/* DS Tech — public site (Light Blueprint). Hand-written, no framework. RTL-first (logical properties).
 * Colours come from tokens.css only (linked before this file, with fonts.css, by the layout). */

:root {
  --wrap: 76rem;
  --gutter: clamp(1rem, 0.6rem + 2vw, 2.5rem);
  --rail: clamp(1.25rem, 0.5rem + 2.5vw, 3rem);
  --header-h: 4.5rem;
  /* Registration mark (⊕) used as a mask, so it takes any token colour. */
  --mark-reg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32' fill='none' stroke='black' stroke-width='1.25'%3E%3Ccircle cx='16' cy='16' r='6.5'/%3E%3Cpath d='M16 0v32M0 16h32'/%3E%3Ccircle cx='16' cy='16' r='1.6' fill='black' stroke='none'/%3E%3C/svg%3E");
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 1rem); }
body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font);
  font-size: var(--step-0);
  line-height: 1.75;
  font-feature-settings: "kern";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img, video, iframe, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--color-primary); text-underline-offset: 0.22em; text-decoration-thickness: 1px; }
a:hover { color: var(--color-primary-hover); }
h1, h2, h3, h4 { color: var(--color-heading); line-height: 1.18; margin: 0 0 0.6em; font-weight: 800; letter-spacing: -0.015em; text-wrap: balance; }
p { margin: 0 0 1em; text-wrap: pretty; }
ul, ol { margin: 0 0 1em; padding-inline-start: 1.25em; }
strong, b { color: var(--color-heading); }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--color-primary-light); color: var(--color-heading); }
[hidden] { display: none !important; }

.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link {
  position: absolute; inset-inline-start: 1rem; top: -4rem; z-index: 100;
  background: var(--color-primary); color: var(--color-on-primary); padding: 0.75rem 1.25rem; border-radius: var(--radius-sm); font-weight: 700;
}
.skip-link:focus { top: 1rem; color: var(--color-on-primary); }

.mono { font-family: var(--mono); font-size: 0.8em; letter-spacing: 0.02em; direction: ltr; unicode-bidi: isolate; }
.muted { color: var(--color-muted); }
.ltr { direction: ltr; unicode-bidi: isolate; }

/* ---------- Layout ---------- */
.wrap { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
.wrap--narrow { width: min(100% - 2 * var(--gutter), 46rem); margin-inline: auto; }
main { display: block; }
.section { padding-block: clamp(3.5rem, 2.5rem + 4vw, 6.5rem); }
.section + .section { border-top: 1px solid var(--color-border); }
.section--panel { background: var(--color-surface); }

/*
 * Signature: the drawing sheet. Hero and page heads sit on a fine engineering grid that fades
 * towards the content; a registration mark (⊕) pins the sheet corner.
 */
.hero, .page-head { position: relative; isolation: isolate; }
.hero::before, .page-head::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--blueprint-grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-grid-major) 1px, transparent 1px),
    linear-gradient(var(--blueprint-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-grid) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  background-position: center -1px;
  -webkit-mask-image: radial-gradient(120% 90% at 15% 30%, black 35%, transparent 85%);
  mask-image: radial-gradient(120% 90% at 15% 30%, black 35%, transparent 85%);
}
.hero > .wrap, .page-head > .wrap { position: relative; }
.hero > .wrap::after, .page-head > .wrap::after {
  content: ""; position: absolute; inset-block-start: -1.25rem; inset-inline-end: 0; width: 2rem; height: 2rem;
  background: var(--color-accent); -webkit-mask: var(--mark-reg) center / contain no-repeat; mask: var(--mark-reg) center / contain no-repeat;
  opacity: 0.7; pointer-events: none;
}

/* Construction line: a dashed rail down the start edge; each section is a node on it, labelled with its real route. */
.railed { position: relative; padding-inline-start: var(--rail); }
.railed::before {
  content: ""; position: absolute; inset-block: 0; inset-inline-start: calc(var(--rail) * 0.3); width: 1px;
  background: repeating-linear-gradient(to bottom, var(--blueprint-line) 0 6px, transparent 6px 11px);
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 3rem, black calc(100% - 3rem), transparent);
  mask-image: linear-gradient(to bottom, transparent, black 3rem, black calc(100% - 3rem), transparent);
}
.node { position: relative; display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.25rem; color: var(--color-muted); }
.node::before {
  content: ""; position: absolute; inset-inline-start: calc(var(--rail) * -0.7 - 6px); top: 50%; translate: 0 -50%;
  width: 13px; height: 13px; border-radius: 50%; background: var(--color-background);
  border: 1.5px solid var(--color-accent); box-shadow: inset 0 0 0 2.5px var(--color-background), inset 0 0 0 6px var(--color-primary);
}
.section--panel .node::before { background: var(--color-surface); box-shadow: inset 0 0 0 2.5px var(--color-surface), inset 0 0 0 6px var(--color-primary); }
/* Measurement line after the label: dashed, with an end tick. */
.node::after {
  content: ""; flex: 1; min-width: 2rem; max-width: 18rem; height: 9px;
  background:
    linear-gradient(var(--color-border-strong), var(--color-border-strong)) left center / 1px 9px no-repeat,
    repeating-linear-gradient(to left, var(--color-border-strong) 0 4px, transparent 4px 8px) center / 100% 1px no-repeat;
}
.node__route { font-family: var(--mono); font-size: var(--step--1); color: var(--color-primary); direction: ltr; text-decoration: none; font-weight: 500; }
a.node__route:hover { text-decoration: underline; color: var(--color-primary-hover); }
.node__label { font-size: var(--step--1); font-weight: 600; letter-spacing: 0.01em; }

.section-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 1rem 2rem; margin-bottom: clamp(1.75rem, 1rem + 2vw, 2.75rem); }
.section-head h2 { font-size: var(--step-3); margin: 0; max-width: 22ch; }
.section-head p { color: var(--color-muted); max-width: 52ch; margin: 0.5rem 0 0; }
.section-head__more { white-space: nowrap; }

.grid { display: grid; gap: clamp(1rem, 0.6rem + 1.2vw, 1.5rem); }
.grid--2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 26rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr)); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--color-glass);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__bar { display: flex; align-items: center; gap: 1.5rem; min-height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 0.7rem; color: var(--color-heading); text-decoration: none; margin-inline-end: auto; }
.brand:hover { color: var(--color-heading); }
.brand__mark { display: block; width: 2.5rem; height: 2.5rem; flex: none; object-fit: contain; }
.brand__logo { display: block; height: 2.5rem; width: auto; max-width: 14rem; object-fit: contain; }
.brand__name { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name strong { font-size: 1.02rem; font-weight: 800; color: var(--color-heading); }
.brand__name span { font-size: 0.74rem; font-weight: 600; letter-spacing: 0.04em; color: var(--color-primary); direction: ltr; text-align: end; }
.nav { display: flex; align-items: center; gap: 0.15rem; }
.nav a {
  display: inline-flex; align-items: center; min-height: 2.75rem; padding: 0 0.8rem; border-radius: var(--radius-sm);
  color: var(--color-text); text-decoration: none; font-weight: 500; font-size: 0.97rem; position: relative;
}
.nav a:hover { color: var(--color-heading); background: var(--color-surface-secondary); }
.nav a[aria-current="page"] { color: var(--color-primary-hover); font-weight: 600; }
.nav a[aria-current="page"]::after { content: ""; position: absolute; inset-inline: 0.8rem; bottom: 0.3rem; height: 2px; border-radius: 2px; background: var(--color-primary); }
.menu-toggle { display: none; }

@media (max-width: 62rem) {
  .nav, .site-header .btn--cta { display: none; }
  .menu-toggle {
    display: inline-flex; align-items: center; gap: 0.5rem; min-height: 2.75rem; padding: 0 0.9rem; color: var(--color-heading); font-weight: 600;
    background: var(--color-surface); border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm); cursor: pointer;
  }
  .menu-toggle:hover { border-color: var(--color-primary); }
}
.mobile-menu {
  position: fixed; inset: 0; z-index: 60; margin: 0; max-width: none; max-height: none; width: 100%; height: 100%;
  border: 0; padding: 0; background: var(--color-surface); color: var(--color-text);
}
.mobile-menu::backdrop { background: var(--color-backdrop); }
.mobile-menu__inner { display: flex; flex-direction: column; min-height: 100%; padding: 0.75rem var(--gutter) 2rem; }
.mobile-menu__top { display: flex; justify-content: space-between; align-items: center; min-height: var(--header-h); margin-bottom: 1rem; border-bottom: 1px solid var(--color-border); }
.mobile-menu nav a {
  display: flex; justify-content: space-between; align-items: center; min-height: 3.5rem;
  border-bottom: 1px solid var(--color-border); color: var(--color-heading); text-decoration: none; font-size: 1.2rem; font-weight: 600;
}
.mobile-menu nav a[aria-current="page"] { color: var(--color-primary-hover); }
.mobile-menu nav a .mono { color: var(--color-muted); font-weight: 400; }
.mobile-menu .btn { margin-top: 2rem; justify-content: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem; min-height: 2.9rem; padding: 0 1.3rem;
  border-radius: var(--radius-sm); border: 1px solid transparent; font-weight: 700; font-size: 0.98rem; line-height: 1.2;
  text-decoration: none; cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), box-shadow .2s var(--ease);
}
.btn--primary { background: var(--color-primary); color: var(--color-on-primary); box-shadow: var(--shadow-1); }
.btn--primary:hover { background: var(--color-primary-hover); color: var(--color-on-primary); box-shadow: var(--shadow-2); }
.btn--ghost { border-color: var(--color-border-strong); color: var(--color-heading); background: var(--color-surface); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary-hover); background: var(--color-surface); }
.btn--quiet { color: var(--color-primary); padding-inline: 0.25rem; min-height: 2.75rem; }
.btn--quiet:hover { color: var(--color-primary-hover); text-decoration: underline; }
.btn--sm { min-height: 2.5rem; padding: 0 0.95rem; font-size: 0.9rem; }
.btn:focus-visible { outline: 2px solid transparent; box-shadow: var(--focus-ring); }
.btn svg { width: 1.1em; height: 1.1em; flex: none; }
.arrow { display: inline-block; transition: transform .2s var(--ease); }
a:hover .arrow, button:hover .arrow { transform: translateX(-3px); }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(3rem, 2rem + 5vw, 7rem) clamp(3rem, 2rem + 4vw, 6rem); border-bottom: 1px solid var(--color-border); }
.hero__grid { display: grid; gap: clamp(2rem, 1rem + 4vw, 4.5rem); grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); align-items: center; }
@media (max-width: 56rem) { .hero__grid { grid-template-columns: 1fr; } }
.hero__eyebrow { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; margin-bottom: 1.5rem; color: var(--color-muted); }
.hero__title { font-size: var(--step-5); font-weight: 800; line-height: 1.04; letter-spacing: -0.03em; margin-bottom: 0.4em; }
.hero__title span { display: block; color: var(--color-text); font-weight: 400; font-size: 0.42em; letter-spacing: -0.005em; margin-top: 0.55em; line-height: 1.3; max-width: 30ch; }
.hero__lead { font-size: var(--step-1); color: var(--color-muted); max-width: 42ch; margin-bottom: 2rem; line-height: 1.65; }
.hero__lead strong { color: var(--color-heading); font-weight: 600; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* Role ledger, drawn as a drawing's title block: real roles, not stats. */
.ledger { position: relative; border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); background: var(--color-surface); box-shadow: var(--shadow-2); overflow: hidden; }
.ledger__portrait { aspect-ratio: 4 / 3; background: var(--color-surface-secondary); border-bottom: 1px solid var(--color-border); }
.ledger__portrait img { width: 100%; height: 100%; object-fit: cover; }
.ledger__portrait--drawing {
  background-color: var(--color-surface);
  background-image: linear-gradient(var(--blueprint-grid) 1px, transparent 1px), linear-gradient(90deg, var(--blueprint-grid) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* DS mark as a construction drawing (hero). Lines draw in once, then the letters settle. */
.bp-mark { display: block; width: 100%; height: 100%; }
.bp-stop-a { stop-color: var(--color-primary-hover); }
.bp-stop-b { stop-color: var(--color-accent); }
.bp-dash, .bp-line, .bp-dim, .bp-node { fill: none; stroke: var(--color-accent); stroke-width: 2; }
.bp-dash { stroke-dasharray: 7 9; opacity: 0.55; }
.bp-line { opacity: 0.7; }
.bp-dim { stroke: var(--color-primary); opacity: 0.6; stroke-dasharray: 1; }
.bp-head { fill: none; stroke: var(--color-primary); stroke-width: 1.4; }
.bp-node { stroke: var(--color-primary); }
.bp-dot { fill: var(--color-primary); }
.bp-label { font-family: var(--mono); font-size: 22px; fill: var(--color-muted); }
@media (prefers-reduced-motion: no-preference) {
  .bp-line path, .bp-dim path { stroke-dasharray: 1; stroke-dashoffset: 1; animation: bp-draw 1.1s var(--ease) forwards; }
  .bp-line path:nth-child(2n) { animation-delay: .15s; }
  .bp-line path:nth-child(3n) { animation-delay: .3s; }
  .bp-dim path { animation-delay: .55s; animation-duration: 1.4s; }
  .bp-dash, .bp-node, .bp-dot, .bp-label { opacity: 0; animation: bp-fade .8s var(--ease) .5s forwards; }
  .bp-dash { --bp-o: 0.55; }
  .bp-letters { opacity: 0; transform: translateY(14px); animation: bp-rise .9s var(--ease) .75s forwards; }
  .bp-node circle:first-child { transform-box: fill-box; transform-origin: center; animation: bp-pulse 3.2s ease-in-out 2s infinite; }
  @keyframes bp-draw { to { stroke-dashoffset: 0; } }
  @keyframes bp-fade { to { opacity: var(--bp-o, 1); } }
  @keyframes bp-rise { to { opacity: 1; transform: none; } }
  @keyframes bp-pulse { 50% { transform: scale(1.35); opacity: 0.4; } }
}
html.a11y-contrast .bp-dash, html.a11y-contrast .bp-line { stroke: var(--color-border-strong); }
.ledger dl { margin: 0; }
.ledger__row { display: grid; grid-template-columns: 6.5rem 1fr; border-top: 1px solid var(--color-border); }
.ledger__row:first-child { border-top: 0; }
.ledger dt {
  font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-muted);
  direction: ltr; text-align: end; padding: 1rem 0.9rem; border-inline-end: 1px solid var(--color-border); background: var(--color-surface-secondary);
}
.ledger dd { margin: 0; font-weight: 700; color: var(--color-heading); padding: 0.85rem 1.1rem; }
.ledger dd small { display: block; font-weight: 400; color: var(--color-muted); font-size: 0.88rem; }

/* ---------- Cards ---------- */
.card {
  position: relative; display: flex; flex-direction: column; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-1);
  transition: border-color .2s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}
.card:hover { border-color: var(--color-border-strong); box-shadow: var(--shadow-2); }
.card:focus-within { border-color: var(--color-primary); }
.card:has(.card__title a:focus-visible) { box-shadow: var(--focus-ring); }
.card__media { aspect-ratio: 16 / 9; background: var(--color-surface-secondary); overflow: hidden; border-bottom: 1px solid var(--color-border); }
.card__media img { width: 100%; height: 100%; object-fit: cover; }
.card__body { display: flex; flex-direction: column; gap: 0.5rem; padding: 1.25rem 1.35rem 1.4rem; flex: 1; }
.card__kicker { display: flex; flex-wrap: wrap; gap: 0.4rem 0.9rem; color: var(--color-muted); font-size: var(--step--1); }
.card__title { font-size: var(--step-1); margin: 0; }
.card__title a { color: var(--color-heading); text-decoration: none; }
.card__title a::after { content: ""; position: absolute; inset: 0; }
.card__title a:hover { color: var(--color-primary-hover); }
.card__title a:focus-visible { outline: 2px solid transparent; }
.card__text { color: var(--color-muted); margin: 0; font-size: 0.97rem; }
.card__foot { margin-top: auto; padding-top: 0.75rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.card--project .card__media { aspect-ratio: 3 / 2; }
.card--plain .card__body { padding: 1.5rem; }
@media (prefers-reduced-motion: no-preference) { .card:hover { transform: translateY(-2px); } }

.tag {
  display: inline-flex; align-items: center; min-height: 1.75rem; padding: 0 0.6rem; border-radius: var(--radius-pill);
  background: var(--color-surface-secondary); border: 1px solid var(--color-border); color: var(--color-text);
  font-size: 0.8rem; font-weight: 500; text-decoration: none; position: relative; z-index: 1;
}
a.tag:hover { color: var(--color-primary-hover); border-color: var(--color-primary); }
.credit { display: inline-flex; gap: 0.35rem; align-items: center; font-size: 0.82rem; color: var(--color-muted); }
.credit b { color: var(--color-heading); font-weight: 600; }

/* Expertise list */
.expertise { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 21rem), 1fr)); border-top: 1px solid var(--color-border-strong); }
.expertise__item { padding: 1.5rem 0.25rem 1.6rem; border-bottom: 1px solid var(--color-border); }
.expertise__item h3 { font-size: var(--step-1); margin-bottom: 0.4rem; }
.expertise__item p { color: var(--color-muted); margin: 0; }
@media (min-width: 46rem) { .expertise__item { padding-inline-end: 2rem; } }

/* Process steps (a real sequence, so numbered); each step is a point on one construction line. */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); gap: 1.5rem; counter-reset: step; }
.steps li { position: relative; counter-increment: step; border-top: 1px solid var(--color-border-strong); padding-top: 1.1rem; }
.steps li::after {
  content: ""; position: absolute; top: -5px; inset-inline-start: 0; width: 9px; height: 9px; border-radius: 50%;
  background: var(--color-background); border: 1.5px solid var(--color-primary);
}
.steps li::before { content: "0" counter(step); font-family: var(--mono); color: var(--color-primary); font-size: 0.8rem; display: block; margin-bottom: 0.4rem; }
.steps h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.steps p { color: var(--color-muted); margin: 0; font-size: 0.95rem; }

/* Split block (about / enterprise) */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 1rem + 3vw, 4rem); align-items: start; }
@media (max-width: 52rem) { .split { grid-template-columns: 1fr; } }
.split__media { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border); box-shadow: var(--shadow-1); }

.facts { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 0.6rem; }
.facts li { display: flex; gap: 0.75rem; align-items: baseline; }
.facts li::before { content: ""; flex: none; width: 7px; height: 7px; border-radius: 50%; border: 1.5px solid var(--color-primary); transform: translateY(-0.12em); }

/* CTA band */
.cta-band {
  position: relative; border: 1px solid var(--color-border-strong); border-radius: var(--radius-lg); padding: clamp(1.75rem, 1rem + 3vw, 3.25rem);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-surface) 70%); box-shadow: var(--shadow-2);
  display: grid; grid-template-columns: 1fr auto; gap: 1.5rem 3rem; align-items: center;
}
@media (max-width: 46rem) { .cta-band { grid-template-columns: 1fr; } }
.cta-band h2 { font-size: var(--step-3); margin-bottom: 0.3rem; }
.cta-band p { color: var(--color-text); margin: 0; max-width: 50ch; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* ---------- Page header / breadcrumbs ---------- */
.page-head { padding-block: clamp(2.5rem, 1.5rem + 4vw, 5rem) clamp(1.75rem, 1rem + 2vw, 2.75rem); border-bottom: 1px solid var(--color-border); }
.page-head h1 { font-size: var(--step-4); max-width: 22ch; margin-bottom: 0.4em; letter-spacing: -0.025em; }
.page-head__lead { font-size: var(--step-1); color: var(--color-muted); max-width: 52ch; margin: 0; line-height: 1.65; }
.page-head__meta { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; color: var(--color-muted); font-size: var(--step--1); margin-top: 1.25rem; }
.crumbs { margin-bottom: 1.25rem; }
.page-head__actions { margin: 1.5rem 0 0; }
.page-body { padding-block: 2.5rem 4rem; }
.embed-video { margin: 2em 0; max-width: none !important; }
.crumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 0.5rem; font-size: var(--step--1); color: var(--color-muted); }
.crumbs li + li::before { content: "/"; margin-inline-end: 0.5rem; color: var(--color-border-strong); font-family: var(--mono); }
.crumbs a { color: var(--color-muted); text-decoration: none; }
.crumbs a:hover { color: var(--color-primary-hover); text-decoration: underline; }

/* Filters */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }
.chip {
  display: inline-flex; align-items: center; min-height: 2.75rem; padding: 0 1rem; border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong); color: var(--color-text); text-decoration: none; font-size: 0.93rem; font-weight: 500; background: var(--color-surface);
}
.chip:hover { color: var(--color-primary-hover); border-color: var(--color-primary); }
.chip[aria-current="page"], .chip[aria-pressed="true"] { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary); font-weight: 600; }
.search { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; max-width: 30rem; }
.search input { flex: 1; }

.pager { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 2.5rem; }

.empty {
  border: 1px dashed var(--color-border-strong); border-radius: var(--radius-md); padding: 2.75rem 1.5rem; text-align: center; color: var(--color-muted);
  background: var(--color-surface);
}
.empty p { margin: 0 0 1rem; }

/* Loading placeholder (skeleton); static when motion is reduced. */
.skeleton { border-radius: var(--radius-sm); background: var(--color-surface-secondary); min-height: 1em; }
@media (prefers-reduced-motion: no-preference) {
  .skeleton { background: linear-gradient(90deg, var(--color-surface-secondary) 30%, var(--color-primary-light) 50%, var(--color-surface-secondary) 70%) 0 0 / 300% 100%; animation: shimmer 1.4s linear infinite; }
  @keyframes shimmer { to { background-position: -150% 0; } }
}

/* ---------- Article ---------- */
.article-layout { display: grid; grid-template-columns: minmax(0, 46rem) minmax(0, 15rem); gap: 3rem; justify-content: space-between; padding-block: 2.5rem 4rem; }
@media (max-width: 66rem) { .article-layout { grid-template-columns: minmax(0, 1fr); } .toc { display: none; } }
.toc { position: sticky; top: calc(var(--header-h) + 1.5rem); align-self: start; font-size: 0.9rem; border-inline-start: 1px solid var(--color-border-strong); padding-inline-start: 1rem; }
.toc p { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-muted); margin-bottom: 0.6rem; }
.toc ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.45rem; }
.toc a { color: var(--color-text); text-decoration: none; }
.toc a:hover { color: var(--color-primary-hover); text-decoration: underline; }
.toc .toc--3 { padding-inline-start: 0.9rem; font-size: 0.86rem; }
.cover { margin: 0 0 2rem; border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border); }

.prose { font-size: 1.08rem; line-height: 1.85; color: var(--color-text); }
.prose > * { max-width: 70ch; }
.prose h2 { font-size: var(--step-2); margin-top: 2.2em; }
.prose h3 { font-size: var(--step-1); margin-top: 1.8em; }
.prose h4 { font-size: 1.05rem; margin-top: 1.5em; }
.prose p, .prose li { unicode-bidi: plaintext; }
.prose li { margin-bottom: 0.35em; }
.prose li::marker { color: var(--color-primary); }
.prose code {
  font-family: var(--mono); font-size: 0.86em; background: var(--color-surface-secondary); border: 1px solid var(--color-border);
  color: var(--color-heading); padding: 0.05em 0.35em; border-radius: 4px; direction: ltr; unicode-bidi: isolate;
}
.prose mark { background: var(--color-highlight); color: var(--color-heading); padding: 0 0.15em; border-radius: 2px; }
.prose .code {
  position: relative; background: var(--color-surface); border: 1px solid var(--color-border-strong); border-inline-start: 3px solid var(--color-primary);
  border-radius: var(--radius-sm); padding: 1rem 1.25rem; overflow-x: auto; font-size: 0.88rem; line-height: 1.65; text-align: left; color: var(--color-heading);
  background-image: linear-gradient(var(--blueprint-grid) 1px, transparent 1px); background-size: 100% 1.65em; background-position: 0 1rem;
}
.prose .code code { background: none; border: 0; padding: 0; font-size: 1em; }
.prose .quote { margin: 2em 0; padding-inline-start: 1.25rem; border-inline-start: 3px solid var(--color-primary); }
.prose .quote blockquote { margin: 0; font-size: 1.2rem; font-weight: 500; color: var(--color-heading); }
.prose .quote figcaption { color: var(--color-muted); margin-top: 0.5rem; font-size: 0.95rem; }
.prose .delim { border: 0; height: 1px; background: var(--color-border); margin: 2.5em 0; }
.prose .callout { border: 1px solid var(--color-border-strong); background: var(--color-primary-light); border-radius: var(--radius-sm); padding: 1rem 1.25rem; margin: 1.75em 0; }
.prose .callout p { margin: 0; }
.prose .callout__title { font-weight: 700; color: var(--color-heading); margin-bottom: 0.25rem !important; }
.prose figure.image { margin: 2em 0; }
.prose figure.image img { border-radius: var(--radius-sm); border: 1px solid var(--color-border); }
.prose figure.image--wide { max-width: none; }
.prose figcaption { color: var(--color-muted); font-size: 0.9rem; margin-top: 0.6rem; }
.table-wrap { overflow-x: auto; margin: 1.75em 0; max-width: 100% !important; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.prose th, .prose td { border-bottom: 1px solid var(--color-border); padding: 0.65rem 0.85rem; text-align: start; vertical-align: top; }
.prose tr:last-child td { border-bottom: 0; }
.prose th { background: var(--color-surface-secondary); color: var(--color-heading); font-weight: 700; }

/* Project case study: facts as a drawing title block */
.case-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr)); gap: 1px; background: var(--color-border); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); overflow: hidden; margin: 2rem 0; }
.case-facts div { background: var(--color-surface); padding: 1rem 1.2rem; }
.case-facts dt { font-size: 0.8rem; font-weight: 600; color: var(--color-primary); margin-bottom: 0.25rem; }
.case-facts dd { margin: 0; font-weight: 600; color: var(--color-heading); }
.case-section { margin-block: 2.5rem; }
.case-section h2 { font-size: var(--step-2); }

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr)); gap: 0.75rem; margin: 2rem 0; }
.gallery figure { margin: 0; }
.gallery figcaption, .cover figcaption { margin-top: 0.4rem; font-size: 0.85rem; color: var(--color-muted); }
.gallery .credit, .cover .credit { white-space: nowrap; }
.gallery a { display: block; border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--color-border); aspect-ratio: 4 / 3; background: var(--color-surface-secondary); }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s var(--ease); }
.gallery a:hover img { transform: scale(1.03); }

/* Lecture page */
.lecture-aside { position: sticky; top: calc(var(--header-h) + 1.5rem); align-self: start; display: grid; gap: 1rem; }
.box { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); padding: 1.25rem; box-shadow: var(--shadow-1); }
.lecture-aside dl { margin: 0; display: grid; gap: 0.75rem; }
.lecture-aside dt { color: var(--color-muted); font-size: 0.85rem; }
.lecture-aside dd { margin: 0; font-weight: 600; color: var(--color-heading); }
.checklist { list-style: none; padding: 0; display: grid; gap: 0.6rem; }
.checklist li { display: flex; gap: 0.7rem; align-items: baseline; }
.checklist li::before { content: "✓"; color: var(--color-success); font-weight: 800; flex: none; }

/* ---------- Video ---------- */
.video-card { position: relative; display: flex; flex-direction: column; gap: 0.75rem; }
.video-card__frame {
  position: relative; display: block; width: 100%; aspect-ratio: 9 / 16; border-radius: var(--radius-md); overflow: hidden;
  background: var(--color-surface-secondary) center / cover no-repeat; border: 1px solid var(--color-border); box-shadow: var(--shadow-1);
  cursor: pointer; padding: 0; color: var(--color-on-primary); max-height: 36rem;
}
.video-card__frame[data-aspect="16:9"] { aspect-ratio: 16 / 9; }
/* No cover image: blueprint grid with the title, so the card never looks empty. */
.video-card__fallback, .facade--blank {
  background-color: var(--color-surface-secondary);
  background-image: linear-gradient(var(--blueprint-grid-major) 1px, transparent 1px), linear-gradient(90deg, var(--blueprint-grid-major) 1px, transparent 1px),
    linear-gradient(var(--blueprint-grid) 1px, transparent 1px), linear-gradient(90deg, var(--blueprint-grid) 1px, transparent 1px);
  background-size: 4rem 4rem, 4rem 4rem, 1rem 1rem, 1rem 1rem;
}
.video-card__fallback {
  position: absolute; inset: 0; display: flex; align-items: flex-start; padding: 3rem 1rem 4.5rem;
  color: var(--color-heading); font-weight: 700; font-size: 1.15rem; line-height: 1.35; text-align: start; overflow: hidden;
}
.video-card__frame[data-aspect="1:1"] { aspect-ratio: 1; }
.video-card__frame[data-aspect="4:5"] { aspect-ratio: 4 / 5; }
.video-card__frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.video-card__frame:has(img)::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, var(--color-scrim-soft), transparent 50%); }
.video-card__play {
  position: absolute; z-index: 1; inset-block-end: 1rem; inset-inline-start: 1rem;
  display: inline-flex; align-items: center; gap: 0.5rem; min-height: 2.75rem; padding: 0 1rem 0 0.8rem; border-radius: var(--radius-pill);
  background: var(--color-surface); color: var(--color-heading); font-weight: 700; font-size: 0.92rem; box-shadow: var(--shadow-2);
}
.video-card__play svg { width: 1rem; height: 1rem; color: var(--color-primary); }
.video-card__frame:hover .video-card__play, .video-card__frame:focus-visible .video-card__play { background: var(--color-primary); color: var(--color-on-primary); }
.video-card__frame:hover .video-card__play svg, .video-card__frame:focus-visible .video-card__play svg { color: var(--color-on-primary); }
.video-card__frame:focus-visible { outline: 2px solid transparent; box-shadow: var(--focus-ring); }
.video-card__badge {
  position: absolute; z-index: 1; top: 0.75rem; inset-inline-end: 0.75rem; font-family: var(--mono); font-size: 0.72rem;
  background: var(--color-scrim); color: var(--color-on-primary); padding: 0.2rem 0.5rem; border-radius: 4px; direction: ltr;
}
.video-card__title { font-size: 1.05rem; margin: 0; }
.video-card__title a { color: var(--color-heading); text-decoration: none; }
.video-card__title a:hover { color: var(--color-primary-hover); text-decoration: underline; }
.video-card__text { color: var(--color-muted); font-size: 0.92rem; margin: 0; }
.video-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 15.5rem), 1fr)); }
.video-grid--featured { grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 20rem)); justify-content: start; }

.player { position: relative; margin: 0 auto; width: 100%; background: var(--color-player); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border-strong); box-shadow: var(--shadow-2); }
.player[data-aspect="9:16"] { max-width: 24rem; aspect-ratio: 9 / 16; }
.player[data-aspect="16:9"] { aspect-ratio: 16 / 9; }
.player[data-aspect="1:1"] { max-width: 34rem; aspect-ratio: 1; }
.player[data-aspect="4:5"] { max-width: 30rem; aspect-ratio: 4 / 5; }
.player iframe, .player video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: var(--color-player); }
/* Instagram's embed is a tall card (header, reel, caption) whatever the clip's shape: never crop it to 16:9. */
.player--instagram { aspect-ratio: auto; height: min(80vh, 46rem); max-width: 26rem; background: var(--color-surface); }

.facade { position: absolute; inset: 0; display: grid; place-items: center; background: var(--color-surface-secondary) center / cover no-repeat; }
.facade__play {
  display: grid; place-items: center; width: 4.5rem; height: 4.5rem; border: 0; border-radius: 50%; cursor: pointer;
  background: var(--color-primary); color: var(--color-on-primary); box-shadow: var(--shadow-2); transition: transform .2s var(--ease), background .2s var(--ease);
}
.facade__play::after { content: ""; position: absolute; inset: 0; }
.facade__play svg { width: 1.9rem; height: 1.9rem; margin-inline-end: -0.2rem; }
.facade__play:hover { background: var(--color-primary-hover); transform: scale(1.06); }
.facade__play:focus-visible { outline: 2px solid transparent; box-shadow: var(--focus-ring); }
.facade__note {
  position: absolute; z-index: 1; inset-inline: 0; inset-block-end: 0; margin: 0; padding: 0.5rem 0.75rem;
  background: var(--color-glass); font-size: 0.8rem; color: var(--color-text); text-align: center;
}
.facade__note a { position: relative; z-index: 1; }
.player-source { margin: 0.5rem auto 0; text-align: center; font-size: 0.9rem; }
.player-error { position: absolute; inset: 0; display: grid; place-content: center; gap: 0.75rem; padding: 1.5rem; text-align: center; background: var(--color-surface); color: var(--color-text); }

.video-dialog {
  width: min(100% - 2rem, 60rem); max-height: calc(100vh - 2rem); padding: 0; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-3);
}
.video-dialog::backdrop { background: var(--color-backdrop); backdrop-filter: blur(2px); }
/* Phones: the video takes the whole screen. */
@media (max-width: 40rem) {
  .video-dialog[open] {
    display: flex; flex-direction: column; width: 100%; max-width: none; height: 100dvh; max-height: none;
    margin: 0; inset: 0; border: 0; border-radius: 0;
  }
  .video-dialog[open] .video-dialog__body { flex: 1; min-height: 0; max-height: none; padding: 0.5rem; display: flex; flex-direction: column; justify-content: center; }
  .video-dialog[open] .player { max-height: 100%; }
  .video-dialog[open] .player--instagram { height: 100%; max-width: none; flex: 1; border-radius: var(--radius-sm, 8px); }
  .video-dialog[open] .player[data-aspect="9:16"]:not(.player--instagram) { height: 100%; width: auto; max-width: 100%; }
  .video-dialog__foot { padding: 0.5rem 1rem calc(0.75rem + env(safe-area-inset-bottom)); }
}
.video-dialog__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.75rem 1rem; border-bottom: 1px solid var(--color-border); }
.video-dialog__head h2 { font-size: 1.05rem; margin: 0; }
.video-dialog__body { padding: 1rem; overflow-y: auto; max-height: calc(100vh - 8rem); background: var(--color-surface-secondary); }
.video-dialog__foot, .video-dialog__foot > div { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; font-size: 0.9rem; }
.video-dialog__foot { padding: 0.75rem 1rem 1rem; border-top: 1px solid var(--color-border); }
.icon-btn {
  display: inline-grid; place-items: center; width: 2.75rem; height: 2.75rem; border-radius: var(--radius-sm); flex: none;
  border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-heading); cursor: pointer;
}
.icon-btn:hover { background: var(--color-surface-secondary); border-color: var(--color-border-strong); }
.icon-btn svg { width: 1.2rem; height: 1.2rem; }

.transcript { margin-top: 1.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); }
.transcript summary { cursor: pointer; padding: 0.85rem 1rem; font-weight: 600; min-height: 2.75rem; color: var(--color-heading); }
.transcript div { padding: 0 1rem 1rem; color: var(--color-text); white-space: pre-line; }

/* ---------- Forms ---------- */
.form { display: grid; gap: 1.25rem; }
.form__row { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); }
.field { display: grid; gap: 0.4rem; }
.field label, .field legend { font-weight: 600; font-size: 0.95rem; color: var(--color-heading); }
.field .hint { color: var(--color-muted); font-size: 0.85rem; margin: 0; }
.field .error { color: var(--color-error); font-size: 0.88rem; margin: 0; font-weight: 500; }
.req { color: var(--color-error); }
input[type="text"], input[type="email"], input[type="tel"], input[type="search"], input[type="url"], input[type="date"], input[type="number"], select, textarea {
  width: 100%; min-height: 2.9rem; padding: 0.6rem 0.85rem; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-input); background: var(--color-surface); color: var(--color-heading);
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
input::placeholder, textarea::placeholder { color: var(--color-muted); opacity: 1; }
textarea { min-height: 9rem; resize: vertical; line-height: 1.6; }
input:hover, select:hover, textarea:hover { border-color: var(--color-heading); }
input:focus, select:focus, textarea:focus { border-color: var(--color-primary); outline: 2px solid transparent; box-shadow: 0 0 0 3px var(--color-primary-light), 0 0 0 4px var(--color-primary); }
[aria-invalid="true"] { border-color: var(--color-error) !important; }
fieldset { border: 0; padding: 0; margin: 0; }
.choices { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.choices label { position: relative; }
.choices input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.choices span {
  display: inline-flex; align-items: center; min-height: 2.75rem; padding: 0 1rem; border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-input); background: var(--color-surface); color: var(--color-text); cursor: pointer; font-weight: 500;
}
.choices span:hover { border-color: var(--color-primary); }
.choices input:checked + span { background: var(--color-primary-light); color: var(--color-primary-hover); border-color: var(--color-primary); font-weight: 700; box-shadow: inset 0 0 0 1px var(--color-primary); }
.choices input:focus-visible + span { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.hp { position: absolute !important; inset-inline-start: -10000px; width: 1px; height: 1px; overflow: hidden; }
.notice { border: 1px solid var(--color-border-strong); border-inline-start-width: 4px; border-radius: var(--radius-sm); padding: 1rem 1.25rem; background: var(--color-surface); }
.notice--ok { border-color: var(--color-success); background: var(--color-success-bg); }
.notice--error { border-color: var(--color-error); background: var(--color-error-bg); }
.notice h2 { font-size: 1.15rem; margin-bottom: 0.3rem; }
.notice p:last-child, .notice ul:last-child { margin-bottom: 0; }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: clamp(2rem, 1rem + 3vw, 4rem); padding-block: 2.5rem 4rem; }
@media (max-width: 56rem) { .contact-grid { grid-template-columns: 1fr; } }
.contact-aside { display: grid; gap: 1rem; align-content: start; }
.contact-aside a { word-break: break-word; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--color-border); background: var(--color-surface); padding-block: 3.5rem 2rem; font-size: 0.95rem; }
.site-footer__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); gap: 2rem; }
@media (max-width: 56rem) { .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 34rem) { .site-footer__grid { grid-template-columns: 1fr; } }
.site-footer h2 { font-size: 0.8rem; font-family: var(--mono); color: var(--color-primary); font-weight: 500; margin-bottom: 0.9rem; direction: ltr; text-align: end; letter-spacing: 0.02em; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.1rem; }
.site-footer ul a { display: inline-flex; align-items: center; min-height: 2.25rem; color: var(--color-text); text-decoration: none; }
.site-footer ul a:hover { color: var(--color-primary-hover); text-decoration: underline; }
.site-footer__about p { color: var(--color-muted); max-width: 38ch; }
.site-footer__about .brand { margin-bottom: 1rem; }
.site-footer__logo { display: block; height: auto; max-height: 4rem; width: auto; max-width: 16rem; margin-bottom: 1rem; }
.site-footer__legal { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--color-border); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem 2rem; color: var(--color-muted); font-size: 0.85rem; }
.site-footer__legal a { color: var(--color-muted); }


/* ---------- Toast ---------- */
.toast {
  position: fixed; z-index: 70; inset-block-end: 1.25rem; inset-inline: 1rem; margin-inline: auto; width: fit-content;
  display: flex; align-items: center; gap: 0.75rem; max-width: min(100% - 2rem, 30rem); padding: 0.85rem 1.1rem;
  background: var(--color-surface); color: var(--color-heading); border: 1px solid var(--color-border); border-inline-start: 4px solid var(--color-primary);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-3); font-weight: 500;
}
.toast--ok { border-inline-start-color: var(--color-success); }
.toast--error { border-inline-start-color: var(--color-error); }

/* ---------- Accessibility panel ---------- */
.a11y-btn-float {
  position: fixed; z-index: 40; inset-block-end: 1rem; inset-inline-end: 1rem; width: 3rem; height: 3rem; border-radius: 50%;
  background: var(--color-primary); color: var(--color-on-primary); border: 2px solid var(--color-surface); display: grid; place-items: center; cursor: pointer;
  box-shadow: var(--shadow-3);
}
.a11y-btn-float:hover { background: var(--color-primary-hover); }
.a11y-btn-float svg { width: 1.6rem; height: 1.6rem; }
.a11y-dialog { width: min(100% - 2rem, 24rem); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); color: var(--color-text); padding: 0; box-shadow: var(--shadow-3); }
.a11y-dialog::backdrop { background: var(--color-backdrop); }
.a11y-dialog__head { display: flex; justify-content: space-between; align-items: center; padding: 0.75rem 1rem; border-bottom: 1px solid var(--color-border); }
.a11y-dialog__head h2 { font-size: 1.05rem; margin: 0; }
.a11y-dialog__body { padding: 1rem; display: grid; gap: 0.5rem; }
.a11y-dialog__body .row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.a11y-opt { min-height: 2.9rem; border-radius: var(--radius-sm); border: 1px solid var(--color-border-input); background: var(--color-surface); color: var(--color-heading); cursor: pointer; font-weight: 500; padding: 0.4rem 0.6rem; }
.a11y-opt:hover { border-color: var(--color-primary); }
.a11y-opt[aria-pressed="true"] { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary); }
.a11y-size { margin: 0; font-size: 0.85rem; color: var(--color-muted); }
.a11y-dialog__foot { padding: 0 1rem 1rem; font-size: 0.88rem; }

/* High-contrast mode values live in tokens.css (html.a11y-contrast). */
html.a11y-contrast .hero::before, html.a11y-contrast .page-head::before, html.a11y-contrast .railed::before { display: none; }
html.a11y-grayscale body { filter: grayscale(1); }
html.a11y-links a { text-decoration: underline !important; text-decoration-thickness: 2px !important; outline: 1px dashed currentColor; outline-offset: 2px; }
html.a11y-readable body { font-family: Arial, "Helvetica Neue", sans-serif; letter-spacing: 0.02em; word-spacing: 0.08em; }
html.a11y-readable .mono { font-family: Arial, sans-serif; }
html.a11y-cursor, html.a11y-cursor * { cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 24 24'%3E%3Cpath d='M4 2l16 10-7 1.5L9.5 21z' fill='%23fff' stroke='%23000' stroke-width='1.5'/%3E%3C/svg%3E") 4 2, auto !important; }
html.a11y-still *, html.a11y-still *::before, html.a11y-still *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }

/* ---------- Motion ---------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

@media print {
  .site-header, .site-footer, .a11y-btn-float, .toc, .skip-link, .hero::before, .page-head::before { display: none !important; }
  body { background: var(--color-surface); color: var(--color-heading); }
  .card, .box, .ledger { box-shadow: none; }
  .prose a::after { content: " (" attr(href) ")"; font-size: 0.85em; }
}

/* Admin preview banner (drafts only; never shown to the public) */
.preview-bar { position: sticky; top: 0; z-index: 60; background: var(--color-warning-bg); color: var(--color-warning); border-bottom: 1px solid var(--color-warning); text-align: center; font-weight: 600; font-size: 0.9rem; padding: 0.45rem 1rem; }

/* == Services & AI pages (services.php, ai.php) == */
.svc-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.svc-index ol { list-style: none; padding: 0; margin: 0 0 2rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
/* Service sheet: one row per area, referenced like a drawing sheet (number + route key). */
.svc-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--color-border-strong); }
.svc { display: grid; gap: 0.5rem 2.5rem; padding-block: 1.75rem 2rem; border-bottom: 1px solid var(--color-border); scroll-margin-top: calc(var(--header-h) + 1rem); }
@media (min-width: 62rem) { .svc { grid-template-columns: 6.5rem minmax(0, 1fr) minmax(0, 17rem); padding-block: 2.25rem 2.5rem; } }
.svc__ref { margin: 0; display: flex; justify-content: flex-end; gap: 0.6rem; font-family: var(--mono); font-size: var(--step--1); color: var(--color-primary); direction: ltr; line-height: 2; }
.svc__ref span { color: var(--color-muted); }
.svc__main h3 { font-size: var(--step-2); margin-bottom: 0.4rem; }
.svc__lead { color: var(--color-text); max-width: 60ch; margin: 0; }
.svc__label { font-size: var(--step--1); font-weight: 600; color: var(--color-muted); letter-spacing: 0.01em; margin: 1.25rem 0 0.5rem; }
.svc__gets { margin: 0; }
.svc__aside { display: flex; flex-direction: column; align-items: flex-start; gap: 0.75rem; }
.svc__aside .svc__label { margin: 0.75rem 0 0; }
@media (min-width: 62rem) { .svc__aside { padding-inline-start: 1.5rem; border-inline-start: 1px dashed var(--color-border-strong); } .svc__aside .svc__label { margin-top: 0.4rem; } }
.svc__links { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.1rem; font-size: 0.95rem; }
.svc__links li { display: flex; flex-direction: column; justify-content: center; min-height: 2.75rem; line-height: 1.5; }
.svc__links a { font-weight: 600; align-self: flex-start; }
.svc__links small { color: var(--color-muted); font-size: 0.86rem; }
.ai-guard__text h2 { font-size: var(--step-3); }
.ai-guard__text p { max-width: 46ch; }
.ai-guard .ledger__row { grid-template-columns: 7.5rem 1fr; }
.ai-principles { margin: 0; grid-template-columns: repeat(auto-fill, minmax(min(100%, 26rem), 1fr)); gap: 1rem 2.5rem; }

/* == Contact & Enterprise pages (contact.php, enterprise.php) == */
.contact-main { display: grid; gap: 1.25rem; align-content: start; min-width: 0; }
.contact-main__title { font-size: var(--step-2); margin: 0; }
.contact-main .field { align-content: start; }
.contact-main .notice h2, .contact-main .notice h3 { font-size: 1.15rem; margin-bottom: 0.3rem; }
.contact-main .notice:focus-visible, .contact-main .notice:focus { outline: 2px solid var(--color-primary); outline-offset: 3px; }
.contact-errors ul { margin: 0.5rem 0 0; }
.contact-errors a { color: var(--color-error); font-weight: 600; }
.contact-lecture { margin: 0; }
.contact-reach { display: grid; gap: 0.6rem; }
.contact-reach legend { font-weight: 600; font-size: 0.95rem; color: var(--color-heading); padding: 0; margin-bottom: 0.15rem; }
.contact-reach .hint { color: var(--color-muted); font-size: 0.85rem; margin: 0; }
.contact-req, .contact-privacy { margin: 0; color: var(--color-muted); font-size: 0.9rem; }
.contact-done p:last-child a { display: inline-flex; align-items: center; min-height: 2.75rem; }
.contact-aside__title { font-size: 1.05rem; margin-bottom: 0.75rem; }
.contact-aside__text { margin: 0 0 0.25rem; font-size: 0.95rem; }
.contact-channels { margin: 0; display: grid; gap: 0.85rem; }
.contact-channels dt { color: var(--color-muted); font-size: 0.85rem; }
.contact-channels dd { margin: 0; font-weight: 600; color: var(--color-heading); }
.contact-channels a { display: inline-flex; align-items: center; min-height: 2.75rem; }
.ent-product__sub { margin: 0; font-weight: 600; color: var(--color-primary-hover); font-size: 0.95rem; }
.ent-principles__title { font-size: var(--step-3); }
.ent-principles { margin-top: 0; }


/* == Legal pages (pages/*) == */
/* TOC comes first in the DOM (keyboard order); on wide screens it moves to the side column. */
.legal__toc { order: 2; }
.legal__body > section:first-child h2 { margin-top: 0; }
.legal__body section { scroll-margin-top: calc(var(--header-h) + 1rem); }
.legal__body kbd {
  font-family: var(--mono); font-size: 0.82em; direction: ltr; unicode-bidi: isolate; padding: 0.05em 0.4em;
  border: 1px solid var(--color-border-strong); border-bottom-width: 2px; border-radius: 4px; background: var(--color-surface); color: var(--color-heading);
}
.legal__more { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }
.legal__more h2 { font-size: var(--step-1); margin-top: 0; }
.legal__more ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.legal__more a { display: inline-flex; align-items: center; min-height: 2.75rem; }
.legal__body a[href^="mailto:"], .legal__body a[href^="tel:"] { display: inline-block; min-height: 1.5rem; word-break: break-word; }
@media (max-width: 66rem) {
  .legal__layout { gap: 2rem; }
  .legal .legal__toc {
    display: block; position: static; order: 0; border: 1px solid var(--color-border); border-radius: var(--radius-md);
    background: var(--color-surface); padding: 1rem 1.25rem;
  }
  .legal__toc ol { grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr)); gap: 0 1.25rem; }
  .legal__toc a { display: inline-flex; align-items: center; min-height: 2.25rem; }
}
@media print { .legal .legal__toc, .legal__more { display: none !important; } }