*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #090A0F;
  --cyan: #009596;
  --cyan-light: #4ECDC4;
  --amber: #FFAA00;
  --text: #E2E8F0;
  --text-dim: #7B8FA1;
  --text-muted: #4A5568;
  --glass: rgba(255, 255, 255, 0.04);
  --glass-hover: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.08);
  --max-width: 960px;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: var(--cyan-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Starfield ---- */
.starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
}

.stars1, .stars2 {
  position: absolute;
  inset: 0;
  background: transparent;
}

.stars1 {
  background-image:
    radial-gradient(1px 1px at 50px 50px, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 150px 120px, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 280px 80px, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 400px 200px, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 520px 150px, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 680px 280px, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 800px 100px, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 920px 320px, rgba(255,255,255,0.6), transparent),
    radial-gradient(1.5px 1.5px at 100px 300px, rgba(255,255,255,0.7), transparent),
    radial-gradient(1.5px 1.5px at 350px 400px, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 600px 50px, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 750px 380px, rgba(255,255,255,0.3), transparent),
    radial-gradient(2px 2px at 200px 200px, rgba(78,205,196,0.35), transparent),
    radial-gradient(1.5px 1.5px at 500px 300px, rgba(255,170,0,0.25), transparent),
    radial-gradient(1px 1px at 850px 420px, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 30px 440px, rgba(255,255,255,0.3), transparent);
  background-size: 1000px 480px;
  animation: drift 120s linear infinite;
}

.stars2 {
  background-image:
    radial-gradient(1px 1px at 70px 180px, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 250px 350px, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 450px 100px, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 650px 250px, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 850px 50px, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 180px 420px, rgba(78,205,196,0.15), transparent);
  background-size: 1000px 450px;
  animation: drift 200s linear infinite;
}

@keyframes drift { to { background-position: 1000px 0; } }

/* ---- Fade-in ---- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---- Nav ---- */
.topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(9, 10, 15, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

.topnav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--cyan-light);
  text-decoration: none;
}
.topnav-brand:hover { text-decoration: none; }
.topnav-brand img { width: 28px; height: 28px; border-radius: 6px; }

.topnav-links { display: flex; gap: 20px; align-items: center; }
.topnav-links a {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 500;
}
.topnav-links a:hover { color: var(--cyan-light); text-decoration: none; }

/* ---- Hero ---- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
}

.hero-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  margin-bottom: 24px;
  box-shadow: 0 8px 40px rgba(0, 149, 150, 0.2);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--cyan-light) 50%, var(--amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .tagline {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); text-decoration: none; }

.btn-primary {
  background: var(--cyan);
  color: #fff;
  box-shadow: 0 4px 24px rgba(0, 149, 150, 0.3);
}
.btn-primary:hover { box-shadow: 0 6px 32px rgba(0, 149, 150, 0.4); }

.btn-ghost {
  background: var(--glass);
  color: var(--text-dim);
  border: 1px solid var(--glass-border);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan-light); }

.hero-meta {
  margin-top: 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---- Network (Features) ---- */
.network {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px 80px;
  position: relative;
}

.network h2 {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 48px;
}

.node {
  background: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 24px;
  position: relative;
  transition: border-color 0.3s ease, transform 0.2s ease;
}

.node:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.node::before {
  content: '';
  position: absolute;
  top: -24px;
  left: 50%;
  width: 1px;
  height: 24px;
  background: linear-gradient(to bottom, transparent, var(--glass-border));
  pointer-events: none;
}
.node:first-of-type::before { display: none; }

.node .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  display: inline-block;
  margin-right: 10px;
  vertical-align: middle;
}

.node h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  display: inline;
}

.node p {
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.7;
  margin-top: 8px;
}

/* ---- Screenshots ---- */
.showcase {
  padding: 80px 24px;
  text-align: center;
  overflow: hidden;
}

.showcase h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.showcase-top {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 16px;
  margin-bottom: 8px;
  position: relative;
}

.showcase .subtitle {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-bottom: 40px;
}

/* Theme toggle */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
  transition: border-color 0.25s ease, background 0.25s ease;
  backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  border-color: var(--cyan);
  background: var(--glass-hover);
}

.showcase-item img {
  transition: opacity 0.15s ease;
}

.showcase-track {
  display: flex;
  gap: 20px;
  padding: 0 max(24px, calc((100vw - 880px) / 2));
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.showcase-track::-webkit-scrollbar { display: none; }

.showcase-item {
  flex: 0 0 200px;
  scroll-snap-align: center;
  background: var(--glass);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.3s ease;
}
.showcase-item:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}
.showcase-item img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--bg);
}
.showcase-item .label {
  padding: 12px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dim);
  text-align: center;
}

/* ---- Install ---- */
.install {
  padding: 80px 24px;
  border-top: 1px solid var(--glass-border);
}

.install-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.install h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.install .subtitle {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-bottom: 40px;
}

.install-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.install-option {
  background: var(--glass);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 24px 20px;
  text-align: left;
  transition: border-color 0.2s ease;
}
.install-option:hover { border-color: var(--cyan); }
.install-option h3 { font-size: 0.95rem; margin-bottom: 6px; }
.install-option p { font-size: 0.82rem; color: var(--text-dim); margin-bottom: 14px; }
.install-option .btn { width: 100%; justify-content: center; padding: 10px 16px; font-size: 0.85rem; }

.install-note {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--glass-border);
  padding: 32px 24px;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.footer-links a { color: var(--text-muted); font-size: 0.82rem; }
.footer-links a:hover { color: var(--cyan-light); }

footer .note {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.6;
}

footer .epigraph {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 12px;
  font-style: italic;
  opacity: 0.6;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .topnav-links a:not(:last-child) { display: none; }
  .hero { padding: 100px 16px 60px; }
  .hero h1 { font-size: 2.4rem; }
  .network { padding: 0 16px 48px; }
  .install-options { grid-template-columns: 1fr; }
  .showcase-item { flex: 0 0 160px; }
}