/* MatDrone STORY — intro (air, sticky climb), services & industries (ground).
   Prefixes: intro-, svc-, ind-. Tokens only. Mobile-first, breakpoints 600 / 900 / 1200.
   Nothing is hidden unless a JS-set class is present (story.js adds .intro--no-sticky / .intro-climb--on). */

/* ============================ INTRO (air, climb) ============================ */
.intro { padding-block: 0; }

.intro-track { position: relative; min-height: 220vh; }

.intro-stage {
  position: sticky;
  top: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-block: calc(var(--nav-h) + var(--section-y) * 0.4) var(--section-y);
}

/* If the stage content is taller than the viewport (small screens / big text),
   story.js drops sticky so the whole statement stays reachable. */
.intro--no-sticky .intro-track { min-height: 0; }
.intro--no-sticky .intro-stage { position: relative; min-height: 0; }

.intro-stage__in {
  display: grid;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: end;
}

.intro-copy { max-width: 62ch; }
.intro-copy .label { margin-bottom: clamp(1.25rem, 3vw, 2.25rem); display: block; }

.intro-statement {
  font-size: clamp(1.6rem, 3.4vw, 3.1rem);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--fg);
  text-wrap: pretty;
  max-width: 24ch;
}

/* Figure strip: three key numbers */
.intro-figs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  border-top: 1px solid var(--line);
  padding-top: clamp(1.25rem, 2.5vw, 2rem);
}
.intro-fig { display: grid; gap: 0.5rem; align-content: start; }
.intro-fig .label { color: var(--fg-3); }
.intro-fig__v {
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 700;
  font-size: clamp(1.75rem, 3.6vw, 3.25rem);
  line-height: 1;
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}
.intro-fig__u {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--fg-3);
}

/* Altitude ladder (decorative, aria-hidden). Shown by story.js only when the 3D
   world is rendering on a non-touch device. The mark's top% is driven by ALT. */
.intro-climb {
  position: absolute;
  right: clamp(1rem, 3vw, 2.75rem);
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  z-index: 2;
}
.intro-climb[hidden] { display: none; }
.intro-climb__cap {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-3);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}
.intro-climb__scale {
  position: relative;
  width: 1px;
  height: clamp(120px, 22vh, 200px);
  background: repeating-linear-gradient(to bottom, var(--line-2) 0 1px, transparent 1px 18px);
}
.intro-climb__scale::before,
.intro-climb__scale::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 7px;
  height: 1px;
  background: var(--line-2);
  transform: translateX(-50%);
}
.intro-climb__scale::before { top: 0; }
.intro-climb__scale::after { bottom: 0; }
.intro-climb__mark {
  position: absolute;
  left: 50%;
  top: 100%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  white-space: nowrap;
}
.intro-climb__mark::before {
  content: "";
  width: 11px;
  height: 1px;
  background: var(--accent);
  flex: none;
}
.intro-climb__read {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 900px) {
  .intro-stage__in { grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); }
  .intro-copy { grid-column: 1 / span 8; }
  .intro-figs {
    grid-column: 9 / span 4;
    grid-template-columns: 1fr;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: var(--gap);
    align-content: end;
    gap: clamp(1.5rem, 3vw, 2.75rem);
  }
}

/* ============================ SERVICES (ground) ============================ */
.svc-grid { row-gap: 0; }

.svc-card {
  grid-column: span 12;
  position: relative;
  padding: clamp(1.75rem, 4vw, 3rem) clamp(0.25rem, 1vw, 1rem) clamp(1.75rem, 4vw, 3rem) 0;
  border-top: 1px solid var(--line);
  transition: border-color var(--t) var(--ease-out);
}
.svc-card:last-child { border-bottom: 1px solid var(--line); }

.svc-card__idx { font-size: var(--fs-label); letter-spacing: 0.14em; margin-bottom: 1.1rem; }
.svc-card__name { margin-bottom: 0.85rem; }
.svc-card__desc { margin-bottom: 1.75rem; font-size: var(--fs-small); }

.svc-card__get { margin-bottom: 0.75rem; color: var(--fg-3); }

.svc-list { border-top: 1px solid var(--line); }
.svc-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.25rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-small);
  color: var(--fg-2);
}
.svc-fmt { font-size: 0.75rem; letter-spacing: 0.04em; color: var(--fg-3); flex: none; }

.svc-card__cta {
  margin-top: 1.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 500;
  font-size: 0.9375rem;
}
.svc-card__ic { transition: transform var(--t) var(--ease-out); }

@media (hover: hover) {
  .svc-card:hover { border-top-color: var(--line-2); }
  .svc-card:hover .svc-card__cta { color: var(--accent); }
  .svc-card:hover .svc-card__ic { transform: translate(3px, -3px); }
}

@media (min-width: 900px) {
  .svc-card:nth-child(1) { grid-column: span 7; }
  .svc-card:nth-child(2) { grid-column: span 5; }
  .svc-card:nth-child(3) { grid-column: span 5; }
  .svc-card:nth-child(4) { grid-column: span 7; }
  .svc-card:nth-child(odd)  { padding-right: clamp(1.5rem, 3vw, 3rem); }
  .svc-card:nth-child(even) { padding-left: clamp(1.5rem, 3vw, 3rem); border-left: 1px solid var(--line); }
  .svc-card:nth-child(3) { border-left: 0; padding-left: clamp(0.25rem, 1vw, 1rem); padding-right: clamp(1.5rem, 3vw, 3rem); }
  .svc-card:nth-child(4) { border-left: 1px solid var(--line); padding-left: clamp(1.5rem, 3vw, 3rem); }
}

/* ============================ INDUSTRIES (ground) ============================ */
.ind-grid { row-gap: 0; }

.ind-item {
  grid-column: span 12;
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.5rem) 0;
  border-top: 1px solid var(--line);
  transition: border-color var(--t) var(--ease-out);
}
.ind-item:last-child { border-bottom: 1px solid var(--line); }

.ind-item__idx { font-size: var(--fs-label); letter-spacing: 0.14em; margin-bottom: 0.9rem; }
.ind-item__name { margin-bottom: 0.6rem; transition: color var(--t) var(--ease-out); }
.ind-item__use { font-size: var(--fs-small); max-width: 38ch; }

@media (hover: hover) {
  .ind-item:hover .ind-item__name { color: var(--accent); }
}

@media (min-width: 600px) {
  .ind-item { grid-column: span 6; padding-right: var(--gap); }
  .ind-item:nth-child(even) { border-left: 1px solid var(--line); padding-left: var(--gap); padding-right: 0; }
}
@media (min-width: 900px) {
  .ind-item { grid-column: span 4; padding-right: var(--gap); }
  .ind-item:nth-child(even) { border-left: 0; padding-left: 0; }
  .ind-item:nth-child(3n+2),
  .ind-item:nth-child(3n+3) { border-left: 1px solid var(--line); padding-left: var(--gap); }
  .ind-item:nth-child(3n+2) { padding-right: var(--gap); }
}

/* Marquee divider (MOTION wraps children in .motion-track and loops) */
.ind-marquee {
  margin-top: clamp(3rem, 7vw, 6rem);
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-3);
  gap: 2.5rem;
}
.ind-marquee > span { flex: none; }
.ind-marquee__sep { color: var(--accent); }