:root {
  color-scheme: dark;
  --bg: #030506;
  --panel: rgba(10, 17, 20, 0.72);
  --panel-strong: rgba(12, 22, 27, 0.92);
  --line: rgba(102, 206, 255, 0.18);
  --line-hot: rgba(249, 169, 72, 0.32);
  --text: #f4f7f8;
  --muted: #a8b7bc;
  --dim: #6f858d;
  --orange: #f9a948;
  --orange-hot: #ffb547;
  --cyan: #66ceff;
  --purple: #957dff;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 82% 10%, rgba(102, 206, 255, 0.18), transparent 34rem),
    radial-gradient(circle at 10% 18%, rgba(249, 169, 72, 0.13), transparent 28rem),
    linear-gradient(180deg, #020405 0%, #05090b 42%, #020405 100%);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background-image:
    linear-gradient(rgba(102, 206, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 206, 255, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

#mesh-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.86;
}

a { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(3, 5, 6, 0.84), rgba(3, 5, 6, 0.48));
  border-bottom: 1px solid rgba(102, 206, 255, 0.1);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-hot);
  border-radius: 10px;
  background: radial-gradient(circle at 35% 25%, rgba(255, 181, 71, 0.45), rgba(249, 169, 72, 0.1) 42%, rgba(102, 206, 255, 0.08));
  color: var(--orange-hot);
  box-shadow: 0 0 36px rgba(249, 169, 72, 0.22);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a {
  text-decoration: none;
  transition: color 160ms ease;
}

.nav-links a:hover { color: var(--cyan); }

.button,
.link-card {
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(102, 206, 255, 0.22);
  background: rgba(102, 206, 255, 0.08);
  color: var(--text);
  text-decoration: none;
  font-weight: 620;
}

.button.primary {
  border-color: rgba(249, 169, 72, 0.5);
  background: linear-gradient(135deg, #f7931a, #ffb547);
  color: #080603;
  box-shadow: 0 14px 46px rgba(249, 169, 72, 0.25);
}

.button:hover,
.link-card:hover {
  transform: translateY(-2px);
  border-color: rgba(102, 206, 255, 0.42);
}

main { position: relative; }
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 88px 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 340px);
  gap: 38px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding-top: 72px;
  overflow: visible;
}

.hero > div:first-child {
  position: relative;
  z-index: 2;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 18px var(--orange);
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 24px;
  max-width: 880px;
  font-size: clamp(3.8rem, 10vw, 8.5rem);
  line-height: 0.88;
  letter-spacing: -0.08em;
}

.gradient-text {
  background: linear-gradient(135deg, #fff 0%, #dff7ff 31%, #66ceff 58%, #ffb547 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title-rotator {
  width: max-content;
  max-width: none;
  margin-bottom: 24px;
  overflow: visible;
  font-size: clamp(3.6rem, 8.4vw, 7.25rem);
  line-height: 1.06;
  letter-spacing: -0.058em;
}

.hero-line {
  display: block;
  width: max-content;
  max-width: none;
  line-height: 1.06;
  white-space: nowrap;
}

.hero-rotating-part {
  display: grid;
  width: max-content;
  overflow: visible;
  isolation: isolate;
  transition: opacity 1800ms ease-in-out;
}

.hero-rotating-part.is-fading {
  opacity: 0;
}

.hero-phrase {
  grid-area: 1 / 1;
  display: block;
  width: max-content;
  overflow: visible;
  padding-bottom: 0.12em;
  margin-bottom: -0.12em;
  opacity: 0;
  visibility: hidden;
  background: linear-gradient(135deg, #fff 0%, #dff7ff 31%, #66ceff 58%, #ffb547 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity 1200ms ease-in-out, visibility 0s linear 1200ms;
  pointer-events: none;
}

.hero-phrase.is-active {
  opacity: 1;
  visibility: visible;
  transition: opacity 1200ms ease-in-out, visibility 0s linear 0s;
}

.hero-line-fixed {
  background: none;
}

.lede {
  max-width: 690px;
  color: #d3e0e4;
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  line-height: 1.58;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 30px;
}

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

.signal {
  border: 1px solid rgba(102, 206, 255, 0.16);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
}

.product-card {
  position: relative;
  z-index: 1;
  margin-top: 148px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(15, 28, 34, 0.84), rgba(4, 8, 10, 0.8));
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.product-card::before {
  content: "";
  position: absolute;
  inset: -40% -30% auto auto;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(102, 206, 255, 0.25), transparent 66%);
}

.terminal {
  position: relative;
  padding: 22px;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(102, 206, 255, 0.14);
}

.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--dim); }
.dot.hot { background: var(--orange); box-shadow: 0 0 18px var(--orange); }
.dot.cool { background: var(--cyan); box-shadow: 0 0 18px var(--cyan); }

.map {
  padding: 32px 4px 10px;
  display: grid;
  gap: 16px;
}

.node-line {
  display: grid;
  grid-template-columns: 112px 1fr auto;
  gap: 16px;
  align-items: center;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86rem;
}

.track {
  height: 2px;
  background: linear-gradient(90deg, rgba(249, 169, 72, 0.8), rgba(102, 206, 255, 0.8));
  box-shadow: 0 0 18px rgba(102, 206, 255, 0.3);
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.panel,
.link-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  padding: 24px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.panel h3,
.link-card h3 {
  color: var(--text);
  margin-bottom: 10px;
  font-size: 1.12rem;
}

.panel p,
.link-card p {
  color: var(--muted);
  line-height: 1.62;
  margin-bottom: 0;
}

.feature-band {
  position: relative;
}

.feature-band::before {
  content: "";
  position: absolute;
  inset: 42px 24px;
  z-index: -1;
  border: 1px solid rgba(102, 206, 255, 0.09);
  border-radius: 34px;
  background: linear-gradient(135deg, rgba(12, 22, 27, 0.28), rgba(4, 8, 10, 0.1));
}

.secure-band::before {
  border-color: rgba(249, 169, 72, 0.15);
  background: radial-gradient(circle at 10% 10%, rgba(249, 169, 72, 0.08), transparent 28rem);
}

.easy-band::before {
  background: radial-gradient(circle at 85% 12%, rgba(102, 206, 255, 0.1), transparent 28rem);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(280px, 0.5fr);
  gap: 36px;
  align-items: end;
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: clamp(2.4rem, 5vw, 4.9rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
  margin-bottom: 0;
}

.section-heading p {
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.architecture {
  border: 1px solid var(--line-hot);
  border-radius: 30px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(249, 169, 72, 0.08), rgba(102, 206, 255, 0.05));
}

.layer {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.layer:last-child { border-bottom: 0; }
.stack-diagram .layer {
  background: linear-gradient(90deg, rgba(102, 206, 255, 0.025), transparent 60%);
}
.stack-diagram .layer:nth-child(odd) {
  background: linear-gradient(90deg, rgba(249, 169, 72, 0.035), transparent 60%);
}
.stack-diagram .base-layer {
  background: linear-gradient(135deg, rgba(249, 169, 72, 0.16), rgba(102, 206, 255, 0.055));
  box-shadow: inset 0 1px 0 rgba(255, 181, 71, 0.18);
}
.layer-label {
  color: var(--orange-hot);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.layer h3 { margin-bottom: 8px; }
.layer p { color: var(--muted); line-height: 1.65; margin-bottom: 0; }

.essay-feature,
.link-grid {
  display: grid;
  gap: 16px;
}

.essay-feature {
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
}

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

.link-card,
.essay-card {
  min-height: 190px;
  color: inherit;
  text-decoration: none;
  background: linear-gradient(180deg, rgba(12, 22, 27, 0.86), rgba(6, 10, 12, 0.82));
}

.essay-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 28px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.primary-essay {
  min-height: 310px;
  background:
    radial-gradient(circle at 88% 8%, rgba(249, 169, 72, 0.18), transparent 18rem),
    linear-gradient(135deg, rgba(18, 31, 37, 0.94), rgba(6, 10, 12, 0.86));
  border-color: var(--line-hot);
}

.primary-essay h3 {
  max-width: 720px;
  margin: 22px 0 16px;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.essay-card p {
  color: var(--muted);
  line-height: 1.68;
}

.muted-essay {
  background: rgba(255, 255, 255, 0.035);
}

.link-card .arrow,
.essay-card .arrow {
  display: inline-block;
  margin-top: 24px;
  color: var(--cyan);
}

.footer {
  border-top: 1px solid rgba(102, 206, 255, 0.12);
  color: var(--dim);
}

.footer .section {
  padding-top: 34px;
  padding-bottom: 38px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.npub {
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (max-width: 900px) {
  .nav { align-items: flex-start; }
  .nav-links { display: none; }
  .hero,
  .section-heading,
  .layer { grid-template-columns: 1fr; }
  .panel-grid,
  .essay-feature,
  .link-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 64px; }
  .product-card { margin-top: 8px; }
  .hero-rotating-part { display: grid; }
}

@media (max-width: 560px) {
  .section { padding: 64px 18px; }
  .nav { padding: 14px 18px; }
  .hero-title-rotator {
    width: auto;
    max-width: 100%;
    font-size: clamp(2.8rem, 13vw, 4.6rem);
  }
  .hero-line,
  .hero-rotating-part,
  .hero-phrase {
    width: auto;
    max-width: 100%;
    white-space: normal;
  }
  .hero-actions .button { width: 100%; }
  .node-line { grid-template-columns: 1fr; gap: 8px; }
  .track { width: 100%; }
}