/* Hallmark · macrostructure: Narrative Workflow · tone: austere, clinical-calm · anchor hue: grey-blue 232 + vessel red 25
 * genre: modern-minimal · theme: studied-DNA · studied: yes · DNA-source: image (user video reference, frames only)
 * hero: H2 split diptych inside a rounded sky card · F4 steps: numbering=01/02/03, layout=text-left demo-right, connector=hairline
 * nav: N1b-lite in hero card · footer: Ft5 statement + clipped wordmark · enrichment: Tier C generated still (own style prompt)
 */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-tight);
  margin: 0;
  overflow-wrap: anywhere;
  min-width: 0;
  text-wrap: balance;
}
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; border-radius: var(--radius-sm); }

.skip {
  position: absolute; left: var(--space-sm); top: -4rem; z-index: 10;
  background: var(--color-ink); color: var(--color-paper);
  padding: var(--space-2xs) var(--space-sm); border-radius: var(--radius-pill);
  text-decoration: none;
}
.skip:focus { top: var(--space-sm); }

/* ---------- Buttons and links ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 2.75rem; padding: 0 var(--space-md);
  border-radius: var(--radius-pill);
  font-family: var(--font-body); font-weight: 500; font-size: var(--text-sm);
  text-decoration: none; white-space: nowrap;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.btn:active { transform: translateY(1px); }
.btn--small { min-height: 2.25rem; padding: 0 var(--space-sm); }
.btn--light { background: var(--color-surface-raised); color: var(--color-ink); }
.btn--light:hover { background: var(--color-surface); }
.btn--ghost { background: var(--color-glass-on-sky); color: var(--color-on-sky); border-color: var(--color-chip-line-on-sky); }
.btn--ghost:hover { background: var(--color-glass-on-sky-hover); }

.link {
  display: inline-flex; gap: var(--space-3xs); align-items: baseline; white-space: nowrap;
  font-weight: 500; font-size: var(--text-sm); color: var(--color-ink);
  text-decoration: underline; text-decoration-color: var(--color-line-strong);
  text-underline-offset: 0.3em; text-decoration-thickness: 1px;
  transition: text-decoration-color var(--dur-fast) var(--ease-out);
}
.link:hover { text-decoration-color: var(--color-ink); }

/* ---------- Hero card ---------- */
.hero {
  position: relative;
  margin: var(--space-2xs);
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: var(--color-on-sky);
  background: linear-gradient(180deg, var(--color-sky-top) 0%, var(--color-sky-mid) 46%, var(--color-sky-image-top) 72%);
  isolation: isolate;
}
.nav {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-md);
  max-width: var(--measure-page); margin: 0 auto;
  padding: var(--space-sm) var(--gutter);
}
.nav__brand {
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-md);
  letter-spacing: var(--tracking-tight); text-decoration: none; white-space: nowrap;
}
.nav__links { display: flex; gap: var(--space-3xs); }
.nav__links a {
  display: inline-block; padding: var(--space-3xs) var(--space-xs);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm); text-decoration: none; color: var(--color-on-sky-soft);
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.nav__links a:hover { background: var(--color-chip-on-sky); color: var(--color-on-sky); }

.hero__intro {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: var(--space-xl);
  max-width: var(--measure-page); margin: 0 auto;
  padding: var(--space-xl) var(--gutter) 0;
  align-items: end;
}
.chips { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-bottom: var(--space-md); }
.chip {
  display: inline-flex; align-items: center; min-height: 1.75rem;
  padding: 0 var(--space-xs); border-radius: var(--radius-pill);
  font-size: var(--text-xs); font-weight: 500;
  background: var(--color-glass-on-sky); color: var(--color-on-sky);
}
.chip--outline { background: transparent; border: 1px solid var(--color-chip-line-on-sky); }
.hero h1 { font-size: var(--text-hero); }
.hero__lede p { color: var(--color-on-sky-soft); font-size: var(--text-base); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-top: var(--space-md); }

.hero__figure { margin: calc(var(--space-lg) * -1) 0 0; position: relative; z-index: -1; }
.hero__figure img {
  width: 100%; aspect-ratio: 2400 / 1100; object-fit: cover; object-position: 50% 78%;
  /* Fade the render's own sky into the card gradient so there is no seam. */
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, var(--color-ink) 34%);
  mask-image: linear-gradient(to bottom, transparent 0%, var(--color-ink) 34%);
}

/* ---------- Sections ---------- */
.section {
  max-width: var(--measure-page); margin: 0 auto;
  padding: var(--space-3xl) var(--gutter) 0;
}
.section--wide { max-width: var(--measure-wide); }
.section--wide .section__head { max-width: calc(var(--measure-page) - 2 * var(--gutter)); margin: 0 auto; }
.section h2 { font-size: var(--text-xl); max-width: 18ch; }
.section__lede { color: var(--color-muted); margin-top: var(--space-xs); max-width: 52ch; }

/* Audience cards */
.cards {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xs);
  margin-top: var(--space-lg);
}
.card {
  background: var(--color-surface); border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-sm) var(--space-md);
}
.card h3 {
  display: flex; align-items: center; gap: var(--space-2xs);
  font-family: var(--font-body); font-weight: 600; letter-spacing: 0; font-size: var(--text-sm);
  margin-bottom: var(--space-2xs);
}
.card p { font-size: var(--text-sm); color: var(--color-ink-soft); }
.icon {
  flex: none; width: 1.75rem; height: 1.75rem; padding: var(--space-3xs);
  border-radius: 50%; background: var(--color-surface-raised); box-shadow: var(--shadow-soft);
  fill: none; stroke: var(--color-ink); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
}

/* Method steps */
.steps { margin-top: var(--space-lg); border-top: 1px solid var(--color-line); }
.step {
  display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: var(--space-lg);
  padding: var(--space-lg) 0; border-bottom: 1px solid var(--color-line);
  align-items: center;
}
.step__num { font-size: var(--text-xs); color: var(--color-muted); font-variant-numeric: tabular-nums; margin-bottom: var(--space-2xs); }
.step h3 { font-family: var(--font-body); font-weight: 600; letter-spacing: 0; font-size: var(--text-md); margin-bottom: var(--space-2xs); }
.step__text > p:not(.step__num) { font-size: var(--text-sm); color: var(--color-ink-soft); margin-bottom: var(--space-sm); }
.step__demo {
  background: var(--color-surface); border-radius: var(--radius-lg);
  min-height: 18rem; display: grid; place-items: center; padding: var(--space-lg) var(--space-md);
}

.demo-card {
  width: min(100%, 16.5rem);
  background: var(--color-surface-raised); border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft); padding: var(--space-sm);
  font-size: var(--text-xs);
}
.demo-card__head { display: flex; justify-content: space-between; gap: var(--space-2xs); font-weight: 600; margin-bottom: var(--space-xs); }
.demo-card__meta { font-weight: 400; color: var(--color-muted); }

.demo-poll__q { color: var(--color-ink-soft); margin-bottom: var(--space-2xs); }
.demo-option {
  display: block; text-align: center; padding: var(--space-2xs);
  border: 1px solid var(--color-line); border-radius: var(--radius-sm);
  margin-top: var(--space-2xs);
}
.demo-option--picked { animation: pick 4.8s var(--ease-in-out) infinite; }
@keyframes pick {
  0%, 22% { background: var(--color-surface-raised); color: var(--color-ink); border-color: var(--color-line); }
  30%, 88% { background: var(--color-ink); color: var(--color-paper); border-color: var(--color-ink); }
  100% { background: var(--color-surface-raised); color: var(--color-ink); border-color: var(--color-line); }
}

.demo-pipeline { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-2xs); padding-top: var(--space-lg); }
.demo-stage {
  position: relative;
  display: grid; place-items: center; min-width: 3.5rem; height: 3.25rem; padding: 0 var(--space-2xs);
  background: var(--color-surface-raised); border-radius: var(--radius-sm); box-shadow: var(--shadow-soft);
  font-size: var(--text-xs); color: var(--color-ink-soft);
}
.demo-stage--active { background: var(--color-ink); color: var(--color-paper); height: 3.75rem; }
.demo-tip {
  position: absolute; bottom: calc(100% + var(--space-2xs)); left: 50%; transform: translateX(-50%);
  white-space: nowrap; padding: 0.15rem var(--space-2xs);
  background: var(--color-surface-raised); color: var(--color-ink); border-radius: var(--radius-pill);
  box-shadow: var(--shadow-soft); font-weight: 600; font-size: 0.6875rem;
  animation: tip 4.8s var(--ease-out) infinite;
}
@keyframes tip {
  0%, 12% { opacity: 0; transform: translate(-50%, 4px); }
  22%, 86% { opacity: 1; transform: translate(-50%, 0); }
  100% { opacity: 0; transform: translate(-50%, 4px); }
}

.demo-progress__row { display: flex; justify-content: space-between; color: var(--color-muted); margin-bottom: var(--space-2xs); }
.demo-bar { display: block; height: 0.375rem; border-radius: var(--radius-pill); background: var(--color-line); overflow: hidden; }
.demo-bar__fill {
  display: block; height: 100%; width: 100%; background: var(--color-ink);
  transform-origin: left; animation: fill 4.8s var(--ease-out) infinite;
}
@keyframes fill {
  0% { transform: scaleX(0.08); }
  55%, 100% { transform: scaleX(1); }
}
.demo-done {
  display: inline-flex; align-items: center; gap: var(--space-3xs);
  margin-top: var(--space-xs); padding: 0.2rem var(--space-2xs) 0.2rem 0.3rem;
  border-radius: var(--radius-pill); background: var(--color-ink); color: var(--color-paper);
  font-weight: 500; animation: done 4.8s var(--ease-out) infinite;
}
.demo-done svg { width: 0.9rem; height: 0.9rem; fill: none; stroke: var(--color-ok); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
@keyframes done {
  0%, 52% { opacity: 0; transform: translateY(4px); }
  62%, 94% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(4px); }
}

/* Work */
.work {
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--space-sm);
  margin-top: var(--space-lg);
}
.work__item {
  grid-column: span 2;
  display: flex; flex-direction: column; gap: var(--space-sm);
  background: var(--color-surface); border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-sm) var(--space-md);
}
.work__item--feature { grid-column: span 6; display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); align-items: center; gap: var(--space-xl); padding: var(--space-md); }
.work__item--posts { grid-column: span 6; display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: center; gap: var(--space-lg); padding: var(--space-md); }
.work__text h3 { font-family: var(--font-body); font-weight: 600; letter-spacing: 0; font-size: var(--text-md); margin-bottom: var(--space-2xs); }
.work__text p { font-size: var(--text-sm); color: var(--color-ink-soft); }
.work__text .link { margin-top: var(--space-xs); }
.work__item--feature .work__text h3 { font-family: var(--font-display); font-weight: 700; letter-spacing: var(--tracking-display); font-size: var(--text-lg); }
.work__hint { margin-top: var(--space-xs); color: var(--color-muted) !important; font-size: var(--text-xs) !important; }
.work__shot { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: var(--radius-md); background: var(--color-surface-raised); }
.work__shot--tall { object-position: 50% 22%; }

.compare {
  position: relative; aspect-ratio: 3 / 4; width: 100%; max-width: 24rem; justify-self: center;
  border-radius: var(--radius-md); overflow: hidden; background: var(--color-surface-raised);
  box-shadow: var(--shadow-soft); --pos: 50%;
  touch-action: pan-y;
}
.compare__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.compare__img--contain { object-fit: contain; background: var(--color-surface-raised); }
.compare__before { position: absolute; inset: 0; clip-path: inset(0 calc(100% - var(--pos)) 0 0); }
.compare__label {
  position: absolute; top: var(--space-xs); z-index: 2;
  padding: 0.15rem var(--space-2xs); border-radius: var(--radius-pill);
  background: var(--color-surface-raised); color: var(--color-ink);
  font-size: var(--text-xs); font-weight: 600; box-shadow: var(--shadow-soft);
}
.compare__label--left { left: var(--space-xs); }
.compare__label--right { right: var(--space-xs); }
.compare::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: var(--pos); width: 2px; margin-left: -1px;
  background: var(--color-surface-raised); z-index: 1; pointer-events: none;
}
.compare__knob {
  position: absolute; top: 50%; left: var(--pos); z-index: 2;
  width: 2.5rem; height: 2.5rem; margin: -1.25rem 0 0 -1.25rem;
  display: grid; place-items: center; border-radius: 50%;
  background: var(--color-surface-raised); box-shadow: var(--shadow-knob); pointer-events: none;
}
.compare__knob svg { width: 1.1rem; height: 1.1rem; fill: none; stroke: var(--color-ink); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.compare__range {
  position: absolute; inset: 0; z-index: 3; width: 100%; height: 100%; margin: 0;
  opacity: 0; cursor: ew-resize; -webkit-appearance: none; appearance: none; background: transparent;
}
.compare:has(.compare__range:focus-visible) { outline: 2px solid var(--color-focus); outline-offset: 3px; }

.posts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xs); margin: 0; }
.posts figure { margin: 0; }
.posts img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: var(--radius-md); background: var(--color-surface-raised); }
.posts figcaption { margin-top: var(--space-2xs); font-size: var(--text-xs); color: var(--color-muted); }
.posts figcaption strong { color: var(--color-ink); font-weight: 600; }

.covers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-2xs); }
.covers img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; border-radius: var(--radius-sm); box-shadow: var(--shadow-soft); }

/* Teaching table */
.talks { width: 100%; border-collapse: collapse; margin-top: var(--space-lg); font-size: var(--text-sm); }
.talks th { text-align: left; font-weight: 500; font-size: var(--text-xs); color: var(--color-muted); padding: 0 var(--space-xs) var(--space-2xs) 0; border-bottom: 1px solid var(--color-line-strong); }
.talks td { padding: var(--space-xs) var(--space-xs) var(--space-xs) 0; border-bottom: 1px solid var(--color-line); vertical-align: top; color: var(--color-ink-soft); }
.talks td:first-child { font-variant-numeric: tabular-nums; color: var(--color-ink); font-weight: 500; white-space: nowrap; }
.talks td:nth-child(2) { color: var(--color-ink); }

/* About */
.about { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: var(--space-lg); margin-top: var(--space-lg); align-items: start; }
.about__photo { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius-lg); background: var(--color-surface); }
.about__text p { color: var(--color-ink-soft); font-size: var(--text-sm); }
.about__text p + p { margin-top: var(--space-sm); }
.links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-xs); margin-top: var(--space-lg); }
.link-card {
  display: flex; flex-direction: column; gap: var(--space-3xs); height: 100%;
  padding: var(--space-sm); border-radius: var(--radius-md); background: var(--color-surface);
  text-decoration: none; transition: background-color var(--dur-fast) var(--ease-out);
}
.link-card:hover { background: var(--color-line); }
.link-card__title { display: flex; justify-content: space-between; font-weight: 600; font-size: var(--text-sm); }
.link-card__text { font-size: var(--text-xs); color: var(--color-muted); }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: var(--space-xl) 0 0; }
.stats > div { display: flex; flex-direction: column-reverse; justify-content: flex-end; gap: var(--space-3xs); padding: 0 var(--space-sm); border-left: 1px solid var(--color-line); }
.stats > div:first-child { padding-left: 0; border-left: 0; }
.stats dt { font-size: var(--text-xs); color: var(--color-muted); }
.stats dd { margin: 0; font-family: var(--font-display); font-weight: 700; letter-spacing: var(--tracking-display); font-size: var(--text-xl); line-height: 1; font-variant-numeric: tabular-nums; }

/* FAQ */
.faq { margin-top: var(--space-lg); border: 1px solid var(--color-line); border-radius: var(--radius-md); overflow: hidden; }
.faq details + details { border-top: 1px solid var(--color-line); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm); cursor: pointer; list-style: none;
  font-weight: 500; font-size: var(--text-sm);
  transition: background-color var(--dur-fast) var(--ease-out);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none; width: 0.75rem; height: 0.75rem;
  background:
    linear-gradient(var(--color-ink), var(--color-ink)) center / 100% 1.5px no-repeat,
    linear-gradient(var(--color-ink), var(--color-ink)) center / 1.5px 100% no-repeat;
  transition: transform var(--dur-base) var(--ease-out);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { background: var(--color-surface); }
.faq summary:focus-visible { outline-offset: -2px; border-radius: 0; }
.faq details p { padding: 0 var(--space-sm) var(--space-sm); color: var(--color-ink-soft); font-size: var(--text-sm); max-width: 60ch; }

/* Footer */
.footer { margin-top: var(--space-3xl); overflow: hidden; }
.footer__inner {
  max-width: var(--measure-page); margin: 0 auto; padding: var(--space-lg) var(--gutter) 0;
  border-top: 1px solid var(--color-line);
}
.footer__statement { font-family: var(--font-display); font-weight: 700; letter-spacing: var(--tracking-display); font-size: var(--text-lg); line-height: var(--leading-snug); max-width: 26ch; }
.footer__meta { display: flex; flex-wrap: wrap; gap: var(--space-2xs) var(--space-md); margin-top: var(--space-md); font-size: var(--text-xs); color: var(--color-muted); }
.footer__meta a { color: var(--color-ink); text-decoration: none; }
.footer__meta a:hover { text-decoration: underline; text-underline-offset: 0.25em; }
.footer__wordmark {
  margin: var(--space-xl) 0 0; padding: 0 var(--space-sm) var(--space-lg);
  text-align: center; font-family: var(--font-display); font-weight: 700;
  font-size: var(--text-wordmark); letter-spacing: -0.045em; line-height: 1.05;
  white-space: nowrap; color: var(--color-line); user-select: none;
  -webkit-text-stroke: 1px var(--color-line-strong);
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav__links { display: none; }
  .hero__intro { grid-template-columns: minmax(0, 1fr); gap: var(--space-md); padding-top: var(--space-lg); }
  .hero__figure { margin-top: 0; }
  .hero__figure img { aspect-ratio: 4 / 3; object-position: 62% 80%; }
  .cards { grid-template-columns: minmax(0, 1fr); }
  .step { grid-template-columns: minmax(0, 1fr); gap: var(--space-md); }
  .step__demo { min-height: 14rem; }
  .work { grid-template-columns: minmax(0, 1fr); }
  .work__item, .work__item--feature, .work__item--posts { grid-column: auto; grid-template-columns: minmax(0, 1fr); gap: var(--space-md); }
  .about { grid-template-columns: minmax(0, 1fr); }
  .about__photo { max-width: 12rem; }
  .links { grid-template-columns: minmax(0, 1fr); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--space-md); }
  .stats > div:nth-child(3) { padding-left: 0; border-left: 0; }
  .talks thead { display: none; }
  .talks, .talks tbody, .talks tr, .talks td { display: block; }
  .talks tr { padding: var(--space-xs) 0; border-bottom: 1px solid var(--color-line); }
  .talks td { border: 0; padding: 0; }
  .talks td:nth-child(3), .talks td:nth-child(4) { display: inline; font-size: var(--text-xs); color: var(--color-muted); }
  .talks td:nth-child(3)::after { content: " · "; }
}
@media (min-width: 761px) and (max-width: 1040px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .work { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .work__item { grid-column: span 1; }
  .work__item--feature, .work__item--posts { grid-column: span 2; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 120ms !important; }
  .demo-option--picked { background: var(--color-ink); color: var(--color-paper); border-color: var(--color-ink); animation: none; }
  .demo-tip, .demo-done { animation: none; opacity: 1; }
  .demo-bar__fill { animation: none; transform: none; }
}

/* Work: anatomy video feature and half-width items */
.work__item--flip .work__video { order: 2; }
.work__video { margin: 0; border-radius: var(--radius-md); overflow: hidden; background: var(--color-surface-raised); box-shadow: var(--shadow-soft); }
.work__video video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; }
.work__credit { margin-top: var(--space-sm); font-size: var(--text-xs) !important; color: var(--color-muted) !important; }
.work__item--half { grid-column: span 3; }
.work__text .link + .link { margin-left: var(--space-sm); }
@media (max-width: 760px) {
  .work__item--flip .work__video { order: 0; }
  .work__item--half { grid-column: auto; }
}
@media (min-width: 761px) and (max-width: 1040px) {
  .work__item--half { grid-column: span 1; }
}
.work__shot--top { object-position: 0% 0%; }

/* Looping demos and recordings pause while the reader points at them (WCAG 2.2.2). */
.step__demo:hover *, .step__demo:focus-within * { animation-play-state: paused; }
.work__video { position: relative; cursor: pointer; }

/* ---------- Second pass: scroll reveal, hero scroll, reach, filters ---------- */
/* Reveal: elements fade and rise into view, and fade back when they leave (JS toggles .is-in). */
.js [data-reveal] {
  opacity: 0; transform: translateY(var(--space-md));
  transition: opacity var(--dur-reveal) var(--ease-out), transform var(--dur-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* Hero: the image drifts, grows a little and fades as the page scrolls away (JS sets --hero-p from 0 to 1). */
.hero__figure img, .hero__figure video {
  transform: translateY(calc(var(--hero-p, 0) * var(--space-2xl))) scale(calc(1 + var(--hero-p, 0) * 0.06));
  opacity: calc(1 - var(--hero-p, 0) * 0.55);
  transform-origin: 50% 70%;
  will-change: transform, opacity;
}
.hero__figure video {
  display: block; width: 100%; aspect-ratio: 2400 / 1100; object-fit: cover; object-position: 50% 78%;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, var(--color-ink) 34%);
  mask-image: linear-gradient(to bottom, transparent 0%, var(--color-ink) 34%);
}
.hero__intro { transform: translateY(calc(var(--hero-p, 0) * var(--space-lg) * -1)); opacity: calc(1 - var(--hero-p, 0) * 0.35); }

.btn--outline { background: transparent; color: var(--color-ink); border-color: var(--color-line-strong); }
.btn--outline:hover { background: var(--color-surface); border-color: var(--color-ink); }

.talks-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: var(--space-lg) 0 0; }
.talks-summary > div { display: flex; flex-direction: column-reverse; gap: var(--space-3xs); padding: 0 var(--space-sm); border-left: 1px solid var(--color-line); }
.talks-summary > div:first-child { padding-left: 0; border-left: 0; }
.talks-summary dt { font-size: var(--text-xs); color: var(--color-muted); }
.talks-summary dd { margin: 0; font-family: var(--font-display); font-weight: 700; letter-spacing: var(--tracking-display); font-size: var(--text-lg); font-variant-numeric: tabular-nums; }

.filters { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-top: var(--space-lg); }
.filter {
  display: inline-flex; align-items: center; gap: var(--space-3xs); min-height: 2.25rem; padding: 0 var(--space-sm);
  border: 1px solid var(--color-line-strong); border-radius: var(--radius-pill);
  background: var(--color-surface-raised); color: var(--color-ink-soft);
  font: inherit; font-size: var(--text-sm); font-weight: 500; white-space: nowrap; cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.filter:hover { border-color: var(--color-ink); color: var(--color-ink); }
.filter:active { transform: translateY(1px); }
.filter.is-active { background: var(--color-ink); border-color: var(--color-ink); color: var(--color-paper); }
.filter__n { font-size: var(--text-xs); opacity: 0.7; font-variant-numeric: tabular-nums; }
.talks tbody tr { animation: row-in var(--dur-base) var(--ease-out) both; }
@keyframes row-in { from { opacity: 0; } to { opacity: 1; } }
.talks-more { margin-top: var(--space-md); }

.reach { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-xs); margin-top: var(--space-lg); }
.reach__item {
  display: flex; flex-direction: column; justify-content: space-between; gap: var(--space-sm);
  min-height: 7.5rem; padding: var(--space-sm); border-radius: var(--radius-md); background: var(--color-surface);
}
.reach__item--mail { grid-column: span 2; }
.reach__num { font-family: var(--font-display); font-weight: 700; letter-spacing: var(--tracking-display); font-size: var(--text-lg); line-height: 1; font-variant-numeric: tabular-nums; }
.reach__label { font-size: var(--text-xs); color: var(--color-muted); }

@media (max-width: 760px) {
  .reach { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .talks-summary dd { font-size: var(--text-md); }
}
@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .hero__figure img, .hero__figure video, .hero__intro { transform: none; opacity: 1; }
  .talks tbody tr { animation: none; }
}

/* Reach: total + bar chart (single series, one hue, bars grow when the block comes into view) */
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.reach-hero {
  display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: var(--space-xl); align-items: end;
  margin-top: var(--space-lg); padding: var(--space-lg); border-radius: var(--radius-lg);
  background: var(--color-ink); color: var(--color-paper);
}
.reach-hero__total { display: flex; flex-direction: column; gap: var(--space-2xs); }
.reach-hero__num { font-family: var(--font-display); font-weight: 700; letter-spacing: var(--tracking-display); font-size: var(--text-hero); line-height: 1; font-variant-numeric: tabular-nums; }
.reach-hero__label { font-size: var(--text-sm); color: var(--color-chart-text); }
.reach-hero__note { font-size: var(--text-xs); color: var(--color-chart-muted); }
.reach-chart { margin: 0; }
.reach-chart__cap { font-size: var(--text-xs); color: var(--color-chart-muted); margin-bottom: var(--space-xs); }
.bars { display: grid; gap: var(--space-2xs); }
.bar {
  display: grid; grid-template-columns: 1rem minmax(0, 9.5rem) minmax(0, 1fr) 3.25rem; align-items: center; gap: var(--space-xs);
  font-size: var(--text-xs); color: var(--color-chart-text); border-radius: var(--radius-sm); outline-offset: 2px;
}
.bar__icon { width: 1rem; height: 1rem; fill: currentColor; color: var(--color-chart-text); }
.bar__label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar__track { height: 0.625rem; }
.bar__fill {
  display: block; height: 100%; width: calc(var(--v) * 100%);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0; background: var(--color-chart-bar);
  transform: scaleX(0); transform-origin: left;
  transition: transform 1100ms var(--ease-out), background-color var(--dur-fast) var(--ease-out);
  transition-delay: calc(var(--i) * 60ms);
}
.reach-hero.is-in .bar__fill { transform: scaleX(1); }
.bar__value { text-align: right; font-variant-numeric: tabular-nums; color: var(--color-chart-muted); }
.bar:hover .bar__fill, .bar:focus-visible .bar__fill { background: var(--color-chart-bar-hover); }
.bar:hover .bar__value, .bar:focus-visible .bar__value { color: var(--color-paper); }

.reach__icon { width: 1.25rem; height: 1.25rem; fill: currentColor; color: var(--color-ink); }
.reach__item--mail .reach__icon { fill: none; }
.reach { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.reach__item--mail { grid-column: span 2; }

@media (max-width: 760px) {
  .reach-hero { grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); padding: var(--space-md); }
  .bar { grid-template-columns: 1rem minmax(0, 6.5rem) minmax(0, 1fr) 2.75rem; }
}
@media (prefers-reduced-motion: reduce) {
  .bar__fill { transform: none; transition: none; }
}

/* Step 02 demo: a programme plan card */
.demo-plan__row {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-2xs);
  padding: var(--space-2xs); margin-top: var(--space-3xs); border-radius: var(--radius-sm);
  border: 1px solid var(--color-line);
}
.demo-plan__row--focus { animation: pick 4.8s var(--ease-in-out) infinite; }
.demo-tag { padding: 0.125rem var(--space-2xs); border-radius: var(--radius-pill); background: var(--color-surface); color: var(--color-ink-soft); white-space: nowrap; }
.demo-plan__row--focus .demo-tag { background: var(--color-glass-on-sky); color: var(--color-paper); }
.demo-plan__foot { margin-top: var(--space-xs); color: var(--color-muted); }
@media (prefers-reduced-motion: reduce) { .demo-plan__row--focus { animation: none; background: var(--color-ink); color: var(--color-paper); } }

/* Hero option B: text on the left, Francisco on the right, standing on the card's bottom edge */
.hero--portrait { background: linear-gradient(180deg, var(--color-sky-top) 0%, var(--color-sky-mid) 60%, var(--color-sky-image-top) 100%); }
.hero--portrait .hero__intro {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); align-items: end; gap: var(--space-lg);
  max-width: var(--measure-wide); padding-bottom: 0;
}
.hero--portrait .hero__lede { margin-top: var(--space-md); max-width: 34rem; }
.hero--portrait .hero__title { padding-bottom: var(--space-2xl); }
.hero__portrait {
  display: block; width: 100%; height: auto; max-height: 40rem; object-fit: contain; object-position: bottom center;
  align-self: end; pointer-events: none;
  transform: translateY(calc(var(--hero-p, 0) * var(--space-lg)));
}
@media (max-width: 760px) {
  .hero--portrait .hero__intro { grid-template-columns: minmax(0, 1fr); }
  .hero--portrait .hero__title { padding-bottom: 0; }
  .hero__portrait { width: 82%; margin: 0 auto; }
}

@media (max-width: 760px) {
  .reach { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reach__item--mail { grid-column: span 2; }
}