:root {
  color-scheme: dark light;
  --bg: #f2f3ef;
  --panel: #101411;
  --panel-soft: #171d18;
  --panel-line: rgba(226, 234, 228, 0.08);
  --text: #121613;
  --muted: #526157;
  --white: #edf1ed;
  --signal: #53e38a;
  --signal-soft: rgba(83, 227, 138, 0.14);
  --line: rgba(18, 22, 19, 0.12);
  --shadow: 0 40px 100px rgba(12, 18, 15, 0.12);
  --radius-xl: 36px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(83, 227, 138, 0.08), transparent 28rem),
    radial-gradient(circle at bottom right, rgba(16, 20, 17, 0.08), transparent 30rem),
    var(--bg);
  color: var(--text);
}

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

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

.site-shell {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
  padding-bottom: 5rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem 0 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
}

.brand img {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.85rem;
  box-shadow: 0 16px 34px rgba(15, 19, 16, 0.18);
}

.topnav {
  display: inline-flex;
  align-items: center;
  gap: 1.2rem;
  color: var(--muted);
  font-size: 0.96rem;
}

.topbar-actions {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.22rem;
  border-radius: 999px;
  background: rgba(18, 22, 19, 0.05);
  border: 1px solid rgba(18, 22, 19, 0.08);
}

.language-button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  min-width: 3.2rem;
  min-height: 2.2rem;
  padding: 0 0.8rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.language-button:hover {
  transform: translateY(-1px);
}

.language-button.is-active {
  background: var(--panel);
  color: var(--white);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(20rem, 0.9fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
  min-height: calc(100vh - 5rem);
  padding: 4rem 0;
}

.hero-copy h1,
.section-heading h2,
.preview-copy h2,
.download-panel h2 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.8rem, 5vw, 5.4rem);
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  max-width: 11ch;
}

.eyebrow,
.story-index {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lede,
.preview-copy p,
.download-panel p {
  max-width: 42rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.7;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.community-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.2rem;
}

.community-card {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 1.05rem;
  border-radius: var(--radius-md);
  background: rgba(18, 22, 19, 0.04);
  border: 1px solid rgba(18, 22, 19, 0.08);
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.community-card:hover {
  transform: translateY(-1px);
  border-color: rgba(18, 22, 19, 0.18);
  background: rgba(18, 22, 19, 0.06);
}

.community-kicker {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.community-card strong {
  font-size: 1rem;
}

.community-card span {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.support-note {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.6;
}

.support-note a {
  color: var(--text);
  font-weight: 700;
}

.support-note-download {
  margin-top: 1.25rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0 1.3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--panel);
  color: var(--white);
}

.button-secondary {
  background: rgba(18, 22, 19, 0.04);
  border-color: rgba(18, 22, 19, 0.08);
}

.signal-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  padding: 0;
  margin: 2rem 0 0;
  list-style: none;
}

.signal-rail li,
.module-strip span {
  display: inline-flex;
  align-items: center;
  min-height: 2.2rem;
  padding: 0 0.9rem;
  border-radius: 999px;
  background: rgba(18, 22, 19, 0.06);
  color: var(--text);
  border: 1px solid rgba(18, 22, 19, 0.08);
}

.hero-stage {
  position: relative;
  min-height: 42rem;
}

.stage-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.stage-card-primary {
  position: relative;
  padding: 2rem;
  background:
    radial-gradient(circle at top left, rgba(83, 227, 138, 0.16), transparent 20rem),
    linear-gradient(145deg, #161c17, #0f1411);
  box-shadow: var(--shadow);
}

.stage-window-bar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.stage-window-bar span {
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: rgba(237, 241, 237, 0.2);
}

.stage-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1rem;
}

.stage-panel {
  min-height: 12rem;
  padding: 1.2rem;
  border-radius: var(--radius-lg);
  background: rgba(237, 241, 237, 0.04);
  border: 1px solid var(--panel-line);
}

.stage-panel-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  grid-row: span 2;
}

.stage-panel-icon img {
  width: 100%;
  max-width: 17rem;
}

.stage-panel p,
.stage-card-floating p {
  margin: 0;
  color: rgba(237, 241, 237, 0.64);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.stage-panel strong {
  display: block;
  margin-top: 0.75rem;
  color: var(--white);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.6rem;
  line-height: 1.1;
}

.meter {
  margin-top: 1rem;
  height: 0.82rem;
  border-radius: 999px;
  background: rgba(237, 241, 237, 0.08);
  overflow: hidden;
}

.meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
}

.meter-green span {
  background: linear-gradient(90deg, #7cffa5, #43d57f);
}

.meter-white span {
  background: linear-gradient(90deg, #f4f6f4, #cdd4ce);
}

.throughput {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.55rem;
  align-items: end;
  margin-top: 1.25rem;
  min-height: 4.5rem;
}

.throughput span {
  display: block;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(83, 227, 138, 1), rgba(83, 227, 138, 0.18));
}

.throughput span:nth-child(1) { height: 1.3rem; }
.throughput span:nth-child(2) { height: 3.8rem; }
.throughput span:nth-child(3) { height: 2rem; }
.throughput span:nth-child(4) { height: 2.8rem; }
.throughput span:nth-child(5) { height: 1.8rem; }
.throughput span:nth-child(6) { height: 3.2rem; }

.stage-card-floating {
  position: absolute;
  right: -1rem;
  bottom: 2.5rem;
  width: min(20rem, 48%);
  padding: 1.25rem;
  background: rgba(242, 243, 239, 0.92);
  border: 1px solid rgba(18, 22, 19, 0.08);
  box-shadow: 0 28px 60px rgba(11, 16, 13, 0.12);
}

.stage-card-floating ul {
  display: grid;
  gap: 0.65rem;
  padding: 0;
  margin: 1rem 0 0;
  list-style: none;
}

.stage-card-floating li {
  padding: 0.8rem 0.95rem;
  border-radius: 1rem;
  background: rgba(18, 22, 19, 0.05);
  font-weight: 600;
}

.section {
  padding: 5rem 0;
}

.section-heading {
  display: grid;
  gap: 1rem;
  margin-bottom: 2rem;
}

.section-heading h2 {
  max-width: 12ch;
  font-size: clamp(2.2rem, 4vw, 4rem);
}

.feature-columns,
.story-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}

.feature-columns article,
.story-card {
  padding: 1.4rem 1.5rem;
  border-top: 1px solid var(--line);
}

.feature-columns h3,
.story-card h3 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.35rem;
}

.feature-columns p,
.story-card p {
  margin: 0.9rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.section-preview {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(22rem, 1.15fr);
  gap: 2rem;
  align-items: center;
}

.preview-image {
  padding: 1.25rem;
  border-radius: var(--radius-xl);
  background: rgba(18, 22, 19, 0.04);
  border: 1px solid rgba(18, 22, 19, 0.08);
}

.module-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 2rem;
}

.story-card {
  border: 1px solid rgba(18, 22, 19, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.42);
}

.story-index {
  margin-bottom: 1.5rem;
}

.section-download {
  padding-bottom: 1rem;
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: center;
  padding: 2rem;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at top left, rgba(83, 227, 138, 0.12), transparent 18rem),
    linear-gradient(155deg, #141914, #0f1310);
  color: var(--white);
}

.download-panel p,
.download-panel .eyebrow {
  color: rgba(237, 241, 237, 0.72);
}

.download-panel .button-secondary {
  color: var(--white);
  background: rgba(237, 241, 237, 0.08);
  border-color: rgba(237, 241, 237, 0.14);
}

.download-panel .button-primary {
  background: var(--signal);
  color: #102014;
}

@media (max-width: 1024px) {
  .hero,
  .section-preview,
  .download-panel,
  .feature-columns,
  .story-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

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

  .stage-card-floating {
    position: static;
    width: auto;
    margin-top: 1rem;
  }

  .community-rail {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(calc(100% - 1.25rem), var(--container));
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
    align-items: flex-start;
    flex-direction: column;
  }

  .topnav {
    flex-wrap: wrap;
  }

  .stage-grid {
    grid-template-columns: 1fr;
  }

  .stage-panel-icon {
    grid-row: auto;
  }

  .feature-columns article,
  .story-card,
  .download-panel,
  .stage-card-primary {
    padding-inline: 1.1rem;
  }
}

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

  .button {
    transition: none;
  }
}