:root { color-scheme: dark; --bg: #101010; --paper: #eae8e4; --muted: #a2a19c; --rule: #343432; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; background: var(--bg); color: var(--paper); }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; -webkit-font-smoothing: antialiased; isolation: isolate; }
#fluid-background { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; opacity: .64; filter: saturate(1.4); }
#fluid-background[hidden], #fluid-toggle[hidden] { display: none; }
#fluid-toggle { color: var(--muted); background: transparent; border: 1px solid var(--rule); padding: 6px 9px; font-size: 10px; white-space: nowrap; }
#fluid-toggle:hover { color: var(--paper); border-color: #888; }
#fluid-toggle:disabled { opacity: .5; cursor: wait; }
a { color: inherit; text-decoration: none; }
button, select, input { font: inherit; }
button, select { cursor: pointer; }
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible, pre:focus-visible { outline: 2px solid var(--paper); outline-offset: 6px; }
::selection { background: #eae8e4; color: #101010; }
.wrap { width: min(1264px, calc(100% - 112px)); margin-inline: auto; }
.masthead { display: flex; align-items: center; gap: 32px; min-height: 100px; border-bottom: 1px solid var(--rule); }
.wordmark { font-size: 36px; font-weight: 600; letter-spacing: -.065em; }
.wordmark span { color: #777; }
.site-label, .eyebrow { font-size: 10px; font-weight: 500; letter-spacing: .13em; line-height: 1.5; }
.site-label { padding-left: 30px; border-left: 1px solid var(--rule); color: var(--muted); }
nav { display: flex; align-items: center; gap: 30px; margin-left: auto; font-size: 12px; }
nav a { display: inline-flex; align-items: center; gap: 4px; line-height: 1.5; white-space: nowrap; }
nav a:hover, footer a:hover { color: #aaa; }
.hero { padding-block: 44px 80px; --hcss-duration: 650ms; }
.hero-top { display: flex; justify-content: space-between; }
.subdued { color: #777; }
h1 { font-size: clamp(76px, 9.8vw, 146px); line-height: .91; font-weight: 450; letter-spacing: -.075em; margin: 64px 0 62px; }
.hero-line { display: inline-block; }
.hero-line:first-child { color: var(--paper); }
.hero-line:last-child { color: #d5d3ce; }
.period { font-weight: 300; margin-left: .07em; }
.hero-bottom { display: grid; grid-template-columns: 1.3fr 1fr; gap: 12%; }
.brief { font-size: clamp(19px, 1.7vw, 24px); line-height: 1.55; margin: 0; letter-spacing: -.015em; }
.brief a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.hero-aside { border-left: 1px solid var(--rule); padding-left: 32px; align-self: start; }
.hero-aside > p:not(.eyebrow) { color: var(--muted); font-size: 14px; line-height: 1.65; max-width: 320px; margin: 12px 0 26px; }
.hero-aside .eyebrow { margin-top: 0; padding-block: 20px; }
.button { display: inline-flex; justify-content: space-between; gap: 35px; padding: 16px 20px; background: var(--paper); color: var(--bg); font-size: 13px; font-weight: 500; transition: background 150ms; }
.button:hover { background: #bcbab5; }
.method { border-top: 1px solid var(--rule); padding-block: 65px 90px; display: grid; grid-template-columns: .8fr 1.6fr; gap: 8%; }
h2 { font-size: clamp(32px, 3.2vw, 46px); line-height: 1.12; font-weight: 450; letter-spacing: -.045em; margin: 22px 0 24px; }
.promise { display: grid; grid-template-columns: 25px 1fr; gap: 14px; padding: 24px 0; border-top: 1px solid var(--rule); }
.promise:first-child { padding-top: 0; border-top: 0; }
.promise:hover h3 { text-decoration: underline; text-underline-offset: 5px; }
.promise-mark { font-size: 22px; line-height: 1.3; color: #999; }
h3 { margin: 0 0 10px; font-weight: 500; font-size: 20px; letter-spacing: -.025em; }
.promise p { color: var(--muted); font-size: 14px; line-height: 1.7; max-width: 530px; margin: 0; }
.promise-note { max-width: 530px; }
.promise-ref { display: block; font-size: 9px; letter-spacing: .12em; color: #b8b8b3; margin-top: 17px; }
.tour { padding-block: 68px 44px; border-block: 1px solid var(--rule); }
.tour-heading { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-bottom: 34px; }
.tour-heading p { font-size: 13px; color: var(--muted); line-height: 1.8; margin-bottom: 25px; }
.demo-grid { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 50px; }
.demo-notes label { color: var(--muted); }
select { appearance: auto; width: 100%; background: transparent; color: var(--paper); border: none; border-bottom: 1px solid #484846; border-radius: 0; padding: 12px 2px 12px 0; font-size: 13px; }
option { background: #161616; }
.steps { margin-top: 20px; }
.step { display: block; width: 100%; text-align: left; background: none; border: 0; border-left: 1px solid #3b3b38; padding: 16px 20px; color: #8d8d89; }
.step span { display: block; font-size: 20px; letter-spacing: -.02em; }
.step small { display: block; font-size: 11px; margin-top: 6px; }
.step.active { border-left: 2px solid var(--paper); color: var(--paper); background: transparent; padding-left: 19px; }
.step:hover { color: var(--paper); }
.demo-caption { font-size: 11px; line-height: 1.7; color: var(--muted); max-width: 230px; margin: 24px 0 0; }
.terminal { background: transparent; border: 1px solid #3b3b39; min-width: 0; align-self: start; }
.terminal-bar { min-height: 44px; border-bottom: 1px solid #2b2b2a; display: flex; gap: 20px; align-items: center; padding: 0 18px; font-size: 10px; color: #999; }
.terminal-bar .eyebrow { margin-left: auto; font-size: 8px; }
.terminal-dots { font-size: 8px; letter-spacing: 3px; color: #535351; }
.terminal-command { padding: 20px 22px 12px; color: #eee; font-family: 'SFMono-Regular', Consolas, monospace; font-size: 11px; overflow-wrap: anywhere; }
.terminal-command::before { content: '$ '; color: #888; }
pre { margin: 0; padding: 4px 22px 24px; height: 360px; overflow: auto; font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace; font-size: 11px; line-height: 1.75; color: #b2b2ab; tab-size: 2; }
.transport { border-top: 1px solid #2b2b2a; min-height: 51px; display: flex; gap: 18px; align-items: center; padding: 12px 20px; }
.transport button { background: none; border: 0; color: var(--paper); padding: 3px 0; width: 70px; text-align: left; font-size: 11px; }
.transport button:disabled { color: #666; cursor: default; }
input[type=range] { flex: 1; min-width: 30px; accent-color: #ccc; height: 3px; }
.position { font-size: 9px; color: #aaa; min-width: 38px; text-align: right; font-variant-numeric: tabular-nums; }
.provenance { border-top: 1px solid var(--rule); margin-top: 32px; padding-top: 18px; font-size: 10px; color: var(--muted); display: flex; justify-content: space-between; gap: 18px; line-height: 1.6; }
.provenance > div { display: flex; gap: 24px; flex-shrink: 0; }
.provenance a:hover { color: var(--paper); }
.record-section { padding-block: 90px; display: grid; grid-template-columns: 1fr 1fr; gap: 12%; }
.record-copy { padding-top: 30px; font-size: 18px; line-height: 1.65; letter-spacing: -.01em; }
.record-copy p { margin: 0 0 20px; }
.record-copy p + p { color: var(--muted); font-size: 14px; line-height: 1.8; }
.file-row { display: flex; flex-wrap: wrap; border-top: 1px solid var(--rule); gap: 24px; font-family: 'SFMono-Regular', Consolas, monospace; font-size: 10px; color: #b5b5ad; padding-top: 20px; margin-top: 28px; }
.text-link { display: inline-block; font-size: 12px; border-bottom: 1px solid #777; padding-bottom: 5px; }
.text-link:hover { border-color: #eee; }
.start { border-block: 1px solid var(--rule); padding-block: 60px; display: grid; grid-template-columns: 1fr 1fr; gap: 12%; }
.start > div:last-child { padding-top: 22px; }
.start p { color: var(--muted); font-size: 14px; line-height: 1.8; margin: 0 0 24px; max-width: 410px; }
.start .text-link { display: table; margin-top: 24px; }
footer { min-height: 132px; display: flex; align-items: center; gap: 34px; }
footer > span { color: #888; font-size: 9px; letter-spacing: .12em; }
footer > div { display: flex; gap: 24px; margin-left: auto; font-size: 11px; color: var(--muted); }
.skip-link { position: absolute; top: -100px; left: 20px; padding: 12px 20px; z-index: 10; background: var(--paper); color: var(--bg); }
.skip-link:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
@media (min-width: 1600px) { .wrap { width: min(1400px, calc(100% - 160px)); } }
@media (max-width: 1000px) { .wrap { width: calc(100% - 64px); } .site-label { display: none; } .hero-bottom { gap: 7%; } .method { gap: 6%; grid-template-columns: .8fr 1.2fr; } .demo-grid { gap: 24px; grid-template-columns: 200px minmax(0, 1fr); } .provenance { flex-direction: column; } }
@media (max-width: 700px) { .wrap { width: calc(100% - 40px); } .masthead { min-height: 78px; } nav { gap: 20px; font-size: 11px; } nav a:first-child { display: none; } .wordmark { font-size: 31px; } .hero { padding-block: 28px 50px; } .hero-top .subdued { display: none; } h1 { font-size: clamp(54px, 15vw, 110px); margin: 48px 0 38px; } .hero-bottom, .method, .record-section, .start { grid-template-columns: 1fr; gap: 32px; } .brief { font-size: 19px; } .hero-aside { border-left: 0; border-top: 1px solid var(--rule); padding: 24px 0 0; } .hero-aside > p:not(.eyebrow) { max-width: 100%; } .method { padding-block: 44px; gap: 28px; } h2 { font-size: 35px; } .section-heading h2 br { display: none; } .tour { padding-block: 44px 32px; } .tour-heading { display: block; margin-bottom: 24px; } .tour-heading p { margin-bottom: 0; } .demo-grid { grid-template-columns: 1fr; gap: 20px; } .demo-notes { display: grid; grid-template-columns: 1fr; } .demo-notes select { max-width: 100%; } .steps { display: flex; margin-top: 18px; } .step, .step.active { padding: 12px 0; border-left: 0; border-bottom: 1px solid var(--rule); background: none; text-align: center; } .step.active { border-bottom: 2px solid var(--paper); } .step span { font-size: 15px; } .step small { display: none; } .demo-caption { max-width: 100%; margin-top: 16px; } pre { height: 320px; padding-inline: 14px; font-size: 10px; } .terminal-command { padding-inline: 14px; font-size: 10px; } .terminal-bar { padding-inline: 14px; gap: 10px; } .provenance { margin-top: 22px; font-size: 9px; } .provenance > div { gap: 20px; flex-wrap: wrap; } .record-section { padding-block: 50px; gap: 0; } .record-copy { padding-top: 12px; } .start { padding-block: 44px; gap: 0; } .start > div:last-child { padding-top: 10px; } footer { flex-wrap: wrap; gap: 20px; padding-block: 30px; } footer > div { margin-left: 0; width: 100%; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
@media (max-width: 700px) { .masthead { gap: 16px; } nav { gap: 14px; } #fluid-toggle { font-size: 9px; padding: 5px 6px; } }

/* The agent walkthrough shares its prompts with the generated manual. */
.agent-start { grid-template-columns: .8fr 1.6fr; gap: 8%; align-items: start; }
.agent-start-heading { position: sticky; top: 36px; }
.agent-start-heading h2 { font-size: clamp(40px, 4.6vw, 66px); margin-bottom: 26px; }
.agent-start-heading p { font-size: 14px; line-height: 1.85; }
.agent-start .agent-start-content { padding-top: 0; min-width: 0; }
.agent-start p { max-width: none; color: var(--paper); }
.agent-start .agent-intro { font-size: 19px; color: var(--paper); letter-spacing: -.015em; line-height: 1.65; margin-bottom: 22px; }
.agent-demo-link { display: inline-block; font-size: 12px; border-bottom: 1px solid #777; padding-bottom: 5px; margin-bottom: 28px; }
.agent-demo-link:hover { border-color: var(--paper); }
.agent-start .agent-scenario { font-size: 14px; margin-bottom: 14px; }
.agent-start .agent-note { font-size: 11px; line-height: 1.8; color: #c4c4c0; margin-bottom: 28px; }
.agent-step { border-top: 1px solid var(--rule); }
.agent-step:last-child { border-bottom: 1px solid var(--rule); }
.agent-step summary, .agent-step-trigger { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 23px 0; }
.agent-step-trigger { width: 100%; border: 0; background: transparent; color: inherit; text-align: left; --hcss-press-scale: .995; }
.agent-step .hcss-collapse { --hcss-duration: 280ms; }
.agent-step .hcss-collapse-body { padding: 0; }
.agent-step .hcss-collapse-body::after { content: ''; display: block; height: 28px; }
.agent-step summary::-webkit-details-marker { display: none; }
.agent-step summary:focus-visible { outline: 2px solid var(--paper); outline-offset: 4px; }
.agent-step-label { font-size: 19px; letter-spacing: -.02em; }
.agent-step-icon { font-size: 25px; color: var(--muted); line-height: 1; font-weight: 300; transition: transform var(--hcss-duration-slow) var(--hcss-ease-enter); }
.agent-step[open] .agent-step-icon, .agent-step-trigger[aria-expanded=true] .agent-step-icon { transform: rotate(45deg); }
.agent-step-body { padding: 0 0 28px; }
.prompt-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 7px 0 16px; }
.prompt-heading .eyebrow { font-size: 9px; color: var(--muted); }
.copy-prompt { border: 1px solid #555; padding: 7px 10px; font-size: 10px; background: transparent; color: var(--paper); white-space: nowrap; }
.copy-prompt:hover { border-color: var(--paper); }
.agent-prompt { margin: 0 0 24px; padding: 0 0 0 20px; border-left: 1px solid #686862; white-space: pre-line; overflow-wrap: anywhere; color: var(--paper); font-size: 14px; line-height: 1.85; }
.agent-start .agent-expect { font-size: 12px; line-height: 1.8; margin: 0; }
.agent-expect strong { display: block; margin-bottom: 8px; font-size: 9px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--paper); }
.agent-step .text-link { margin-top: 18px; font-size: 11px; }
.agent-start .agent-rules { margin: 30px 0 18px; font-size: 16px; color: var(--paper); letter-spacing: -.01em; }
@media (max-width: 1000px) { .agent-start { grid-template-columns: .8fr 1.2fr; gap: 6%; } }
@media (max-width: 700px) {
  .agent-start { grid-template-columns: 1fr; gap: 30px; }
  .agent-start-heading { position: static; }
  .agent-start-heading h2 { font-size: 46px; }
  .agent-start .agent-intro { font-size: 18px; }
  .agent-step-label { font-size: 18px; }
  .agent-prompt { font-size: 13px; padding-left: 14px; }
  .prompt-heading { gap: 12px; }
}

/* Shared translucent backing for supporting text and reading panels. */
.site-label,
.subdued,
#fluid-toggle,
.hero-aside > p:not(.eyebrow),
.promise-note,
.tour-heading > p,
.demo-notes > label,
.steps,
.demo-caption,
#terminal-title,
.terminal-bar > .eyebrow,
#output,
.position,
#provenance,
.provenance a,
.record-copy > p + p,
.file-row > span,
footer > span,
footer > div > a,
.agent-prompt,
.agent-start .agent-note,
.prompt-heading > .eyebrow {
  background-color: rgb(0 0 0 / 60%);
  padding: 5px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
footer > div { flex-wrap: wrap; row-gap: 12px; }

/* HoloCSS controls share the page typography and motion tokens. */
.recording-selector { position: relative; min-width: 0; }
.hcss-custom-select-trigger { display: flex; align-items: center; justify-content: space-between; gap: 10px; width: 100%; background: transparent; color: var(--paper); border: 0; border-bottom: 1px solid #484846; border-radius: 0; padding: 12px 2px 12px 0; font-size: 13px; text-align: left; }
.hcss-custom-select-trigger::after { content: '⌄'; transition: rotate var(--hcss-duration-normal) var(--hcss-ease-enter); }
.hcss-custom-select-trigger[aria-expanded=true]::after { rotate: 180deg; }
.hcss-selection-popup { position: fixed; width: min(280px, calc(100vw - 40px)); z-index: 20; background: rgb(0 0 0 / 85%); border: 1px solid #484846; padding: 5px; font-size: 13px; --hcss-duration: 180ms; --hcss-distance: 8px; }
.hcss-selection-popup[hidden] { display: none; }
.hcss-listbox-option { padding: 12px 10px; cursor: pointer; transition: background-color var(--hcss-duration-fast) var(--hcss-ease-enter), color var(--hcss-duration-fast); }
.hcss-listbox-option[aria-selected=true] { color: #00df81; }
.hcss-listbox-option:hover, .hcss-listbox-option[data-active], .hcss-listbox-option[data-hcss-active] { background: rgb(255 255 255 / 10%); }
.step { transition: color var(--hcss-duration-normal) var(--hcss-ease-enter), border-color var(--hcss-duration-normal) var(--hcss-ease-enter); }
.terminal { --hcss-duration: 180ms; }
@media (prefers-reduced-motion: reduce) { .agent-step-icon, .hcss-custom-select-trigger::after { transition: none; } }