/* ───────── Fonts (self-hosted, latin subset) ───────── */
@font-face { font-family: "Instrument Serif"; src: url(../assets/fonts/instrument-serif-latin-400-normal.woff2) format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Instrument Serif"; src: url(../assets/fonts/instrument-serif-latin-400-italic.woff2) format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url(../assets/fonts/instrument-sans-latin-wght-normal.woff2) format("woff2"); font-weight: 400 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono Variable"; src: url(../assets/fonts/jetbrains-mono-latin-wght-normal.woff2) format("woff2"); font-weight: 100 800; font-display: swap; }

/* ───────── Tokens ───────── */
:root {
  --paper: #efebe2; --paper-2: #e4dfd3; --ink: #12110f; --mute: #615c53;
  --line: rgb(18 17 15 / .14); --signal: #ff3d14; --signal-ink: #bd2607; --btn: #bd2607; --on-signal: #fff;
  --panel: #14130f; --panel-line: #3a3731; --panel-text: #ede9df; --panel-mute: #938e82;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono Variable", ui-monospace, "Cascadia Code", Consolas, monospace;
  --gut: clamp(16px, 4vw, 40px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #12110f; --paper-2: #1b1a16; --ink: #efebe2; --mute: #9a9588; --line: rgb(239 235 226 / .14);
    --signal-ink: #ff6a4a; --btn: #ff6a4a; --on-signal: #12110f; --panel: #1d1b17; --panel-line: #413e37; color-scheme: dark;
  }
}

/* ───────── Base ───────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.55 var(--sans); text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration-color: var(--signal); text-underline-offset: .18em; text-decoration-thickness: 1.5px; }
a:hover { color: var(--signal-ink); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0; letter-spacing: -.01em; }
h1 em, h2 em { font-style: italic; color: var(--signal-ink); }
p { margin: 0 0 1em; }
b { font-weight: 600; }
.wrap { width: min(1180px, 100% - var(--gut) * 2); margin-inline: auto; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 8px; top: -60px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 50; }
.skip:focus { top: 8px; }
.fine { font: 400 .72rem/1.5 var(--mono); color: var(--mute); }
.panel .fine { color: var(--panel-mute); margin: 14px 0 0; }

/* ───────── Header ───────── */
.bar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px var(--gut); background: color-mix(in srgb, var(--paper) 86%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 400 1.35rem/1 var(--serif); }
.brand:hover { color: inherit; }
.bar nav ol { display: flex; gap: clamp(10px, 1.6vw, 22px); list-style: none; margin: 0; padding: 0; font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.bar nav a { text-decoration: none; color: var(--mute); padding: 8px 0; display: inline-block; border-bottom: 2px solid transparent; }
.bar nav a i { font-style: normal; opacity: .55; margin-right: 5px; }
.bar nav a:hover, .bar nav a[aria-current] { color: var(--ink); }
.bar nav a[aria-current] { border-bottom-color: var(--signal); }
@media (max-width: 860px) { .bar nav li:not(.emit):not(.keep) { display: none; } .bar nav a { color: var(--ink); border: 1px solid var(--ink); padding: 8px 12px; border-radius: 99px; } }

/* ───────── Hero ───────── */
.hero { padding: clamp(28px, 5vw, 64px) 0 clamp(36px, 5vw, 64px); }
.eyebrow { display: flex; flex-wrap: wrap; gap: 6px 18px; font: 500 .74rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); margin-bottom: 22px; }
.eyebrow span:first-child { color: var(--ink); }
.eyebrow span + span { border-left: 1px solid var(--line); padding-left: 18px; }
h1 { font-size: clamp(2.35rem, 4.7vw, 4.3rem); line-height: 1; letter-spacing: -.02em; margin-bottom: .36em; }
.hero h1 { font-size: min(3.9rem, calc((min(1180px, 100vw - var(--gut) * 2)) / 21.2)); white-space: nowrap; }
.lede { font-size: clamp(1.02rem, 1.5vw, 1.2rem); max-width: 60ch; color: color-mix(in srgb, var(--ink) 82%, var(--paper)); margin-bottom: 28px; }

  linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 40px,
  linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 40px 100%, var(--paper-2);
  background-blend-mode: normal; border: 1px solid var(--ink); border-radius: 2px; overflow: hidden; }


.controls { display: flex; flex-wrap: wrap; align-items: end; gap: 14px 28px; margin: 22px 0 6px; font: 500 .8rem/1 var(--mono); }
.controls label { display: grid; gap: 10px; flex: 1 1 220px; max-width: 380px; text-transform: uppercase; letter-spacing: .06em; color: var(--mute); }
.controls output { color: var(--ink); font-variant-numeric: tabular-nums; }
.btns { display: flex; gap: 8px; margin-left: auto; }
button { font: inherit; cursor: pointer; }
.btns button, .ghost { font: 500 .74rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; padding: 10px 14px; border: 1px solid var(--ink); background: transparent; color: var(--ink); border-radius: 99px; transition: background .2s, color .2s; }
.btns button:hover { background: var(--ink); color: var(--paper); }
.readout { font: 400 .76rem/1.5 var(--mono); color: var(--ink); margin: 12px 0 0; min-height: 1.5em; }
.readout.dim { color: var(--mute); margin-top: 2px; }
.how { margin-top: 18px; max-width: 72ch; font-size: .95rem; color: var(--mute); }
.how summary { cursor: pointer; font: 500 .74rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--ink); padding: 6px 0; }
.plain { list-style: none; margin: 0; padding: 18px; border: 1px solid var(--ink); display: grid; gap: 6px; }

/* Range inputs */
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 22px; background: transparent; cursor: pointer; margin: 0; }
input[type=range]::-webkit-slider-runnable-track { height: 2px; background: currentColor; opacity: 1; }
input[type=range]::-moz-range-track { height: 2px; background: currentColor; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; margin-top: -7px; background: var(--signal); border: 2px solid var(--paper); box-shadow: 0 0 0 1px var(--ink); border-radius: 0; }
input[type=range]::-moz-range-thumb { width: 12px; height: 12px; background: var(--signal); border: 2px solid var(--paper); border-radius: 0; box-shadow: 0 0 0 1px var(--ink); }

/* ───────── Stage sections ───────── */
.sec-head { max-width: 760px; margin-bottom: clamp(24px, 4vw, 44px); }
.tagline { font: 500 .74rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); margin-bottom: 14px; }
.tagline i { font-style: normal; color: var(--signal-ink); margin-right: 8px; }
h2 { font-size: clamp(2.1rem, 5.2vw, 4.2rem); line-height: .98; margin-bottom: .45em; }
h3 { font-size: clamp(1.5rem, 2.4vw, 2rem); line-height: 1.05; margin-bottom: .4em; }
.sec-head p { max-width: 62ch; color: color-mix(in srgb, var(--ink) 85%, var(--paper)); }

/* Panel (instrument look) */
.panel { background: var(--panel); color: var(--panel-text); padding: clamp(14px, 2.4vw, 24px); border-radius: 4px; --text: var(--panel-text); }
.panel-top { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
.panel .ghost { color: var(--panel-text); border-color: var(--panel-line); }
.panel .ghost:hover { border-color: var(--panel-text); }
.seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--panel-line); border-radius: 99px; padding: 3px; margin-right: auto; }
.seg button { font: 500 .72rem/1.2 var(--mono); padding: 9px 14px; border: 0; border-radius: 99px; background: transparent; color: var(--panel-mute); }
.seg button[aria-pressed=true] { background: #c92a08; color: #fff; }
.panel canvas { width: 100%; height: clamp(260px, 38vw, 400px); }
@media (max-width: 560px) { #sim-concurrency canvas { height: 400px; } #sim-fps canvas { height: 300px; } }
.slider { display: grid; gap: 6px; font: 500 .74rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--panel-mute); margin-top: 14px; }
.slider output { color: var(--panel-text); }
.panel input[type=range] { color: var(--panel-text); }
.panel input[type=range]::-webkit-slider-thumb { border-color: var(--panel); box-shadow: 0 0 0 1px var(--panel-text); }
.stats { display: flex; gap: clamp(18px, 4vw, 48px); margin: 18px 0 0; flex-wrap: wrap; }
.stats div { display: grid; gap: 2px; }
.stats dt { order: 2; font: 500 .68rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--panel-mute); }
.stats dd { margin: 0; font: 400 clamp(2rem, 4vw, 3rem)/1 var(--serif); font-variant-numeric: tabular-nums; }
.stats dd.sig { color: var(--signal); }
.note { margin: 14px 0 0; font: 400 .82rem/1.5 var(--mono); color: var(--panel-text); min-height: 2.4em; }
.fps-row { display: grid; grid-template-columns: 1fr auto; gap: 8px 18px; align-items: end; margin-top: 8px; }
.fps-row .slider { margin: 0; }
.fps-row .stats { grid-column: 1 / -1; margin-top: 4px; }
.stats.compact dd { font-size: 2.4rem; }

.feeds { display: grid; grid-template-columns: repeat(20, 1fr); gap: 4px; }
.feeds i { aspect-ratio: 16 / 10; background: color-mix(in srgb, var(--panel-text) 20%, transparent); border-radius: 1px; transition: background .25s; }
.feeds i[data-d] { background: var(--signal); animation: blink .6s steps(2) infinite; }
@keyframes blink { 50% { opacity: .35; } }
@media (max-width: 640px) { .feeds { grid-template-columns: repeat(12, 1fr); gap: 3px; } }
.live-dot { display: inline-block; width: 8px; height: 8px; background: var(--signal); margin-right: 8px; border-radius: 50%; }

/* Agents schematic */
.agents { display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px 48px; margin-top: clamp(44px, 7vw, 84px); align-items: center; }
.agents p:not(.tagline) { max-width: 52ch; }
.schematic { margin: 0; }
.schematic ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 22px; }
.schematic li { position: relative; border: 1.5px solid var(--ink); padding: 14px 18px; display: flex; justify-content: space-between; align-items: baseline; background: var(--paper-2); }
.schematic li:nth-child(2) { border-color: var(--signal); }
.schematic li span { font: 400 1.5rem/1 var(--serif); }
.schematic li small { font: 500 .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); }
.schematic li:not(:last-child)::after { content: ""; position: absolute; left: 28px; top: 100%; height: 22px; border-left: 1.5px dashed var(--mute); }
.schematic figcaption { margin-top: 12px; font: 400 .72rem/1.4 var(--mono); color: var(--mute); }
@media (max-width: 800px) { .agents { grid-template-columns: 1fr; } }

/* Cards, bars */
.two { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 800px) { .two { grid-template-columns: 1fr; } }
.card { border: 1px solid var(--ink); padding: clamp(18px, 2.6vw, 28px); background: transparent; border-radius: 2px; }
.card p { color: color-mix(in srgb, var(--ink) 85%, var(--paper)); }
.bars { display: grid; gap: 12px; margin-top: 22px; }
.bars > div { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; align-items: center; }
.bars span { grid-column: 1 / -1; font: 500 .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); }
.bars i { display: block; height: 14px; background: var(--ink); width: var(--w); transform-origin: left; }
.bars .win i { background: var(--signal); }
.bars b { font: 400 1.7rem/1 var(--serif); }
.ready .bars i { transform: scaleX(0); transition: transform 1.1s cubic-bezier(.2, .7, .1, 1) .15s; }
.ready .in .bars i { transform: none; }

.constraints { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.constraints li { font: 500 .78rem/1 var(--mono); padding: 10px 14px; border: 1px solid var(--ink); border-radius: 99px; }

.repos { margin-bottom: 18px; }
a.repo { display: block; text-decoration: none; transition: background .2s, transform .2s; }
a.repo:hover { background: var(--paper-2); transform: translateY(-2px); color: var(--ink); }
.repo small { display: block; font: 500 .7rem/1.3 var(--mono); color: var(--signal-ink); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px; }
.repo p { margin: 0; font-size: .98rem; }
.lists { margin-top: clamp(32px, 5vw, 56px); gap: 36px; }
.lists h3 { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px solid var(--ink); padding-bottom: 10px; margin-bottom: 4px; }
.more { font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.ledger { list-style: none; margin: 0; padding: 0; }
.ledger li { display: flex; justify-content: space-between; gap: 18px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: .96rem; line-height: 1.4; }
.ledger time { font: 400 .72rem/1.6 var(--mono); color: var(--mute); white-space: nowrap; }
.ledger a { text-decoration-color: transparent; }
.ledger a:hover { text-decoration-color: var(--signal); }

/* Emit */
.emit-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(24px, 5vw, 64px); align-items: start; }
@media (max-width: 860px) { .emit-grid { grid-template-columns: 1fr; } }
fieldset { border: 0; padding: 0; margin: 0 0 22px; display: flex; flex-wrap: wrap; gap: 8px; }
legend { font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); margin-bottom: 12px; padding: 0; }
.chip { cursor: pointer; }
.chip input { position: absolute; opacity: 0; }
.chip span { display: inline-block; font: 500 .78rem/1 var(--mono); padding: 11px 15px; border: 1px solid var(--ink); border-radius: 99px; transition: background .2s, color .2s; }
.chip input:checked + span { background: var(--ink); color: var(--paper); }
.chip input:focus-visible + span { outline: 2px solid var(--signal); outline-offset: 3px; }
.field { display: grid; gap: 8px; margin-bottom: 18px; font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); }
.field input, .field textarea { font: 400 1.05rem/1.4 var(--sans); text-transform: none; letter-spacing: 0; color: var(--ink); background: transparent; border: 0; border-bottom: 1.5px solid var(--ink); padding: 8px 0; border-radius: 0; resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-bottom-color: var(--signal); }
.send { font: 500 .85rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; padding: 16px 26px; background: var(--btn); color: var(--on-signal); border: 0; border-radius: 2px; transition: transform .15s, background .2s; }
.send:hover { background: var(--ink); color: var(--paper); transform: translateY(-1px); }
.payload pre { margin: 0 0 22px; padding: 18px; background: var(--panel); color: var(--panel-text); font: 400 .8rem/1.6 var(--mono); border-radius: 4px; white-space: pre-wrap; word-break: break-word; min-height: 9.5em; }
.links { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font: 500 .9rem/1.3 var(--mono); }

.foot { display: grid; gap: 6px; padding: 40px 0 56px; border-top: 1px solid var(--line); }
.foot p { margin: 0; }
.foot .fine { max-width: 70ch; }

/* ───────── Reveal + motion ───────── */
.ready [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .7, .1, 1); }
.ready [data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation: none !important; }
  .ready [data-reveal] { opacity: 1; transform: none; }
  .ready .bars i { transform: none; }
}

/* ───────── Clarity layer ───────── */
.controls label { grid-template-columns: 1fr auto; align-items: end; row-gap: 10px; }
.controls label > span:first-child { font-size: .8rem; color: var(--ink); text-transform: none; letter-spacing: 0; font-family: var(--sans); font-weight: 600; }
.controls label small { display: block; font: 400 .72rem/1.35 var(--mono); color: var(--mute); margin-top: 3px; }
.controls label .val { color: var(--mute); text-transform: uppercase; font-size: .72rem; letter-spacing: .06em; }
.controls label input { grid-column: 1 / -1; }

.quick { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 0 0 clamp(24px, 3vw, 36px); border-top: 1px solid var(--ink); }
.quick > div { padding: 16px 20px 4px 0; display: grid; gap: 6px; align-content: start; }
.quick dt { font: 500 .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--signal-ink); }
.quick dd { margin: 0; font-size: .98rem; line-height: 1.45; }
@media (max-width: 800px) { .quick { grid-template-columns: 1fr; } .quick > div { padding-right: 0; border-bottom: 1px solid var(--line); padding-bottom: 14px; } }

.plain-en { margin: 18px 0 0 !important; padding: 12px 16px; max-width: 62ch; background: var(--paper-2); border-left: 3px solid var(--signal); font-size: .98rem; }
.plain-en b { display: block; font: 500 .68rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--signal-ink); margin-bottom: 6px; }

/* ───────── Ask (LLM agent demo) ───────── */
.ask .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.chipbtn { font: 500 .76rem/1.2 var(--mono); padding: 9px 13px; border: 1px solid var(--panel-line); background: transparent; color: var(--panel-text); border-radius: 99px; text-align: left; transition: border-color .2s, background .2s; }
.chipbtn:hover { border-color: var(--panel-text); background: var(--hover); }
.ask form { display: flex; gap: 8px; margin-bottom: 18px; }
.ask input[type=text] { flex: 1; min-width: 0; font: 400 1.05rem/1.3 var(--sans); padding: 14px 16px; color: var(--panel-text); background: transparent; border: 1px solid var(--panel-line); border-radius: 2px; }
.ask input[type=text]:focus { outline: 2px solid var(--cite); outline-offset: 1px; border-color: var(--cite); }
.ask input::placeholder { color: var(--panel-mute); }
.ask form button { font: 500 .82rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; padding: 0 24px; background: var(--btn); color: var(--on-signal); border: 0; border-radius: 2px; }
.ask form button:disabled { opacity: .5; cursor: progress; }

.trace { list-style: none; margin: 0 0 18px; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.trace li { position: relative; border: 1px solid var(--panel-line); padding: 12px 12px 10px; display: grid; gap: 3px; align-content: start; transition: border-color .3s, background .3s; }
.trace li:not(:last-child)::after { content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%); color: var(--panel-mute); font: 400 .9rem/1 var(--mono); z-index: 1; background: var(--panel); padding: 0 1px; }
.trace b { font: 500 .78rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.trace em { font: 400 .72rem/1.35 var(--mono); font-style: normal; color: var(--panel-text); min-height: 2.7em; }
.trace small { font: 400 .66rem/1.3 var(--mono); color: var(--panel-mute); }
.trace li[data-state=run] { border-color: var(--cite); background: var(--run-bg); }
.trace li[data-state=run] b::after { content: " …"; color: var(--cite); }
.trace li[data-state=ok] { border-color: var(--panel-text); }
.trace li[data-state=ok] b::before { content: "✓ "; color: var(--ok); }
.trace li[data-state=warn] { border-color: var(--warn); }
.trace li[data-state=warn] b::before { content: "! "; color: var(--warn); }
.trace li[data-state=fail] { border-color: var(--cite); }
.trace li[data-state=fail] b::before { content: "✕ "; color: var(--cite); }
@media (max-width: 700px) { .trace { grid-template-columns: 1fr 1fr; } .trace li::after { display: none; } }

.banner { margin: 0 0 12px; padding: 10px 12px; font: 400 .78rem/1.4 var(--mono); border: 1px solid var(--warn); color: var(--warn); }
.answer { min-height: 4.5em; font: 400 clamp(1.05rem, 1.7vw, 1.3rem)/1.5 var(--sans); max-width: 70ch; white-space: pre-wrap; }
.cite { font: 500 .68rem/1 var(--mono); padding: 3px 6px; margin: 0 2px; vertical-align: .15em; border: 1px solid var(--cite); background: transparent; color: var(--cite); border-radius: 2px; cursor: pointer; }
.cite:hover { background: var(--cite); color: var(--panel); }
.cite[data-bad] { border-color: var(--warn); color: var(--warn); text-decoration: line-through; }
.badge { margin: 10px 0 0; font: 500 .78rem/1.4 var(--mono); min-height: 1.4em; }
.badge[data-k=ok] { color: var(--ok); }
.badge[data-k=warn] { color: var(--warn); }
.sources { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 1px; background: var(--panel-line); border: 1px solid var(--panel-line); }
.sources:empty { display: none; }
.sources li { background: var(--panel); padding: 10px 12px; display: grid; gap: 3px; transition: background .4s; }
.sources li.flash { background: var(--run-bg); }
.sources b { font: 500 .68rem/1.2 var(--mono); color: var(--panel-mute); text-transform: uppercase; letter-spacing: .06em; }
.sources span { font-size: .86rem; line-height: 1.45; color: var(--panel-text); }

/* ───────── Hero v2: answer first, evidence beside it ───────── */
.hero-grid { display: block; }
.hero-copy { max-width: none; }
.hero-copy .lede { margin-bottom: 8px; }
.proof { list-style: none; padding: 0; margin: 26px 0 26px; border-top: 1px solid var(--ink); }
.proof li { display: grid; grid-template-columns: minmax(118px, 36%) 1fr; gap: 4px 16px; align-items: baseline; padding: 12px 0; border-bottom: 1px solid var(--line); }
.proof b { font: 400 clamp(1.6rem, 2.8vw, 2.3rem)/1 var(--serif); letter-spacing: -.01em; }
.proof span { font: 400 .78rem/1.4 var(--mono); color: var(--mute); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; }
.btn { display: inline-block; font: 500 .8rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; padding: 14px 18px; border: 1px solid var(--ink); border-radius: 2px; text-decoration: none; color: var(--ink); transition: background .2s, color .2s; }
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--btn); border-color: var(--btn); color: var(--on-signal); }
.btn.primary:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn.link { border-color: transparent; text-decoration: underline; text-decoration-color: var(--signal); text-underline-offset: .25em; padding-inline: 8px; }
.bar nav a.cvlink { border: 1px solid var(--ink); border-radius: 99px; padding: 7px 13px; color: var(--ink); }
.bar nav a.cvlink:hover { background: var(--ink); color: var(--paper); }

.stage-sec { padding: clamp(56px, 9vw, 120px) 0; border-top: 1px solid var(--line); }

/* ───────── Case studies ───────── */
.case { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(22px, 4vw, 56px); align-items: start; padding: clamp(28px, 5vw, 56px) 0; border-top: 1px solid var(--line); }
.case:first-of-type { border-top: 0; padding-top: 8px; }
@media (max-width: 900px) { .case { grid-template-columns: 1fr; } }
.case h3 { font-size: clamp(1.7rem, 3.2vw, 2.5rem); line-height: 1.02; }
.case h3 em { color: var(--signal-ink); }
.fields { margin: 20px 0 0; display: grid; gap: 14px; }
.fields > div { display: grid; grid-template-columns: 92px 1fr; gap: 12px; }
.fields dt { font: 500 .68rem/1.9 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--signal-ink); }
.fields dd { margin: 0; font-size: .98rem; line-height: 1.5; }
@media (max-width: 520px) { .fields > div { grid-template-columns: 1fr; gap: 2px; } }
.case .plain-en { margin-top: 20px !important; }
.case .schematic { margin: 0; align-self: center; }
.also { list-style: none; margin: clamp(20px, 4vw, 40px) 0 0; padding: 0; border-top: 1px solid var(--ink); }
.also li { display: grid; grid-template-columns: 130px 1fr; gap: 4px 14px; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: .98rem; max-width: 100ch; }
@media (max-width: 520px) { .also li { grid-template-columns: 1fr; } }
.also b { font: 500 .72rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--signal-ink); }
.foot .how { max-width: 72ch; color: var(--mute); font-size: .92rem; }
.foot .how summary { color: var(--ink); }

/* ───────── Ask panel theme (generative part) ─────────
   Light mode: a light surface with ink text (contrast 6-17:1), status colours built for light.
   Dark mode: the dark instrument look. All values audited with a WCAG script. */
.panel.ask {
  --panel: #faf8f3; --panel-line: rgb(18 17 15 / .3); --panel-text: #12110f; --panel-mute: #615c53;
  --ok: #1e6b2e; --warn: #8a5400; --cite: #bd2607; --hover: rgb(18 17 15 / .06); --run-bg: rgb(189 38 7 / .08);
  border: 1px solid var(--ink);
}
.panel.ask .sources { background: var(--panel-line); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .panel.ask {
    --panel: #1d1b17; --panel-line: #413e37; --panel-text: #ede9df; --panel-mute: #938e82;
    --ok: #8ee08e; --warn: #e8b04a; --cite: #ff6a4a; --hover: rgb(255 255 255 / .05); --run-bg: rgb(255 106 74 / .1);
    border-color: var(--panel-line);
  }
}

/* ───────── Real detector demo ───────── */


/* ───────── Round 3 ───────── */
button.btn { background: none; cursor: pointer; }
.case.single { grid-template-columns: minmax(0, 1fr); }
.case.single .case-text { max-width: 78ch; }
.ask-note { font: 400 .76rem/1.5 var(--mono); color: var(--panel-mute); margin: 0 0 10px; }
.ask-note a { color: var(--panel-text); }
.fool { margin-top: 18px; border-top: 1px solid var(--panel-line); padding-top: 12px; }
.fool summary { cursor: pointer; font: 500 .74rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.fool-intro { font: 400 .8rem/1.5 var(--mono); color: var(--panel-mute); margin: 10px 0; }
.fool-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.fool-list li { border: 1px solid var(--panel-line); padding: 12px; display: grid; gap: 8px; justify-items: start; }
.fool-s, .fool-n { margin: 0; }
.fool-s { font: 400 1rem/1.5 var(--sans); }
.fool-tag { display: inline-block; font: 600 .62rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; padding: 4px 6px; margin-right: 6px; border: 1px solid var(--warn); color: var(--warn); }
.fool-n { font: 400 .78rem/1.45 var(--mono); color: var(--panel-mute); }
.fool-out { margin: 0; font: 500 .8rem/1.45 var(--mono); }
.fool-out[data-k="ok"] { color: var(--ok); }
.fool-out[data-k="miss"] { color: var(--warn); }

.ledger-wrap { overflow-x: auto; }
.ledger-table { width: 100%; border-collapse: collapse; font-size: .92rem; line-height: 1.45; }
.ledger-table th, .ledger-table td { text-align: left; vertical-align: top; padding: 12px 14px 12px 0; border-bottom: 1px solid var(--line); }
.ledger-table thead th { font: 500 .68rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); border-bottom: 1px solid var(--ink); }
.ledger-table tbody th { font-weight: 600; min-width: 16ch; }
.ledger-table td:last-child { font: 500 .72rem/1.4 var(--mono); color: var(--mute); }
@media (max-width: 820px) {
  .ledger-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .ledger-table, .ledger-table tbody, .ledger-table tr, .ledger-table th, .ledger-table td { display: block; width: 100%; }
  .ledger-table tr { border: 1px solid var(--ink); margin-bottom: 12px; padding: 12px; }
  .ledger-table th, .ledger-table td { border: 0; padding: 4px 0; }
  .ledger-table td::before { content: attr(data-label) ": "; font: 500 .66rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--signal-ink); }
}
.boundary { margin-top: clamp(32px, 5vw, 56px); border: 1px solid var(--ink); padding: clamp(16px, 3vw, 28px); }
.boundary h3 { margin-bottom: 14px; }
.boundary dl { margin: 0; display: grid; gap: 12px; }
.boundary dl > div { display: grid; grid-template-columns: 150px 1fr; gap: 6px 16px; }
.boundary dt { font: 500 .68rem/1.9 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--signal-ink); }
.boundary dd { margin: 0; font-size: .95rem; line-height: 1.5; }
.boundary code { font: 500 .85em var(--mono); }
@media (max-width: 560px) { .boundary dl > div { grid-template-columns: 1fr; } }
.copyrow { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 8px; }
.ghost.light { color: var(--ink); border-color: var(--ink); }
.ghost.light:hover { background: var(--ink); color: var(--paper); }
.courses { margin-top: 10px; font-size: .94rem; }
.courses summary { cursor: pointer; font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; padding: 8px 0; }

/* ───────── Delivered-for strip ─────────
   Tiles take the theme surface and the logos are transparent. Marks are never recoloured. */
.clients { padding: clamp(26px, 3.6vw, 44px) 0; margin-top: clamp(8px, 2vw, 24px); border-block: 1px solid var(--line); overflow: hidden; --mq-gap: clamp(44px, 6vw, 76px); --mq-filter: brightness(0); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .clients { --mq-filter: brightness(0) invert(1); } }
.clients-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 8px; }
.clients-h { font: 500 .72rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); margin: 0; }
.clients-by { display: flex; align-items: center; gap: 10px; margin: 14px 0 6px; font-size: .95rem; }
.clients-by img { filter: var(--mq-filter); opacity: .8; }
.clients .fine { max-width: 96ch; font-size: .66rem; line-height: 1.5; opacity: .85; }

/* Hero proof chips: three across on wide screens (placed after the base .proof rules so it wins). */
@media (min-width: 900px) { .proof { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 28px; } .proof li { grid-template-columns: 1fr; gap: 6px; padding: 18px 0 16px; } .proof b { font-size: clamp(2.2rem, 3.6vw, 3.2rem); white-space: nowrap; } }

/* ───────── Credentials strip and capabilities row ───────── */
@media (max-width: 760px) { .creds ul { grid-template-columns: 1fr; } .creds li + li { border-top: 1px solid var(--line); } }
@media (max-width: 980px) { .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .cap-grid { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .cap { transition: none; } }

/* ───────── Client entities as a 1D convolution (illustration) ─────────
   Drawn after a classic CNN diagram, left to right: input (moving, blurred cells), the A-L-I kernel, output.
   One entity pops into the output per step and stays. Built at one natural size and scaled to fit the screen. */
.conv-ctl { display: flex; gap: 8px; flex: none; }
.conv-ctl button { font: 500 .68rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; padding: 7px 12px; border: 1px solid var(--line); border-radius: 99px; background: transparent; color: var(--mute); cursor: pointer; }
.conv-ctl button:hover { color: var(--ink); border-color: var(--ink); }
.client-static { list-style: none; margin: 0 auto; padding: 8px 0 4px; display: flex; flex-wrap: wrap; gap: 14px clamp(28px, 5vw, 64px); justify-content: center; align-items: center; }
.client-static img { display: block; height: var(--h, 56px); width: auto; max-width: 190px; object-fit: contain; filter: var(--mq-filter); opacity: .8; }
.conv-on .client-static { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); padding: 0; }

.conv { --cells: 9; --cw: 46px; --cg: -3px; --lw: 96px; --lg: -3px; --lh: 86px; --sk: -20deg; --tint: #e3f1fb; --bw: 3px; position: relative; margin-top: 10px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .conv { --tint: color-mix(in srgb, #5aa9ff 20%, var(--paper)); } }
.conv[hidden] { display: none; }
.conv-stage { position: relative; display: flex; align-items: center; gap: 74px; width: max-content; padding: 92px 14px 84px; transform-origin: top left; }
.conv-lines { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.conv-lines .ln { stroke: var(--signal); stroke-width: 2; fill: none; stroke-linecap: round; }

/* a slanted bar; the input also has a top face and a left end cap (the extrusion in the reference) */
.bar3d { position: relative; z-index: 1; transform: skewY(var(--sk)); flex: none; }
.bar3d.ext::before { content: ""; position: absolute; left: 0; right: 0; bottom: 100%; height: 11px; transform-origin: 0 100%; transform: skewX(50.5deg); background: var(--paper-2); border: var(--bw) solid var(--ink); border-bottom: 0; margin-bottom: calc(var(--bw) * -1 + 1px); }
.bar3d.ext::after { content: ""; position: absolute; right: 100%; top: 0; bottom: 0; width: 13px; transform-origin: 100% 0; transform: skewY(39.4deg); background: color-mix(in srgb, var(--ink) 16%, var(--paper-2)); border: var(--bw) solid var(--ink); border-right: 0; margin-right: calc(var(--bw) * -1 + 1px); }

.b-in { width: calc(var(--cells) * (var(--cw) + var(--cg)) - var(--cg)); height: var(--cw); margin-top: -64px; }
.conv-view { position: absolute; inset: 0; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, #000, #000 86%, transparent); mask-image: linear-gradient(90deg, #000, #000 86%, transparent); }
.conv-belt { position: absolute; inset: 0; transition: transform .75s cubic-bezier(.3, .7, .2, 1); will-change: transform; }
.sq { position: absolute; top: 0; width: var(--cw); height: var(--cw); display: grid; place-items: center; background: var(--paper); border: var(--bw) solid var(--ink); font: 500 1.05rem/1 var(--mono); font-variant-numeric: tabular-nums; filter: blur(calc(min(var(--d, 4), 4) * .4px)); opacity: calc(1 - min(var(--d, 4), 5) * .09); transition: filter .75s, opacity .75s, background-color .75s; }
.sq.in { filter: none; opacity: 1; background: var(--tint); }
.win { position: absolute; z-index: 2; left: calc((var(--cells) - 3) / 2 * (var(--cw) + var(--cg)) - 4px); width: calc(3 * (var(--cw) + var(--cg)) - var(--cg) + 8px); top: -4px; bottom: -4px; border: 4px solid var(--signal); pointer-events: none; }

.b-k { display: flex; border: 4px solid var(--signal); margin-top: 64px; }
.kc { width: var(--cw); height: calc(var(--cw) + 14px); display: grid; place-content: center; gap: 3px; text-align: center; background: var(--tint); }
.kc + .kc { border-left: var(--bw) solid var(--ink); }
.kc b { font: 400 1.5rem/1 var(--serif); }
.kc i { font: 500 .64rem/1 var(--mono); font-style: normal; color: var(--signal-ink); }

.b-out { display: flex; margin-top: 4px; }
.slot { position: relative; width: var(--lw); height: var(--lh); display: grid; place-items: center; background: var(--paper); border: var(--bw) solid var(--ink); margin-left: var(--lg); transition: background-color .4s; }
.slot:first-child { margin-left: 0; }
.slot img { max-width: 80%; max-height: calc(var(--lh) * .66); width: auto; height: auto; object-fit: contain; filter: var(--mq-filter); opacity: 0; transform: scale(.4); }
.slot.on img { opacity: .92; transform: none; }
.slot.fresh img { animation: pop .6s cubic-bezier(.2, 1.5, .4, 1) both; }
.slot.act { background: var(--signal); }
.slot.act img { filter: brightness(0) invert(1); opacity: 1; }
@keyframes pop { from { opacity: 0; transform: scale(.35); } 60% { opacity: 1; transform: scale(1.14); } to { opacity: 1; transform: scale(1); } }

.conv-y { margin: 6px 0 0; text-align: center; font: 400 .7rem/1.5 var(--mono); font-variant-numeric: tabular-nums; color: var(--mute); }
.conv-y b { font-weight: 500; color: var(--signal-ink); }
@media (prefers-reduced-motion: reduce) { .conv-belt, .sq, .slot { transition: none; } .slot.fresh img { animation: none; } }

/* ───────── Flow: fewer, calmer scenes ───────── */
/* quiet disclosure used for detail that is one click away, never removed */
details.method, details.fold, details.about-logos { margin-top: 14px; }
details.method > summary, details.fold > summary, details.about-logos > summary { cursor: pointer; font: 500 .72rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .07em; color: var(--ink); padding: 8px 0; list-style: none; display: inline-flex; align-items: center; gap: 8px; }
details.method > summary::-webkit-details-marker, details.fold > summary::-webkit-details-marker, details.about-logos > summary::-webkit-details-marker { display: none; }
details.method > summary::before, details.fold > summary::before, details.about-logos > summary::before { content: "+"; display: inline-grid; place-items: center; width: 20px; height: 20px; border: 1px solid var(--ink); border-radius: 50%; font-size: .85rem; line-height: 1; }
details[open].method > summary::before, details[open].fold > summary::before, details[open].about-logos > summary::before { content: "−"; }
details.method > summary:hover, details.fold > summary:hover, details.about-logos > summary:hover { color: var(--signal-ink); }
details.method .fields { margin-top: 8px; }
details.about-logos { margin-top: 6px; }
details.about-logos p { font-size: .66rem; line-height: 1.5; color: var(--mute); max-width: 96ch; margin: 6px 0; }
details.about-logos .clients-by { font-size: .8rem; color: var(--ink); }
.clients { padding-bottom: clamp(14px, 2vw, 24px); }

/* work: a small index and the opening photo */
.case-index { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 4px 0 28px; font: 500 .74rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.case-index a { text-decoration: none; padding: 6px 0; border-bottom: 1px solid var(--line); }
.case-index a:hover { border-color: var(--signal); color: var(--signal-ink); }
.case-index i { font-style: normal; color: var(--signal-ink); margin-right: 6px; }
.field-note { margin: 0 0 clamp(36px, 6vw, 72px); }
.field-note img { display: block; width: 100%; height: auto; max-height: 460px; object-fit: cover; border-radius: 2px; background: var(--paper-2); }
.field-note figcaption { margin-top: 8px; font: 400 .72rem/1.45 var(--mono); color: var(--mute); }

/* the ledger fold keeps its section heading visible */
.stage-sec > details.fold { margin-top: 0; }

/* writing and code: one column of posts */
.lists { margin-top: 28px; }

/* contact: the whole event photo beside the heading */
.contact-top { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(20px, 4vw, 56px); align-items: center; margin-bottom: 8px; }
.contact-top .sec-head { margin-bottom: 0; }
.me { margin: 0; }
.me img { display: block; width: 100%; height: auto; border-radius: 2px; background: var(--paper-2); }
@media (max-width: 860px) { .contact-top { grid-template-columns: 1fr; } .me { max-width: 520px; } }
.bg-line { margin-top: 14px; max-width: 52ch; font-size: .68rem; line-height: 1.55; color: var(--mute); }

/* phones: a simpler diagram (fewer input cells, tighter spacing) so it can be drawn at about half size, not a third */
@media (max-width: 640px) {
  .conv { --cells: 5; --cw: 38px; --lw: 62px; --lh: 58px; }
  .conv-stage { gap: 34px; padding: 74px 8px 66px; }
  .b-in { margin-top: -44px; } .b-k { margin-top: 44px; }
  .sq { font-size: .85rem; } .kc b { font-size: 1.2rem; }
}