/* witharosa.ai: inherits the HyatusOS monochrome contract. Tokens are OKLCH; the night view is the default. */
:root {
  --mono-50: oklch(0.985 0 0); --mono-100: oklch(0.97 0 0); --mono-200: oklch(0.922 0 0); --mono-300: oklch(0.87 0 0);
  --mono-400: oklch(0.708 0 0); --mono-500: oklch(0.556 0 0); --mono-600: oklch(0.439 0 0); --mono-700: oklch(0.371 0 0);
  --mono-800: oklch(0.269 0 0); --mono-900: oklch(0.205 0 0); --mono-950: oklch(0.145 0 0);
  --bg: oklch(0.978 0 0); --surface: oklch(1 0 0); --surface-2: oklch(0.962 0 0); --surface-3: oklch(0.935 0 0);
  --ink: oklch(0.17 0 0); --ink-muted: oklch(0.44 0 0); --ink-faint: oklch(0.62 0 0); --line: oklch(0.895 0 0);
  --accent: var(--mono-900); --accent-ink: var(--mono-50);
  --success: oklch(0.52 0.13 155); --warning: oklch(0.53 0.115 100); --info: oklch(0.50 0.11 255);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --font-sans: 'Geist', 'Geist Fallback', system-ui, sans-serif; --font-mono: 'Geist Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --gutter: 1rem; --max: 80rem;
  color-scheme: light;
}
html.dark {
  --bg: oklch(0.145 0 0); --surface: oklch(0.185 0 0); --surface-2: oklch(0.22 0 0); --surface-3: oklch(0.26 0 0);
  --ink: oklch(0.96 0 0); --ink-muted: oklch(0.74 0 0); --ink-faint: oklch(0.56 0 0); --line: oklch(0.27 0 0);
  --accent: var(--mono-100); --accent-ink: oklch(0.145 0 0);
  --success: oklch(0.75 0.13 155); --warning: oklch(0.85 0.13 100); --info: oklch(0.72 0.10 255);
  color-scheme: dark;
}
@media (min-width: 640px) { :root { --gutter: 1.5rem; } }
@media (min-width: 768px) { :root { --gutter: 2.5rem; } }
@media (min-width: 1024px) { :root { --gutter: 4rem; } }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font-sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
h1, h2, h3 { font-weight: 500; margin: 0; text-wrap: balance; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 1rem; top: 1rem; z-index: 110; background: var(--ink); color: var(--bg); padding: .6rem 1rem; border-radius: .5rem; transform: translateY(-200%); }
.skip:focus { transform: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* Nav */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 50; border-bottom: 1px solid transparent; background: color-mix(in oklch, var(--bg) 85%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: border-color .3s var(--ease); }
.nav.scrolled, .nav.open { border-color: var(--line); }
.nav.open { background: var(--bg); }
.nav .bar { height: 3.5rem; display: flex; align-items: center; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: .625rem; font-size: .875rem; font-weight: 500; flex-shrink: 0; }
.brand svg { width: 1.5rem; height: 1.5rem; }
.nav-links { display: none; align-items: center; gap: 1.5rem; }
.nav-links a { font-size: .875rem; color: var(--ink-muted); white-space: nowrap; transition: color .2s var(--ease); }
.nav-links a:hover { color: var(--ink); }
.nav .right { margin-left: auto; display: flex; align-items: center; gap: .5rem; }
.icon-btn { display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border-radius: .5rem; color: var(--ink-muted); transition: color .2s var(--ease), background-color .2s var(--ease); }
.icon-btn:hover { color: var(--ink); background: var(--surface-2); }
.icon-btn svg { width: 1.1rem; height: 1.1rem; }
.icon-btn svg[hidden] { display: none; }
.btn { display: inline-flex; align-items: center; gap: .5rem; border-radius: .5rem; padding: .625rem 1.25rem; font-size: .875rem; font-weight: 500; line-height: 1.25; transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease); white-space: nowrap; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in oklch, var(--accent) 85%, transparent); }
.btn-ghost { color: var(--ink); gap: .375rem; padding-left: 0; padding-right: 0; }
.btn-ghost:hover { color: var(--ink-muted); }
.btn-ghost svg { width: 1rem; height: 1rem; transition: transform .2s var(--ease); }
.btn-ghost:hover svg { transform: translateX(2px); }
.btn-outline { border: 1px solid var(--line); background: var(--surface); color: var(--ink); }
.btn-outline:hover { border-color: color-mix(in oklch, var(--ink) 30%, transparent); }
.nav .cta { display: none; }
.burger { display: grid; }
.menu { display: none; border-top: 1px solid var(--line); padding: .75rem 0 1rem; }
.nav.open .menu { display: block; }
.menu a { display: block; padding: .6rem 0; font-size: .95rem; color: var(--ink-muted); }
.menu a:hover { color: var(--ink); }
@media (min-width: 1024px) { .nav-links { display: flex; } .nav .cta { display: inline-flex; } .burger { display: none; } .nav.open .menu { display: none; } }

/* Sections */
section { padding: 6rem 0; }
section + section, footer { border-top: 1px solid var(--line); }
@media (min-width: 768px) { section { padding: 8rem 0; } }
.kicker { display: inline-flex; align-items: center; gap: .625rem; font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-muted); }
.kicker::before { content: ''; width: .375rem; height: .375rem; background: color-mix(in oklch, var(--ink) 40%, transparent); transform: rotate(45deg); }
.h2 { margin-top: 1.25rem; font-size: 2.25rem; line-height: 1.05; max-width: 22ch; }
@media (min-width: 768px) { .h2 { font-size: 3rem; } }
.lede { margin-top: 1.5rem; max-width: 36rem; color: var(--ink-muted); font-size: 1.0625rem; line-height: 1.65; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in, html.no-motion .reveal { opacity: 1; transform: none; }

/* Hero */
.hero { padding-top: 7rem; padding-bottom: 4rem; }
@media (min-width: 768px) { .hero { padding-top: 9rem; padding-bottom: 5rem; } }
.hero h1 { font-size: 2.75rem; line-height: 1.02; letter-spacing: -0.03em; max-width: 14ch; }
@media (min-width: 640px) { .hero h1 { font-size: 3.75rem; } }
@media (min-width: 1024px) { .hero h1 { font-size: 4.5rem; max-width: 15ch; } }
.hero .lede { margin-top: 1.5rem; max-width: 38rem; }
.actions { margin-top: 2rem; display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1.25rem; }
.facts { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); display: grid; gap: 1.5rem; }
@media (min-width: 640px) { .facts { grid-template-columns: repeat(3, 1fr); } }
.facts div { display: flex; flex-direction: column; gap: .375rem; }
.facts dd { margin: 0; font-size: 1.5rem; font-weight: 500; letter-spacing: -0.02em; }
.facts dt { font-size: .75rem; color: var(--ink-muted); line-height: 1.4; }

/* Product window */
.window { margin-top: 3rem; border: 1px solid var(--line); background: var(--surface); border-radius: .75rem; overflow: hidden; box-shadow: 0 24px 64px -32px color-mix(in oklch, var(--ink) 28%, transparent); }
.window .chrome { display: flex; align-items: center; gap: .75rem; border-bottom: 1px solid var(--line); background: var(--surface-2); padding: .625rem 1rem; font-size: .75rem; color: var(--ink-muted); }
.chrome .dots { display: flex; gap: .375rem; }
.chrome .dots span { width: .625rem; height: .625rem; border-radius: 50%; background: color-mix(in oklch, var(--ink) 15%, transparent); }
.chrome .title { font-family: var(--font-mono); color: var(--ink); }
.chrome .state { margin-left: auto; display: inline-flex; align-items: center; gap: .5rem; }
.live { width: .5rem; height: .5rem; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 3px color-mix(in oklch, var(--success) 20%, transparent); }
.chip { border: 1px solid var(--line); border-radius: .375rem; padding: .125rem .5rem; font-size: .6875rem; }
.session { display: grid; grid-template-columns: 1fr; }
@media (min-width: 768px) { .session { grid-template-columns: 15rem 1fr; } }
.steps { display: flex; gap: .25rem; overflow-x: auto; border-bottom: 1px solid var(--line); padding: .5rem; }
@media (min-width: 768px) { .steps { flex-direction: column; overflow: visible; border-bottom: 0; border-right: 1px solid var(--line); } }
.step { display: grid; grid-template-columns: 1.25rem 1fr; gap: .625rem; align-items: start; text-align: left; padding: .625rem .75rem; border-radius: .5rem; min-width: 12rem; transition: background-color .2s var(--ease); }
@media (min-width: 768px) { .step { min-width: 0; } }
.step:hover { background: var(--surface-2); }
.step[aria-current="step"] { background: var(--surface-2); }
.step .mark { width: 1.25rem; height: 1.25rem; border-radius: 50%; border: 1px solid var(--line); display: grid; place-items: center; margin-top: .125rem; }
.step.done .mark { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.step.done .mark::after { content: ''; width: .35rem; height: .6rem; border: solid currentColor; border-width: 0 1.5px 1.5px 0; transform: translateY(-1px) rotate(45deg); }
.step[aria-current="step"] .mark { border-color: color-mix(in oklch, var(--ink) 25%, transparent); border-top-color: var(--ink); animation: spin 1s linear infinite; }
.step .t { font-family: var(--font-mono); font-size: .6875rem; color: var(--ink-muted); display: block; }
.step .n { font-size: .875rem; color: var(--ink); display: block; line-height: 1.3; }
.pane { display: grid; grid-template-columns: 1fr; gap: 0; min-height: 22rem; }
@media (min-width: 1024px) { .pane { grid-template-columns: 1fr 19rem; } }
.transcript { padding: 1.25rem; display: flex; flex-direction: column; gap: .875rem; }
.line { display: grid; grid-template-columns: 5.5rem 1fr; gap: .75rem; font-size: .875rem; opacity: 0; transform: translateY(6px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.line.in, html.no-motion .line { opacity: 1; transform: none; }
.line .who { font-family: var(--font-mono); font-size: .6875rem; color: var(--ink-muted); text-transform: uppercase; letter-spacing: .08em; padding-top: .2rem; }
.line .body { color: var(--ink); line-height: 1.5; }
.line .body .cite { font-family: var(--font-mono); font-size: .6875rem; color: var(--ink-muted); border: 1px solid var(--line); border-radius: .25rem; padding: 0 .3rem; margin-left: .25rem; }
.line.user .body { color: var(--ink-muted); }
.line .tool { display: inline-flex; align-items: center; gap: .5rem; font-family: var(--font-mono); font-size: .75rem; color: var(--ink-muted); border: 1px solid var(--line); border-radius: .375rem; padding: .25rem .5rem; background: var(--surface-2); }
.model { border-top: 1px solid var(--line); background: var(--surface-2); padding: 1rem; display: flex; flex-direction: column; gap: .75rem; }
@media (min-width: 1024px) { .model { border-top: 0; border-left: 1px solid var(--line); } }
.model .label { font-family: var(--font-mono); font-size: .6875rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-muted); display: flex; justify-content: space-between; }
.model svg { width: 100%; height: auto; display: block; }
.model .readout { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem .75rem; font-size: .75rem; color: var(--ink-muted); }
.model .readout b { display: block; font-weight: 500; color: var(--ink); font-size: .9375rem; font-variant-numeric: tabular-nums; }
.storey { fill: var(--surface); stroke: var(--ink); stroke-width: 1; opacity: 0; transition: opacity .4s var(--ease); }
.storey.in { opacity: 1; }
.lotline { fill: none; stroke: var(--ink-faint); stroke-dasharray: 3 3; }
.neighbour { fill: color-mix(in oklch, var(--ink) 8%, transparent); stroke: color-mix(in oklch, var(--ink) 20%, transparent); }
.existing { transition: opacity .5s var(--ease); }
@keyframes spin { to { transform: rotate(360deg); } }

/* One state */
.split { display: grid; gap: 3rem; align-items: start; }
@media (min-width: 1024px) { .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 3rem; } }
@media (min-width: 1280px) { .split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 4rem; } }
.graph { border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); padding: 1rem; }
.graph svg { width: 100%; height: auto; display: block; }
.node rect { fill: var(--surface); stroke: var(--line); stroke-width: 1; transition: stroke .4s var(--ease), fill .4s var(--ease); }
.node text { font-family: var(--font-sans); font-size: 13px; font-weight: 500; fill: var(--ink); }
.node .sub { font-family: var(--font-mono); font-size: 9.5px; fill: var(--ink-muted); letter-spacing: .03em; }
.node.state rect { stroke: var(--ink); stroke-width: 1.25; }
.node.stale rect { stroke: var(--warning); stroke-dasharray: 3 3; }
.node.fresh rect { stroke: var(--ink); }
.edge { fill: none; stroke: var(--line); stroke-width: 1; transition: stroke .4s var(--ease); }
.edge.hot { stroke: var(--ink); }
.graph .controls { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.graph .controls .note { font-size: .75rem; color: var(--ink-muted); margin-left: auto; }
.chipbtn { border: 1px solid var(--line); border-radius: .375rem; padding: .35rem .625rem; font-size: .8125rem; color: var(--ink); background: var(--surface); transition: border-color .2s var(--ease), background-color .2s var(--ease); }
.chipbtn:hover { border-color: color-mix(in oklch, var(--ink) 30%, transparent); }
.chipbtn[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }

/* Skills ledger */
.ledger { margin-top: 3rem; display: grid; gap: 0; border-top: 1px solid var(--line); }
@media (min-width: 1024px) { .ledger { grid-template-columns: 1fr 1fr; column-gap: 4rem; } }
.ledger h3 { font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-muted); padding: 1.25rem 0 .5rem; }
.skill { display: grid; grid-template-columns: 2rem 1fr; gap: .75rem; padding: .9rem 0; border-bottom: 1px solid var(--line); }
.skill .num { font-family: var(--font-mono); font-size: .75rem; color: var(--ink-muted); padding-top: .2rem; font-variant-numeric: tabular-nums; }
.skill .name { font-size: .95rem; font-weight: 500; }
.skill .desc { font-size: .875rem; color: var(--ink-muted); line-height: 1.5; margin-top: .125rem; }
.skill.next .name { color: var(--ink-muted); font-weight: 400; }

/* Workflow */
.flow { margin-top: 3rem; display: grid; gap: 2rem; }
@media (min-width: 1024px) { .flow { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 4rem; align-items: start; } }
.flow ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.flow li { border-top: 1px solid var(--line); }
.flow li:last-child { border-bottom: 1px solid var(--line); }
.flow button { width: 100%; text-align: left; display: grid; grid-template-columns: 2.5rem 1fr; gap: 1rem; padding: 1.125rem 0; align-items: start; }
.flow .num { font-family: var(--font-mono); font-size: .75rem; color: var(--ink-muted); padding-top: .25rem; }
.flow .name { font-size: 1.0625rem; font-weight: 500; transition: color .2s var(--ease); }
.flow li:not(.on) .name { color: var(--ink-muted); }
.flow li:not(.on) button:hover .name { color: var(--ink); }
.flow .desc { display: grid; grid-template-rows: 0fr; opacity: 0; transition: grid-template-rows .5s var(--ease), opacity .5s var(--ease); }
.flow .desc > span { overflow: hidden; display: block; font-size: .9rem; color: var(--ink-muted); line-height: 1.55; padding-top: .25rem; }
.flow li.on .desc { grid-template-rows: 1fr; opacity: 1; }
.vignette { position: sticky; top: 5rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); padding: 1.25rem; min-height: 14rem; }
.vignette .label { font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-muted); }
.vignette ul { list-style: none; margin: 1rem 0 0; padding: 0; display: flex; flex-direction: column; gap: .625rem; }
.vignette li { display: flex; gap: .75rem; align-items: flex-start; font-size: .9rem; line-height: 1.5; opacity: 0; transform: translateY(6px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.vignette li.in, html.no-motion .vignette li { opacity: 1; transform: none; }
.vignette li::before { content: ''; flex: none; margin-top: .55rem; width: .375rem; height: .375rem; transform: rotate(45deg); background: color-mix(in oklch, var(--ink) 40%, transparent); }
.progress { margin-top: 1.25rem; height: 2px; background: var(--line); overflow: hidden; border-radius: 1px; }
.progress span { display: block; height: 100%; width: 100%; background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform linear; }

/* Sources */
.sources { margin-top: 3rem; display: grid; gap: 0; border-top: 1px solid var(--line); }
@media (min-width: 768px) { .sources { grid-template-columns: 1fr 1fr; column-gap: 4rem; } }
.source { display: grid; grid-template-columns: minmax(0, 11rem) 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); font-size: .9rem; }
.source .org { font-weight: 500; }
.source .what { color: var(--ink-muted); line-height: 1.5; }
.principles { margin-top: 2rem; display: grid; gap: 1.5rem; }
@media (min-width: 768px) { .principles { grid-template-columns: repeat(3, 1fr); } }
.principles p { font-size: .9rem; color: var(--ink-muted); line-height: 1.55; }
.principles strong { display: block; color: var(--ink); font-weight: 500; margin-bottom: .25rem; }

/* Marquee */
.tape { padding: 0; overflow: hidden; user-select: none; position: relative; }
.tape .row { display: flex; width: max-content; animation: tapeLeft 48s linear infinite; }
.tape .row.alt { animation: tapeRight 38s linear infinite; }
.tape .row:hover { animation-play-state: paused; }
.tape .row + .row { border-top: 1px solid var(--line); }
.tape .item { display: flex; align-items: center; gap: 1.5rem; padding: 1rem 2rem; border-right: 1px solid var(--line); font-size: .875rem; letter-spacing: .02em; color: var(--ink-muted); white-space: nowrap; }
.tape .item::before { content: ''; width: .375rem; height: .375rem; transform: rotate(45deg); background: color-mix(in oklch, var(--ink) 25%, transparent); }
.tape .row.alt .item::before { background: color-mix(in oklch, var(--ink) 15%, transparent); }
.tape::before, .tape::after { content: ''; position: absolute; top: 0; bottom: 0; width: 6rem; pointer-events: none; z-index: 1; }
.tape::before { left: 0; background: linear-gradient(to right, var(--bg), transparent); }
.tape::after { right: 0; background: linear-gradient(to left, var(--bg), transparent); }
@keyframes tapeLeft { from { transform: translateX(0); } to { transform: translateX(-33.333%); } }
@keyframes tapeRight { from { transform: translateX(-33.333%); } to { transform: translateX(0); } }

/* Access + CTA */
.access { display: grid; gap: 2rem; }
@media (min-width: 640px) { .access { grid-template-columns: 1fr 1fr; gap: 3rem; } }
@media (min-width: 1024px) { .access { grid-template-columns: 1fr; gap: 2rem; } }
@media (min-width: 1280px) { .access { grid-template-columns: 1fr 1fr; gap: 3rem; } }
.access .cell { border-top: 1px solid var(--line); padding-top: 1.25rem; }
.access h3 { font-size: 1.125rem; }
.access p { margin-top: .5rem; color: var(--ink-muted); font-size: .95rem; line-height: 1.55; }
.cta-box { border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); padding: 1.5rem; }
.cta-box .label { font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-muted); }
.cta-box ul { list-style: none; padding: 0; margin: 1rem 0 1.5rem; display: flex; flex-direction: column; gap: .625rem; font-size: .9rem; color: var(--ink-muted); }
.cta-box li { display: flex; gap: .75rem; align-items: center; }
.cta-box li::before { content: ''; width: .375rem; height: .375rem; transform: rotate(45deg); background: color-mix(in oklch, var(--ink) 40%, transparent); }
.cta-box .buttons { display: flex; flex-wrap: wrap; gap: .75rem; }
.cta-box .fine { margin-top: 1rem; font-size: .75rem; color: var(--ink-muted); }

/* Footer */
footer { padding: 3rem 0; }
.foot { display: grid; gap: 2.5rem; }
@media (min-width: 768px) { .foot { grid-template-columns: minmax(0, 1fr) auto auto; gap: 5rem; } }
.foot p { margin-top: 1rem; max-width: 20rem; font-size: .875rem; color: var(--ink-muted); line-height: 1.55; }
.foot h3 { font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-muted); }
.foot ul { list-style: none; margin: 1rem 0 0; padding: 0; display: flex; flex-direction: column; gap: .625rem; }
.foot li a { font-size: .875rem; color: var(--ink-muted); transition: color .2s var(--ease); }
.foot li a:hover { color: var(--ink); }
footer .bottom { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; font-size: .75rem; color: var(--ink-muted); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .line, .vignette li, .storey { opacity: 1 !important; transform: none !important; transition: none !important; }
  .tape .row { animation: none !important; }
  .step[aria-current="step"] .mark { animation: none; }
}