;font-family:var(--font-mono);font-size:.78rem;color:var(--paper-2)}
.bh-legend span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:7px;vertical-align:-1px}
.k-t::before{background:var(--listen)}.k-s::before{background:var(--listen-lo)}.k-l::before{background:var(--signal)}.k-v::before{background:var(--signal-hi)}
.k-end{margin-left:auto;color:var(--paper)}.k-end::before{display:none!important}
figcaption{margin-top:6px;font-size:.82rem;color:var(--paper-3)}
@keyframes grow{from{transform:scaleX(0);opacity:0}to{transform:none;opacity:1}}
/* latency segments: grow from the left in sequence once on screen; replays when the waterfall mode changes */
.js .bh-bar:not(.play) .seg,.js .wf:not(.play) .wf-bar{opacity:0}
.js .bh-bar.play .seg,.js .wf.play:not(.instant) .wf-bar{animation:grow 420ms var(--ease-out) backwards;animation-delay:calc(var(--i) * var(--stagger))}

/* sections */
.sec{padding-block:var(--section);border-top:1px solid var(--line-soft)}
h2{font-size:clamp(2.1rem,5vw,4.2rem);max-width:18ch}
.sec-lede{margin-top:20px;max-width:56ch;color:var(--paper-2);font-size:1.1rem}
.fine{margin-top:20px;max-width:70ch;font-size:.86rem;color:var(--paper-3)}

/* waterfall */
.seg-ctl{display:inline-flex;flex-wrap:wrap;gap:4px;margin-top:32px;padding:4px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--ink-1)}
.seg-ctl button{font:600 .9rem var(--font-body);color:var(--paper-2);background:transparent;border:0;border-radius:var(--r-pill);min-height:44px;padding:9px 18px;cursor:pointer;transition:background var(--dur-ui) var(--ease-out),color var(--dur-ui) ease,transform var(--dur-press) var(--ease-out)}
.seg-ctl button:active{transform:scale(.97)}
.seg-ctl button[aria-pressed="true"]{background:var(--paper);color:var(--ink-0)}
.wf{margin-top:36px}
.wf-group+.wf-group{margin-top:44px}
.wf-title{font-family:var(--font-display);font-weight:600;font-size:1.15rem;margin-bottom:14px;letter-spacing:-.01em}
.wf-title small{font-family:var(--font-mono);font-weight:400;font-size:.78rem;color:var(--paper-3);margin-left:10px}
.wf-row{display:grid;grid-template-columns:minmax(120px,210px) 1fr 68px;align-items:center;gap:14px;min-height:40px}
.wf-row dt,.wf-name{font-size:.92rem;color:var(--paper-2)}
.wf-track{position:relative;height:26px}
.wf-bar{position:absolute;top:2px;bottom:2px;border-radius:6px;transform-origin:left}
.wf-ms{font-variant-numeric:tabular-nums;font-family:var(--font-mono);font-size:.88rem;text-align:right;color:var(--paper)}
.wf-row.total{border-top:1px solid var(--ink-3);margin-top:6px;padding-top:6px}
.wf-row.total .wf-name,.wf-row.total .wf-ms{color:var(--paper);font-weight:700}
.wf-axis{display:grid;grid-template-columns:minmax(120px,210px) 1fr 68px;gap:14px;margin-top:6px}
.wf-ticks{position:relative;height:22px;border-top:1px solid var(--ink-3)}
.wf-ticks span{position:absolute;top:4px;transform:translateX(-50%);font-family:var(--font-mono);font-size:.75rem;color:var(--paper-3)}
.wf-ticks span:first-child{transform:none}
.wf-line{position:absolute;top:-4px;bottom:-4px;border-left:2px dashed var(--signal);pointer-events:none}
.wf-line em{position:absolute;top:-22px;left:6px;font-style:normal;font-family:var(--font-mono);font-size:.75rem;color:var(--signal);white-space:nowrap}
.c-t{background:var(--listen)}.c-s{background:var(--listen-lo)}.c-l{background:var(--signal)}.c-v{background:var(--signal-hi)}
.c-r{background:#6f665a}.c-r2{background:#857b6d}.c-r3{background:#9a9082}.c-r4{background:#b0a698}
@media (max-width:640px){
  .wf-row,.wf-axis{grid-template-columns:1fr 62px;gap:2px 10px}
  .wf-name{grid-column:1/-1;margin-top:8px}
  .wf-axis>span{display:none}
  .wf-row.total .wf-name{grid-column:1/-1}
}

/* pipeline */
.flow{list-style:none;margin:48px 0 0;padding:0;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:0;counter-reset:n}
.flow li{position:relative;padding:20px 18px 22px 0;border-top:2px solid var(--ink-3);display:flex;flex-direction:column;gap:8px}
.flow li::before{content:"";position:absolute;top:-6px;left:0;width:10px;height:10px;border-radius:50%;background:var(--ink-0);border:2px solid var(--listen)}
.flow li.hot::before,.flow li:nth-child(n+5)::before{border-color:var(--signal)}
.flow li.hot{border-top-color:var(--signal)}
.flow b{font-family:var(--font-display);font-size:1.15rem;letter-spacing:-.02em;margin-top:8px}
.flow span{font-size:.9rem;color:var(--paper-2);line-height:1.4}
.bud{font-style:normal;font-family:var(--font-mono);font-size:.78rem;color:var(--listen);margin-top:auto}
.flow li:nth-child(n+5) .bud,.flow li.hot .bud{color:var(--signal-hi)}
@media (max-width:1000px){
  .flow{grid-template-columns:1fr;border-left:2px solid var(--ink-3);margin-left:6px}
  .flow li{border-top:0;padding:0 0 26px 22px}
  .flow li::before{top:6px;left:-8px}
  .flow li.hot{border-top:0}
  .flow b{margin-top:0}
}
.cancel{position:relative;margin-top:56px;max-width:760px;padding-top:25px}
.cancel::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--signal);transform-origin:left;transition:transform 420ms var(--ease-in-out)}
.js .cancel:not(.in)::before{transform:scaleX(0)}
.cancel h3{font-size:1.5rem;letter-spacing:-.02em}
.cancel p{margin-top:8px;color:var(--paper-2)}
.cancel ol{margin:14px 0 0;padding-left:1.2em;color:var(--paper);display:grid;gap:6px}
.cancel li::marker{color:var(--signal);font-family:var(--font-mono)}

/* telemetry */
.tel-bar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:28px}
.table-scroll{margin-top:20px;overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-panel);background:var(--ink-1)}
.tel{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;font-family:var(--font-mono);font-size:.88rem;min-width:640px}
.tel th{text-align:right;font-weight:500;color:var(--paper-3);font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;padding:14px 16px;border-bottom:1px solid var(--ink-3)}
.tel td{text-align:right;padding:13px 16px;color:var(--paper-2)}
.tel tbody tr+tr td{border-top:1px solid var(--line-soft)}
.tel th:first-child,.tel td:first-child{text-align:left}
.tel td.rtt{color:var(--paper);font-weight:700}
.tel td.cut{color:var(--signal-hi)}
.tel tbody tr.new{animation:row-in 240ms var(--ease-out)}
@keyframes row-in{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* use cases */
.uses{display:grid;grid-template-columns:1.25fr 1fr;grid-template-rows:auto auto;gap:0 clamp(28px,5vw,80px);margin-top:48px}
.use{padding:26px 0;border-top:1px solid var(--ink-3)}
.use h3{font-size:clamp(1.3rem,2.2vw,1.8rem);letter-spacing:-.025em}
.use p{margin-top:10px;color:var(--paper-2);max-width:48ch}
.use-main{grid-row:1/3;border-top:2px solid var(--signal)}
.use-main h3{font-size:clamp(2rem,4vw,3.4rem)}
.use-main p{font-size:1.15rem}
@media (max-width:820px){.uses{grid-template-columns:1fr}.use-main{grid-row:auto}}

/* stack */
.stack{margin:44px 0 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(28px,5vw,80px)}
.stack div{padding:20px 0;border-top:1px solid var(--ink-3)}
.stack dt{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--listen)}
.stack div:nth-child(n+3) dt{color:var(--signal-hi)}
.stack dd{margin:8px 0 0;font-family:var(--font-display);font-weight:600;font-size:clamp(1.2rem,2vw,1.55rem);letter-spacing:-.02em;line-height:1.2}
@media (max-width:700px){.stack{grid-template-columns:1fr}}

/* end */
.end-grid{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap}
.end h2{margin-top:16px}
.foot{border-top:1px solid var(--line-soft);padding:28px 0;color:var(--paper-3);font-size:.9rem}
.foot-in{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.foot a{display:inline-flex;align-items:center;min-height:44px}

/* responsive hero */
@media (max-width:900px){
  .hero{padding-top:84px}
  .hero-grid{grid-template-columns:1fr}
  .lede{max-width:36ch}
}
@media (max-width:480px){
  .seg{padding:6px;font-size:.75rem}
  .bh-legend .k-end{margin-left:0;width:100%}
  .cells{grid-template-columns:repeat(16,1fr)}
  .btn{padding-left:20px}
}

/* hover feedback: pointer devices only */
@media (hover:hover) and (pointer:fine){
  .nav-back:hover{background:var(--signal-hi)}
  .nav-links a:hover{color:var(--paper);background:var(--ink-2)}
  .btn-primary:hover{background:var(--signal-hi)}
  .btn-ghost:hover{background:var(--ink-2);border-color:var(--paper-3)}
  .btn:hover .btn-ico{transform:translate(2px,-1px)}
  .chip-btn:hover{background:var(--ink-2);color:var(--paper)}
  .seg-ctl button:hover{color:var(--paper)}
}

/* entrances (one-shot; hidden start states only exist when JS runs) */
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes rise-hero{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.js .reveal{opacity:0}
.js .reveal.in{opacity:1;animation:rise var(--dur-reveal) var(--ease-out) backwards;animation-delay:var(--d,0ms)}
.stag>:nth-child(1){--k:0}.stag>:nth-child(2){--k:1}.stag>:nth-child(3){--k:2}.stag>:nth-child(4){--k:3}.stag>:nth-child(5){--k:4}.stag>:nth-child(6){--k:5}
.js .stag:not(.in)>*{opacity:0}
.js .stag.in>*{animation:rise var(--dur-reveal) var(--ease-out) backwards;animation-delay:calc(var(--k) * var(--stagger))}
.cancel li:nth-child(1){--k:0}.cancel li:nth-child(2){--k:1}.cancel li:nth-child(3){--k:2}.cancel li:nth-child(4){--k:3}
.js .cancel:not(.in)>:not(ol),.js .cancel:not(.in) li{opacity:0}
.js .cancel.in>:not(ol){animation:rise var(--dur-reveal) var(--ease-out) backwards}
.js .cancel.in li{animation:rise var(--dur-reveal) var(--ease-out) backwards;animation-delay:calc(200ms + var(--k) * 80ms)}
/* hero load, rare tier: copy cascades, scope arrives alongside */
.js .hero-copy .eyebrow{animation:rise-hero var(--dur-hero) var(--ease-out) backwards}
.js .hero-copy .ln{display:inline-block;animation:rise-hero var(--dur-hero) var(--ease-out) backwards;animation-delay:60ms}
.js .hero-copy .ln.sig{animation-delay:140ms}
.js .hero-copy .lede{animation:rise-hero var(--dur-hero) var(--ease-out) backwards;animation-delay:220ms}
.js .hero-copy .cta-row{animation:rise-hero var(--dur-hero) var(--ease-out) backwards;animation-delay:280ms}
.js .hero .scope{animation:rise-hero var(--dur-hero) var(--ease-out) backwards;animation-delay:160ms}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .reveal,.js .stag>*,.js .cancel>*,.js .cancel li,.js .seg,.js .wf-bar{opacity:1!important;transform:none!important}
  .js .cancel::before{transform:none!important}
}