:root {
  color-scheme: dark;
  --bg: #000000;
  --surface: #000000;
  --surface-raised: #101010;
  --text: #f3f3f3;
  --muted: #ababab;
  --quiet: #898989;
  --accent: #00efc6;
  --amber: #eab308;
  --line: #2b2b2b;
  --white: #ffffff;
  --black: #000000;
  --ink: #000000;
  --sans: 'Manrope', Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}
* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; scroll-padding-top: 112px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: var(--accent); color: var(--ink); }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
a, button, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button, summary { cursor: pointer; }
button { color: inherit; }
p, h1, h2, h3, figure, ol { margin: 0; }
h1, h2, h3 { font-weight: 500; }
img { display: block; max-width: 100%; }
button, a, summary, input, textarea { outline-color: var(--accent); outline-offset: 6px; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); }
.shell { width: calc(100% - 112px); max-width: 1264px; margin-inline: auto; }
.eyebrow { font-size: 12px; color: var(--muted); letter-spacing: .015em; }
.skip { position: fixed; top: 14px; left: 16px; z-index: 100; padding: 12px 22px; background: var(--text); color: var(--ink); border-radius: 999px; transform: translateY(-200%); }
.skip:focus { transform: none; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 22px; min-height: 52px; padding: 13px 25px; border: 1px solid transparent; border-radius: 999px; font-size: 12px; font-weight: 650; line-height: 1.5; white-space: nowrap; transition: background .25s, border-color .25s, transform .25s, box-shadow .25s; }
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }
.button-light { color: var(--ink); background: var(--accent); box-shadow: 0 4px 18px color-mix(in srgb, var(--black) 10%, transparent); }
.button-light:hover { background: #16d0c4; box-shadow: 0 8px 30px color-mix(in srgb, var(--accent) 12%, transparent); }
.button-ghost { background: color-mix(in srgb, var(--white) 3%, transparent); border-color: color-mix(in srgb, var(--white) 17%, transparent); }
.button-ghost:hover { background: color-mix(in srgb, var(--white) 7%, transparent); border-color: color-mix(in srgb, var(--white) 35%, transparent); }
.button:disabled { opacity: .55; cursor: wait; transform: none; }
.text-link { display: inline-flex; align-items: center; gap: 15px; font-size: 12px; color: var(--muted); padding-block: 10px; }
.text-link > span { font-size: 20px; }
.text-link:hover { color: var(--text); }
.nav { position: sticky; top: 0; z-index: 30; height: 88px; background: var(--bg); }
.nav-inner { height: 100%; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; gap: 8px; align-items: baseline; font-size: 24px; font-weight: 750; letter-spacing: -1.3px; }
.brand > span { font-size: 26px; color: var(--accent); font-weight: 400; }
.nav-work { display: flex; gap: 35px; margin-left: auto; font-size: 12px; color: var(--muted); }
.nav-work a:hover, .nav-work a.active { color: var(--text); }
.nav-contact { min-height: 44px; padding: 10px 20px; gap: 19px; font-size: 11px; }
.progress { height: 1px; width: 0; background: color-mix(in srgb, var(--accent) 50%, transparent); }
.hero { display: grid; grid-template-columns: 1.2fr .8fr; column-gap: 70px; padding-top: 60px; }
.hero .eyebrow { display: flex; align-items: center; gap: 10px; }
.status-dot, .kernel-dot { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 7%, transparent); flex: none; }
h1 { font-size: clamp(100px, 11vw, 158px); letter-spacing: -.078em; line-height: .96; margin: 36px 0 31px; font-weight: 520; }
.name-dot { color: var(--accent); }
.hero-description { color: var(--muted); font-size: 19px; letter-spacing: -.015em; line-height: 1.65; max-width: 530px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 31px; }
.hero-actions .button { font-size: 12px; padding-inline: 22px; gap: 18px; }
.hero-person { width: 330px; justify-self: end; align-self: center; margin: 26px 25px 0 0; }
.portrait { position: relative; border-radius: 29px; transform: rotate(3deg); box-shadow: 0 35px 75px color-mix(in srgb, var(--black) 32%, transparent); }
.portrait img { width: 100%; height: auto; border-radius: inherit; filter: saturate(.7); }
.portrait figcaption { position: absolute; right: -17px; bottom: -17px; background: var(--text); color: var(--ink); padding: 10px 22px; border-radius: 999px; font-size: 12px; transform: rotate(-6deg); box-shadow: 0 6px 25px color-mix(in srgb, var(--black) 20%, transparent); }
.portrait-caption { font-size: 13px; line-height: 1.75; color: var(--text); margin: 43px 0 0 18px; }
.portrait-caption span { color: var(--quiet); }
.hero-foot { grid-column: 1/-1; display: flex; justify-content: space-between; align-items: center; gap: 30px; margin-top: 68px; padding: 28px 0; border-top: 1px solid var(--line); color: var(--quiet); font-size: 11px; }
.hero-foot a { display: flex; gap: 25px; color: var(--muted); }
.hero-foot a > span { color: var(--text); font-size: 18px; }
.selected { padding-top: 90px; }
.section-heading { display: flex; justify-content: space-between; align-items: start; gap: 50px; margin-bottom: 45px; }
.section-heading > .eyebrow { padding-top: 13px; }
.section-heading h2 { font-size: 41px; letter-spacing: -.045em; line-height: 1.25; width: 65%; }
.section-heading h2 span { color: var(--quiet); }
.project { border: 1px solid var(--line); border-radius: 28px; overflow: hidden; background: var(--surface); margin-top: 28px; scroll-margin-top: 110px; }
.project-top { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 26px 38px 0; font-size: 11px; }
.project-category { color: var(--muted); font-size: 11px; }
.project-status { color: var(--quiet); font-size: 10px; }
.project-status > span { color: var(--accent); margin-right: 6px; }
.project-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 25px; }
.project-brand h3 { font-size: 21px; font-weight: 650; letter-spacing: -.04em; }
.zeta-symbol { font-family: Georgia, serif; color: var(--accent); font-size: 39px; line-height: 1; font-style: italic; }
.project-title { font-size: clamp(32px, 3.1vw, 44px); line-height: 1.2; letter-spacing: -.04em; color: var(--text); font-weight: 500; }
.project-copy > p:not(.project-title) { margin-top: 24px; font-size: 13px; color: var(--muted); max-width: 380px; line-height: 1.9; }
.project-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 15px 23px; margin-top: 28px; }
.project-actions .button { font-size: 11px; min-height: 47px; padding-inline: 21px; gap: 19px; }
.zeta-feature { display: grid; grid-template-columns: 1fr 1.25fr; gap: 60px; padding: 40px 38px 27px; }
.theorem-art { position: relative; isolation: isolate; display: flex; flex-direction: column; justify-content: end; min-height: 408px; background: var(--bg); padding: 28px 33px 0; border: 1px solid var(--line); border-radius: 21px; overflow: hidden; }
.art-label { display: flex; align-items: center; gap: 10px; font-size: 10px; color: var(--accent); position: absolute; top: 27px; left: 33px; }
.theorem-mark { position: absolute; right: 55px; top: -70px; font: italic 355px Georgia, serif; color: color-mix(in srgb, var(--accent) 8%, transparent); z-index: -1; transform: rotate(-13deg); }
.theorem-number { font-size: clamp(58px, 6vw, 84px); font-weight: 500; letter-spacing: -.07em; line-height: 1.1; color: var(--text); margin: 60px 0 19px; font-variant-numeric: tabular-nums; }
.theorem-number > span { font-size: .4em; margin-left: 4px; color: var(--accent); }
.theorem-art figcaption { max-width: 355px; font-size: 12px; line-height: 1.85; color: var(--muted); }
.proof-link { margin-top: 30px; border-top: 1px solid color-mix(in srgb, var(--accent) 18%, transparent); padding: 19px 0 21px; display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 10px; }
.kernel-pair { font-weight: 600; color: var(--accent); }
.kernel-pair > span { color: var(--quiet); margin-inline: 10px; }
.proof-link > span:last-child { color: var(--muted); }
.proof-link b { color: var(--accent); font-size: 16px; font-weight: 400; margin-left: 8px; }
.proof-link:hover > span:last-child { color: var(--text); }
.proof-context { padding: 0 38px 27px; color: var(--quiet); font-size: 11px; line-height: 1.85; }
.proof-context a { color: var(--muted); text-decoration: underline; text-underline-offset: 3px; }
.study { border-top: 1px solid var(--line); }
.study > summary { display: flex; align-items: center; justify-content: space-between; gap: 25px; padding: 22px 38px; color: var(--text); font-size: 12px; list-style: none; transition: background .25s; }
.study > summary::-webkit-details-marker { display: none; }
.study > summary:hover { background: color-mix(in srgb, var(--white) 3%, transparent); }
.study > summary:focus-visible { outline-offset: -7px; border-radius: 16px; }
.summary-meta { color: var(--quiet); font-size: 10px; display: flex; align-items: center; gap: 25px; }
.summary-meta b { font-size: 22px; color: var(--muted); font-weight: 300; transition: transform .25s; }
.study[open] .summary-meta b { transform: rotate(45deg); }
.study-content { padding: 8px 38px 30px; }
.study-note { font-size: 11px; line-height: 1.8; color: var(--quiet); margin: 15px 0 5px; }
.instrument { min-width: 0; padding: 23px 26px 25px; border: 1px solid var(--line); border-radius: 19px; background: var(--bg); }
.instrument-head { display: flex; align-items: center; justify-content: space-between; font: 10px var(--mono); color: var(--muted); gap: 20px; }
.signal { color: var(--accent); }
#zplot { display: block; width: 100%; height: 270px; margin-top: 20px; }
.hud { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 25px; font: 10px var(--mono); color: var(--quiet); }
.hud em { font-style: normal; margin-right: 8px; }
.hud output { color: var(--text); }
.range-control { display: flex; align-items: center; gap: 20px; font: 10px var(--mono); color: var(--muted); margin-top: 22px; }
.range-control input { flex: 1; min-width: 0; accent-color: var(--accent); height: 26px; }
.music-project { background: var(--bg); }
.music-symbol { color: var(--accent); font-size: 31px; line-height: 1; }
.music-intro { display: grid; grid-template-columns: 1.3fr 1fr; gap: 80px; align-items: end; padding: 36px 38px 33px; }
.music-intro > div:last-child > p { font-size: 13px; color: var(--muted); line-height: 1.85; max-width: 410px; }
.music-intro .button { margin-top: 24px; font-size: 11px; min-height: 47px; }
.music-intro .project-title { font-size: 35px; }
.product-screen { display: block; margin: 0 38px; border-radius: 18px; position: relative; overflow: hidden; background: var(--bg); border: 1px solid var(--line); }
.product-screen img { width: 100%; height: auto; transition: transform .7s cubic-bezier(.2,.7,.3,1); }
.product-screen:hover img { transform: scale(1.025); }
.screen-launch { position: absolute; right: 23px; bottom: 21px; padding: 10px 19px; border: 1px solid color-mix(in srgb, var(--white) 18%, transparent); background: color-mix(in srgb, var(--black) 60%, transparent); backdrop-filter: blur(15px); border-radius: 999px; font-size: 11px; }
.product-capabilities { display: flex; flex-wrap: wrap; gap: 20px 40px; padding: 22px 38px 24px; font-size: 11px; color: var(--muted); }
.product-capabilities span:before { content: '·'; color: var(--accent); margin-right: 10px; }
.music-frame { border: 1px solid var(--line); border-radius: 18px; overflow: hidden; background: var(--bg); }
.frame-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 22px; border-bottom: 1px solid var(--line); font: 10px var(--mono); color: var(--muted); }
.frame-top span:last-child { font-size: 9px; color: var(--quiet); }
.mode-selector { display: flex; flex-wrap: wrap; gap: 7px; padding: 21px 20px 14px; }
.mode-selector button, .instrument-tabs button { min-height: 40px; padding: 10px 17px; font-size: 10px; border: 1px solid transparent; background: transparent; border-radius: 999px; color: var(--muted); transition: background .2s; }
.mode-selector button:hover, .instrument-tabs button:hover { background: var(--surface-raised); }
.mode-selector button[aria-pressed='true'] { background: var(--accent); color: var(--ink); }
.neck-scroll { overflow-x: auto; scrollbar-width: thin; scrollbar-color: var(--quiet) transparent; }
.neck { padding: 0 24px 14px; }
.neck svg { display: block; width: 100%; height: auto; max-height: 315px; }
.neck .string { stroke: var(--quiet); stroke-width: 1.2; }
.neck .string.wound { stroke-width: 1.8; }
.neck .fret { stroke: var(--line); stroke-width: 1.5; }
.neck .nut { stroke: var(--muted); stroke-width: 4; }
.neck .inlay { fill: var(--line); }
.neck text { fill: var(--muted); font-family: var(--mono); }
.neck .note circle { fill: var(--surface); stroke: var(--quiet); stroke-width: 1.2; }
.neck .note { cursor: pointer; }
.neck .note:focus-visible { outline: none; }
.neck .note:focus-visible circle { stroke: var(--amber); stroke-width: 3; }
.neck .note text { text-anchor: middle; fill: var(--text); }
.neck .note .nm { font-size: 12px; font-weight: 600; }
.neck .note .dg { font-size: 9px; fill: var(--muted); }
.neck .note.root circle { fill: var(--accent); stroke: var(--accent); }
.neck .note.root text, .neck .note.root .dg, .neck .note.lit text, .neck .note.lit .dg { fill: var(--ink); }
.neck .note.lit circle { fill: var(--text); stroke: var(--white); }
.neck .note.was circle { fill: var(--surface-raised); }
.music-frame .hud { padding: 17px 24px; border-top: 1px solid var(--line); }
.play { margin-left: auto; background: var(--accent); color: var(--ink); border: 1px solid transparent; border-radius: 999px; padding: 10px 19px; min-height: 44px; font: 11px var(--sans); cursor: pointer; }
.play:hover { background: var(--text); }
.ops-feature { display: grid; grid-template-columns: 1.05fr 1fr; gap: 70px; padding: 40px 38px 38px; }
.ops-feature h3 { font-size: 38px; line-height: 1.2; letter-spacing: -.045em; margin: 24px 0 22px; }
.ops-description { font-size: 25px; line-height: 1.5; letter-spacing: -.03em; color: var(--muted); }
.ops-copy { align-self: center; }
.ops-copy > p { font-size: 13px; color: var(--muted); line-height: 1.9; }
.ops-copy > p+p { margin-top: 14px; }
.essay-link { display: flex; align-items: center; gap: 28px; margin: 0 38px 30px; border-top: 1px solid var(--line); padding-top: 24px; font-size: 12px; }
.essay-link > span:first-child { color: var(--quiet); font-size: 10px; }
.essay-link > strong { font-weight: 500; }
.essay-link > span:last-child { margin-left: auto; font-size: 23px; color: var(--muted); }
.essay-link:hover > strong { color: var(--accent); }
.ops-study .frame { border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.machine { padding: 26px 24px; }
.states { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3,1fr); gap: 12px 23px; font: 11px var(--mono); }
.states li { position: relative; }
.states li > span { display: block; border: 1px solid var(--line); border-radius: 999px; padding: 12px; text-align: center; color: var(--muted); }
.states .on > span { background: var(--accent); color: var(--ink); border-color: transparent; }
.states .done > span { border-color: var(--quiet); }
.rail { margin-top: 26px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.rail em { display: block; font: 10px var(--mono); color: var(--accent); margin-bottom: 9px; }
.rail b { display: block; font-size: 20px; font-weight: 500; margin-bottom: 5px; }
.rail span { font-size: 12px; color: var(--muted); }
.panel { display: none; }
.machine[data-step='0'] .guards, .machine[data-step='1'] .guards, .machine[data-step='2'] .layers { display: grid; }
.guards { list-style: none; padding: 0; margin-top: 24px; grid-template-columns: 1fr 1fr; gap: 19px 30px; font-size: 12px; color: var(--muted); }
.guards li { display: grid; grid-template-columns: 22px 1fr; gap: 8px; }
.guards i { font: 9px var(--mono); color: var(--quiet); padding-top: 4px; }
.guards li.on { color: var(--text); }
.guards li.on i { color: var(--accent); }
.layers { gap: 22px; padding-top: 24px; }
.layer { display: grid; grid-template-columns: 95px 1fr; gap: 15px; }
.layer b { font: 11px var(--mono); color: var(--accent); padding-top: 5px; }
.layer span { font-size: 14px; }
.layer small { display: block; font-size: 12px; color: var(--muted); margin-top: 5px; }
.machine-note { font-size: 11px; color: var(--muted); margin: 0 24px 24px; }
.ops-study .hud { padding: 15px 24px; border-top: 1px solid var(--line); }
.stack { display: none; }
.instrument-tabs { display: flex; gap: 8px; padding: 0 19px 19px; }
.instrument-tabs button { flex: 1; }
.instrument-tabs button[aria-pressed='true'] { background: var(--surface-raised); color: var(--accent); }
.about { padding: 100px 0 95px; display: grid; grid-template-columns: minmax(110px, .42fr) minmax(260px, .9fr) minmax(0, 1.3fr); gap: 30px clamp(34px, 4vw, 65px); align-items: start; }
.about > .eyebrow { grid-column: 1; grid-row: 1 / 3; padding-top: 12px; }
.about > h2 { grid-column: 2 / -1; font-size: 47px; line-height: 1.2; letter-spacing: -.045em; }
.about-bruno { grid-column: 2; position: relative; isolation: isolate; margin: 2px 8px 10px 10px; }
.about-bruno::before { content: ''; position: absolute; z-index: -1; inset: -10px 12px 12px -10px; border: 1px solid color-mix(in srgb, var(--accent) 42%, transparent); border-radius: 30px 30px 88px 30px; background: radial-gradient(circle at 18% 10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 45%); }
.about-photo-frame { aspect-ratio: 3 / 4; overflow: hidden; border: 1px solid color-mix(in srgb, var(--white) 15%, transparent); border-radius: 25px 25px 78px 25px; background: var(--surface-raised); box-shadow: 0 28px 80px color-mix(in srgb, var(--black) 55%, transparent); transform: rotate(-1.4deg); }
.about-photo-frame img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 48%; }
.about-bruno figcaption { position: absolute; right: -17px; bottom: 24px; padding: 11px 16px 10px; border-radius: 17px; background: var(--text); color: var(--ink); box-shadow: 0 12px 35px color-mix(in srgb, var(--black) 42%, transparent); transform: rotate(2.5deg); line-height: 1.2; }
.about-bruno figcaption span { display: block; font-size: 14px; font-weight: 750; }
.about-bruno figcaption small { display: block; margin-top: 4px; font: 8px/1.2 var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.about-copy { grid-column: 3; padding-top: 2px; }
.about-copy > p { max-width: 650px; font-size: 17px; color: var(--muted); line-height: 1.8; }
.about-copy > p + p { margin-top: 18px; }
.about-copy > .about-last { color: var(--text); margin-top: 26px; }
.about-chat-link { display: inline-flex; margin-top: 28px; color: var(--accent); font-size: 14px; font-weight: 700; text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 48%, transparent); padding-bottom: 4px; }
.about-chat-link:hover, .about-chat-link:focus-visible { border-color: var(--accent); }
.invitation { background: var(--bg); border-top: 1px solid var(--line); padding: 84px 0 85px; }
.contact-heading h2 { font-size: clamp(48px, 6.5vw, 87px); letter-spacing: -.06em; line-height: 1.05; margin: 28px 0; }
.contact-heading h2 > span { color: var(--accent); }
.contact-heading > p:last-child { font-size: 17px; color: var(--muted); line-height: 1.8; }
.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; margin-top: 51px; }
.contact-aside { grid-column: 1; grid-row: 1; }
.contact-form-wrap { grid-column: 2; grid-row: 1; }
.contact-label { font-size: 12px; color: var(--muted); margin-bottom: 17px; }
.interest-options { display: flex; flex-wrap: wrap; gap: 10px; max-width: 410px; }
.interest-options a { display: inline-flex; align-items: center; justify-content: space-between; gap: 18px; padding: 11px 19px; border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent); border-radius: 999px; background: color-mix(in srgb, var(--white) 3%, transparent); font-size: 11px; transition: background .2s, color .2s; }
.interest-options a > span { font-size: 17px; color: var(--muted); }
.interest-options a:hover, .interest-options a.selected { background: var(--accent); color: var(--ink); border-color: transparent; }
.interest-options a:hover > span, .interest-options a.selected > span { color: var(--ink); }
.contact-open { font-size: 13px; color: var(--muted); max-width: 390px; line-height: 1.9; margin-top: 28px; }
.contact-social { display: flex; gap: 26px; font-size: 12px; color: var(--muted); margin-top: 30px; }
.contact-social a:hover { color: var(--text); }
.inquiry-selection { color: var(--accent); font-size: 12px; margin: 0 0 20px; }
.inquiry-selection:empty { display: none; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 18px; }
.form label { display: grid; gap: 11px; font-size: 12px; color: var(--muted); }
.form .message, .buttons, .status { grid-column: 1/-1; }
.form input, .form textarea { width: 100%; min-width: 0; border: 1px solid var(--line); border-radius: 14px; background: color-mix(in srgb, var(--white) 3%, transparent); color: var(--text); padding: 13px 16px; font: 16px/1.6 var(--sans); transition: border-color .2s, background .2s; }
.form input:focus, .form textarea:focus { border-color: var(--accent); background: color-mix(in srgb, var(--white) 5%, transparent); }
.form textarea { min-height: 156px; resize: vertical; }
.form textarea::placeholder { font-size: 13px; color: var(--quiet); }
.buttons { display: flex; }
.buttons .button { min-width: 172px; }
.status { font-size: 12px; color: var(--muted); line-height: 1.8; min-height: 1.8em; }
.status a { color: var(--text); text-decoration: underline; text-underline-offset: 4px; }
.status[data-state='sent'] { color: var(--accent); }
.more { padding-block: 55px; border-top: 1px solid var(--line); }
.more-intro { display: flex; justify-content: space-between; gap: 30px; margin-bottom: 25px; }
.more-intro > p:last-child { font-size: 12px; color: var(--quiet); }
.work-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 23px 40px; }
.work-link { display: grid; grid-template-columns: 1fr 16px; gap: 6px 12px; align-items: start; font-size: 13px; }
.work-link b { font-weight: 500; }
.work-link small { grid-column: 1; font-size: 12px; color: var(--quiet); line-height: 1.7; }
.work-link .arrow { grid-column: 2; grid-row: 1/3; color: var(--quiet); font-size: 17px; }
.work-link:hover b, .work-link:hover .arrow { color: var(--accent); }
footer { border-top: 1px solid var(--line); padding-block: 30px; }
.footer-top { display: flex; align-items: center; gap: 30px; }
.footer-top p { font-size: 12px; color: var(--quiet); }
.footer-top > a:last-child { margin-left: auto; font-size: 12px; color: var(--muted); }
.footer-note { margin-top: 20px; font-size: 12px; color: var(--quiet); }
.footer-note a { color: var(--muted); }
@media (min-width: 1700px) { .hero { padding-top: 80px; } h1 { font-size: 168px; } .hero-person { width: 355px; } }
@media (max-width: 1150px) {
  .shell { width: calc(100% - 72px); }
  .hero { gap: 35px; padding-top: 45px; }
  h1 { font-size: 12.2vw; }
  .hero-person { width: 285px; margin-right: 12px; }
  .hero-description { font-size: 17px; }
  .hero-actions .button { font-size: 11px; padding-inline: 19px; gap: 15px; }
  .project-top { padding-inline: 28px; }
  .zeta-feature { grid-template-columns: 1fr 1.15fr; gap: 30px; padding-inline: 28px; }
  .project-title { font-size: 35px; }
  .theorem-art { padding-inline: 23px; min-height: 385px; }
  .art-label { left: 23px; font-size: 9px; }
  .theorem-number { font-size: 6.3vw; }
  .proof-context { padding-inline: 28px; }
  .project-actions { gap: 12px; }
  .project-actions .text-link { font-size: 11px; }
  .music-intro { padding-inline: 28px; gap: 40px; }
  .music-intro .project-title { font-size: 30px; }
  .product-screen { margin-inline: 28px; }
  .product-capabilities { padding-inline: 28px; }
  .study > summary { padding-inline: 28px; }
  .study-content { padding-inline: 28px; }
  .ops-feature { padding-inline: 28px; gap: 40px; }
  .essay-link { margin-inline: 28px; }
  .about { grid-template-columns: 110px minmax(240px, .86fr) minmax(0, 1.2fr); gap: 28px 40px; }
  .about > h2 { font-size: 41px; }
  .contact-layout { gap: 60px; }
  .note-status { display: none; }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 88px; }
  .shell { width: calc(100% - 40px); }
  .nav { height: 72px; }
  .nav-inner { gap: 15px; }
  .nav-work { display: none; }
  .brand { font-size: 22px; }
  .nav-contact { margin-left: auto; min-height: 41px; padding: 9px 17px; font-size: 10px; gap: 16px; }
  .hero { padding-top: 31px; grid-template-columns: 1fr; gap: 0; }
  .hero .eyebrow { font-size: 10px; }
  h1 { font-size: clamp(87px, 22vw, 150px); margin: 32px 0 23px; line-height: .97; }
  .hero-description { font-size: 16px; line-height: 1.75; max-width: 500px; }
  .hero-actions { gap: 10px; margin-top: 25px; }
  .hero-actions .button { min-height: 47px; padding: 12px 18px; font-size: 10px; gap: 14px; }
  .hero-person { display: flex; align-items: center; width: 100%; gap: 24px; margin: 43px 0 0; justify-self: start; }
  .portrait { width: 132px; flex: none; border-radius: 18px; transform: rotate(-3deg); }
  .portrait figcaption { font-size: 8px; padding: 7px 12px; right: -10px; bottom: -10px; transform: rotate(6deg); }
  .portrait-caption { margin: 0; font-size: 11px; line-height: 1.85; }
  .hero-foot { margin-top: 36px; padding-block: 22px; font-size: 9px; gap: 30px; }
  .hero-foot > span { max-width: 215px; }
  .hero-foot a { gap: 10px; font-size: 9px; flex: none; }
  .hero-foot a > span { font-size: 16px; }
  .selected { padding-top: 52px; }
  .section-heading { display: block; margin-bottom: 26px; }
  .section-heading .eyebrow { padding: 0; font-size: 11px; }
  .section-heading h2 { font-size: 28px; width: auto; margin-top: 21px; letter-spacing: -.04em; }
  .project { border-radius: 23px; margin-top: 22px; scroll-margin-top: 85px; }
  .project-top { padding: 22px 23px 0; gap: 14px; }
  .project-category { font-size: 10px; }
  .project-status { font-size: 8px; text-align: right; }
  .project-status > span { margin-right: 4px; }
  .zeta-feature { grid-template-columns: 1fr; gap: 29px; padding: 28px 23px 23px; }
  .project-brand { gap: 10px; margin-bottom: 20px; }
  .project-brand h3 { font-size: 20px; }
  .zeta-symbol { font-size: 34px; }
  .project-title { font-size: 34px; line-height: 1.2; }
  .project-copy > p:not(.project-title) { font-size: 13px; margin-top: 21px; }
  .project-actions { margin-top: 23px; gap: 13px 20px; }
  .project-actions .button { min-height: 44px; font-size: 10px; padding: 11px 18px; gap: 14px; }
  .text-link { font-size: 11px; }
  .project-actions .text-link { font-size: 10px; }
  .theorem-art { padding: 22px 21px 0; min-height: 318px; border-radius: 18px; }
  .art-label { left: 21px; top: 24px; font-size: 8px; gap: 8px; }
  .theorem-mark { font-size: 290px; top: -60px; right: 20px; }
  .theorem-number { font-size: clamp(44px, 12.2vw, 79px); margin-top: 64px; margin-bottom: 15px; }
  .theorem-art figcaption { font-size: 11px; line-height: 1.85; }
  .proof-link { margin-top: 23px; padding-block: 18px; font-size: 9px; gap: 10px; }
  .kernel-pair > span { margin-inline: 6px; }
  .proof-link b { margin-left: 5px; font-size: 14px; }
  .proof-context { padding: 0 23px 24px; font-size: 10px; line-height: 1.85; }
  .study > summary { padding: 19px 23px; gap: 20px; font-size: 11px; }
  .summary-meta { font-size: 0; gap: 0; }
  .summary-meta b { font-size: 24px; }
  .study-content { padding: 3px 14px 24px; }
  .instrument { padding: 18px 13px 20px; border-radius: 14px; }
  .instrument-head { font-size: 8px; gap: 12px; }
  #zplot { height: 220px; margin-top: 17px; }
  .hud { font-size: 9px; gap: 12px; }
  .range-control { font-size: 8px; gap: 10px; margin-top: 16px; }
  .study-note { font-size: 10px; }
  .music-intro { grid-template-columns: 1fr; gap: 23px; padding: 27px 23px 25px; }
  .music-intro .project-title { font-size: 30px; }
  .music-intro > div:last-child > p { font-size: 13px; }
  .music-intro .button { margin-top: 21px; min-height: 44px; font-size: 10px; }
  .product-screen { margin-inline: 13px; border-radius: 15px; }
  .screen-launch { bottom: 12px; right: 12px; font-size: 9px; padding: 8px 12px; }
  .product-capabilities { padding: 20px 23px; gap: 8px 18px; font-size: 9px; }
  .product-capabilities span:before { margin-right: 6px; }
  .frame-top { padding: 17px 15px; font-size: 8px; gap: 12px; }
  .frame-top > span:last-child { font-size: 7px; }
  .mode-selector { gap: 6px; padding: 16px 13px; }
  .mode-selector button { font-size: 9px; padding: 10px 13px; min-height: 39px; }
  .neck { min-width: 735px; padding-inline: 16px; }
  .music-frame .hud { padding: 14px; gap: 12px; }
  .play { font-size: 10px; min-height: 42px; padding: 10px 15px; }
  .ops-feature { grid-template-columns: 1fr; padding: 30px 23px; gap: 25px; }
  .ops-feature h3 { font-size: 33px; margin: 22px 0 19px; }
  .ops-description { font-size: 23px; }
  .ops-copy > p { font-size: 13px; }
  .essay-link { margin: 0 23px 25px; padding-top: 23px; display: grid; grid-template-columns: 1fr 20px; gap: 8px 15px; font-size: 11px; }
  .essay-link > span:first-child { grid-column: 1; font-size: 9px; }
  .essay-link > strong { grid-column: 1; }
  .essay-link > span:last-child { grid-column: 2; grid-row: 1/3; }
  .machine { padding: 20px 14px; }
  .states { font-size: 8px; gap: 10px 15px; }
  .states li > span { padding: 11px 6px; }
  .states li:not(:nth-child(3n)):after { width: 15px; }
  .rail b { font-size: 18px; }
  .rail span { font-size: 11px; }
  .guards { gap: 15px 18px; font-size: 10px; }
  .guards li { grid-template-columns: 15px 1fr; gap: 6px; }
  .guards i { font-size: 8px; }
  .layer { grid-template-columns: 67px 1fr; gap: 12px; }
  .layer b { font-size: 9px; }
  .layer span { font-size: 12px; }
  .layer small { font-size: 10px; }
  .machine-note { margin: 0 14px 20px; font-size: 10px; }
  .ops-study .hud { padding-inline: 14px; }
  .instrument-tabs { padding: 0 10px 14px; gap: 6px; }
  .instrument-tabs button { font-size: 9px; padding-inline: 11px; }
  .about { padding-block: 60px; grid-template-columns: 1fr; gap: 0; }
  .about > .eyebrow { grid-column: 1; grid-row: auto; padding: 0; font-size: 11px; }
  .about > h2 { grid-column: 1; font-size: 33px; margin-top: 22px; }
  .about-bruno { grid-column: 1; width: min(82vw, 390px); margin: 31px auto 39px; }
  .about-bruno figcaption { right: -8px; bottom: 22px; }
  .about-copy { grid-column: 1; padding: 0; }
  .about-copy > p { font-size: 15px; }
  .about-copy > p + p { margin-top: 15px; }
  .about-copy > .about-last { margin-top: 21px; }
  .invitation { padding-block: 56px 45px; }
  .contact-heading .eyebrow { font-size: 10px; }
  .contact-heading h2 { font-size: clamp(40px, 10.2vw, 64px); margin: 24px 0; letter-spacing: -.05em; }
  .contact-heading > p:last-child { font-size: 15px; }
  .contact-layout { grid-template-columns: 1fr; gap: 36px; margin-top: 32px; }
  .contact-form-wrap { grid-column: 1; grid-row: 1; }
  .contact-aside { grid-column: 1; grid-row: 2; }
  .contact-label { font-size: 11px; }
  .interest-options { gap: 9px; }
  .interest-options a { padding: 10px 16px; font-size: 10px; gap: 15px; }
  .contact-open { font-size: 12px; margin-top: 23px; }
  .contact-social { margin-top: 23px; font-size: 11px; }
  .form { gap: 20px 14px; }
  .form label { font-size: 11px; gap: 9px; }
  .form input, .form textarea { border-radius: 13px; padding: 12px 13px; }
  .form textarea { min-height: 160px; }
  .form textarea::placeholder { font-size: 12px; }
  .buttons .button { min-height: 48px; font-size: 11px; }
  .status { font-size: 11px; }
  .more { padding-block: 38px; }
  .more-intro { display: block; margin-bottom: 23px; }
  .more-intro .eyebrow { font-size: 12px; }
  .more-intro > p:last-child { margin-top: 7px; font-size: 12px; }
  .work-links { grid-template-columns: 1fr 1fr; gap: 22px 20px; }
  .work-link { font-size: 13px; gap: 5px 10px; grid-template-columns: 1fr 12px; }
  .work-link small { font-size: 12px; }
  .work-link .arrow { font-size: 14px; }
  footer { padding-block: 25px; }
  .footer-top { gap: 20px; }
  .footer-top p { display: none; }
  .footer-top > a:last-child { font-size: 12px; }
  .footer-note { margin-top: 16px; }
}
@media (max-width: 370px) {
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .button { min-width: 200px; justify-content: space-between; }
  .hero-foot > span { max-width: 168px; }
  .project-status { display: none; }
  .art-label { font-size: 7px; }
  .theorem-number { font-size: 39px; }
  .guards { grid-template-columns: 1fr; }
  .contact-heading h2 { font-size: 35px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* External links use one fixed vector; primary buttons are text only. */
.link-icon { width: 14px; height: 14px; flex: none; vertical-align: middle; }
.work-link .link-icon { grid-column: 2; grid-row: 1 / 3; color: var(--quiet); margin-top: 3px; }
.essay-link > .link-icon { margin-left: auto; }
.proof-link .link-icon { margin-left: 7px; width: 12px; height: 12px; }

/* Open black surfaces, following the current Zeta Lab presentation. */
.project { border: 0; border-top: 1px solid var(--line); border-radius: 0; margin-top: 56px; }
.theorem-art, .instrument, .music-frame { border: 0; border-radius: 0; }
.theorem-mark { color: #0c0c0c; }
.button-light { box-shadow: none; }
.button-light:hover { background: #00d8b4; box-shadow: none; }
.project-top, .zeta-feature, .music-intro, .proof-context, .product-capabilities { padding-inline: 0; }
.product-screen { margin-inline: 0; border-color: var(--line); border-radius: 6px; }
.study > summary { padding-inline: 0; }
.study-content { padding-inline: 0; }

/* A compact index makes the projects visible before the long-form work. */
.nav-contact { background: var(--amber); }
.nav-contact:hover { background: #f3bd16; }
.nav-contact:focus-visible { outline-color: var(--amber); }
.work-overview { display: grid; grid-template-columns: 1fr 1.12fr 1fr; align-items: stretch; gap: 0; padding: 0; border-bottom: 1px solid var(--line); }
.hero-foot .work-preview { display: flex; flex-direction: column; position: relative; gap: 6px; padding: 22px 26px; min-width: 0; color: var(--text); }
.hero-foot .work-preview:first-child { padding-left: 0; }
.hero-foot .work-preview + .work-preview { border-left: 1px solid var(--line); }
.work-preview .preview-index { font: 9px var(--mono); color: var(--quiet); }
.work-preview strong { font-size: 20px; font-weight: 550; letter-spacing: -.025em; display: flex; align-items: baseline; gap: 16px; }
.hero-foot .work-preview .preview-description { color: var(--muted); font-size: 11px; line-height: 1.6; max-width: 310px; }
.work-preview .preview-result { color: var(--accent); font-size: 24px; letter-spacing: -.06em; font-variant-numeric: tabular-nums; }
.work-preview:hover strong { color: var(--accent); }
.work-preview:focus-visible { outline-offset: -4px; }
.work-preview img { position: absolute; width: 98px; height: 76px; object-fit: cover; object-position: 50% 46%; right: 20px; top: 26px; border-radius: 4px; }
.preview-music strong, .preview-music .preview-description { padding-right: 94px; }
.selected { padding-top: 65px; }
.section-heading { align-items: baseline; margin-bottom: 30px; }
.section-heading h2 { width: auto; font-size: 32px; }
.project-invitation { display: flex; align-items: center; justify-content: space-between; gap: 24px; border-top: 1px solid var(--line); padding: 25px 0 5px; margin-top: 22px; }
.project-invitation p { color: var(--muted); font-size: 13px; }
.project-invitation .button { min-height: 47px; font-size: 11px; }
.project-invitation .button-ghost { border-color: var(--accent); background: transparent; color: var(--accent); }
.project-invitation .button-ghost:hover { background: var(--accent); color: var(--ink); }
.plain-explainer { margin-inline: 0; }
@media (max-width: 1150px) {
  .hero-foot .work-preview { padding-inline: 18px; }
  .work-preview strong { flex-wrap: wrap; gap: 2px 12px; }
  .work-preview img { width: 76px; right: 12px; }
  .preview-music strong, .preview-music .preview-description { padding-right: 72px; }
}
@media (max-width: 760px) {
  .work-overview { grid-template-columns: 1fr; }
  .hero-foot .work-preview { padding: 19px 0; }
  .hero-foot .work-preview + .work-preview { border-left: 0; border-top: 1px solid var(--line); }
  .work-preview strong { font-size: 22px; gap: 16px; }
  .work-preview .preview-index { font-size: 10px; }
  .hero-foot .work-preview .preview-description { font-size: 12px; max-width: 340px; }
  .work-preview img { right: 0; width: 112px; height: 76px; top: 20px; }
  .preview-music strong, .preview-music .preview-description { padding-right: 124px; }
  .selected { padding-top: 45px; }
  .section-heading h2 { font-size: 27px; margin-top: 15px; }
  .project { margin-top: 38px; }
  .project-invitation { display: block; padding-top: 22px; }
  .project-invitation p { margin-bottom: 17px; font-size: 12px; }
}

.research-method { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; padding: 24px 0 30px; list-style: none; border-top: 1px solid var(--line); }
.research-method li { min-width: 0; }
.research-method li + li { border-left: 1px solid var(--line); padding-left: 30px; }
.research-method li > span { font: 9px var(--mono); color: var(--accent); }
.research-method h4 { margin: 13px 0 8px; font-size: 16px; font-weight: 550; letter-spacing: -.02em; }
.research-method p { color: var(--muted); font-size: 12px; line-height: 1.75; }
@media (max-width: 760px) {
  .research-method { grid-template-columns: 1fr; gap: 20px; }
  .research-method li + li { border-left: 0; padding-left: 0; }
  .research-method h4 { margin-top: 8px; }
}
/* The authenticated live showroom marks the real object it is explaining. */
.tealsea-voice-focus{position:relative;outline:2px solid #75f4df!important;outline-offset:7px;box-shadow:0 0 0 1px #0b1815,0 0 42px rgba(61,232,204,.32)!important}
@media(prefers-reduced-motion:no-preference){.tealsea-voice-focus{animation:tealsea-voice-focus-in .36s cubic-bezier(.2,.8,.2,1) both}@keyframes tealsea-voice-focus-in{from{outline-color:transparent;box-shadow:0 0 0 1px #0b1815,0 0 0 rgba(61,232,204,0)}to{outline-color:#75f4df;box-shadow:0 0 0 1px #0b1815,0 0 42px rgba(61,232,204,.32)}}}
@media(prefers-reduced-motion:reduce){.tealsea-voice-focus{scroll-margin-top:88px}}