:root {
  --bg: #081017;
  --bg-soft: #0d1821;
  --panel: rgba(18, 29, 39, 0.56);
  --panel-strong: rgba(18, 29, 39, 0.82);
  --panel-border: rgba(140, 226, 221, 0.15);
  --text: #ebf4f7;
  --muted: rgba(235, 244, 247, 0.68);
  --accent: #17d4c5;
  --accent-soft: rgba(23, 212, 197, 0.16);
  --accent-2: #52a8ff;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --content-width: min(1220px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(18, 212, 197, 0.22), transparent 28%),
    radial-gradient(circle at 82% 16%, rgba(82, 168, 255, 0.22), transparent 22%),
    linear-gradient(180deg, #050b11 0%, #0a1219 38%, #091017 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

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

img {
  display: block;
  max-width: 100%;
}

.page-shell {
  position: relative;
  isolation: isolate;
}

.ambient,
.ambient-grid {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -2;
}

.ambient-a {
  background:
    radial-gradient(circle at 20% 12%, rgba(23, 212, 197, 0.24), transparent 24%),
    radial-gradient(circle at 80% 68%, rgba(82, 168, 255, 0.16), transparent 24%);
  filter: blur(30px);
  animation: driftA 18s ease-in-out infinite alternate;
}

.ambient-b {
  background:
    radial-gradient(circle at 78% 10%, rgba(23, 212, 197, 0.12), transparent 18%),
    radial-gradient(circle at 18% 80%, rgba(82, 168, 255, 0.14), transparent 20%);
  filter: blur(20px);
  animation: driftB 24s ease-in-out infinite alternate;
}

.ambient-grid {
  z-index: -1;
  opacity: 0.26;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle at center, black 42%, transparent 92%);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--scroll-progress, 0%);
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 12;
  box-shadow: 0 0 22px rgba(23, 212, 197, 0.55);
}

.glass {
  background: var(--panel);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
}

.topbar,
.section,
.footer {
  width: var(--content-width);
  margin-inline: auto;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 10;
  margin-top: 16px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-radius: 999px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-orb {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, #dffff8, transparent 35%),
    linear-gradient(145deg, var(--accent), var(--accent-2));
  box-shadow:
    0 0 0 8px rgba(23, 212, 197, 0.12),
    0 16px 30px rgba(23, 212, 197, 0.28);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-text strong {
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.brand-text small,
.header-link {
  color: var(--muted);
}

.topnav {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
}

.topnav a,
.header-link {
  transition: color 180ms ease, transform 180ms ease;
}

.topnav a:hover,
.header-link:hover {
  color: var(--text);
  transform: translateY(-1px);
}

.hero {
  width: var(--content-width);
  margin: 56px auto 0;
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 36px;
  align-items: center;
}

.hero-copy,
.hero-visual,
.feature-card,
.showcase-story,
.shot-card,
.arch-step,
.download-panel,
.community-card,
.qr-card {
  transform: translateY(24px);
  opacity: 0;
  transition:
    transform 720ms cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 720ms ease;
}

.reveal.in-view {
  transform: translateY(0);
  opacity: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  color: #b9fcf3;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.download-copy h2,
.community-card h2 {
  font-family: "Noto Sans SC", "Space Grotesk", sans-serif;
  line-height: 1.04;
}

.hero h1 {
  margin: 18px 0 18px;
  font-size: clamp(3rem, 5vw, 5.3rem);
  letter-spacing: -0.04em;
}

.hero h1 span {
  display: block;
  color: #b7fff8;
  text-shadow: 0 0 30px rgba(23, 212, 197, 0.15);
}

.lead,
.section-heading p,
.showcase-story p,
.download-copy p,
.community-card p {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.85;
}

.hero-actions,
.community-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button,
.download-card {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-width: 196px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-weight: 700;
  letter-spacing: 0.02em;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.button small {
  color: var(--muted);
  font-size: 0.78rem;
}

.button:hover,
.download-card:hover {
  transform: translateY(-4px);
  border-color: rgba(183, 255, 248, 0.28);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.28);
}

.button-primary {
  background: linear-gradient(135deg, rgba(23, 212, 197, 0.88), rgba(62, 145, 255, 0.82));
  color: #031014;
}

.button-secondary,
.button-ghost {
  background: rgba(255, 255, 255, 0.04);
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.hero-pills span {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.metric {
  border-radius: 22px;
  padding: 20px;
}

.metric strong {
  display: block;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: #b8fff9;
}

.metric span {
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-visual {
  position: relative;
  min-height: 540px;
}

.hero-glow {
  position: absolute;
  inset: 10% 8% 18%;
  background:
    radial-gradient(circle at 40% 36%, rgba(23, 212, 197, 0.24), transparent 40%),
    radial-gradient(circle at 72% 44%, rgba(82, 168, 255, 0.26), transparent 34%);
  filter: blur(48px);
  animation: pulse 10s ease-in-out infinite;
}

.hero-frame {
  position: absolute;
  right: 0;
  top: 0;
  width: 100%;
  border-radius: var(--radius-xl);
  padding: 16px;
  transform-style: preserve-3d;
  transition: transform 220ms ease;
}

.window-chrome {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.window-chrome span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.32);
}

.hero-image {
  width: 100%;
  border-radius: 24px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.35);
}

.section {
  margin-top: 108px;
}

.section-heading {
  max-width: 840px;
  margin-bottom: 32px;
}

.section-heading h2,
.download-copy h2,
.community-card h2 {
  margin: 16px 0 14px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  letter-spacing: -0.04em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.showcase-story,
.shot-card,
.arch-step,
.download-panel,
.community-card,
.qr-card {
  border-radius: var(--radius-lg);
}

.feature-card {
  padding: 24px;
  min-height: 240px;
}

.feature-icon,
.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(23, 212, 197, 0.18), rgba(82, 168, 255, 0.16));
  color: #b7fff8;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.feature-card h3,
.showcase-story h3,
.arch-step h3 {
  margin: 18px 0 12px;
  font-family: "Noto Sans SC", "Space Grotesk", sans-serif;
  font-size: 1.3rem;
}

.feature-card p,
.arch-step p,
.story-list {
  color: var(--muted);
  line-height: 1.8;
}

.showcase-layout {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.showcase-story {
  position: sticky;
  top: 112px;
  padding: 26px;
}

.story-list {
  margin: 22px 0 0;
  padding-left: 18px;
}

.story-list li + li {
  margin-top: 10px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.shot-card {
  position: relative;
  padding: 14px;
}

.shot-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      220px circle at var(--spot-x, 50%) var(--spot-y, 50%),
      rgba(183, 255, 248, 0.12),
      transparent 58%
    );
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.shot-card:hover::before {
  opacity: 1;
}

.shot-card img {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.shot-card figcaption {
  padding: 16px 8px 8px;
}

.shot-card strong,
.download-card strong,
.qr-copy strong,
.community-note strong {
  display: block;
  font-family: "Noto Sans SC", "Space Grotesk", sans-serif;
  font-size: 1.08rem;
}

.shot-card span,
.download-card small,
.download-card em,
.qr-copy span,
.community-note span {
  color: var(--muted);
  line-height: 1.75;
  font-style: normal;
}

.arch-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.arch-step {
  padding: 24px;
}

.downloads .download-panel {
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  gap: 22px;
  padding: 28px;
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.download-card {
  padding: 22px;
  min-height: 220px;
}

.download-type {
  display: inline-flex;
  margin-bottom: 18px;
  color: #b9fcf3;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: 20px;
}

.community-card,
.qr-card {
  padding: 28px;
}

.community-note {
  margin-top: 24px;
  padding: 18px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.copy-button.is-copied {
  background: linear-gradient(135deg, rgba(23, 212, 197, 0.88), rgba(82, 168, 255, 0.82));
  color: #031014;
}

.qr-card img {
  width: min(100%, 360px);
  margin-inline: auto;
  border-radius: 24px;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
}

.qr-copy {
  text-align: center;
  margin-top: 18px;
}

.tilt-surface {
  transform-style: preserve-3d;
  transition: transform 220ms ease;
}

@keyframes driftA {
  from {
    transform: translate3d(-1.5%, -1%, 0) scale(1);
  }
  to {
    transform: translate3d(2%, 1.5%, 0) scale(1.08);
  }
}

@keyframes driftB {
  from {
    transform: translate3d(1%, 0.5%, 0) scale(1);
  }
  to {
    transform: translate3d(-1.5%, -2%, 0) scale(1.06);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(0.96);
    opacity: 0.78;
  }
  50% {
    transform: scale(1.04);
    opacity: 1;
  }
}

@media (max-width: 1120px) {
  .hero,
  .downloads .download-panel,
  .showcase-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .showcase-story {
    position: static;
  }

  .feature-grid,
  .arch-rail,
  .download-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-visual {
    min-height: auto;
  }

  .hero-frame {
    position: relative;
  }
}

@media (max-width: 780px) {
  .topbar {
    border-radius: 28px;
    display: grid;
    grid-template-columns: 1fr;
  }

  .topnav {
    flex-wrap: wrap;
    gap: 12px 16px;
  }

  .hero {
    margin-top: 36px;
  }

  .hero-metrics,
  .feature-grid,
  .gallery-grid,
  .arch-rail,
  .download-cards {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .hero h1 {
    font-size: 2.7rem;
  }

  .section {
    margin-top: 84px;
  }
}