/* ---------- Theme tokens ---------- */
:root {
  --bg: #faf9f7;
  --fg: #1a1a1a;
  --fg-muted: #79796f;
  --rule: rgba(0, 0, 0, 0.35);
  --rule-faint: rgba(0, 0, 0, 0.12);
  --card: rgba(0, 0, 0, 0.028);
  --accent: #b4531f;
  --font-display: "Newsreader", "Georgia", serif;
  --font-body: "Inter", -apple-system, "Helvetica Neue", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0f;
    --fg: #f2f2f0;
    --fg-muted: #8c8c94;
    --rule: rgba(255, 255, 255, 0.45);
    --rule-faint: rgba(255, 255, 255, 0.14);
    --card: rgba(255, 255, 255, 0.045);
    --accent: #e08a55;
  }
}

:root[data-theme="light"] {
  --bg: #faf9f7;
  --fg: #1a1a1a;
  --fg-muted: #79796f;
  --rule: rgba(0, 0, 0, 0.35);
  --rule-faint: rgba(0, 0, 0, 0.12);
  --card: rgba(0, 0, 0, 0.028);
  --accent: #b4531f;
}

:root[data-theme="dark"] {
  --bg: #0d0d0f;
  --fg: #f2f2f0;
  --fg-muted: #8c8c94;
  --rule: rgba(255, 255, 255, 0.45);
  --rule-faint: rgba(255, 255, 255, 0.14);
  --card: rgba(255, 255, 255, 0.045);
  --accent: #e08a55;
}

/* ---------- Base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  transition: background 0.35s ease, color 0.35s ease;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 52px 48px 96px;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 0.2s ease, color 0.2s ease;
}

a:hover { text-decoration-color: currentColor; }

::selection { background: var(--accent); color: var(--bg); }

/* ---------- Header ---------- */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 44px;
}

.logotype {
  font-family: var(--font-display);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(40px, 6vw, 60px);
  line-height: 1;
  letter-spacing: -0.02em;
}

.logotype a, .logotype-small a { text-decoration: none; }

/* compact header for inner pages */
.site-header.compact { margin-bottom: 56px; align-items: baseline; }

.logotype-small {
  font-family: var(--font-display);
  font-weight: 800;
  font-style: italic;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  flex-direction: column;
  gap: 28px;
  text-align: right;
  padding-top: 10px;
  flex-shrink: 0;
}

.site-header.compact .site-nav { flex-direction: row; gap: 24px; padding-top: 0; }

.site-nav .nav-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-header.compact .site-nav .nav-group { flex-direction: row; gap: 24px; }

.site-nav a { text-decoration: none; }
.site-nav a:hover { text-decoration: underline; text-underline-offset: 3px; }
.site-nav a[aria-current="page"] { color: var(--fg-muted); }

/* ---------- Home: hero ---------- */
.hero { max-width: 760px; margin-bottom: 64px; }

.hero-lead {
  font-family: var(--font-display);
  font-size: clamp(21px, 2.1vw, 26px);
  line-height: 1.5;
  color: var(--fg);
}

.hero-kicker {
  color: var(--fg-muted);
  margin-bottom: 12px;
  font-size: 15px;
}

.hero h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}

.hero p { max-width: 700px; color: var(--fg); }

/* ---------- Proof strip ---------- */
.proof {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  margin: 20px 0 44px;
  padding: 12px 0;
  border-top: 1px solid var(--rule-faint);
  color: var(--fg-muted);
  font-size: 14.5px;
}

.proof span { white-space: nowrap; }

.proof span + span::before {
  content: "\00B7";
  margin: 0 12px;
  color: var(--rule);
}

/* ---------- Case cards ---------- */
.cases {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 1080px;
}

.section-label {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 20px;
}

.case-card {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 56px;
  align-items: center;
  padding: 26px 0 30px;
  border-top: 1px solid var(--rule-faint);
  text-decoration: none;
}

.case-card .card-thumb {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: center top;
  border-radius: 8px;
  border: 1px solid var(--rule-faint);
  background: var(--card);
}

/* Video thumbs: zoom in slightly to hide edges baked into the recording.
   White background so load/loop gaps flash white (matching the recording), not card-dark. */
.case-card .thumb-video { display: block; overflow: hidden; background: #fff; }

.case-card .thumb-video video {
  display: block;
  width: 108%;
  height: 108%;
  margin: -2% 0 0 -4%;
  object-fit: cover;
  pointer-events: none; /* clicks fall through to the card link */
}

.case-card:last-of-type { border-bottom: 1px solid var(--rule-faint); }

.case-card .num {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  color: var(--accent);
  font-size: 15px;
  display: block;
  margin-bottom: 12px;
}

.case-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.case-card:hover h3 { color: var(--accent); }

.case-card p { max-width: 640px; margin-bottom: 14px; }

/* Tag pills — controlled vocabulary across the site */
.tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tags span {
  font-size: 12.5px;
  color: var(--fg-muted);
  border: 1px solid var(--rule-faint);
  border-radius: 999px;
  padding: 3px 11px;
  white-space: nowrap;
}

.case-card .tags { margin-top: 2px; }
.case-head .tags { margin-top: 20px; }

/* ---------- More link rows (home) ---------- */
.more {
  max-width: 1080px;
  margin-top: 72px;
}

.more .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--rule-faint);
}

.more .row:last-child { border-bottom: 1px solid var(--rule-faint); }

.more .row h3 { font-size: 17px; font-weight: 600; }
.more .row p { color: var(--fg-muted); font-size: 15px; text-align: right; }

/* ---------- Case study pages ---------- */
.case-head { max-width: 720px; margin-bottom: 56px; }

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.case-head h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin-bottom: 16px;
}

.case-head .sub {
  font-size: 19px;
  color: var(--fg-muted);
  line-height: 1.5;
  max-width: 640px;
}

.nda-note {
  font-size: 13.5px;
  color: var(--fg-muted);
  margin-top: 20px;
  font-style: italic;
}

/* TL;DR block */
.tldr {
  max-width: 720px;
  background: var(--card);
  border-left: 3px solid var(--accent);
  padding: 24px 28px;
  margin-bottom: 72px;
  border-radius: 0 8px 8px 0;
}

.tldr dl {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 10px 20px;
  font-size: 15.5px;
}

.tldr dt {
  color: var(--fg-muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-top: 2px;
}

.tldr dd { margin: 0; }

/* Prose */
.prose { max-width: 680px; }

.prose h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 64px 0 20px;
}

.prose .sec-label {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 64px 0 10px;
}

.prose .sec-label + h2 { margin-top: 0; }

.prose h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 36px 0 12px;
}

.prose p { margin-bottom: 18px; }

.prose ul, .prose ol { margin: 0 0 18px 22px; }
.prose li { margin-bottom: 10px; }
.prose li::marker { color: var(--accent); }

.prose strong { font-weight: 600; }

.prose .lead {
  font-size: 19px;
  line-height: 1.55;
}

/* Figures (diagrams, boards) */
.figure {
  margin: 32px 0;
  padding: 12px;
  border: 1px solid var(--rule-faint);
  border-radius: 10px;
  background: var(--card);
  overflow-x: auto;
}

.figure .figcap { padding: 0 8px 4px; }

.figure svg { display: block; min-width: 860px; width: 100%; height: auto; }

.figure img {
  display: block;
  min-width: 860px;
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.figure video {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  background: #000;
  pointer-events: none; /* behaves like a live photo: no click, no scrub, no fullscreen */
}

/* Zoomable figures: cropped preview, click to open full size */
.figure.zoom img {
  min-width: 0;
  max-height: 520px;
  object-fit: cover;
  object-position: top;
  cursor: zoom-in;
}

/* Portrait figures: show the whole image, no crop, centered */
.figure.portrait {
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
}

.figure.portrait img {
  min-width: 0;
  width: auto;
  max-width: 100%;
  max-height: 640px;
  object-fit: contain;
  margin: 0 auto;
}

/* Lightbox overlay */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(12, 11, 10, 0.92);
  overflow: auto;
  padding: 40px 24px;
  cursor: zoom-out;
}

.lightbox img {
  display: block;
  margin: 0 auto;
  max-width: min(1280px, 100%);
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.figcap {
  font-size: 13.5px;
  color: var(--fg-muted);
  margin-top: 14px;
}

/* Pull quote */
.pullquote {
  margin: 40px 0;
  padding-left: 24px;
  border-left: 2px solid var(--accent);
}

.pullquote p {
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.45;
  font-weight: 450;
  margin-bottom: 8px;
}

.pullquote cite {
  font-style: normal;
  font-size: 14px;
  color: var(--fg-muted);
}

/* Outcome list */
.outcomes { margin: 24px 0; }
.outcomes li { margin-bottom: 12px; }

/* Numbered steps */
.steps { counter-reset: step; list-style: none; margin-left: 0 !important; }

.steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 44px;
  margin-bottom: 22px;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  font-size: 19px;
  color: var(--accent);
}

/* Case prev/next nav */
.case-nav {
  max-width: 680px;
  margin-top: 96px;
  padding-top: 28px;
  border-top: 1px solid var(--rule-faint);
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.case-nav a { text-decoration: none; }
.case-nav a:hover { color: var(--accent); }
.case-nav .dir { display: block; font-size: 13px; color: var(--fg-muted); margin-bottom: 6px; }
.case-nav .next { text-align: right; }

/* ---------- Earlier work ---------- */
.earlier-list { max-width: 720px; }

.earlier-list .item {
  padding: 28px 0;
  border-top: 1px solid var(--rule-faint);
}

.earlier-list .item:last-child { border-bottom: 1px solid var(--rule-faint); }

.earlier-list h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.earlier-list h3 .metric { color: var(--accent); font-weight: 600; }
.earlier-list p { color: var(--fg); max-width: 620px; }
.earlier-list .meta { color: var(--fg-muted); font-size: 14px; margin-top: 8px; }

/* ---------- About ---------- */
.principles { list-style: none; margin: 0 0 18px 0 !important; }

.principles li {
  padding: 18px 0;
  border-top: 1px solid var(--rule-faint);
  margin-bottom: 0;
}

.principles li:last-child { border-bottom: 1px solid var(--rule-faint); }

.principles .p-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  display: block;
  margin-bottom: 6px;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 120px;
  padding-top: 28px;
  border-top: 1px solid var(--rule-faint);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  color: var(--fg-muted);
  font-size: 14px;
}

.site-footer .foot-links { display: flex; gap: 20px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* ---------- Theme toggle ---------- */
.theme-toggle {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: none;
  background: var(--fg);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.35s ease;
}

.theme-toggle:hover { transform: scale(1.25); }

/* ---------- Mobile ---------- */
@media (max-width: 720px) {
  main { padding: 28px 22px 80px; }

  .site-header {
    flex-direction: column;
    gap: 28px;
    margin-bottom: 48px;
  }

  .site-header.compact { gap: 16px; margin-bottom: 40px; }

  .site-nav {
    flex-direction: row;
    gap: 20px;
    text-align: left;
    padding-top: 0;
  }

  .site-nav .nav-group { flex-direction: row; gap: 16px; flex-wrap: wrap; }

  .proof { margin: 32px 0 64px; }
  .proof span + span::before { margin: 0 8px; }

  .tldr dl { grid-template-columns: 1fr; gap: 2px; }
  .tldr dt { margin-top: 12px; }
  .tldr dt:first-child { margin-top: 0; }

  .case-card { grid-template-columns: 1fr; gap: 18px; }
  .case-card .card-thumb { height: 190px; object-position: center top; }

  .more .row { flex-direction: column; gap: 4px; }
  .more .row p { text-align: left; }

  .site-footer { flex-direction: column; gap: 12px; }
}