:root {
  --build-bg: #020d18;
  --build-panel: #071a29;
  --build-panel-strong: #0b2232;
  --build-ink: #f4fbff;
  --build-muted: #a7bccb;
  --build-cyan: #43d5e7;
  --build-green: #28d69b;
  --build-gold: #f3c44f;
  --build-line: rgba(94, 219, 236, .24);
  --build-line-strong: rgba(94, 219, 236, .48);
  --build-shadow: rgba(0, 0, 0, .38);
}

html[data-theme="light"] {
  --build-bg: #edf7fb;
  --build-panel: #ffffff;
  --build-panel-strong: #e1f1f7;
  --build-ink: #07131f;
  --build-muted: #4d6170;
  --build-cyan: #087e96;
  --build-green: #087b61;
  --build-gold: #9b6a00;
  --build-line: rgba(15, 109, 133, .22);
  --build-line-strong: rgba(15, 109, 133, .44);
  --build-shadow: rgba(16, 81, 102, .14);
}

* { box-sizing: border-box; }

body.atlas-build-story {
  margin: 0;
  background: var(--build-bg);
  color: var(--build-ink);
  font-family: Inter, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: clip;
}

body.atlas-build-story::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image:
    linear-gradient(var(--build-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--build-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .13;
  pointer-events: none;
}

.build-world {
  width: min(100%, 2320px);
  margin: 0 auto;
  padding: clamp(18px, 3vw, 52px) clamp(16px, 4vw, 80px) calc(132px + env(safe-area-inset-bottom));
}

.build-world h1,
.build-world h2,
.build-world h3,
.build-world p,
.build-world a,
.build-world button,
.build-world dt,
.build-world dd,
.build-world span,
.build-world strong,
.build-world small {
  letter-spacing: 0;
}

.build-world h1,
.build-world h2,
.build-world h3,
.build-world p { margin-top: 0; }

.build-world h1,
.build-world h2,
.build-world h3 { line-height: 1.04; }

.build-kicker {
  margin-bottom: 14px;
  color: var(--build-cyan);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .82rem;
  font-weight: 900;
  line-height: 1.35;
  text-transform: uppercase;
}

.build-hero {
  min-height: min(780px, calc(100svh - 88px));
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
  align-items: center;
  gap: clamp(32px, 7vw, 140px);
  padding: clamp(30px, 6vw, 108px) 0 clamp(48px, 6vw, 100px);
  border-bottom: 1px solid var(--build-line);
}

.build-hero__copy { max-width: 980px; }

.build-hero h1 {
  max-width: 900px;
  margin-bottom: 24px;
  color: var(--build-ink);
  font-size: clamp(3rem, 7vw, 7.8rem);
  font-weight: 950;
}

.build-hero__lead {
  max-width: 780px;
  margin-bottom: 30px;
  color: var(--build-muted);
  font-size: clamp(1.06rem, 1.8vw, 1.5rem);
  line-height: 1.55;
}

.build-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.build-action {
  min-height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border: 1px solid var(--build-line-strong);
  border-radius: 6px;
  text-decoration: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .88rem;
  font-weight: 900;
  line-height: 1.2;
  text-transform: uppercase;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.build-action:active { transform: scale(.98); }
.build-action:focus-visible { outline: 3px solid var(--build-gold); outline-offset: 3px; }
.build-action--primary { background: var(--build-cyan); border-color: var(--build-cyan); color: #03131b; }
.build-action--secondary { background: var(--build-panel); color: var(--build-ink); }

.build-signal-row {
  max-width: 760px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 38px 0 0;
  border-top: 1px solid var(--build-line);
  border-bottom: 1px solid var(--build-line);
}

.build-signal-row > div { padding: 18px 14px 18px 0; }
.build-signal-row > div + div { padding-left: 18px; border-left: 1px solid var(--build-line); }
.build-signal-row dt { color: var(--build-cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: clamp(1.35rem, 3vw, 2.4rem); font-weight: 950; line-height: 1; }
.build-signal-row dd { margin: 7px 0 0; color: var(--build-muted); font-size: .82rem; font-weight: 800; text-transform: uppercase; }

.build-hero__visual {
  min-width: 0;
  display: grid;
  justify-items: center;
  position: relative;
}

.build-hero__visual::before,
.build-hero__visual::after {
  position: absolute;
  border: 1px solid var(--build-line-strong);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.build-hero__visual::before { width: 82%; aspect-ratio: 1; top: 8%; }
.build-hero__visual::after { width: 104%; aspect-ratio: 1; top: -3%; opacity: .35; }

.build-phone {
  width: min(100%, 430px);
  aspect-ratio: .61;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  padding: 13px;
  overflow: hidden;
  background: #020b14;
  border: 2px solid var(--build-line-strong);
  border-radius: 34px;
  box-shadow: 0 42px 90px var(--build-shadow);
  transform: rotate(2deg);
}

.build-phone__bar,
.build-phone__status {
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px;
  color: #b7cad7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .68rem;
  font-weight: 900;
  text-transform: uppercase;
}

.build-phone__bar i { width: 8px; height: 8px; background: var(--build-green); border-radius: 50%; }
.build-phone__bar b { margin-left: auto; color: var(--build-green); }
.build-phone__viewport { min-height: 0; flex: 1; position: relative; overflow: hidden; border: 1px solid rgba(94, 219, 236, .3); border-radius: 18px; }
.build-phone__image { width: 100%; height: 100%; display: block; object-fit: cover; object-position: top center; }
.build-phone__image--day { display: none; }
.build-phone__status { justify-content: space-between; }
.build-phone__status strong { color: var(--build-cyan); }

html[data-theme="light"] .build-phone__image--night { display: none; }
html[data-theme="light"] .build-phone__image--day { display: block; }

.build-hero__caption {
  width: min(92%, 500px);
  position: relative;
  z-index: 2;
  display: grid;
  gap: 4px;
  margin: -40px 0 0;
  padding: 18px 20px;
  background: var(--build-panel);
  border: 1px solid var(--build-line-strong);
  border-radius: 6px;
  box-shadow: 0 22px 48px var(--build-shadow);
}

.build-hero__caption strong { color: var(--build-ink); font-size: 1rem; }
.build-hero__caption span { color: var(--build-muted); font-size: .88rem; }

.build-origin,
.build-proof { padding: clamp(68px, 9vw, 160px) 0; }

.build-section-heading { max-width: 1160px; margin-bottom: clamp(34px, 5vw, 72px); }
.build-section-heading--compact { max-width: 900px; }
.build-section-heading h2,
.build-product h2,
.build-close h2 { margin-bottom: 20px; font-size: clamp(2.2rem, 5.2vw, 5.8rem); font-weight: 950; }
.build-section-heading > p:last-child,
.build-product__copy > p,
.build-close > div > p:last-child { max-width: 880px; color: var(--build-muted); font-size: clamp(1rem, 1.5vw, 1.28rem); }

.build-timeline {
  display: grid;
  grid-template-columns: minmax(260px, .7fr) minmax(0, 1.3fr);
  gap: clamp(20px, 4vw, 70px);
  align-items: stretch;
}

.build-timeline__steps { display: grid; gap: 8px; }
.build-timeline__steps button {
  min-height: 78px;
  display: grid;
  grid-template-columns: 52px 1fr;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: transparent;
  border: 1px solid var(--build-line);
  border-radius: 4px;
  color: var(--build-muted);
  text-align: left;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}
.build-timeline__steps button span { color: var(--build-cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .82rem; font-weight: 900; }
.build-timeline__steps button strong { font-size: 1rem; }
.build-timeline__steps button[aria-selected="true"] { background: var(--build-panel-strong); border-color: var(--build-cyan); color: var(--build-ink); transform: translateX(8px); }
.build-timeline__steps button:focus-visible { outline: 3px solid var(--build-gold); outline-offset: 2px; }

.build-timeline__panel {
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(28px, 5vw, 70px);
  background: var(--build-panel);
  border-left: 4px solid var(--build-cyan);
  box-shadow: 0 28px 70px var(--build-shadow);
}
.build-timeline__panel > p:first-child { margin-bottom: 18px; color: var(--build-cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .8rem; font-weight: 900; text-transform: uppercase; }
.build-timeline__panel h3 { max-width: 900px; margin-bottom: 18px; font-size: clamp(1.7rem, 3.8vw, 3.6rem); }
.build-timeline__panel > p:nth-of-type(2) { max-width: 920px; margin-bottom: 30px; color: var(--build-muted); font-size: clamp(1rem, 1.5vw, 1.22rem); }
.build-timeline__meter { height: 4px; overflow: hidden; background: var(--build-line); }
.build-timeline__meter i { width: 25%; height: 100%; display: block; background: var(--build-cyan); transition: width 320ms ease; }

.build-product {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr);
  gap: clamp(36px, 7vw, 130px);
  align-items: center;
  padding: clamp(60px, 8vw, 140px) 0;
  border-top: 1px solid var(--build-line);
  border-bottom: 1px solid var(--build-line);
}
.build-product__media { min-width: 0; overflow: hidden; border: 1px solid var(--build-line-strong); border-radius: 6px; box-shadow: 0 30px 80px var(--build-shadow); }
.build-product__image { width: 100%; height: auto; display: block; }
.build-product__image--day { display: none; }
html[data-theme="light"] .build-product__image--night { display: none; }
html[data-theme="light"] .build-product__image--day { display: block; }
.build-product__copy > p { margin-bottom: 30px; }

.build-loop { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--build-line); }
.build-loop li { min-height: 88px; display: grid; grid-template-columns: 54px 1fr; align-items: center; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--build-line); }
.build-loop li > span { color: var(--build-cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .8rem; font-weight: 900; }
.build-loop strong { display: block; color: var(--build-ink); font-size: 1rem; }
.build-loop small { display: block; margin-top: 4px; color: var(--build-muted); font-size: .9rem; }

.build-proof__grid { display: grid; grid-template-columns: minmax(300px, .86fr) minmax(0, 1.14fr); gap: clamp(20px, 4vw, 64px); }
.build-proof__feature { min-height: 460px; display: flex; flex-direction: column; justify-content: flex-end; padding: clamp(28px, 5vw, 62px); background: var(--build-panel); border: 1px solid var(--build-line-strong); border-top: 6px solid var(--build-green); color: var(--build-ink); text-decoration: none; }
.build-proof__feature > span { margin-bottom: auto; color: var(--build-green); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .8rem; font-weight: 900; }
.build-proof__feature > strong { margin: 28px 0 18px; color: var(--build-green); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: clamp(3.8rem, 8vw, 8rem); line-height: .9; }
.build-proof__feature p { max-width: 600px; color: var(--build-muted); }
.build-proof__feature b { margin-top: 18px; color: var(--build-cyan); font-size: .9rem; text-transform: uppercase; }
.build-proof__feature:focus-visible { outline: 3px solid var(--build-gold); outline-offset: 3px; }
.build-proof__facts { border-top: 1px solid var(--build-line); }
.build-proof__facts article { min-height: 142px; display: grid; grid-template-columns: 62px 1fr; gap: 18px; align-items: start; padding: 28px 0; border-bottom: 1px solid var(--build-line); }
.build-proof__facts article > span { color: var(--build-gold); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-weight: 900; }
.build-proof__facts strong { font-size: clamp(1.1rem, 1.8vw, 1.38rem); }
.build-proof__facts p { margin: 8px 0 0; color: var(--build-muted); }

.build-close {
  min-height: 420px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 36px;
  align-items: end;
  padding: clamp(60px, 8vw, 130px) 0;
  border-top: 1px solid var(--build-line);
}
.build-close > div:first-child { max-width: 1200px; }
.build-close h2 { margin-bottom: 0; }
.build-close .build-actions { justify-content: flex-end; }

.build-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 30px;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid var(--build-line);
  color: var(--build-muted);
  font-size: .82rem;
}
.build-footer p { margin: 0; }
.build-footer > p:last-child { grid-column: 1 / -1; }
.build-footer strong { color: var(--build-cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.build-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 16px; }
.build-footer a { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding-inline: 6px; color: var(--build-ink); font-weight: 800; text-decoration: none; }
.build-footer a:focus-visible { outline: 2px solid var(--build-gold); outline-offset: 3px; }

.atlas-build-reveal { opacity: 1; transform: none; }
.atlas-build-reveal.is-visible { opacity: 1; transform: none; }

@media (hover: hover) {
  .build-action:hover { transform: translateY(-2px); }
  .build-action--secondary:hover { background: var(--build-panel-strong); border-color: var(--build-cyan); }
  .build-proof__feature:hover { border-color: var(--build-green); }
  .build-footer a:hover { color: var(--build-cyan); }
}

@media (max-width: 900px) {
  .build-world { padding-top: 6px; }
  .build-hero { min-height: auto; grid-template-columns: 1fr; gap: 34px; padding-top: 42px; }
  .build-hero h1 { font-size: clamp(2.9rem, 14vw, 5.6rem); }
  .build-hero__visual { width: min(88vw, 470px); justify-self: center; }
  .build-phone { transform: rotate(1deg); }
  .build-timeline { grid-template-columns: 1fr; }
  .build-timeline__steps { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
  .build-timeline__steps button { min-height: 68px; grid-template-columns: 1fr; gap: 5px; padding: 10px; text-align: center; }
  .build-timeline__steps button[aria-selected="true"] { transform: translateY(-5px); }
  .build-product { grid-template-columns: 1fr; }
  .build-product__media { max-height: 720px; }
  .build-product__image { height: 720px; object-fit: cover; object-position: top center; }
  .build-proof__grid { grid-template-columns: 1fr; }
  .build-proof__feature { min-height: 390px; }
  .build-close { grid-template-columns: 1fr; align-items: start; }
  .build-close .build-actions { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .build-world { padding-inline: 16px; }
  .build-hero { min-height: auto; align-content: start; gap: 14px; padding-top: 22px; padding-bottom: 30px; }
  .build-hero .build-kicker { margin-bottom: 10px; }
  .build-hero h1 { margin-bottom: 14px; font-size: clamp(2.35rem, 11.8vw, 3.35rem); line-height: 1.01; }
  .build-hero__lead { margin-bottom: 16px; font-size: .94rem; line-height: 1.45; }
  .build-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .build-action { width: 100%; }
  .build-hero .build-action { min-height: 50px; padding: 10px 8px; font-size: .68rem; }
  .build-signal-row { margin-top: 16px; }
  .build-signal-row > div { padding: 11px 8px 11px 0; }
  .build-signal-row > div + div { padding-left: 10px; }
  .build-signal-row dt { font-size: 1.12rem; }
  .build-signal-row dd { margin-top: 4px; font-size: .62rem; line-height: 1.25; }
  .build-hero__visual { width: 100%; height: 184px; display: block; overflow: hidden; }
  .build-hero__visual::before { width: 250px; top: -28px; left: calc(50% - 125px); }
  .build-hero__visual::after { display: none; }
  .build-phone { width: 100%; height: 166px; aspect-ratio: auto; padding: 8px; border-radius: 18px; transform: none; }
  .build-phone__bar { min-height: 30px; }
  .build-phone__status { min-height: 26px; }
  .build-phone__bar, .build-phone__status { padding-inline: 7px; font-size: .54rem; }
  .build-hero__caption { width: auto; position: absolute; right: 10px; bottom: 2px; left: 10px; margin: 0; padding: 9px 11px; }
  .build-hero__caption strong { font-size: .78rem; }
  .build-hero__caption span { display: none; }
  .build-origin, .build-proof { padding-block: 74px; }
  .build-section-heading h2, .build-product h2, .build-close h2 { font-size: 2.5rem; }
  .build-timeline__steps button strong { font-size: .72rem; line-height: 1.2; }
  .build-timeline__panel { min-height: 330px; padding: 28px 22px; }
  .build-timeline__panel h3 { font-size: 1.85rem; }
  .build-product { padding-block: 76px; }
  .build-product__media { max-height: 560px; }
  .build-product__image { height: 560px; }
  .build-loop li { grid-template-columns: 42px 1fr; }
  .build-proof__feature { min-height: 360px; padding: 26px 22px; }
  .build-proof__feature > strong { font-size: 4.5rem; }
  .build-proof__facts article { grid-template-columns: 42px 1fr; }
  .build-close { min-height: 0; padding-block: 74px; }
  .build-footer { grid-template-columns: 1fr; }
  .build-footer nav { justify-content: flex-start; }
}

@media (min-width: 1800px) {
  .build-world { padding-inline: 110px; }
  .build-hero { min-height: 900px; }
  .build-phone { width: 520px; }
  .build-hero__lead, .build-section-heading > p:last-child, .build-product__copy > p { font-size: 1.42rem; }
  .build-action { min-height: 64px; padding-inline: 30px; font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .build-action,
  .build-timeline__steps button,
  .build-timeline__meter i,
  .atlas-build-reveal { transition: none !important; }
  .atlas-build-reveal { opacity: 1; transform: none; }
}