/* ==========================================================================
   ARC LABS — SITE STYLES
   Ported from the brand system v1.0 (arc-labs-brand/styles.css). Token names,
   values and primitives are unchanged; prototype-only blocks (system page,
   case study, loader, page transitions) are not shipped.
   Layers: fonts → tokens → base → layout → type → primitives → brand panels →
   shared components → responsive → reduced motion.
   ========================================================================== */


/* --------------------------------------------------------------------------
   00 · FONTS — Inter Display (headlines, numerals) + Inter (body, interface)
   -------------------------------------------------------------------------- */
@font-face { font-family: "ARC Inter"; font-weight: 400; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-400.woff2") format("woff2"); }
@font-face { font-family: "ARC Inter"; font-weight: 500; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-500.woff2") format("woff2"); }
@font-face { font-family: "ARC Inter"; font-weight: 600; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-600.woff2") format("woff2"); }
@font-face { font-family: "ARC Inter Display"; font-weight: 300; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-display-300.woff2") format("woff2"); }
@font-face { font-family: "ARC Inter Display"; font-weight: 500; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-display-500.woff2") format("woff2"); }
@font-face { font-family: "ARC Inter Display"; font-weight: 600; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-display-600.woff2") format("woff2"); }


/* --------------------------------------------------------------------------
   01 · TOKENS (unchanged from the brand system)
   -------------------------------------------------------------------------- */
:root {
  color-scheme: light;

  /* Raw palette */
  --color-ink:          #17181A;
  --color-ink-raised:   #202124;
  --color-cream:        #F1EEE5;
  --color-panel:        #E8E4D9;
  --color-cream-muted:  #5E5C56;
  --color-cream-faint:  #9A978E;
  --color-cream-line:   #D5D1C6;
  --color-cream-line-2: #A8A396;
  --color-ink-muted:    #A6A49D;
  --color-ink-faint:    #5B5C61;
  --color-ink-line:     #33343A;
  --color-ink-line-2:   #55565C;

  /* Semantic */
  --color-bg:            light-dark(var(--color-cream),      var(--color-ink));
  --color-surface:       light-dark(var(--color-panel),      var(--color-ink-raised));
  --color-text:          light-dark(var(--color-ink),        var(--color-cream));
  --color-muted:         light-dark(var(--color-cream-muted),var(--color-ink-muted));
  --color-faint:         light-dark(var(--color-cream-faint),var(--color-ink-faint));
  --color-border:        light-dark(var(--color-cream-line), var(--color-ink-line));
  --color-border-strong: light-dark(var(--color-cream-line-2),var(--color-ink-line-2));
  --color-node:          var(--color-text);
  --color-node-pending:  var(--color-faint);
  --color-action-bg:     light-dark(var(--color-ink),        var(--color-cream));
  --color-action-text:   light-dark(var(--color-cream),      var(--color-ink));
  --color-selection:     light-dark(var(--color-ink),        var(--color-cream));
  --color-selection-text:light-dark(var(--color-cream),      var(--color-ink));

  /* Type */
  --font-display: "ARC Inter Display", "Inter Display", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:    "ARC Inter", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  --text-hero:    clamp(3.25rem, calc((100vw - 2 * var(--margin)) / 3.35), 7rem);
  --text-display: clamp(2.5rem, 6.4vw, 6.75rem);
  --text-h2:      clamp(2rem, 4.1vw, 4rem);
  --text-h3:      clamp(1.375rem, 1.6vw + .5rem, 1.875rem);
  --text-lead:    clamp(1.125rem, .9vw + .7rem, 1.4375rem);
  --text-body:    1rem;
  --text-small:   .875rem;
  --text-meta:    .75rem;
  --text-label:   .6875rem;
  --text-num:     clamp(2.5rem, 4.4vw, 4.5rem);

  --leading-display: .92;
  --leading-heading: 1.02;
  --leading-snug:    1.25;
  --leading-body:    1.6;

  --track-display: -.045em;
  --track-heading: -.032em;
  --track-snug:    -.015em;
  --track-label:   .14em;

  /* Space (4px base) */
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;
  --space-11: 12rem;
  --section-space: clamp(var(--space-9), 10vw, var(--space-11));

  /* Layout */
  --page-max: 1440px;
  --margin:   clamp(1rem, 4.5vw, 4rem);
  --gutter:   clamp(1rem, 1.6vw, 1.5rem);
  --cols:     4;
  --nav-h:    4rem;
  --measure:  65ch;

  /* Shape */
  --radius-sm:   2px;
  --radius-node: 50%;


  --node-xs: 6px;
  --node-sm: 8px;
  --node-md: 12px;
  --node-lg: 24px;
  --line-hair: 1px;
  --line-rule: 1.5px;

  /* Motion */
  --duration-instant:   120ms;
  --duration-fast:      200ms;
  --duration-medium:    400ms;
  --duration-open:      600ms;   /* added: Lab pop-up arch (plan motion table) */
  --duration-slow:      700ms;
  --duration-draw:      900ms;

  --ease-standard: cubic-bezier(.45, 0, .25, 1);
  --ease-enter:    cubic-bezier(.16, 1, .3, 1);
  --ease-exit:     cubic-bezier(.7, 0, .84, 0);
  --ease-span:     cubic-bezier(.65, 0, .35, 1);
  --ease-lift:     cubic-bezier(.22, 1, .36, 1);

  /* Layers */
  --z-nav: 50;
  --z-menu: 60;
  --z-cursor: 200;
}

/* Theme: Cream is the default. Ink only when the visitor picks it (DECISIONS D1). */
:root[data-theme="dark"]  { color-scheme: dark; }
:root[data-theme="light"] { color-scheme: light; }

/* Always-Ink surfaces: Elements page, Contact, menu, Lab pop-up. */
.ink, :root.ink[data-theme] { color-scheme: dark; }
.ink { background: var(--color-bg); color: var(--color-text); }
/* An always-Ink page has nothing for the theme toggle to change (DECISIONS D6). */
/* Client work keeps its own colours whatever the theme. */


/* --------------------------------------------------------------------------
   02 · BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%; text-size-adjust: 100%;
  scroll-padding-top: calc(var(--nav-h) + var(--space-5));
  background: var(--color-bg);
}
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
:where(ul, ol)[role="list"] { list-style: none; padding: 0; }
h1, h2, h3, h4 { font-weight: 600; text-wrap: balance; }
p { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
::selection { background: var(--color-selection); color: var(--color-selection-text); }

[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--color-text); outline-offset: 3px; }
.skip-link {
  position: fixed; left: var(--margin); top: var(--space-3); z-index: calc(var(--z-cursor) + 1);
  background: var(--color-action-bg); color: var(--color-action-text);
  padding: var(--space-2) var(--space-4); font-size: var(--text-small); font-weight: 500;
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}


/* --------------------------------------------------------------------------
   03 · LAYOUT — 4 / 8 / 12 columns
   -------------------------------------------------------------------------- */
.wrap {
  width: min(100% - 2 * var(--margin), var(--page-max) - 2 * var(--margin));
  margin-inline: auto;
}
.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  column-gap: var(--gutter);
}
.grid > * { grid-column: 1 / -1; min-width: 0; }
.section { position: relative; padding-block: var(--section-space); }
.lab-preview { padding-top: clamp(var(--space-8), 7vw, var(--space-9)); }
.stack > * + * { margin-top: var(--flow, var(--space-5)); }


/* --------------------------------------------------------------------------
   04 · TYPOGRAPHY
   -------------------------------------------------------------------------- */
.t-hero, .t-display, .t-h2, .t-h3 { font-family: var(--font-display); font-weight: 600; }
.t-hero    { font-size: var(--text-hero); line-height: var(--leading-display); letter-spacing: var(--track-display); }
.t-display { font-size: var(--text-display); line-height: var(--leading-display); letter-spacing: var(--track-display); }
.t-h2      { font-size: var(--text-h2); line-height: var(--leading-heading); letter-spacing: var(--track-heading); }
.t-h3      { font-size: var(--text-h3); line-height: var(--leading-snug); letter-spacing: var(--track-snug); font-weight: 500; }
.t-lead    { font-size: var(--text-lead); line-height: 1.45; letter-spacing: -.011em; }
.t-body    { font-size: var(--text-body); line-height: var(--leading-body); }
.t-small   { font-size: var(--text-small); line-height: 1.5; }
.t-meta    { font-size: var(--text-meta); line-height: 1.5; font-variant-numeric: tabular-nums; color: var(--color-muted); }
.t-muted   { color: var(--color-muted); }
.t-num {
  font-family: var(--font-display); font-weight: 300;
  font-size: var(--text-num); line-height: 1; letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
}
.label {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-label); font-weight: 500; line-height: 1.2;
  letter-spacing: var(--track-label); text-transform: uppercase;
  color: var(--color-muted);
}
.label--node::before {
  content: ""; inline-size: var(--node-xs); block-size: var(--node-xs);
  border-radius: var(--radius-node); background: var(--color-node); flex: none;
}
.label--strong { color: var(--color-text); }
.measure { max-width: var(--measure); }

/* The node as full stop. The real "." stays in the DOM for screen readers and copy/paste. */
.stop {
  display: inline-block; position: relative;
  inline-size: .26em; color: transparent;
}
.stop::after {
  content: ""; position: absolute; left: .02em; bottom: .015em;
  inline-size: .19em; block-size: .19em; border-radius: var(--radius-node);
  background: var(--color-text);
}


/* --------------------------------------------------------------------------
   05 · PRIMITIVES — node, rest rule, rail, span, frame
   -------------------------------------------------------------------------- */
.node {
  display: inline-block; flex: none;
  inline-size: var(--node, var(--node-sm)); block-size: var(--node, var(--node-sm));
  border-radius: var(--radius-node); background: var(--color-node);
}
.node--xs { --node: var(--node-xs); }
.node--md { --node: var(--node-md); }
.node--lg { --node: var(--node-lg); }
.node--pending { background: var(--color-node-pending); }

.rest-rule { position: relative; block-size: var(--node-sm); --rest-x: 0%; }
.rest-rule::before {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  block-size: var(--line-hair); background: var(--color-border-strong);
}
.rest-rule::after {
  content: ""; position: absolute; bottom: var(--line-hair); left: var(--rest-x);
  inline-size: var(--node-sm); block-size: var(--node-sm);
  border-radius: var(--radius-node); background: var(--color-node);
}

.span-svg { overflow: visible; color: var(--color-text); }
.span-path {
  fill: none; stroke: currentColor; stroke-width: var(--line-hair);
  stroke-linecap: round;
}
.span-path--rule { stroke-width: var(--line-rule); }
.span-path--faint { stroke: var(--color-border-strong); }
.span-node { fill: currentColor; }
.span-node--pending { fill: var(--color-faint); }

/* Frame: hairline rectangle; the chrome's three dots are nodes (grey browser dots). */
.frame {
  position: relative; border: var(--line-hair) solid var(--color-border-strong);
  background: var(--color-surface); overflow: hidden;
}
.frame__chrome {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: var(--space-3);
  block-size: 2rem; padding-inline: var(--space-3);
  border-bottom: var(--line-hair) solid var(--color-border-strong);
  background: var(--color-bg);
}
.frame__dots { display: flex; gap: 5px; flex: none; }
.frame__dots i {
  inline-size: var(--node-xs); block-size: var(--node-xs);
  border-radius: var(--radius-node); background: var(--color-faint);
}
.frame__url {
  font-size: var(--text-meta); color: var(--color-muted); letter-spacing: .01em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.frame__media { position: relative; aspect-ratio: var(--ratio, 16 / 10); max-width: 100%; overflow: hidden; background: var(--color-surface); }
.frame__img, .frame__video { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; object-fit: cover; object-position: top center; }
.ratio-16x10 { --ratio: 16 / 10; }
.ratio-4x5   { --ratio: 4 / 5; }
.ratio-21x9  { --ratio: 21 / 9; }


/* --------------------------------------------------------------------------
   06 · BRAND PANELS — each client's own logo on their brand colour
   (logos: assets/clients/, copies of brand-assets/; colours from brand.json)
   -------------------------------------------------------------------------- */
.brand-panel {
  position: absolute; inset: 0; display: grid; place-items: center;
  background: var(--bp-bg); overflow: hidden;
}
.brand-panel__logo {
  inline-size: var(--bp-w, 56%); block-size: auto; max-block-size: var(--bp-h, 60%); object-fit: contain;
  transition: transform var(--duration-medium) var(--ease-lift);
}
.lab-card__link:hover .brand-panel__logo, .viewer__open:hover .brand-panel__logo { transform: scale(1.04); }


/* --------------------------------------------------------------------------
   07 · SHARED COMPONENTS
   -------------------------------------------------------------------------- */

/* Buttons — a node leads the label. Hover changes fill (static state change). */
.btn {
  --btn-node: var(--node-xs);
  position: relative; display: inline-flex; align-items: center; gap: var(--space-3);
  min-block-size: 3rem; padding: 0 var(--space-5);
  font-size: var(--text-small); font-weight: 500; letter-spacing: .01em; line-height: 1;
  border: var(--line-hair) solid var(--color-text);
  background: var(--color-action-bg); color: var(--color-action-text);
  transition: background var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
  white-space: nowrap;
}
.btn::before {
  content: ""; inline-size: var(--btn-node); block-size: var(--btn-node); flex: none;
  border-radius: var(--radius-node); background: currentColor;
}
.btn:hover { background: transparent; color: var(--color-text); }
.btn--ghost { background: transparent; color: var(--color-text); border-color: var(--color-border-strong); }
.btn--ghost:hover { border-color: var(--color-text); background: var(--color-action-bg); color: var(--color-action-text); }
.btn--sm { min-block-size: 2.25rem; padding-inline: var(--space-3); font-size: var(--text-meta); }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; }

/* Links — a faint rail at rest, solid on hover (colour change only). */
.link {
  text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .28em;
  text-decoration-color: var(--color-border-strong);
  transition: text-decoration-color var(--duration-fast) var(--ease-standard);
}
.link:hover, .link:focus-visible { text-decoration-color: currentColor; }

/* Margin note: a short hairline-boxed phrase at a slight angle. Max one per section. */
.margin-note {
  display: inline-block; padding: var(--space-1) var(--space-3);
  border: var(--line-hair) solid var(--color-border-strong);
  font-size: var(--text-small); font-weight: 500; line-height: 1.4; letter-spacing: -.005em;
  color: var(--color-text); background: var(--color-bg);
  transform: rotate(var(--tilt, -2.5deg)); transform-origin: left center;
  white-space: nowrap;
}

/* File stamp: FILE 01 · LIVE */
.file-stamp {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 3px var(--space-2); border: var(--line-hair) solid currentColor;
  outline: var(--line-hair) solid currentColor; outline-offset: 2px;
  font-size: var(--text-label); font-weight: 500; line-height: 1.3;
  letter-spacing: var(--track-label); text-transform: uppercase; font-variant-numeric: tabular-nums;
  color: var(--color-text); background: var(--color-bg); white-space: nowrap;
}
.file-stamp .node { --node: var(--node-xs); }
.file-stamp[data-status="ready"] .node { background: var(--color-node-pending); }

/* Lockup */
.lockup { display: inline-flex; align-items: center; gap: .7em; font-family: var(--font-display); font-weight: 600; font-size: .9375rem; letter-spacing: .2em; text-transform: uppercase; white-space: nowrap; }
.lockup__mark { display: block; inline-size: 2.05em; block-size: auto; aspect-ratio: 194 / 136; color: var(--color-text); flex: none; }
.lockup__mark svg { inline-size: 100%; block-size: 100%; }
/* The mark's round nodes touch its viewBox edge: never clip them, wherever it is used. */
svg:has(> use[href="#arc-mark"]) { overflow: visible; }

/* Toggles (theme, motion) — state changes are instant. */
.toggle {
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-block-size: 2.25rem; padding-inline: var(--space-3);
  border: var(--line-hair) solid var(--color-border-strong);
  font-size: var(--text-meta); font-weight: 500; letter-spacing: .04em; color: var(--color-text);
  transition: border-color var(--duration-fast) var(--ease-standard);
}
.toggle:hover { border-color: var(--color-text); }
.toggle__swatch { position: relative; inline-size: 1.75rem; block-size: .5rem; }
.toggle__swatch i { position: absolute; top: 0; inline-size: .5rem; block-size: .5rem; border-radius: var(--radius-node); background: var(--color-text); }
.toggle__swatch i:first-child { left: 0; }
.toggle__swatch i:last-child { right: 0; opacity: .25; }
:root[data-theme="dark"] .toggle--theme .toggle__swatch i:first-child { opacity: .25; }
:root[data-theme="dark"] .toggle--theme .toggle__swatch i:last-child { opacity: 1; }
.toggle--plain { border-color: transparent; padding-inline: 0; color: var(--color-muted); }
.toggle--plain:hover { border-color: transparent; color: var(--color-text); }
.toggle .node { --node: var(--node-xs); background: var(--color-faint); }
.toggle[aria-pressed="true"] .node { background: var(--color-text); }
.toggle[aria-pressed="true"] { color: var(--color-text); }

/* Section intro: label with node, title, intro. */
.section-intro { display: grid; gap: var(--space-5); }
.section-intro__title { max-width: 18ch; }
.section-intro__body { max-width: 36rem; color: var(--color-muted); }
.section-intro__body p + p { margin-top: var(--space-3); }

/* Cursor tag — follows the pointer with a slight lag; only over tagged targets. */
.cursor-tag {
  position: fixed; left: 0; top: 0; z-index: var(--z-cursor); pointer-events: none;
  padding: 3px var(--space-2);
  background: var(--color-ink); color: var(--color-cream);
  outline: var(--line-hair) solid var(--color-cream);
  font: 500 var(--text-label) / 1.3 var(--font-body); letter-spacing: var(--track-label); text-transform: uppercase;
  white-space: nowrap; opacity: 0;
  transition: opacity var(--duration-instant) var(--ease-standard);
}
.cursor-tag.is-on { opacity: 1; }

/* Cursor — standard shapes in brand colours, fine pointers only (set on <html> by main.js).
   Ink fill with a Cream edge; on Ink surfaces the colours swap. */
html.has-cursor {
  --cur-arrow: url("/assets/cursors/arrow.svg") 4 3; --cur-link: url("/assets/cursors/link.svg") 14 2;
  --cur-grab: url("/assets/cursors/grab.svg") 16 16; --cur-grabbing: url("/assets/cursors/grabbing.svg") 16 16;
}
html.has-cursor[data-theme="dark"], html.has-cursor.ink, html.has-cursor .ink {
  --cur-arrow: url("/assets/cursors/arrow-ink.svg") 4 3; --cur-link: url("/assets/cursors/link-ink.svg") 14 2;
  --cur-grab: url("/assets/cursors/grab-ink.svg") 16 16; --cur-grabbing: url("/assets/cursors/grabbing-ink.svg") 16 16;
}
html.has-cursor body, html.has-cursor .ink { cursor: var(--cur-arrow), auto; }
html.has-cursor :is(a[href], button:not([disabled]), summary, label[for], [role="button"], [role="tab"], select, input[type="checkbox"], input[type="radio"]) { cursor: var(--cur-link), pointer; }
html.has-cursor :is(input:not([type="checkbox"], [type="radio"], [type="range"], [type="submit"]), textarea) { cursor: text; }
html.has-cursor [data-cursor="drag"] { cursor: var(--cur-grab), grab; }
html.has-cursor [data-cursor="drag"]:active, html.has-cursor .is-dragging, html.has-cursor .is-dragging * { cursor: var(--cur-grabbing), grabbing; }


/* --------------------------------------------------------------------------
   08 · SHELL — nav, menu, footer, consent
   -------------------------------------------------------------------------- */
.defs { position: absolute; width: 0; height: 0; overflow: hidden; }

.nav {
  position: sticky; top: 0; z-index: var(--z-nav);
  background: var(--color-bg);
  border-bottom: var(--line-hair) solid transparent;
  transition: border-color var(--duration-fast) var(--ease-standard);
}
.nav.is-scrolled { border-bottom-color: var(--color-border); }
.nav__inner { display: flex; align-items: center; gap: var(--space-5); block-size: var(--nav-h); }
.nav__links { display: none; gap: var(--space-6); margin-left: auto; }
.nav__link {
  display: block; padding-block: var(--space-2);
  font-size: var(--text-small); font-weight: 500; letter-spacing: -.005em; color: var(--color-muted);
  transition: color var(--duration-fast) var(--ease-standard);
}
.nav__link:hover { color: var(--color-text); }
/* Current page: a static 1px underline. */
.nav__link[aria-current="page"] { color: var(--color-text); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .5em; }
.nav__tools { display: flex; align-items: center; gap: var(--space-3); margin-left: auto; }
.nav__cta { display: none; }
/* Menu and Close share one size and spot, so swapping them never shifts. */
.menu-btn { min-inline-size: 5.25rem; justify-content: center; }

/* Menu: full-screen dialog in the page's colours (Ink by default) with large numbered links. */
.menu {
  position: fixed; inset: 0; z-index: var(--z-menu);
  inline-size: 100%; block-size: 100%; max-inline-size: none; max-block-size: none;
  margin: 0; padding: 0; border: 0;
  overflow-y: auto; background: var(--color-bg); color: var(--color-text);
}
.menu[open] { display: flex; flex-direction: column; }
.menu::backdrop { background: var(--color-bg); }
.menu__head { display: flex; justify-content: space-between; align-items: center; block-size: var(--nav-h); flex: none; }
.menu__list { margin-block: auto; padding-block: var(--space-7); display: grid; gap: var(--space-2); }
.menu__list a {
  display: flex; align-items: baseline; gap: var(--space-4);
  font-family: var(--font-display); font-weight: 600; font-size: clamp(2.5rem, 11vw, 4.5rem);
  line-height: 1.05; letter-spacing: var(--track-heading);
}
.menu__list a span {
  min-inline-size: 2ch;
  font-family: var(--font-display); font-weight: 300; font-size: var(--text-small); letter-spacing: 0;
  color: var(--color-muted); font-variant-numeric: tabular-nums;
}
.menu__list a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .12em; }
.menu__foot {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding-block: var(--space-5) calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
  border-top: var(--line-hair) solid var(--color-border); font-size: var(--text-small);
}
.menu__tools { display: flex; flex-wrap: wrap; gap: var(--space-3); }
html:has(dialog[open]) { overflow: hidden; }

/* Footer */
.footer { position: relative; overflow: hidden; padding-top: var(--space-9); border-top: var(--line-hair) solid var(--color-border); }
.footer__sign { font-family: var(--font-display); font-weight: 600; font-size: var(--text-display); line-height: var(--leading-display); letter-spacing: var(--track-display); }
.footer__grid { margin-top: var(--space-8); row-gap: var(--space-6); font-size: var(--text-small); }
.footer__grid h2 { margin-bottom: var(--space-3); }
.footer__grid ul { display: grid; align-content: start; gap: var(--space-2); }
.footer__contact a { overflow-wrap: anywhere; }
.footer__tools { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-5); }
/* Giant wordmark cropped along the bottom edge. */
.footer__word {
  margin-top: var(--space-8);
  block-size: calc(var(--word-size) * .62); overflow: hidden;
  --word-size: calc((min(100vw, var(--page-max)) - 2 * var(--margin)) / 4.4);
}
.footer__word span {
  display: block;
  font-family: var(--font-display); font-weight: 600; font-size: var(--word-size);
  line-height: .8; letter-spacing: -.05em; white-space: nowrap;
  margin-left: -.06em; color: var(--color-text);
  user-select: none;
}

/* Analytics consent (only when GA4 is configured). */
.consent {
  position: fixed; left: var(--space-4); right: var(--space-4); bottom: var(--space-4); z-index: var(--z-menu);
  display: grid; gap: var(--space-4); max-inline-size: 30rem;
  padding: var(--space-5); border: var(--line-hair) solid var(--color-border-strong);
  font-size: var(--text-small);
}
.consent__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }


/* --------------------------------------------------------------------------
   09 · HOME
   -------------------------------------------------------------------------- */

/* 01 Hero */
.hero { padding-block: clamp(var(--space-6), 6vw, var(--space-9)) var(--space-6); }
.hero__title .line { display: block; white-space: nowrap; }
.hero__body { margin-top: clamp(var(--space-6), 4vw, var(--space-7)); row-gap: var(--space-8); align-items: end; }
.hero__lead { max-width: 34rem; }
.hero__sub { margin-top: var(--space-4); max-width: 34rem; color: var(--color-muted); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }

/* The Lift figure: the signature diagram. */
.lift { position: relative; color: var(--color-text); }
.lift__stage { position: relative; margin-bottom: 2.75rem; }
.lift__svg { inline-size: 100%; block-size: auto; overflow: visible; }
.lift__grab { fill: transparent; touch-action: none; }
.lift__tag {
  position: absolute; display: inline-flex; align-items: baseline; gap: .6em;
  font-size: var(--text-label); font-weight: 500; letter-spacing: var(--track-label); text-transform: uppercase;
  color: var(--color-muted); white-space: nowrap; line-height: 1.2; pointer-events: none;
}
.lift__tag b { font-family: var(--font-display); font-weight: 300; font-size: var(--text-small); letter-spacing: 0; color: var(--color-text); }
.lift__tag--a { left: 0; top: calc(100% + .9rem); }
.lift__tag--b { right: 0; top: calc(100% + .9rem); }
.lift__tag--c { left: calc(50% + 1.35rem); top: 16.42%; transform: translateY(-50%); color: var(--color-text); }
.motion [data-hero-arc]:not(.is-live) [data-span] { stroke-dasharray: 1 1; stroke-dashoffset: 1; }
.motion [data-hero-arc]:not(.is-live) :is([data-anchor], [data-rest], [data-lift-label]) { opacity: 0; }
.lift.is-dragging .lift__tag--c { color: var(--color-text); }

/* "Drag me": sits above the Grow node until the first drag. */
.lift__hint {
  position: absolute; left: 50%; top: 16.42%; transform: translate(-50%, calc(-100% - 1.1rem));
  padding: 2px var(--space-2); border: var(--line-hair) solid var(--color-border-strong); background: var(--color-bg);
  font-size: var(--text-label); font-weight: 500; letter-spacing: var(--track-label); text-transform: uppercase;
  white-space: nowrap; pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-standard);
}
.lift__hint.is-gone { opacity: 0; }
/* The headline's full stops dim while their copies travel into the ARC. */
.hero__title .stop::after { transition: opacity var(--duration-medium) var(--ease-standard); }
.hero__title.is-lifting .stop::after { opacity: .18; }
.hero__fly { position: fixed; left: 0; top: 0; z-index: 5; border-radius: var(--radius-node); background: var(--color-text); pointer-events: none; will-change: transform; }


/* --------------------------------------------------------------------------
   09b · LAB — section intro, client strip, Lab cards, Lab File dialog
   -------------------------------------------------------------------------- */

/* Section intro: label / title / body on the grid. */
.intro { row-gap: var(--space-5); margin-bottom: clamp(var(--space-7), 6vw, var(--space-9)); }
.intro__title { max-width: 16ch; }
.intro__body { max-width: 38rem; color: var(--color-muted); }
.intro__body p + p { margin-top: var(--space-3); }
.intro__body strong { color: var(--color-text); font-weight: 400; }
@media (min-width: 1024px) {
  .intro__label { grid-column: 1 / 4; padding-top: .9em; }
  .intro__title { grid-column: 4 / 11; }
  .intro__body  { grid-column: 4 / 10; }
}

/* Client strip: one proof strip, slow continuous scroll, pauses on hover. */
.client-strip {
  overflow: hidden; border-block: var(--line-hair) solid var(--color-border);
  padding-block: var(--space-5); margin-bottom: clamp(var(--space-7), 6vw, var(--space-9));
}
.client-strip__track { display: flex; inline-size: max-content; }
.client-strip__list { display: flex; flex: none; }
.client-strip__list li {
  display: flex; align-items: center; gap: clamp(var(--space-5), 3vw, var(--space-7));
  padding-right: clamp(var(--space-5), 3vw, var(--space-7));
  font-family: var(--font-display); font-weight: 300; font-size: clamp(2.25rem, 5.6vw, 5.25rem);
  line-height: 1.1; letter-spacing: -.035em; white-space: nowrap;
}
.client-strip__list li::after {
  content: ""; inline-size: var(--node-md); block-size: var(--node-md); border-radius: var(--radius-node);
  background: var(--color-node); flex: none;
}
.motion .client-strip__track { animation: strip 48s linear infinite; }
.client-strip:is(:hover, :focus-within) .client-strip__track { animation-play-state: paused; }
.client-strip__list a { color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-standard); }
.client-strip__list a:hover, .client-strip__list a:focus-visible { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .12em; }
@keyframes strip { to { transform: translateX(-50%); } }
/* Reduced motion: the strip stops and shows every name. */
:root:not(.motion) .client-strip__track { inline-size: auto; padding-inline: var(--margin); }
:root:not(.motion) .client-strip__list { flex-wrap: wrap; row-gap: var(--space-2); }
:root:not(.motion) .client-strip__list[aria-hidden] { display: none; }
:root:not(.motion) .client-strip__list li { font-size: clamp(1.75rem, 4vw, 3.5rem); }

/* Lab card */
.lab-grid--featured { padding-top: var(--space-7); }
.lab-grid { row-gap: clamp(var(--space-7), 6vw, var(--space-9)); align-items: start; }
.lab-card { position: relative; display: flex; flex-direction: column; min-width: 0; }
.lab-card__link { display: flex; flex-direction: column; flex: 1; color: inherit; }
.lab-card__frame { transition: border-color var(--duration-fast) var(--ease-standard); }
.lab-card__link:hover .lab-card__frame, .lab-card__link:focus-visible .lab-card__frame { border-color: var(--color-text); }
.lab-card__link:focus-visible { outline-offset: 6px; }
.lab-card__stamp { position: relative; z-index: 2; align-self: flex-end; margin: -.85rem var(--space-4) 0 0; transform: rotate(-2deg); }
.lab-card__meta { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: var(--space-4); row-gap: var(--space-1); padding-top: var(--space-3); }
.lab-card__index { font-family: var(--font-display); font-weight: 300; font-size: var(--text-small); color: var(--color-muted); font-variant-numeric: tabular-nums; padding-top: .3em; }
.lab-card__name { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.25rem, 1.2vw + .6rem, 1.625rem); letter-spacing: -.02em; line-height: 1.15; }
.lab-card__link:hover .lab-card__name { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .18em; }
.lab-card__line, .lab-card__sector { grid-column: 2; }
.lab-card__line { color: var(--color-muted); }
.lab-card__sector { font-size: var(--text-meta); color: var(--color-muted); letter-spacing: .02em; }
.lab-card .frame__video { opacity: 0; transition: opacity var(--duration-fast) var(--ease-standard); }
.lab-card .frame__video.is-playing { opacity: 1; }

/* The hand annotation on every live file: a phrase joined to the frame by a thin arc.
   Alternates sides; on phones it sits under the card as a plain line. */
.annotation { order: 2; margin-top: var(--space-3); font-size: var(--text-small); }
.annotation svg { display: none; }
@media (min-width: 768px) {
  .annotation { order: 0; margin: 0; position: absolute; right: 0; bottom: calc(100% - .25rem); display: flex; align-items: flex-end; justify-content: flex-end; gap: var(--space-1); white-space: nowrap; }
  .annotation--left { right: auto; left: 0; flex-direction: row-reverse; }
  .annotation a { padding-bottom: 1.6rem; }
  .annotation svg { display: block; inline-size: 3.75rem; block-size: 2.5rem; flex: none; overflow: visible; color: var(--color-text); }
  .annotation--left svg { transform: scaleX(-1); }
}

.lab-preview__foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-6); margin-top: clamp(var(--space-7), 6vw, var(--space-9)); }

@media (min-width: 768px) {
  .lab-grid--featured .lab-card--tall { grid-column: 2 / 7; }
}
@media (min-width: 1024px) {
  .lab-grid--featured .lab-card--large { grid-column: 1 / 9; }
  .lab-grid--featured .lab-card--tall  { grid-column: 9 / -1; align-self: stretch; }
  .lab-grid--featured .lab-card--wide  { grid-column: 4 / -1; }
  .lab-card--tall .lab-card__frame { flex: 1; display: flex; flex-direction: column; }
  .lab-card--tall .frame__media { flex: 1; aspect-ratio: auto; min-block-size: 0; }
}

/* Lab File dialog — always Ink. An arch rises from the card (clip-path, JS). */
.lab-file {
  position: fixed; inset: 0; z-index: var(--z-menu);
  inline-size: 100%; block-size: 100%; max-inline-size: none; max-block-size: none;
  margin: 0; padding: 0; border: 0; overflow-y: auto; overscroll-behavior: contain;
}
.lab-file::backdrop { background: transparent; }
.lab-file__panel { padding-bottom: var(--space-8); }
.lab-file__head {
  position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: var(--space-4);
  min-block-size: var(--nav-h); background: var(--color-bg); border-bottom: var(--line-hair) solid var(--color-border);
}
.lab-file__sector { margin-right: auto; }
.lab-file__title { margin-top: clamp(var(--space-6), 5vw, var(--space-8)); }
.lab-file__line { margin-top: var(--space-4); color: var(--color-muted); max-width: 40rem; }
.lab-file__body { margin-top: clamp(var(--space-7), 5vw, var(--space-8)); row-gap: var(--space-7); align-items: start; }
.lab-file__viewer { order: -1; }
.record { border-top: var(--line-hair) solid var(--color-border); }
.record__row { display: grid; gap: var(--space-2); padding-block: var(--space-5); border-bottom: var(--line-hair) solid var(--color-border); }
.record__row dd { max-width: var(--measure); }
.record__row dd ol { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.record__row dd ol li + li::before { content: "→"; margin-right: var(--space-2); color: var(--color-muted); }

/* Formula drawn as a small ARC: two anchors, one span, the solution rises. */
.formula { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-2) var(--space-5); max-width: 34rem; }
.formula__solution { grid-column: 1 / -1; text-align: center; font-weight: 500; text-wrap: balance; }
.formula svg { grid-column: 1 / -1; inline-size: 100%; block-size: auto; overflow: visible; color: var(--color-text); }
.formula__a { color: var(--color-muted); }
.formula__b { color: var(--color-muted); text-align: right; }

/* Viewer: Desktop / Mobile tabs, drag-to-scroll inside the frame. */
.viewer__head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-4); }
.viewer__open { display: block; color: inherit; transition: border-color var(--duration-fast) var(--ease-standard); }
.viewer__open:hover, .viewer__open:focus-visible { border-color: var(--color-text); }
.frame__chrome a.frame__url { color: inherit; text-decoration: none; }
.frame__chrome a.frame__url:hover { text-decoration: underline; }
.viewer__scroll { max-block-size: min(62vh, 40rem); overflow-y: auto; overscroll-behavior: contain; background: var(--color-surface); }
.viewer__scroll img, .viewer__scroll video { inline-size: 100%; block-size: auto; }
.viewer__plate { position: relative; aspect-ratio: 16 / 10; }

.lab-file__foot { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3) var(--space-5); margin-top: var(--space-8); padding-top: var(--space-5); border-top: var(--line-hair) solid var(--color-border); }
.lab-file__pager { display: flex; gap: var(--space-3); margin-left: auto; }
.lab-file__pager .btn { max-inline-size: 100%; }

@media (min-width: 1024px) {
  .lab-file__record { grid-column: 1 / 6; }
  .lab-file__viewer { grid-column: 7 / -1; order: 0; position: sticky; top: calc(var(--nav-h) + var(--space-5)); }
}
@media (max-width: 479px) {
  .lab-file__pager { margin-left: 0; inline-size: 100%; }
  .lab-file__pager .btn { flex: 1; justify-content: center; padding-inline: var(--space-3); }
}


/* --------------------------------------------------------------------------
   09c · /LAB — page head, filter, all-files grid, closing
   -------------------------------------------------------------------------- */
.page-head { padding-block: clamp(var(--space-7), 7vw, var(--space-10)) 0; }
.lab-page { padding-bottom: var(--section-space); }
.filter { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); margin-bottom: clamp(var(--space-7), 5vw, var(--space-8)); }
.filter__btn {
  min-block-size: 2.75rem; padding-block: var(--space-2);
  font-size: var(--text-small); font-weight: 500; color: var(--color-muted);
  transition: color var(--duration-fast) var(--ease-standard);
}
.filter__btn:hover { color: var(--color-text); }
.filter__btn[aria-pressed="true"] { color: var(--color-text); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .55em; }
.lab-close__inner { display: grid; justify-items: start; gap: var(--space-6); }
.lab-close { border-top: var(--line-hair) solid var(--color-border); }

@media (min-width: 768px) {
  .lab-grid--all .lab-card--a { grid-column: 1 / 5; }
  .lab-grid--all .lab-card--b { grid-column: 5 / -1; margin-top: var(--space-9); }
  .lab-grid--all .lab-card--tall { grid-column: 3 / 7; }
  .lab-grid--all.is-filtered .lab-card { grid-column: span 4; margin-top: 0; }
  .lab-grid--all.is-filtered .lab-card .frame__media { aspect-ratio: 16 / 10; flex: none; }
}
@media (min-width: 1024px) {
  .lab-grid--all .lab-card--large { grid-column: 1 / 9; }
  .lab-grid--all .lab-card--tall  { grid-column: 9 / -1; align-self: stretch; }
  .lab-grid--all .lab-card--a { grid-column: 1 / 7; }
  .lab-grid--all .lab-card--b { grid-column: 8 / -1; margin-top: var(--space-10); }
  .lab-grid--all.is-filtered .lab-card { grid-column: span 6; }
}


/* --------------------------------------------------------------------------
   09d · ELEMENTS — symbol tiles, accordion rows, mini-demos, combinations
   -------------------------------------------------------------------------- */
.lab-preview__foot--end { justify-content: flex-end; }

/* Symbol tile, like a periodic-table element. */
.el-sym {
  display: inline-grid; place-items: center; flex: none;
  inline-size: 3rem; block-size: 3rem; border: var(--line-hair) solid var(--color-border-strong);
  font-family: var(--font-display); font-weight: 500; font-size: 1.25rem; letter-spacing: -.02em; line-height: 1;
  background: var(--color-bg);
  transition: transform var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
}
.el-row__num { font-family: var(--font-display); font-weight: 300; font-size: var(--text-small); color: var(--color-muted); font-variant-numeric: tabular-nums; }

/* Home: compact rows → /elements/#slug */
.el-minis { border-top: var(--line-hair) solid var(--color-border); }
.el-mini {
  display: grid; grid-template-columns: 2rem auto minmax(0, 1fr); align-items: center; column-gap: var(--space-4); row-gap: var(--space-2);
  padding-block: var(--space-4); border-bottom: var(--line-hair) solid var(--color-border);
}
.el-mini__name { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.25rem, 1.6vw + .5rem, 2rem); letter-spacing: var(--track-snug); line-height: 1.1; }
.el-mini__line { grid-column: 3; color: var(--color-muted); font-size: var(--text-small); }
.el-mini:hover .el-sym, .el-mini:focus-visible .el-sym { transform: scale(1.12); border-color: var(--color-text); }
.el-mini:hover .el-mini__name { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .15em; }
@media (min-width: 1024px) {
  .el-mini { grid-template-columns: 3rem 3.5rem minmax(0, 5fr) minmax(0, 6fr); padding-block: var(--space-5); }
  .el-mini__line { grid-column: 4; font-size: var(--text-body); }
}

/* /elements: accordion rows */
.el-rows { position: relative; border-top: var(--line-hair) solid var(--color-border); }
.el-rows__note { position: absolute; right: 0; top: calc(-1 * var(--space-8)); --tilt: 2.5deg; }
@media (max-width: 1023px) { .el-rows__note { position: relative; top: auto; float: right; margin: calc(-1 * var(--space-5)) 0 var(--space-5); } }
.el-row { position: relative; border-bottom: var(--line-hair) solid var(--color-border); }
.el-row__head { font: inherit; }
.el-row__btn {
  position: relative; z-index: 1; inline-size: 100%; text-align: left;
  display: grid; grid-template-columns: 2rem auto minmax(0, 1fr) 2.5rem; align-items: center; column-gap: var(--space-4); row-gap: var(--space-2);
  padding-block: var(--space-5);
}
.el-row__btn:focus-visible { outline-offset: -2px; }
.el-row__name { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.5rem, 3.2vw, 3rem); letter-spacing: var(--track-heading); line-height: 1.04; }
.el-row__line { grid-column: 3 / -1; color: var(--color-muted); font-size: var(--text-small); max-width: 36rem; }
.el-row__plus { grid-column: 4; grid-row: 1; justify-self: end; position: relative; inline-size: 1.25rem; block-size: 1.25rem; }
.el-row__plus::before, .el-row__plus::after { content: ""; position: absolute; left: 0; right: 0; top: 50%; block-size: var(--line-rule); margin-top: -.75px; background: currentColor; transition: transform var(--duration-medium) var(--ease-standard); }
.el-row__plus::after { transform: rotate(90deg); }
.el-row__btn[aria-expanded="true"] .el-row__plus::before { transform: rotate(45deg); }
.el-row__btn[aria-expanded="true"] .el-row__plus::after { transform: rotate(135deg); }
.el-row__btn:hover .el-sym, .el-row__btn[aria-expanded="true"] .el-sym { border-color: var(--color-text); }
/* A large faint symbol shows behind the row on hover. */
.el-row__ghost {
  position: absolute; right: 8%; top: -.12em; z-index: 0; pointer-events: none;
  font-family: var(--font-display); font-weight: 600; font-size: clamp(6rem, 13vw, 12rem); line-height: 1; letter-spacing: -.05em;
  color: var(--color-surface); opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-standard);
}
.el-row:has(.el-row__btn:hover) .el-row__ghost { opacity: 1; }
.el-row__panel { position: relative; z-index: 1; overflow: hidden; }
.el-panel { display: grid; gap: var(--space-7); padding-bottom: var(--space-8); }
.el-panel__facts { display: grid; gap: 0; border-top: var(--line-hair) solid var(--color-border); }
.el-panel__facts > div { display: grid; gap: var(--space-2); padding-block: var(--space-4); border-bottom: var(--line-hair) solid var(--color-border); }
.el-panel__facts dd { max-width: var(--measure); }
.el-panel__list { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.el-panel__list li { padding: 2px var(--space-2); border: var(--line-hair) solid var(--color-border-strong); font-size: var(--text-small); }
.el-panel__links { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); }
.el-panel__steps { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.el-panel__steps li + li::before { content: "→"; margin-right: var(--space-2); color: var(--color-muted); }
@media (min-width: 1024px) {
  .el-row__btn { grid-template-columns: 3rem 3.5rem minmax(0, 5fr) minmax(0, 6fr) 2.5rem; padding-block: var(--space-6); }
  .el-row__line { grid-column: 4; font-size: var(--text-body); }
  .el-row__plus { grid-column: 5; }
  .el-panel { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); column-gap: var(--space-8); padding-left: calc(3rem + 3.5rem + 2 * var(--space-4)); }
}

/* Mini-demos: each plays once when its row opens; complete when reduced. */
.demo { position: relative; aspect-ratio: 4 / 3; max-inline-size: 26rem; border: var(--line-hair) solid var(--color-border-strong); background: var(--color-surface); overflow: hidden; }
.demo__chrome { display: flex; gap: 5px; padding: var(--space-2) var(--space-3); border-bottom: var(--line-hair) solid var(--color-border-strong); background: var(--color-bg); }
.demo__chrome i { inline-size: var(--node-xs); block-size: var(--node-xs); border-radius: var(--radius-node); background: var(--color-faint); }
.demo__stage { position: absolute; inset: 2rem 0 0; padding: var(--space-5); display: grid; align-content: start; gap: var(--space-3); }
.demo__bar { display: block; block-size: .5rem; background: var(--color-border-strong); }
.demo__bar--strong { background: var(--color-text); block-size: .9rem; }
.demo__btn { justify-self: start; padding: var(--space-2) var(--space-4); background: var(--color-action-bg); color: var(--color-action-text); font-size: var(--text-meta); font-weight: 500; }
.demo [data-step] { transition: opacity var(--duration-medium) var(--ease-standard), transform var(--duration-medium) var(--ease-lift); transition-delay: calc(var(--d, 0) * 1ms); }
.demo:not(.is-done) [data-step] { opacity: 0; transform: translateY(8px); }
/* Websites: nav, headline, button assemble */
.demo__nav { display: flex; justify-content: space-between; align-items: center; }
.demo__nav span:last-child { display: flex; gap: var(--space-2); }
.demo__nav span:last-child i { inline-size: 1.5rem; block-size: .35rem; background: var(--color-border-strong); }
/* E-commerce: add to cart ticks the counter */
.demo--cart .demo__stage { grid-template-columns: 1fr 1fr; align-items: start; }
.demo--cart .demo__img { aspect-ratio: 1; background: var(--color-border); }
.demo__cart { position: absolute; top: var(--space-3); right: var(--space-4); display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-meta); font-weight: 500; }
.demo__count { display: inline-grid; place-items: center; min-inline-size: 1.5rem; block-size: 1.5rem; border-radius: var(--radius-node); background: var(--color-text); color: var(--color-bg); font-variant-numeric: tabular-nums; }
.demo--cart .demo__btn { border: 0; cursor: pointer; }
/* Lead & Booking: a message bubble pops in */
.demo--bubble .demo__stage { align-content: end; }
.demo__bubble { justify-self: end; max-inline-size: 80%; padding: var(--space-3) var(--space-4); background: var(--color-text); color: var(--color-bg); font-size: var(--text-small); border-radius: 2px; transform-origin: bottom right; }
.demo--bubble:not(.is-done) .demo__bubble { transform: scale(.6); }
/* Digital Presence: a local search; your business rises to the top, a pin drops */
.demo--search .demo__stage { gap: var(--space-3); padding: var(--space-4); }
.demo__query { display: flex; align-items: center; gap: var(--space-2); block-size: 1.9rem; padding-inline: var(--space-3); border: var(--line-hair) solid var(--color-border-strong); border-radius: 1rem; background: var(--color-bg); font-size: var(--text-meta); white-space: nowrap; overflow: hidden; }
.demo__glass { inline-size: .6rem; block-size: .6rem; border: 1.5px solid var(--color-muted); border-radius: 50%; flex: none; }
.demo__caret { inline-size: 1px; block-size: .9rem; background: var(--color-text); margin-left: -2px; }
.demo.is-found .demo__caret { opacity: 0; }
.demo__serp { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: var(--space-3); }
.demo__results { padding: 0; margin: 0; list-style: none; display: grid; gap: var(--space-2); align-content: start; }
.demo__res { display: grid; gap: 5px; padding: var(--space-2); border: var(--line-hair) solid var(--color-border); background: var(--color-bg); }
.demo__res .demo__bar { block-size: .35rem; }
.demo__res .demo__bar--strong { block-size: .5rem; }
.demo__res-name { font-size: var(--text-meta); font-weight: 600; line-height: 1.1; }
.demo__stars { font-size: .6rem; letter-spacing: .1em; line-height: 1; }
.demo__chips { display: flex; flex-wrap: wrap; gap: 3px; }
.demo__chips span { padding: 1px 5px; border: var(--line-hair) solid var(--color-border-strong); font-size: .55rem; line-height: 1.4; }
.demo__res--you { transition: border-color var(--duration-medium) var(--ease-standard); }
.demo.is-found .demo__res--you { border-color: var(--color-text); }
.demo__map { position: relative; border: var(--line-hair) solid var(--color-border); background-color: var(--color-bg);
  background-image: linear-gradient(var(--color-border) 1px, transparent 1px), linear-gradient(90deg, var(--color-border) 1px, transparent 1px); background-size: 1.25rem 1.25rem; }
.demo__pin { position: absolute; left: 50%; top: 32%; inline-size: 1.1rem; block-size: 1.65rem; margin-left: -.55rem; color: var(--color-text);
  transition: transform var(--duration-medium) var(--ease-lift), opacity var(--duration-fast) var(--ease-standard); }
.demo--search:not(.is-found) .demo__pin { transform: translateY(-3rem); opacity: 0; }
/* Custom Systems: an enquiry board that moves itself along */
.demo--board .demo__stage { gap: var(--space-3); padding: var(--space-4); bottom: 0; grid-template-rows: minmax(0, 1fr) auto; }
.demo__cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-2); min-block-size: 0; }
.demo__lane { display: grid; grid-template-rows: auto 1fr; gap: var(--space-2); padding: var(--space-2); background: var(--color-bg); border: var(--line-hair) solid var(--color-border); min-block-size: 0; }
.demo__lane-head { display: flex; justify-content: space-between; align-items: center; font-size: .6rem; font-weight: 500; letter-spacing: .04em; text-transform: uppercase; color: var(--color-muted); }
.demo__lane-head b { display: inline-grid; place-items: center; min-inline-size: 1rem; block-size: 1rem; border-radius: var(--radius-node); background: var(--color-text); color: var(--color-bg); font-weight: 500; font-variant-numeric: tabular-nums; }
.demo__lane-body { display: grid; gap: 5px; align-content: start; }
.demo__card { display: grid; gap: 4px; padding: 6px; border: var(--line-hair) solid var(--color-border-strong); background: var(--color-surface); }
.demo__card .demo__bar { block-size: .3rem; }
.demo__card .demo__bar--strong { block-size: .45rem; }
.demo__toast { display: flex; align-items: center; gap: var(--space-2); justify-self: start; padding: 4px var(--space-3); background: var(--color-text); color: var(--color-bg); font-size: var(--text-meta);
  transition: opacity var(--duration-medium) var(--ease-standard), transform var(--duration-medium) var(--ease-lift); }
.demo__toast .node { background: var(--color-bg); }
.demo__toast:not(.is-on) { opacity: 0; transform: translateY(6px); }
/* Redesigns: before/after */
.demo--slider .demo__layer { position: absolute; inset: 2rem 0 0; padding: var(--space-5); display: grid; align-content: start; gap: var(--space-2); }
.demo__before { background: var(--color-surface); }
.demo__before .demo__bar { background: var(--color-faint); }
.demo__before .demo__bar:nth-child(odd) { inline-size: 70%; }
.demo__after { background: var(--color-bg); clip-path: inset(0 0 0 var(--split, 50%)); gap: var(--space-4); }
.demo__divider { position: absolute; top: 2rem; bottom: 0; left: var(--split, 50%); inline-size: var(--line-hair); background: var(--color-text); pointer-events: none; }
.demo__divider::after { content: ""; position: absolute; top: 50%; left: calc(var(--node-md) / -2); inline-size: var(--node-md); block-size: var(--node-md); border-radius: var(--radius-node); background: var(--color-text); }
.demo__range { position: absolute; inset: 2rem 0 0; inline-size: 100%; block-size: calc(100% - 2rem); margin: 0; opacity: 0; cursor: ew-resize; }
.demo__range:focus-visible + .demo__divider { outline: 2px solid var(--color-text); outline-offset: 3px; }
.demo__tags { position: absolute; left: var(--space-3); right: var(--space-3); bottom: var(--space-2); display: flex; justify-content: space-between; pointer-events: none; }

/* Combinations: small ARCs, two symbols as anchors, result on top. */
.combos { border-top: var(--line-hair) solid var(--color-border); }
.combos__list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 9.5rem), 1fr)); gap: var(--gutter); margin-top: var(--space-7); }
.combo { display: grid; justify-items: center; gap: var(--space-1); padding: var(--space-5) var(--space-4); border: var(--line-hair) solid var(--color-border); transition: border-color var(--duration-fast) var(--ease-standard); }
.combo:hover, .combo:focus-visible { border-color: var(--color-text); }
.combo__result { font-family: var(--font-display); font-weight: 600; font-size: 1.125rem; letter-spacing: -.01em; text-align: center; }
.combo__arc { inline-size: 7.5rem; block-size: auto; overflow: visible; color: var(--color-text); }
.combo__pair { display: flex; justify-content: space-between; inline-size: 8.5rem; margin-top: -.5rem; }
.combo__pair .el-sym { inline-size: 2.25rem; block-size: 2.25rem; font-size: .9375rem; }
.el-close { border-top: var(--line-hair) solid var(--color-border); }
.el-page { padding-bottom: var(--section-space); }


/* --------------------------------------------------------------------------
   09e · APPROACH, PROCESS, CONTACT
   -------------------------------------------------------------------------- */
/* 04 Approach */
.approach { border-top: var(--line-hair) solid var(--color-border); }
.approach__top { row-gap: var(--space-8); align-items: center; }
.approach__lines { display: grid; gap: var(--space-4); max-width: 36rem; }
.approach__lines .label { margin-bottom: var(--space-2); }
.approach__list { color: var(--color-muted); }
.approach__sub { margin-top: var(--space-6); font-weight: 600; }
/* Approach: a website plan; each callout names what that part of the page carries. */
.plan__svg { inline-size: 100%; block-size: auto; overflow: visible; color: var(--color-text); }
.plan__line, .plan__leader { fill: none; stroke: var(--color-text); stroke-width: 1; }   /* no non-scaling-stroke: it breaks the dash draw-in */
.plan__guide { fill: none; stroke: var(--color-border-strong); stroke-width: 1; stroke-dasharray: 3 4; vector-effect: non-scaling-stroke; }
.plan__dot { fill: var(--color-faint); }
.plan__strong { fill: var(--color-text); }
.plan__soft { fill: var(--color-border-strong); }
.plan__fill { fill: var(--color-surface); stroke: var(--color-border-strong); stroke-width: 1; vector-effect: non-scaling-stroke; }
.plan__box { fill: none; stroke: var(--color-border-strong); stroke-width: 1; vector-effect: non-scaling-stroke; }
.plan__node { fill: var(--color-node); }
.plan__call text { font-family: var(--font-body); font-size: 11px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; fill: var(--color-text); }
.plan__num { fill: var(--color-muted); font-variant-numeric: tabular-nums; }
/* Draws once in view: the frame, then the page parts, then the callouts in order. */
.plan__line { stroke-dasharray: 1 1; transition: stroke-dashoffset var(--duration-draw) var(--ease-span); }
.plan__blocks { transition: opacity var(--duration-slow) var(--ease-standard) 300ms; }
.plan__leader { stroke-dasharray: 1 1; transition: stroke-dashoffset var(--duration-medium) var(--ease-span) calc(800ms + var(--i) * 130ms); }
.plan__call :is(text, .plan__node) { transition: opacity var(--duration-medium) var(--ease-standard) calc(800ms + var(--i) * 130ms); }
.motion .plan:not(.is-live) :is(.plan__line, .plan__leader) { stroke-dashoffset: 1; }
.motion .plan:not(.is-live) :is(.plan__blocks, .plan__call text, .plan__node) { opacity: 0; }
.approach__studio { margin-top: var(--section-space); row-gap: var(--space-7); }
.approach__studio-intro { display: grid; gap: var(--space-3); max-width: 36rem; }
.approach__studio-intro strong { font-weight: 500; }
.types { display: grid; gap: var(--space-1); }
.types :is(a, span) {
  font-family: var(--font-display); font-weight: 600; font-size: clamp(2.25rem, 7.4vw, 7rem);
  line-height: 1; letter-spacing: var(--track-display);
}
.types a { display: inline-block; transition: color var(--duration-fast) var(--ease-standard); }
.types a:hover, .types a:focus-visible { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .1em; }
.types li:last-child a { max-width: 14ch; }
.types .types__refs { font: 500 var(--text-label) / 1.3 var(--font-body); letter-spacing: var(--track-label); text-transform: uppercase; display: inline-flex; gap: var(--space-4); margin-left: var(--space-4); vertical-align: .9em; }
.types .types__refs a { font: inherit; letter-spacing: inherit; }
.intro__title .line { display: block; }
.approach__studio-outro { max-width: 40rem; color: var(--color-muted); }
@media (min-width: 1024px) {
  .approach__lines { grid-column: 1 / 6; }
  .approach__fig { grid-column: 7 / -1; }
  .approach__studio-intro { grid-column: 1 / 6; }
  .types { grid-column: 1 / -1; }
  .approach__studio-outro { grid-column: 7 / -1; }
}

/* 05 Process: five steps on one thin line, a node on each step. */
.process-sec { border-top: var(--line-hair) solid var(--color-border); }
.process { position: relative; }
.process__note { position: absolute; right: 0; top: calc(-1 * var(--space-9)); --tilt: -3deg; }
.process__steps { position: relative; display: grid; gap: var(--space-7); padding-left: var(--space-6); }
.process__line { position: absolute; left: calc(var(--node-sm) / 2); top: .5rem; bottom: .5rem; inline-size: var(--line-hair); background: var(--color-text); transform-origin: top; }
.process__node { position: absolute; left: calc(-1 * var(--space-6)); top: .35rem; inline-size: var(--node-sm); block-size: var(--node-sm); border-radius: var(--radius-node); background: var(--color-node); }
.process__step { position: relative; display: grid; gap: var(--space-2); align-content: start; }
.process__num { font-family: var(--font-display); font-weight: 300; font-size: var(--text-small); color: var(--color-muted); font-variant-numeric: tabular-nums; }
.process__step h3 { font-family: var(--font-display); font-weight: 600; font-size: var(--text-h3); letter-spacing: var(--track-snug); line-height: 1.1; }
.process__step p { color: var(--color-muted); font-size: var(--text-small); max-width: 30rem; }
.motion .process:not(.is-live) .process__line { transform: scaleY(0); }
.motion .process:not(.is-live) .process__node { opacity: 0; }
.process__line { transition: transform var(--duration-slow) var(--ease-span); }
.process__node { transition: opacity var(--duration-fast) var(--ease-standard); transition-delay: calc(var(--i) * 140ms); }
@media (max-width: 1023px) { .process__note { position: relative; top: auto; display: inline-block; margin-bottom: var(--space-7); } }
@media (min-width: 1024px) {
  .process__steps { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--gutter); padding-left: 0; padding-top: var(--space-7); }
  .process__line { left: 0; right: 0; top: calc(var(--node-sm) / 2); bottom: auto; inline-size: auto; block-size: var(--line-hair); transform-origin: left; }
  .motion .process:not(.is-live) .process__line { transform: scaleX(0); }
  .process__node { left: 0; top: calc(-1 * var(--space-7)); }
  .process__steps { margin-top: 0; }
}

/* 06 Contact (Ink) */
.contact__grid { row-gap: var(--space-9); }
.contact__head { display: grid; gap: var(--space-5); align-content: start; }
.contact__title { max-width: 12ch; }
.contact__lines li { padding-block: var(--space-3); border-top: var(--line-hair) solid var(--color-border); color: var(--color-muted); font-size: var(--text-lead); letter-spacing: -.01em; }
.contact__lines li:last-child { border-bottom: var(--line-hair) solid var(--color-border); }
.direct { display: grid; margin-top: var(--space-5); }
.direct__item {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: var(--space-1) var(--space-4); text-align: left;
  padding-block: var(--space-4); border-top: var(--line-hair) solid var(--color-border);
}
.direct a.direct__item { color: inherit; text-decoration: none; }
.direct__item:hover .direct__value, .direct__item:focus-visible .direct__value { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .15em; }
.direct__item:last-child { border-bottom: var(--line-hair) solid var(--color-border); }
.direct__item .label { grid-column: 1 / -1; }
.direct__value { font-family: var(--font-display); font-weight: 500; font-size: clamp(1.375rem, 2.5vw, 2.5rem); letter-spacing: -.025em; line-height: 1.1; overflow-wrap: anywhere; }
.direct__status { display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--text-meta); font-weight: 500; color: var(--color-muted); }
.direct__status .node { --node: var(--node-xs); background: var(--color-faint); }
.direct__item:hover .direct__status, .direct__item.is-done .direct__status { color: var(--color-text); }
.direct__item.is-done .direct__status .node { background: var(--color-text); }
.contact__wa { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-5); margin-top: var(--space-3); }
@media (min-width: 1024px) {
  .contact__head { grid-column: 1 / 6; }
  .contact__form-col { grid-column: 7 / -1; }
}

/* Form */
.form { display: grid; gap: var(--space-5); }
.form__row { display: grid; gap: var(--space-5); }
@media (min-width: 640px) { .form__row { grid-template-columns: 1fr 1fr; } }
.field { display: grid; gap: var(--space-2); min-width: 0; margin: 0; padding: 0; border: 0; }
.field label, .field legend { font-size: var(--text-small); font-weight: 500; padding: 0; }
.field input, .field textarea {
  inline-size: 100%; min-block-size: 3rem; padding: var(--space-3);
  background: var(--color-surface); color: var(--color-text);
  border: var(--line-hair) solid var(--color-border-strong); border-radius: var(--radius-sm);
  transition: border-color var(--duration-fast) var(--ease-standard);
}
.field textarea { resize: vertical; min-block-size: 8rem; }
.field input:hover, .field textarea:hover { border-color: var(--color-muted); }
.field input:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--color-text); outline-offset: 1px; border-color: var(--color-text); }
.field [aria-invalid="true"] { border-color: var(--color-text); border-width: 2px; }
.field__err { font-size: var(--text-small); color: var(--color-text); }
.field__err::before { content: "— "; }
.form__hp { position: absolute; left: -9999px; inline-size: 1px; block-size: 1px; overflow: hidden; }
.form__foot { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4); margin-top: var(--space-3); }
.form__status { font-size: var(--text-small); color: var(--color-muted); }
.form__done { padding-block: var(--space-8); border-top: var(--line-hair) solid var(--color-border); }
.form__done:focus { outline: none; }

/* Chips: two selected → a span joins them and the result word appears above. */
.chips legend { margin-bottom: var(--space-2); }
.chips__result { min-block-size: 1.6em; font-family: var(--font-display); font-weight: 600; font-size: var(--text-h3); letter-spacing: var(--track-snug); text-align: center; }
.chips__set { position: relative; display: flex; flex-wrap: wrap; gap: var(--space-5) var(--space-3); padding-top: var(--space-6); }
.chips__link { position: absolute; z-index: 0; inset: 0; inline-size: 100%; block-size: 100%; overflow: visible; pointer-events: none; color: var(--color-text); }
.chip { position: relative; z-index: 1; display: inline-flex; }
.chip input { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; margin: 0; opacity: 0; }
.chip span {
  display: inline-flex; align-items: center; gap: var(--space-2); min-block-size: 2.75rem; padding: 0 var(--space-4);
  border: var(--line-hair) solid var(--color-border-strong); border-radius: var(--radius-sm); font-size: var(--text-small); font-weight: 500;
  background: var(--color-bg);
  transition: background var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
}
.chip span::before { content: ""; inline-size: var(--node-xs); block-size: var(--node-xs); border-radius: var(--radius-node); background: var(--color-faint); }
.chip:hover span { border-color: var(--color-text); }
.chip input:checked + span { background: var(--color-action-bg); color: var(--color-action-text); border-color: var(--color-text); }
.chip input:checked + span::before { background: currentColor; }
.chip input:focus-visible + span { outline: 2px solid var(--color-text); outline-offset: 3px; }


/* 404 */
.nf { padding-bottom: var(--section-space); }
.nf__inner { display: grid; justify-items: start; gap: var(--space-7); }
.nf__fig { inline-size: min(100%, 22rem); block-size: auto; }
.nf [data-rest] { transform-box: view-box; }

/* Privacy */
.prose { max-width: 42rem; padding-bottom: var(--section-space); }
.prose h2 { margin-top: var(--space-7); font-family: var(--font-display); font-weight: 600; font-size: var(--text-h3); letter-spacing: var(--track-snug); }
.prose p, .prose ul { margin-top: var(--space-3); color: var(--color-muted); }
.prose ul { padding-left: 1.2em; }
.prose li + li { margin-top: var(--space-1); }
.prose a { color: var(--color-text); }


/* --------------------------------------------------------------------------
   10 · RESPONSIVE — 390 · 480 · 768 · 1024 · 1200 · 1440
   -------------------------------------------------------------------------- */
@media (max-width: 479px) {
  .nav__tools .toggle--theme { display: none; }
}
@media (min-width: 640px) {
  :root { --text-hero: clamp(3.5rem, calc((min(100vw, var(--page-max)) - 2 * var(--margin)) / 8.7), 10.5rem); }
  .hero__title .line { display: inline; }
}
@media (min-width: 768px) {
  :root { --cols: 8; }
  .footer__services { grid-column: 1 / 5; }
  .footer__contact  { grid-column: 5 / 9; }
  .footer__links    { grid-column: 1 / 5; }
  .footer__tools    { grid-column: 5 / 9; align-self: end; }
}
@media (min-width: 1024px) {
  :root { --cols: 12; --text-body: 1.0625rem; --nav-h: 4.5rem; }
  .nav__links { display: flex; }
  .nav__cta { display: inline-flex; }
  .menu-btn { display: none; }
  .nav__links + .nav__tools { margin-left: var(--space-6); }
  .hero__lead-col { grid-column: 1 / 6; }
  .hero__fig-col  { grid-column: 7 / -1; }
  .footer__services { grid-column: 1 / 4; }
  .footer__contact  { grid-column: 4 / 7; }
  .footer__links    { grid-column: 7 / 10; }
  .footer__tools    { grid-column: 10 / -1; align-self: start; flex-direction: column; align-items: flex-start; }
}
@media (min-width: 1440px) {
  :root { --margin: max(4rem, (100vw - 1440px) / 2 + 4rem); }
  .wrap { width: min(100% - 8rem, var(--page-max) - 8rem); }
}


/* --------------------------------------------------------------------------
   11 · REDUCED MOTION — the on-page "Reduce motion" switch.
   Nothing draws, the strip stops, pop-ups and rows simply appear.
   -------------------------------------------------------------------------- */
:root[data-motion="reduced"] {
  --duration-medium: 1ms; --duration-open: 1ms; --duration-slow: 1ms; --duration-draw: 1ms;
}