/* =====================================================================
   NightSeam landing page — classic hub site design.
   Multi-section classic layout (sticky nav, hero, features, stats, CTA,
   footer) over the app's Glass starfield. System fonts, no JS, no
   external assets. The starfield reuses the app's seam-free technique:
   one uniform 480px tile for all star layers.
   ===================================================================== */

:root {
  color-scheme: dark;
  --bg: #070a15;
  --panel: #0d1326;
  --panel2: #111833;
  --border-soft: #1e2848;
  --text: #dfe7ff;
  --dim: #93a3cc;
  --faint: #67749c;
  --accent: #8f7bff;
  --accent2: #4fd9c1;
  --accent-ink: #0a0d1a;
  --gold: #ffd166;
  --pink: #ff7eb6;
  --blue: #7cc4ff;
  --green: #7bf1a8;
  --font-ui: "Segoe UI", "Aptos", system-ui, sans-serif;
  --font-mono: Consolas, "Cascadia Mono", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* === SKY: viewport-locked starfield, one uniform 480px tile === */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1px 1px at 12% 24%, rgba(255,255,255,0.14) 0%, transparent 100%),
    radial-gradient(1px 1px at 34% 58%, rgba(255,255,255,0.10) 0%, transparent 100%),
    radial-gradient(1px 1px at 56% 12%, rgba(255,255,255,0.16) 0%, transparent 100%),
    radial-gradient(1px 1px at 74% 66%, rgba(255,255,255,0.12) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 34%, rgba(255,255,255,0.15) 0%, transparent 100%),
    radial-gradient(1px 1px at 26% 82%, rgba(255,255,255,0.11) 0%, transparent 100%),
    radial-gradient(2px 2px at 8% 42%, rgba(255,255,255,0.20) 0%, rgba(255,255,255,0.07) 50%, transparent 100%),
    radial-gradient(2px 2px at 42% 74%, rgba(255,255,255,0.23) 0%, rgba(255,255,255,0.08) 50%, transparent 100%),
    radial-gradient(2px 2px at 68% 26%, rgba(255,255,255,0.20) 0%, rgba(255,255,255,0.07) 50%, transparent 100%),
    radial-gradient(2px 2px at 88% 84%, rgba(255,255,255,0.22) 0%, rgba(255,255,255,0.08) 50%, transparent 100%),
    radial-gradient(3px 3px at 16% 62%, rgba(255,255,255,0.32) 0%, rgba(255,255,255,0.10) 40%, transparent 100%),
    radial-gradient(3px 3px at 82% 38%, rgba(255,255,255,0.37) 0%, rgba(255,255,255,0.12) 40%, transparent 100%),
    radial-gradient(3px 3px at 48% 12%, rgba(255,255,255,0.33) 0%, rgba(255,255,255,0.10) 40%, transparent 100%),
    radial-gradient(ellipse 80% 60% at 30% 70%, rgba(79,217,193,0.10) 0%, transparent 70%),
    radial-gradient(ellipse 70% 50% at 70% 28%, rgba(143,123,255,0.09) 0%, transparent 70%),
    linear-gradient(180deg, rgba(0,0,0,0) 55%, rgba(2,4,10,0.30) 100%),
    linear-gradient(180deg, #0b1020 0%, #070a15 55%, #04060c 100%);
  background-size:
    480px 480px, 480px 480px, 480px 480px, 480px 480px, 480px 480px, 480px 480px,
    480px 480px, 480px 480px, 480px 480px, 480px 480px,
    480px 480px, 480px 480px, 480px 480px,
    100% 100%, 100% 100%, 100% 100%, 100% 100%;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

header, main, footer { position: relative; z-index: 1; }

/* ================= HEADER / NAV ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 10, 21, 0.82);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.navrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 24px;
  max-width: 1120px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.brand-ico {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 0 22px rgba(143,123,255,0.25);
}
.brand-name { font-size: 19px; font-weight: 700; letter-spacing: .3px; }
.brand-name em { color: var(--accent); font-style: normal; }
.nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.nav a {
  color: var(--dim);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 999px;
  transition: color .15s, background .15s;
}
.nav a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav a.nav-cta {
  color: var(--accent-ink);
  font-weight: 600;
  background: linear-gradient(135deg, #8f7bff, #7a5cff);
  box-shadow: 0 4px 18px rgba(143,123,255,0.35), inset 0 1px 0 rgba(255,255,255,0.25);
}
.nav a.nav-cta:hover { color: var(--accent-ink); background: linear-gradient(135deg, #a08dff, #8a6bff); }

/* ================= HERO ================= */
.hero { padding: 90px 0 70px; text-align: center; }
.hero-inner { max-width: 780px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 22px;
}
.hero h1 {
  font-size: 56px;
  line-height: 1.08;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin-bottom: 20px;
}
.hero h1 .accent {
  color: var(--accent);
  text-shadow: 0 0 40px rgba(143,123,255,0.4);
}
.hero-sub {
  font-size: 17px;
  line-height: 1.7;
  color: var(--dim);
  max-width: 620px;
  margin: 0 auto 34px;
}
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.cta {
  display: inline-block;
  font: inherit;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--accent-ink);
  text-decoration: none;
  background: linear-gradient(135deg, #8f7bff 0%, #7a5cff 100%);
  padding: 14px 34px;
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(143,123,255,0.35), inset 0 1px 0 rgba(255,255,255,0.25);
  transition: transform .15s ease, box-shadow .15s ease;
}
.cta:hover { transform: translateY(-1px); box-shadow: 0 14px 38px rgba(143,123,255,0.45), inset 0 1px 0 rgba(255,255,255,0.25); }
.cta:active { transform: translateY(0); }
.cta:focus-visible { outline: 2px solid var(--accent2); outline-offset: 3px; }
.cta.secondary {
  background: rgba(255,255,255,0.05);
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.10);
}
.cta.secondary:hover { border-color: rgba(143,123,255,.6); color: #c3b8ff; }
.hero-note {
  margin-top: 22px;
  font-size: 12.5px;
  color: var(--faint);
  font-family: var(--font-mono);
}

/* ================= SECTIONS ================= */
.section { padding: 70px 0; }
.section-title {
  text-align: center;
  font-size: 32px;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: var(--faint);
  font-size: 14.5px;
  max-width: 560px;
  margin: 0 auto 44px;
  line-height: 1.6;
}

/* -------- feature cards -------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 900px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .feature-grid { grid-template-columns: 1fr; } }
.feature-card {
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  backdrop-filter: blur(12px) saturate(130%);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 18px;
  padding: 26px 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.05);
  transition: transform .15s ease, border-color .15s ease;
}
.feature-card:hover { transform: translateY(-2px); border-color: rgba(143,123,255,0.35); }
.feature-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 13.5px; line-height: 1.65; color: var(--dim); }
.feature-card.link { display: block; text-decoration: none; color: var(--text); }
.feature-card.link .go { display: inline-block; margin-top: 12px; font-size: 13px; font-weight: 600; color: var(--accent); }
.feature-card.link:hover .go { color: #c3b8ff; }

/* small "page" hero (features/about/download) */
.hero.hero-page { padding: 60px 0 34px; }
.hero-page h1 { font-size: 42px; }
.hero-page .hero-sub { margin-bottom: 0; }

/* ---------- download page ---------- */
.dl-card {
  max-width: 760px; margin: 0 auto; text-align: center;
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  backdrop-filter: blur(12px) saturate(130%);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 22px;
  padding: 44px 40px;
  box-shadow: 0 18px 54px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.05);
}
.dl-facts {
  list-style: none; margin-top: 18px; text-align: left;
  display: grid; grid-template-columns: 1fr; gap: 10px;
}
.dl-facts li { font-size: 13.5px; line-height: 1.6; color: var(--dim); }
.dl-facts code {
  font-family: var(--font-mono); font-size: 12.5px;
  background: rgba(255,255,255,0.06); padding: 1px 6px; border-radius: 6px;
}
.dl-facts a { color: var(--accent); }

/* ---------- changelog ---------- */
.cl-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.cl-item {
  display: flex; gap: 14px; align-items: baseline;
  background: rgba(15,21,40,0.55);
  border: 1px solid var(--border-soft); border-radius: 12px;
  padding: 12px 16px; font-size: 13.5px;
}
.cl-ver { font-family: var(--font-mono); font-weight: 700; color: var(--gold); white-space: nowrap; }
.cl-date { font-family: var(--font-mono); font-size: 12px; color: var(--faint); white-space: nowrap; }
.cl-sum { color: var(--dim); line-height: 1.55; }
@media (max-width: 560px) {
  .cl-item { flex-wrap: wrap; gap: 4px 12px; }
  .cl-sum { flex-basis: 100%; }
  .dl-card { padding: 30px 20px; }
}

/* -------- stats -------- */
.stats { padding: 20px 0 80px; }
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: center;
}
@media (max-width: 720px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }
.stat {
  background: rgba(15,21,40,0.55);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  padding: 24px 12px;
}
.stat b {
  display: block;
  font-size: 34px;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  text-shadow: 0 0 26px rgba(143,123,255,0.35);
}
.stat span { font-size: 12.5px; color: var(--faint); }

/* -------- CTA band -------- */
.cta-band {
  text-align: center;
  background: color-mix(in srgb, var(--panel) 62%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 26px;
  padding: 60px 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 80px rgba(143,123,255,0.08), inset 0 1px 0 rgba(255,255,255,0.06);
}
.cta-band h2 { font-size: 34px; margin-bottom: 12px; }
.cta-band p { color: var(--dim); margin-bottom: 30px; font-size: 15px; }

/* ================= FOOTER ================= */
.site-footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 26px 0 34px;
  margin-top: 30px;
}
.foot-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--faint);
}
.foot-credits {
  margin-top: 10px;
  font-size: 11.5px;
  color: var(--faint);
  text-align: center;
  line-height: 1.6;
}
.foot-credits a { color: var(--dim); text-decoration: none; }
.foot-credits a:hover { color: var(--accent); }
.foot-links a { color: var(--dim); text-decoration: none; }
.foot-links a:hover { color: var(--accent); }
.foot-desktop { opacity: .85; }

/* ---------- download section ---------- */
.download-wrap { max-width: 880px; }
.download-wrap .cta-band p { max-width: 46ch; margin-left: auto; margin-right: auto; }

/* ---------- legal pages (imprint / privacy) ---------- */
.legal { padding: 60px 0 40px; }
.legal-body {
  max-width: 760px;
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  backdrop-filter: blur(12px) saturate(130%);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 20px;
  padding: 44px 46px;
  box-shadow: 0 18px 50px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.05);
}
.legal-body h1 { font-size: 30px; margin-bottom: 6px; }
.legal-body h2 { font-size: 17px; margin: 26px 0 10px; color: var(--accent); }
.legal-body p, .legal-body li {
  font-size: 14px; line-height: 1.7; color: var(--dim); margin-bottom: 8px;
}
.legal-body ul { padding-left: 20px; }
.legal-body code {
  font-family: var(--font-mono); font-size: 13px;
  background: rgba(255,255,255,0.06); padding: 1px 6px; border-radius: 6px;
}
.legal-body a { color: var(--accent); }
@media (max-width: 640px) { .legal-body { padding: 30px 22px; } }

/* ================= SMALL SCREENS ================= */
@media (max-width: 760px) {
  .hero { padding: 64px 0 50px; }
  .hero h1 { font-size: 38px; }
  .section { padding: 50px 0; }
  .section-title { font-size: 26px; }
  .cta-band { padding: 44px 22px; }
  .nav a { padding: 7px 10px; font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}