:root {
  color-scheme: light;
  --ink: #101214;
  --muted: #5f6975;
  --line: #d7dde4;
  --paper: #f8fafc;
  --white: #ffffff;
  --carbon: #111827;
  --cyan: #27c7d8;
  --green: #42c77b;
  --gold: #f5b841;
  --coral: #f26f63;
  --violet: #7257ff;
  --shadow: 0 24px 80px rgba(17, 24, 39, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(248, 250, 252, 0.88);
  border-bottom: 1px solid rgba(16, 18, 20, 0.08);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.signal-strip,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 800;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: block;
  object-fit: contain;
  border-radius: 50%;
  background: #000b1c;
  box-shadow: 0 10px 28px rgba(114, 87, 255, 0.24);
}

.nav-links {
  gap: 8px;
  color: #343b44;
  font-size: 14px;
  font-weight: 650;
}

.nav-links a {
  padding: 10px 12px;
  border-radius: 8px;
}

.nav-links a:hover,
.github-link {
  background: rgba(16, 18, 20, 0.07);
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  min-height: calc(100vh - 72px);
  padding: clamp(36px, 5vw, 76px) clamp(20px, 5vw, 72px);
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.94), rgba(248, 250, 252, 0.9)),
    radial-gradient(circle at 82% 18%, rgba(39, 199, 216, 0.26), transparent 28%),
    radial-gradient(circle at 68% 82%, rgba(66, 199, 123, 0.2), transparent 24%);
}

.hero-copy {
  max-width: 760px;
}

.eyebrow,
.section-kicker,
.panel-label,
.layer-list span,
.timeline-item span,
.architecture-card span {
  color: var(--coral);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

code {
  padding: 2px 5px;
  border-radius: 5px;
  color: #17202b;
  background: #edf2f7;
  font-size: 0.92em;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(54px, 9vw, 118px);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(32px, 5vw, 64px);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.2;
}

p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.hero-lede {
  max-width: 670px;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.55;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
}

.primary-action {
  color: var(--white);
  background: var(--carbon);
}

.secondary-action {
  color: var(--carbon);
  background: var(--white);
  border: 1px solid var(--line);
}

.principle-line {
  display: inline-flex;
  width: fit-content;
  padding: 10px 14px;
  border: 1px solid rgba(114, 87, 255, 0.24);
  border-radius: 8px;
  color: var(--ink);
  background: rgba(114, 87, 255, 0.08);
  font-weight: 900;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 10px;
}

.download-actions .primary-action,
.download-actions .secondary-action {
  min-height: 42px;
  padding: 0 14px;
  font-size: 13px;
}

.dark-section .download-actions .primary-action {
  background: linear-gradient(135deg, var(--violet), var(--blue));
}

.dark-section .download-actions .secondary-action {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
}

.runtime-visual {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid rgba(16, 18, 20, 0.12);
  border-radius: 8px;
  background: #111827;
  box-shadow: var(--shadow);
}

.runtime-map {
  position: relative;
  min-height: 520px;
  padding: 34px;
  background:
    radial-gradient(circle at 50% 42%, rgba(114, 87, 255, 0.34), transparent 32%),
    radial-gradient(circle at 22% 20%, rgba(39, 199, 216, 0.22), transparent 24%),
    radial-gradient(circle at 78% 72%, rgba(66, 199, 123, 0.16), transparent 28%),
    #111827;
}

.runtime-node,
.runtime-chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-radius: 999px;
  color: var(--white);
  font-weight: 900;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

.runtime-node.core {
  top: 40%;
  left: 50%;
  width: 132px;
  height: 132px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(142, 231, 240, 0.42);
  background: linear-gradient(135deg, rgba(114, 87, 255, 0.95), rgba(39, 199, 216, 0.72));
  font-size: 24px;
  letter-spacing: 0;
}

.runtime-ring {
  position: absolute;
  inset: 86px;
  border: 1px solid rgba(142, 231, 240, 0.22);
  border-radius: 999px;
}

.runtime-ring.ring-two {
  inset: 42px;
  border-color: rgba(114, 87, 255, 0.28);
}

.runtime-chip {
  max-width: 190px;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(16px);
  font-size: 13px;
  line-height: 1.2;
}

.runtime-chip.chip-a {
  top: 17%;
  left: 44%;
}

.runtime-chip.chip-b {
  top: 36%;
  right: 8%;
}

.runtime-chip.chip-c {
  right: 18%;
  bottom: 26%;
}

.runtime-chip.chip-d {
  bottom: 22%;
  left: 16%;
}

.runtime-chip.chip-e {
  top: 36%;
  left: 7%;
}

.runtime-chip.chip-f {
  top: 15%;
  right: 14%;
}

.runtime-panel {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.runtime-panel div {
  min-width: 0;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.runtime-panel strong {
  display: block;
  overflow-wrap: anywhere;
  color: var(--white);
  font-size: clamp(17px, 2vw, 24px);
  line-height: 1.1;
}

.signal-strip {
  justify-content: center;
  gap: 1px;
  padding: 0 clamp(20px, 5vw, 72px);
  transform: translateY(-34px);
}

.signal-strip div {
  width: min(33.333%, 360px);
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
}

.signal-strip div:first-child {
  border-radius: 8px 0 0 8px;
}

.signal-strip div:last-child {
  border-radius: 0 8px 8px 0;
}

.signal-strip span,
.signal-strip strong {
  display: block;
}

.signal-strip span {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.signal-strip strong {
  font-size: clamp(18px, 2vw, 24px);
}

.section {
  padding: clamp(70px, 10vw, 130px) clamp(20px, 5vw, 72px);
}

.narrow {
  max-width: 1020px;
  margin: 0 auto;
  padding-top: 36px;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 42px;
}

.architecture-grid,
.surface-grid,
.systems-grid,
.service-grid,
.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.architecture-card,
.mode-grid article,
.surface-grid article,
.systems-grid article,
.service-grid article,
.status-grid article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.architecture-card p,
.mode-grid p,
.timeline-item p,
.layer-list p,
.surface-grid p,
.systems-grid p,
.service-grid p,
.status-grid p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.55;
}

.status-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.status-grid span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

.screenshot-grid article {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 16px 45px rgba(17, 24, 39, 0.08);
}

.screenshot-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.screenshot-grid h3,
.screenshot-grid p {
  padding-right: 22px;
  padding-left: 22px;
}

.screenshot-grid h3 {
  margin-top: 20px;
}

.screenshot-grid p {
  margin-bottom: 22px;
  font-size: 15px;
  line-height: 1.55;
}

.product-surface {
  padding-top: 48px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1.2fr);
  gap: clamp(32px, 6vw, 92px);
  align-items: start;
}

.layer-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: layer;
}

.layer-list li {
  padding: 22px;
  border-left: 5px solid var(--cyan);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 40px rgba(17, 24, 39, 0.07);
}

.layer-list li:nth-child(2) {
  border-color: var(--green);
}

.layer-list li:nth-child(3) {
  border-color: var(--gold);
}

.layer-list li:nth-child(4) {
  border-color: var(--violet);
}

.layer-list strong {
  display: block;
  margin: 4px 0 8px;
  font-size: 20px;
}

.dark-section {
  color: var(--white);
  background: #111827;
}

.dark-section p {
  color: #c6d0da;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.timeline-item {
  min-height: 210px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.timeline-item span {
  color: var(--cyan);
}

.systems-grid article {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
}

.systems-grid span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.systems-grid h3 {
  color: var(--white);
}

.service-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.service-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
}

.service-grid code {
  display: inline-block;
  margin: 2px 1px;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

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

.principles p {
  margin: 0;
  padding: 12px 16px;
  color: var(--ink);
  font-weight: 800;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.site-footer {
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: #d7dde4;
  background: #0f141b;
}

.site-footer a {
  color: #8ee7f0;
  overflow-wrap: anywhere;
}

@media (max-width: 980px) {
  .site-header {
    position: relative;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero-section,
  .split-section {
    grid-template-columns: 1fr;
  }

  .runtime-visual,
  .runtime-map {
    min-height: 460px;
  }

  .architecture-grid,
  .surface-grid,
  .systems-grid,
  .service-grid,
  .status-grid,
  .timeline,
  .mode-grid,
  .screenshot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .signal-strip {
    transform: none;
    margin-top: 24px;
  }
}

@media (max-width: 680px) {
  .hero-section {
    min-height: auto;
  }

  .runtime-panel,
  .architecture-grid,
  .surface-grid,
  .systems-grid,
  .service-grid,
  .status-grid,
  .timeline,
  .mode-grid,
  .screenshot-grid {
    grid-template-columns: 1fr;
  }

  .runtime-map {
    min-height: 390px;
    padding: 18px;
  }

  .runtime-node.core {
    width: 104px;
    height: 104px;
    font-size: 19px;
  }

  .runtime-ring {
    inset: 72px 28px;
  }

  .runtime-ring.ring-two {
    inset: 36px 14px;
  }

  .runtime-chip {
    max-width: 145px;
    min-height: 36px;
    padding: 8px 10px;
    font-size: 11px;
  }

  .runtime-panel {
    position: relative;
    right: auto;
    bottom: auto;
    left: auto;
    padding: 14px;
    background: #111827;
  }

  .signal-strip {
    display: grid;
    gap: 10px;
  }

  .signal-strip div {
    width: 100%;
    border-radius: 8px;
  }

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