:root {
  --bg: #f6f7f8;
  --bg-soft: #fbfbfc;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --ink: #111315;
  --ink-soft: #3f454d;
  --muted: #737a84;
  --line: rgba(25, 31, 38, 0.1);
  --line-strong: rgba(25, 31, 38, 0.16);
  --blue: #3d7fd4;
  --blue-soft: #e5f0ff;
  --amber: #c99754;
  --clay: #a97663;
  --green: #49b46a;
  --shadow-soft: 0 20px 60px rgba(34, 42, 54, 0.1);
  --shadow-card: 0 16px 36px rgba(34, 42, 54, 0.09);
  --radius-window: 30px;
  --radius-card: 22px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.95), rgba(246, 247, 248, 0.8) 36%, rgba(236, 240, 245, 0.7) 72%),
    linear-gradient(180deg, #ffffff 0%, #f5f6f8 42%, #ffffff 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(61, 127, 212, 0.34);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 18px;
  top: 12px;
  z-index: 20;
  transform: translateY(-140%);
  border-radius: 999px;
  background: #111315;
  color: #fff;
  padding: 10px 14px;
}

.skip-link:focus {
  transform: translateY(0);
}

.alpha-shell {
  width: min(1720px, calc(100% - 34px));
  margin: 12px auto 24px;
  border: 1px solid rgba(255, 255, 255, 0.84);
  border-radius: 34px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.7)),
    radial-gradient(circle at 80% 8%, rgba(169, 205, 255, 0.3), transparent 34%),
    radial-gradient(circle at 14% 35%, rgba(219, 229, 239, 0.58), transparent 46%);
  box-shadow: 0 30px 90px rgba(33, 39, 48, 0.1);
  overflow: hidden;
}

.top-orb {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(210px, 1fr) auto minmax(210px, 1fr);
  align-items: center;
  min-height: 92px;
  padding: 0 38px;
  border-bottom: 1px solid rgba(28, 34, 42, 0.08);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(24px) saturate(150%);
}

.brand-lockup,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  width: fit-content;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: inline-block;
  background: url("./virtura-mark.png") center / contain no-repeat;
  box-shadow: 0 10px 22px rgba(17, 17, 17, 0.08);
}

.brand-name {
  display: grid;
  gap: 1px;
  font-size: 14px;
  line-height: 1.1;
}

.brand-name strong {
  font-size: 19px;
  font-weight: 700;
}

.brand-name span {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 600;
}

.main-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
  color: var(--ink-soft);
  font-size: 14px;
}

.main-tabs a {
  position: relative;
  padding: 32px 0 29px;
}

.main-tabs a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 22px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 220ms var(--ease);
}

.main-tabs a:hover,
.main-tabs a.is-active {
  color: var(--ink);
}

.main-tabs a:hover::after,
.main-tabs a.is-active::after {
  transform: scaleX(1);
}

.nav-tools {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.tool-button {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(18, 24, 32, 0.08);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 10px 24px rgba(32, 42, 55, 0.08);
  color: #22272d;
  font-size: 20px;
  transition: transform 180ms var(--ease), background 180ms var(--ease);
}

.tool-button:hover {
  transform: translateY(-2px);
  background: #fff;
}

.tool-button--avatar {
  font-size: 15px;
  font-weight: 700;
}

main {
  padding: 34px;
}

.hero-window {
  position: relative;
  min-height: 620px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(390px, 0.9fr) minmax(260px, 0.45fr);
  align-items: center;
  gap: 38px;
  padding: 68px 74px;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: var(--radius-window);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.72) 40%, rgba(255, 255, 255, 0.44)),
    radial-gradient(ellipse at 66% 20%, rgba(222, 231, 242, 0.86) 0 26%, transparent 57%),
    radial-gradient(ellipse at 82% 82%, rgba(215, 230, 244, 0.72) 0 24%, transparent 58%),
    linear-gradient(135deg, #fff 0%, #f4f7f9 42%, #edf2f6 100%);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.hero-window::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 82% 2%, transparent 0 44%, rgba(255, 255, 255, 0.72) 45% 48%, transparent 49%),
    linear-gradient(110deg, rgba(255, 255, 255, 0.9) 0 12%, transparent 38%),
    radial-gradient(circle at 74% 42%, rgba(61, 127, 212, 0.12), transparent 20%);
  pointer-events: none;
}

.hero-copy,
.hero-spatial-map,
.arrival-card {
  position: relative;
  z-index: 1;
}

.section-kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.hero-copy h1 {
  margin: 0;
  font-size: 76px;
  line-height: 0.98;
  font-weight: 300;
}

.hero-lede {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 21px;
  line-height: 1.58;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
}

.primary-action {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: #111315;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 12px 26px rgba(17, 19, 21, 0.22);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.primary-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(17, 19, 21, 0.28);
}

.round-action {
  display: grid;
  place-items: center;
  min-width: 48px;
  height: 48px;
  padding: 0 14px;
  border: 1px solid rgba(18, 24, 32, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 10px 24px rgba(32, 42, 55, 0.08);
  color: var(--ink-soft);
  font-weight: 700;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 28px;
  color: var(--muted);
  font-size: 13px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(73, 180, 106, 0.12);
}

.hero-spatial-map {
  width: 430px;
  max-width: 100%;
  aspect-ratio: 1;
  justify-self: center;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.9) 0 4%, transparent 5%),
    repeating-radial-gradient(circle, rgba(66, 84, 105, 0.15) 0 1px, transparent 1px 44px),
    linear-gradient(90deg, transparent 49.8%, rgba(75, 91, 112, 0.14) 50%, transparent 50.2%),
    linear-gradient(0deg, transparent 49.8%, rgba(75, 91, 112, 0.14) 50%, transparent 50.2%);
  opacity: 0.9;
}

.hero-spatial-map::before,
.hero-spatial-map::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.hero-spatial-map::before {
  inset: 34%;
  background: radial-gradient(circle, rgba(255, 255, 255, 1), rgba(214, 230, 250, 0.8));
  border: 1px solid rgba(82, 124, 174, 0.18);
  box-shadow: 0 0 42px rgba(61, 127, 212, 0.24);
}

.hero-spatial-map::after {
  inset: 47.5%;
  background: #fff;
  box-shadow: 0 0 22px rgba(61, 127, 212, 0.35);
}

.map-label {
  position: absolute;
  color: rgba(44, 52, 62, 0.74);
  font-size: 13px;
  font-weight: 700;
}

.map-label--research {
  top: 13%;
  left: 45%;
}

.map-label--creation {
  right: 8%;
  top: 48%;
}

.map-label--archive {
  left: 44%;
  bottom: 12%;
}

.map-label--exchange {
  left: 6%;
  top: 48%;
}

.arrival-card {
  align-self: center;
  padding: 28px;
  border: 1px solid rgba(18, 24, 32, 0.08);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(20px) saturate(150%);
}

.arrival-card h2 {
  margin: 0 0 18px;
  font-size: 18px;
}

.arrival-card ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.arrival-card li {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  min-height: 46px;
  border-bottom: 1px solid rgba(20, 28, 36, 0.08);
}

.arrival-card li:last-child {
  border-bottom: 0;
}

.arrival-card span {
  font-weight: 700;
}

.arrival-card small {
  color: var(--muted);
}

.panel-section,
.happening-window,
.signal-console,
.dual-window,
.paths-window,
.motion-window {
  margin-top: 28px;
}

.panel-section,
.happening-window,
.signal-console,
.paths-window,
.motion-window {
  padding: 28px;
  border: 1px solid rgba(18, 24, 32, 0.08);
  border-radius: var(--radius-window);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px) saturate(140%);
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.section-heading h2,
.info-window h2,
.relationship-window h2,
.motion-window h2 {
  margin: 0;
  max-width: 760px;
  font-size: 30px;
  line-height: 1.2;
  font-weight: 500;
}

.section-heading--compact h2 {
  font-size: 22px;
}

.quiet-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.ports-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.port-card {
  position: relative;
  min-height: 358px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  padding: 20px;
  border: 1px solid rgba(18, 24, 32, 0.08);
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 12px 28px rgba(32, 42, 55, 0.08);
  transition: transform 260ms var(--ease), box-shadow 260ms var(--ease), border-color 260ms var(--ease);
}

.port-card:hover,
.port-card:focus-visible {
  transform: translateY(-6px);
  border-color: rgba(61, 127, 212, 0.26);
  box-shadow: 0 28px 54px rgba(32, 42, 55, 0.15);
}

.port-card.is-dimmed {
  opacity: 0.72;
}

.port-card h3 {
  position: relative;
  z-index: 1;
  margin: 18px 48px 8px 0;
  font-size: 20px;
  line-height: 1.18;
}

.port-card p {
  position: relative;
  z-index: 1;
  min-height: 48px;
  margin: 0;
  color: var(--ink-soft);
}

.port-visual {
  position: absolute;
  inset: 0 0 112px;
  overflow: hidden;
  border-bottom: 1px solid rgba(18, 24, 32, 0.06);
  background-position: center;
  background-size: cover;
}

.port-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 44%, rgba(255, 255, 255, 0.78));
  pointer-events: none;
}

.app-badge,
.card-arrow {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 26px rgba(30, 38, 48, 0.12);
}

.app-badge {
  left: 18px;
  bottom: 112px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(18, 24, 32, 0.06);
  color: var(--ink);
  font-weight: 700;
}

.card-arrow {
  right: 18px;
  bottom: 18px;
  width: 40px;
  height: 40px;
  color: var(--ink);
  font-size: 20px;
}

.tea-room,
.white-gallery,
.radar-plate,
.network-web,
.balloon-form {
  position: absolute;
  inset: 0;
  display: block;
}

.port-visual > span {
  display: none;
}

.tea-room {
  background:
    linear-gradient(180deg, transparent 0 52%, rgba(255, 255, 255, 0.82) 100%),
    radial-gradient(circle at 28% 24%, rgba(247, 225, 178, 0.74), transparent 22%),
    radial-gradient(circle at 74% 22%, rgba(196, 214, 196, 0.45), transparent 28%),
    linear-gradient(90deg, rgba(108, 130, 112, 0.22) 0 1px, transparent 1px 10px),
    linear-gradient(180deg, #edf3ee, #f9faf8);
}

.tea-room::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 24px;
  height: 122px;
  border-radius: 22px 22px 8px 8px;
  background:
    linear-gradient(90deg, rgba(28, 34, 30, 0.48) 0 2px, transparent 2px 24%, rgba(28, 34, 30, 0.36) 24% 25%, transparent 25% 49%, rgba(28, 34, 30, 0.34) 49% 50%, transparent 50% 74%, rgba(28, 34, 30, 0.36) 74% 75%, transparent 75%),
    linear-gradient(180deg, rgba(255, 244, 220, 0.72), rgba(255, 255, 255, 0.18));
  border: 1px solid rgba(76, 89, 74, 0.2);
  box-shadow: 0 20px 52px rgba(88, 103, 91, 0.18);
  backdrop-filter: blur(4px);
}

.tea-room::after {
  content: "";
  position: absolute;
  left: 21%;
  right: 21%;
  bottom: 16px;
  height: 34px;
  border-radius: 50%;
  background: rgba(91, 105, 92, 0.12);
  box-shadow:
    18px -60px 0 -11px rgba(69, 98, 75, 0.38),
    68px -44px 0 -14px rgba(84, 121, 91, 0.34),
    -54px -36px 0 -13px rgba(70, 104, 79, 0.28);
}

.balloon-form {
  background:
    radial-gradient(circle at 50% 82%, rgba(255, 255, 255, 0.8), transparent 34%),
    linear-gradient(180deg, #eef6ff, #ffffff 62%, #f0f4f8);
}

.balloon-form::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 22px;
  width: 132px;
  height: 160px;
  transform: translateX(-50%);
  border-radius: 58% 58% 54% 54%;
  background:
    linear-gradient(120deg, transparent 0 18%, rgba(255, 255, 255, 0.32) 18% 27%, transparent 27% 44%, rgba(255, 255, 255, 0.28) 44% 56%, transparent 56%),
    radial-gradient(circle at 62% 20%, rgba(255, 255, 255, 0.74), transparent 20%),
    conic-gradient(from 170deg, #97c9f0, #536fba, #1d2737, #8666d9, #ee92ae, #97c9f0);
  clip-path: polygon(50% 0%, 81% 8%, 100% 34%, 87% 70%, 58% 100%, 42% 100%, 13% 70%, 0% 34%, 19% 8%);
  box-shadow: 0 24px 60px rgba(65, 94, 146, 0.28);
}

.balloon-form::after {
  content: "";
  position: absolute;
  left: calc(50% - 15px);
  top: 180px;
  width: 30px;
  height: 28px;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(65, 94, 146, 0.16);
}

.white-gallery {
  background:
    radial-gradient(circle at 50% 32%, rgba(255, 255, 255, 1) 0 17%, transparent 18%),
    radial-gradient(ellipse at 56% 10%, rgba(208, 218, 229, 0.7), transparent 32%),
    linear-gradient(90deg, transparent 0 18%, rgba(208, 218, 229, 0.24) 18% 19%, transparent 19% 37%, rgba(208, 218, 229, 0.2) 37% 38%, transparent 38%),
    linear-gradient(180deg, #fefefe, #edf1f5);
}

.white-gallery::before {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  bottom: 22px;
  height: 34px;
  border-radius: 50%;
  background: rgba(185, 197, 209, 0.18);
  filter: blur(2px);
}

.radar-plate {
  background:
    radial-gradient(circle, rgba(97, 156, 225, 0.9) 0 2px, transparent 3px),
    repeating-radial-gradient(circle, rgba(136, 174, 220, 0.24) 0 1px, transparent 1px 21px),
    linear-gradient(90deg, transparent 49.5%, rgba(136, 174, 220, 0.2) 50%, transparent 50.5%),
    linear-gradient(0deg, transparent 49.5%, rgba(136, 174, 220, 0.2) 50%, transparent 50.5%),
    radial-gradient(circle, #253042, #111826);
}

.radar-plate::before {
  content: "";
  position: absolute;
  inset: 38px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(92, 154, 231, 0.88), transparent 11%);
  box-shadow: 0 0 48px rgba(66, 125, 205, 0.5);
}

.network-web {
  background:
    radial-gradient(circle at 30% 36%, #2f71b9 0 3px, transparent 4px),
    radial-gradient(circle at 58% 18%, #76b1e8 0 3px, transparent 4px),
    radial-gradient(circle at 72% 56%, #294f84 0 4px, transparent 5px),
    radial-gradient(circle at 42% 72%, #67a8dd 0 3px, transparent 4px),
    linear-gradient(24deg, transparent 0 22%, rgba(70, 140, 205, 0.18) 22% 23%, transparent 23%),
    linear-gradient(152deg, transparent 0 38%, rgba(70, 140, 205, 0.16) 38% 39%, transparent 39%),
    linear-gradient(70deg, transparent 0 46%, rgba(70, 140, 205, 0.16) 46% 47%, transparent 47%),
    radial-gradient(circle at 50% 45%, rgba(92, 156, 225, 0.12), transparent 42%),
    #f5f9ff;
}

.network-web::after {
  content: "";
  position: absolute;
  inset: 18px;
  background-image: radial-gradient(circle, rgba(61, 127, 212, 0.28) 0 1px, transparent 2px);
  background-size: 32px 26px;
  opacity: 0.8;
}

.port-card--tea .port-visual {
  background-image: url("./visuals/station-tea-house.jpg");
}

.port-card--balloon .port-visual {
  background-image: url("./visuals/station-balloon.jpg");
  background-position: center 42%;
}

.port-card--mova .port-visual {
  background-image: url("./visuals/station-mova.jpg");
}

.port-card--lab .port-visual {
  background-image: url("./visuals/station-research-lab.jpg");
}

.port-card--network .port-visual {
  background-image: url("./visuals/station-knowledge-network.jpg");
}

.event-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.event-card,
.signal-pill,
.path-card,
.motion-steps article,
.mini-row a {
  border: 1px solid rgba(18, 24, 32, 0.08);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 10px 24px rgba(32, 42, 55, 0.06);
}

.event-card {
  min-height: 128px;
  display: grid;
  grid-template-columns: 92px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 12px;
  border-radius: 20px;
}

.event-thumb,
.signal-avatar {
  display: block;
  border-radius: 16px;
  background: var(--blue-soft);
  background-position: center;
  background-size: cover;
}

.event-thumb {
  width: 92px;
  height: 92px;
}

.event-card p,
.event-card h3,
.event-card span {
  margin: 0;
}

.event-card p {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.event-card h3 {
  margin: 6px 0;
  font-size: 16px;
}

.event-card span {
  color: var(--muted);
  font-size: 13px;
}

.event-card strong {
  align-self: start;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(73, 180, 106, 0.1);
  color: #289251;
  font-size: 11px;
}

.event-thumb--tea,
.signal-avatar--tea {
  background-image: url("./visuals/station-tea-house.jpg");
}

.event-thumb--mova,
.signal-avatar--mova {
  background-image: url("./visuals/station-mova.jpg");
}

.event-thumb--lab,
.signal-avatar--lab {
  background-image: url("./visuals/station-research-lab.jpg");
}

.event-thumb--network,
.signal-avatar--network {
  background-image: url("./visuals/station-knowledge-network.jpg");
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.signal-pill {
  min-height: 88px;
  display: grid;
  grid-template-columns: 56px 1fr 88px;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 18px;
}

.signal-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
}

.signal-pill b {
  display: block;
  font-size: 14px;
}

.signal-pill small {
  color: var(--muted);
}

.spark {
  height: 28px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, transparent, rgba(115, 122, 132, 0.18), transparent),
    repeating-linear-gradient(90deg, transparent 0 6px, rgba(115, 122, 132, 0.36) 6px 7px, transparent 7px 13px);
  opacity: 0.7;
}

.spark--green {
  background:
    linear-gradient(90deg, transparent, rgba(73, 180, 106, 0.18), transparent),
    repeating-linear-gradient(90deg, transparent 0 6px, rgba(73, 180, 106, 0.45) 6px 7px, transparent 7px 13px);
}

.spark--blue {
  background:
    linear-gradient(90deg, transparent, rgba(61, 127, 212, 0.18), transparent),
    repeating-linear-gradient(90deg, transparent 0 6px, rgba(61, 127, 212, 0.45) 6px 7px, transparent 7px 13px);
}

.spark--dark {
  background:
    linear-gradient(90deg, transparent, rgba(30, 42, 60, 0.18), transparent),
    repeating-linear-gradient(90deg, transparent 0 6px, rgba(30, 42, 60, 0.45) 6px 7px, transparent 7px 13px);
}

.dual-window {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
}

.info-window,
.relationship-window {
  min-height: 356px;
  padding: 30px;
  border: 1px solid rgba(18, 24, 32, 0.08);
  border-radius: var(--radius-window);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.info-window p:not(.section-kicker) {
  max-width: 680px;
  color: var(--ink-soft);
  font-size: 17px;
}

.mini-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.mini-row a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 64px;
  padding: 0 18px;
  border-radius: 16px;
  color: var(--ink-soft);
  font-weight: 700;
}

.relationship-window {
  position: relative;
}

.relationship-map {
  position: relative;
  width: min(330px, 100%);
  aspect-ratio: 1;
  margin: 34px auto 0;
  border-radius: 50%;
  background:
    repeating-radial-gradient(circle, rgba(98, 119, 142, 0.16) 0 1px, transparent 1px 46px),
    linear-gradient(90deg, transparent 49.8%, rgba(98, 119, 142, 0.14) 50%, transparent 50.2%),
    linear-gradient(0deg, transparent 49.8%, rgba(98, 119, 142, 0.14) 50%, transparent 50.2%);
}

.node {
  position: absolute;
  display: grid;
  place-items: center;
  min-width: 54px;
  height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(18, 24, 32, 0.1);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(32, 42, 55, 0.08);
}

.node--center {
  left: 50%;
  top: 50%;
  width: 62px;
  height: 62px;
  transform: translate(-50%, -50%);
  background: #111315;
  color: #fff;
}

.node--tea {
  left: 3%;
  top: 45%;
}

.node--mova {
  right: 0;
  top: 45%;
}

.node--lab {
  left: 42%;
  top: 0;
}

.node--balloon {
  right: 14%;
  bottom: 6%;
}

.node--net {
  left: 8%;
  bottom: 12%;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.path-card {
  min-height: 168px;
  padding: 22px;
  border-radius: 20px;
}

.path-card span,
.motion-steps span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.path-card h3,
.motion-steps h3 {
  margin: 14px 0 8px;
  font-size: 21px;
}

.path-card p,
.motion-steps p {
  margin: 0;
  color: var(--ink-soft);
}

.motion-window {
  display: grid;
  grid-template-columns: minmax(260px, 0.55fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.motion-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.motion-steps article {
  min-height: 164px;
  padding: 22px;
  border-radius: 20px;
}

.alpha-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin: 0 34px 34px;
  padding: 24px 28px;
  border: 1px solid rgba(18, 24, 32, 0.08);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
}

.alpha-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  justify-content: flex-end;
}

.js [data-motion-stage] {
  opacity: 0;
  transform: translateY(18px) scale(0.995);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

.js [data-motion-stage].is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@media (max-width: 1280px) {
  .top-orb {
    grid-template-columns: 1fr;
    gap: 16px;
    justify-items: center;
    padding: 24px;
  }

  .nav-tools {
    position: absolute;
    right: 24px;
    top: 24px;
  }

  .hero-window {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .arrival-card {
    max-width: 520px;
  }

  .ports-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .event-strip,
  .signal-grid,
  .path-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .alpha-shell {
    width: min(100%, calc(100% - 16px));
    margin-top: 8px;
    border-radius: 26px;
  }

  .top-orb {
    position: relative;
    align-items: start;
    justify-items: start;
  }

  .main-tabs {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    gap: 24px;
    padding-bottom: 4px;
  }

  .main-tabs a {
    padding: 8px 0 12px;
    white-space: nowrap;
  }

  .main-tabs a::after {
    bottom: 5px;
  }

  .nav-tools {
    top: 18px;
    right: 18px;
  }

  .tool-button {
    width: 40px;
    height: 40px;
  }

  main {
    padding: 16px;
  }

  .hero-window {
    padding: 42px 28px;
    border-radius: 26px;
    gap: 26px;
  }

  .hero-copy h1 {
    font-size: 54px;
  }

  .hero-lede {
    font-size: 18px;
  }

  .hero-spatial-map {
    width: 320px;
  }

  .panel-section,
  .happening-window,
  .signal-console,
  .paths-window,
  .motion-window,
  .info-window,
  .relationship-window {
    border-radius: 24px;
  }

  .section-heading,
  .motion-window,
  .dual-window {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .ports-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .motion-steps {
    grid-template-columns: 1fr;
  }

  .alpha-footer {
    margin: 0 16px 16px;
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .brand-name strong {
    font-size: 17px;
  }

  .nav-tools {
    display: none;
  }

  .hero-window {
    padding: 28px 20px 24px;
    gap: 18px;
  }

  .hero-copy h1 {
    font-size: 40px;
  }

  .hero-lede {
    font-size: 15px;
    line-height: 1.5;
  }

  .hero-actions {
    flex-wrap: wrap;
  }

  .hero-spatial-map {
    position: absolute;
    right: -32px;
    bottom: 12px;
    z-index: 0;
    width: 214px;
    opacity: 0.52;
  }

  .arrival-card {
    display: none;
  }

  .arrival-card,
  .panel-section,
  .happening-window,
  .signal-console,
  .paths-window,
  .motion-window,
  .info-window,
  .relationship-window {
    padding: 20px;
  }

  .ports-grid,
  .event-strip,
  .signal-grid,
  .path-grid,
  .mini-row {
    grid-template-columns: 1fr;
  }

  .port-card {
    min-height: 330px;
  }

  .event-card,
  .signal-pill {
    grid-template-columns: 74px 1fr;
  }

  .event-card strong,
  .spark {
    display: none;
  }

  .event-thumb {
    width: 74px;
    height: 74px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }

  .js [data-motion-stage] {
    opacity: 1;
    transform: none;
  }
}