:root {
  color-scheme: light;
  --ink: #182026;
  --muted: #5a6670;
  --paper: #f6f3ec;
  --panel: #ffffff;
  --line: #d9d2c6;
  --accent: #1c6f78;
  --accent-dark: #134c52;
  --brick: #c9472f;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}

.hero {
  min-height: 72vh;
  display: flex;
  align-items: flex-end;
  background: linear-gradient(180deg, rgba(18, 25, 30, .16), rgba(18, 25, 30, .76)), url('/assets/photos/lego-plane-01.jpg') center / cover;
}
.hero__inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 56px;
  color: white;
}
.eyebrow {
  margin: 0 0 12px;
  font-size: 14px;
  letter-spacing: 0;
  text-transform: uppercase;
  opacity: .85;
}
h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(40px, 7vw, 82px);
  line-height: .98;
  letter-spacing: 0;
}
.lead {
  max-width: 760px;
  margin: 24px 0 0;
  font-size: 19px;
}
main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}
section { padding: 56px 0; }
h2 {
  margin: 0 0 18px;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 0;
}
.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}
.intro p { max-width: 760px; }
aside {
  border-left: 4px solid var(--accent);
  padding: 8px 0 8px 22px;
  background: transparent;
}
dl, dd { margin: 0; }
dt { color: var(--muted); font-size: 14px; }
dd { margin: 3px 0 18px; font-weight: 700; }
.workflow { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.steps article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}
.steps span { color: var(--brick); font-weight: 800; }
h3 { margin: 10px 0 8px; font-size: 20px; }
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.tile {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 8px;
  background: #ded8cd;
  border: 1px solid var(--line);
}
.tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .18s ease;
}
.tile:hover img { transform: scale(1.035); }
footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px 0 46px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
@media (max-width: 820px) {
  .hero { min-height: 66vh; }
  .lead { font-size: 17px; }
  .intro, .steps, .grid { grid-template-columns: 1fr; }
  section { padding: 40px 0; }
}

.dataset {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: center;
  border-top: 1px solid var(--line);
}
.dataset p { max-width: 760px; }
.download {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 138px;
  padding: 22px;
  border-radius: 8px;
  color: white;
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  text-decoration: none;
  border: 1px solid rgba(0, 0, 0, .08);
}
.download span {
  font-size: 18px;
  font-weight: 750;
}
.download strong {
  margin-top: 10px;
  font-size: 15px;
  font-weight: 650;
  opacity: .86;
}
.download:hover { filter: brightness(1.04); }
@media (max-width: 820px) {
  .dataset { grid-template-columns: 1fr; }
}

.video-note {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 30px;
  align-items: center;
  border-top: 1px solid var(--line);
}
.video-copy p { color: var(--muted); }
.video-frame {
  margin: 0;
}
.video-frame video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #161b20;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.video-frame figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}
.video-frame a { color: var(--accent-dark); }
@media (max-width: 820px) {
  .video-note { grid-template-columns: 1fr; }
}