:root {
  color-scheme: dark;
  --ink: #070a0c;
  --ink-soft: #101619;
  --paper: #f4f7f7;
  --muted: #aab5b8;
  --teal: #15aeb5;
  --line: rgb(236 246 246 / 22%);
  --page-pad: clamp(1.25rem, 4vw, 4.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
.skip-link {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: .8rem 1rem;
  transform: translateY(-180%);
  background: var(--paper);
  color: var(--ink);
}
.skip-link:focus { transform: translateY(0); }

.scroll-scene { height: 320vh; background: var(--ink); }
.stage {
  position: sticky;
  top: 0;
  height: 100svh;
  min-height: 38rem;
  overflow: hidden;
  background: #12181b;
  isolation: isolate;
}
.stage::after {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 0;
  background: rgb(0 0 0 / 28%);
  opacity: var(--end-dim, 0);
  pointer-events: none;
}

.scene-video,
.scene-grade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.scene-video {
  z-index: -4;
  object-fit: cover;
  object-position: 50% 50%;
  opacity: 0;
  transform: scale(1.015);
  filter: saturate(.72) contrast(1.08) brightness(.82);
  transition: opacity .55s ease;
}
.is-ready .scene-video,
.no-js .scene-video { opacity: 1; }
.scene-grade {
  z-index: -3;
  background:
    linear-gradient(90deg, rgb(3 7 9 / 80%) 0%, rgb(3 7 9 / 38%) 38%, transparent 66%),
    linear-gradient(180deg, rgb(2 5 7 / 52%) 0%, transparent 26%, transparent 62%, rgb(2 5 7 / 68%) 100%);
}
.scene-grade::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 12rem rgb(0 0 0 / 38%);
}
.site-header {
  position: absolute;
  z-index: 10;
  inset: 0 0 auto;
  height: 5.5rem;
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) auto minmax(12rem, 1fr);
  align-items: center;
  gap: 2rem;
  padding: 0 var(--page-pad);
  border-bottom: 1px solid var(--line);
}
.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: .72rem;
  color: var(--paper);
  text-decoration: none;
  text-transform: uppercase;
}
.brand img { width: 2.65rem; height: 2.65rem; object-fit: contain; }
.brand span { display: grid; line-height: 1; }
.brand strong { font-size: .78rem; letter-spacing: .105em; }
.brand small { margin-top: .33rem; color: #b7c3c5; font-size: .58rem; letter-spacing: .24em; }
.site-header nav { display: flex; align-items: center; gap: clamp(1.35rem, 3vw, 3rem); }
.site-header nav a,
.header-action {
  position: relative;
  color: #eaf0f0;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-decoration: none;
  text-transform: uppercase;
}
.site-header nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -.55rem;
  left: 0;
  height: 1px;
  transform: scaleX(0);
  background: var(--teal);
  transition: transform .22s ease;
}
.site-header nav a:hover::after,
.site-header nav a:focus-visible::after { transform: scaleX(1); }
.header-action {
  justify-self: end;
  border: 1px solid rgb(255 255 255 / 65%);
  padding: .85rem 1.2rem;
  transition: color .2s ease, background .2s ease;
}
.header-action:hover,
.header-action:focus-visible { background: var(--paper); color: var(--ink); }

.hero-copy {
  position: absolute;
  z-index: 4;
  left: var(--page-pad);
  bottom: clamp(4.4rem, 8vh, 6.5rem);
  width: min(47rem, calc(100vw - 2 * var(--page-pad)));
  will-change: opacity, transform;
}
.eyebrow {
  margin: 0 0 1rem;
  color: #c7d3d5;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 2rem;
  height: 1px;
  margin: 0 .75rem .22rem 0;
  background: var(--teal);
}
h1, h2, h3, p { text-wrap: balance; }
h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(3.2rem, min(6.7vw, 9.5vh), 7.25rem);
  font-weight: 650;
  letter-spacing: -.058em;
  line-height: .88;
}
h1 span { display: block; color: #c7d0d1; font-weight: 400; }
.hero-lead {
  max-width: 41rem;
  margin: 1.55rem 0 0;
  color: #d7dfdf;
  font-size: clamp(.98rem, 1.25vw, 1.18rem);
  line-height: 1.55;
}
.hero-lead .keep-line { display: block; }
.keep-line { white-space: nowrap; }
.hero-actions { display: flex; align-items: center; gap: 1.5rem; margin-top: 1.8rem; }
.primary-action {
  padding: .95rem 1.35rem;
  background: var(--paper);
  color: var(--ink);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-decoration: none;
  text-transform: uppercase;
}
.text-action {
  color: var(--paper);
  font-size: .77rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-decoration: none;
  text-transform: uppercase;
}
.text-action span { margin-left: .4rem; color: var(--teal); }
.diagonal-arrow {
  display: inline-flex;
  width: .9em;
  height: .9em;
  vertical-align: -.08em;
}
.diagonal-arrow svg { width: 100%; height: 100%; overflow: visible; }
.diagonal-arrow path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}
.proof-line {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1.7rem;
  margin: 1.7rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--line);
  color: #bec9cb;
  font-size: .68rem;
  font-weight: 650;
  letter-spacing: .1em;
  list-style: none;
  text-transform: uppercase;
}

.drone {
  position: absolute;
  z-index: 2;
  left: 0;
  top: 0;
  margin: 0;
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
}
.drone img { display: block; width: 100%; filter: drop-shadow(0 1.6rem 1.8rem rgb(0 0 0 / 45%)); }
.drone figcaption {
  position: absolute;
  left: 50%;
  bottom: -1rem;
  width: max-content;
  padding-top: .62rem;
  border-top: 1px solid rgb(255 255 255 / 46%);
  color: #f1f5f5;
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.drone figcaption span { margin-right: .55rem; color: var(--teal); }
.drone-camera { width: clamp(10rem, 20vw, 20rem); }
.drone-cleaning { z-index: 4; width: clamp(19rem, 36vw, 36rem); }

.sequence-note {
  position: absolute;
  z-index: 5;
  right: var(--page-pad);
  bottom: 2.05rem;
  left: var(--page-pad);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: rgb(235 243 243 / 62%);
  font-size: .61rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.sequence-note strong { color: #f2f5f5; font-size: .64rem; }
.sequence-note span:last-child { text-align: right; }
.sequence-progress {
  position: absolute;
  z-index: 5;
  right: var(--page-pad);
  bottom: 1.25rem;
  left: var(--page-pad);
  height: 1px;
  background: rgb(255 255 255 / 26%);
}
.sequence-progress i {
  display: block;
  width: 0;
  height: 2px;
  margin-top: -1px;
  background: var(--teal);
  box-shadow: 0 0 1.2rem rgb(21 174 181 / 55%);
}
.loading-note {
  position: absolute;
  z-index: 20;
  inset: 50% auto auto 50%;
  margin: 0;
  transform: translate(-50%, -50%);
  color: #c8d0d0;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  transition: opacity .3s ease;
}
.is-ready .loading-note { opacity: 0; }

.is-static .scroll-scene { height: auto; }
.is-static .stage { position: relative; min-height: 100svh; }
.is-static .drone,
.is-static .sequence-note,
.is-static .sequence-progress { display: none; }
.is-static .hero-copy { opacity: 1 !important; transform: none !important; }

.services-section,
.process-section,
footer {
  padding: clamp(5rem, 10vw, 9rem) var(--page-pad);
}
.services-section {
  position: relative;
  z-index: 6;
  padding-block: clamp(3.5rem, 6vw, 5.5rem);
  background: #9eb7b5;
  color: #101416;
}
.services-section::before {
  content: "";
  position: absolute;
  right: 0;
  bottom: 100%;
  left: 0;
  height: 10rem;
  background: linear-gradient(180deg, rgb(158 183 181 / 0), #9eb7b5);
  pointer-events: none;
}
.services-section .eyebrow { display: flex; align-items: flex-start; color: #3f4c4e; }
.services-section .eyebrow::before { flex: 0 0 2rem; margin-top: .45rem; }
.services-section .eyebrow span { line-height: 1.35; }
.section-intro {
  display: grid;
  grid-template-columns: .72fr 1.8fr 1fr;
  gap: clamp(1.5rem, 4vw, 5rem);
  align-items: start;
}
.section-intro h2,
.process-section h2,
footer h2 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 5.8rem);
  font-weight: 570;
  letter-spacing: -.055em;
  line-height: .98;
}
.section-intro > p:last-child { margin: .25rem 0 0; color: #3d484a; font-size: 1.08rem; line-height: 1.6; }
.service-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid rgb(7 16 18 / 24%);
}
.service-list article { min-height: 15rem; padding: 1.25rem 2rem 1.25rem 0; border-right: 1px solid rgb(7 16 18 / 24%); }
.service-list article + article { padding-left: 2rem; }
.service-list article:last-child { padding-right: 0; border-right: 0; }
.service-list article > span { color: #607075; font-size: .7rem; letter-spacing: .16em; }
.service-list h3 { max-width: 12ch; margin: 2.75rem 0 .75rem; font-size: clamp(1.35rem, 2.2vw, 2.2rem); font-weight: 600; line-height: 1.06; }
.service-list article:first-child h3 { max-width: none; }
.service-list p { max-width: 28rem; margin: 0; color: #3d484a; line-height: 1.6; }
.service-list article:last-child p { max-width: none; text-wrap: wrap; }

.process-section { background: var(--ink-soft); }
.process-section h2 { max-width: none; }
.process-section ol { margin: 4rem 0 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.process-section li {
  display: grid;
  grid-template-columns: minmax(14rem, .9fr) 1.5fr;
  gap: 2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}
.process-section li strong { font-size: 1rem; letter-spacing: .02em; }
.process-section li span { max-width: 42rem; color: var(--muted); line-height: 1.55; }

footer { background: #9eb7b5; color: #071012; }
footer .eyebrow { color: #344b4d; }
footer h2 { max-width: 12ch; }
footer > a {
  display: inline-block;
  margin-top: 3rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid #071012;
  font-size: clamp(1rem, 2vw, 1.55rem);
  text-decoration: none;
}
footer > a span { margin-left: .5rem; color: #087c82; }
footer small { display: block; margin-top: 5rem; color: #344b4d; }

:focus-visible { outline: 2px solid var(--teal); outline-offset: 4px; }

@media (min-width: 821px) and (max-height: 700px) {
  .hero-lead { margin-top: 1rem; line-height: 1.4; }
  .hero-actions { margin-top: 1.2rem; }
  .proof-line { margin-top: 1.1rem; padding-top: .75rem; }
}

@media (max-width: 820px) {
  .scroll-scene { height: 300svh; }
  .stage { position: sticky; height: 100svh; min-height: 0; }
  .scene-video { object-position: 34% center; opacity: 1; }
  .scene-grade { background: linear-gradient(180deg, rgb(2 5 7 / 68%) 0%, rgb(2 5 7 / 22%) 38%, rgb(2 5 7 / 20%) 74%, rgb(2 5 7 / 44%) 86%, rgb(2 5 7 / 76%) 100%); }
  .site-header { height: 4.8rem; grid-template-columns: 1fr auto; padding: 0 1.2rem; }
  .site-header nav { display: none; }
  .brand img { width: 2.3rem; height: 2.3rem; }
  .brand strong { font-size: .68rem; }
  .brand small { font-size: .51rem; }
  .header-action { padding: .7rem .9rem; font-size: .63rem; }
  .hero-copy { left: 1.2rem; right: 1.2rem; bottom: 3.6rem; width: auto; }
  h1 { font-size: clamp(3.2rem, 15vw, 5.4rem); }
  .hero-lead { max-width: 34rem; }
  .proof-line { gap: .5rem 1.1rem; }
  .drone-camera { width: clamp(7rem, 34vw, 9.5rem); }
  .drone-cleaning { width: clamp(12rem, 58vw, 16rem); }
  .drone figcaption { bottom: -.7rem; font-size: .5rem; }
  .drone-cleaning figcaption { right: 16%; left: auto; }
  .sequence-note, .sequence-progress { display: none; }
  .services-section::before {
    height: 7rem;
    background: linear-gradient(180deg, rgb(158 183 181 / 0) 0%, rgb(158 183 181 / 10%) 30%, rgb(158 183 181 / 42%) 68%, #9eb7b5 100%);
  }
  .is-static .services-section::before { height: 2.5rem; }
  .services-section .eyebrow br { display: none; }
  .section-intro { grid-template-columns: 1fr; }
  .section-intro h2 { max-width: 13ch; }
  .service-list { grid-template-columns: 1fr; }
  .service-list article,
  .service-list article + article { min-height: 0; padding: 1.25rem 0 1.5rem; border-right: 0; border-bottom: 1px solid #aeb7b8; }
  .service-list h3 { margin-top: 1.75rem; }
  .process-section h2 { font-size: clamp(2.15rem, 9.6vw, 2.4rem); }
  .process-section li { grid-template-columns: 1fr; gap: .6rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scroll-scene { height: auto; }
  .stage { position: relative; min-height: 100svh; }
  .drone, .sequence-note, .sequence-progress { display: none; }
  .hero-copy { opacity: 1 !important; transform: none !important; }
}