:root {
  color-scheme: dark;
  --ink: #e8eef8;
  --muted: #94a3b8;
  --quiet: #64748b;
  --line: rgba(148, 163, 184, 0.16);
  --panel: rgba(15, 23, 42, 0.72);
  --accent: #5eead4;
  --accent-blue: #60a5fa;
  --bg: #070b14;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(37, 99, 235, 0.14), transparent 33rem),
    radial-gradient(circle at 85% 22%, rgba(20, 184, 166, 0.09), transparent 28rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image: linear-gradient(rgba(148, 163, 184, .1) 1px, transparent 1px), linear-gradient(90deg, rgba(148, 163, 184, .1) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}

a { color: inherit; }

.page-shell {
  position: relative;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #f8fafc;
  font-size: .9rem;
  font-weight: 750;
  letter-spacing: .18em;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  grid-template-columns: repeat(3, 3px);
  align-items: end;
  gap: 3px;
  width: 15px;
  height: 16px;
}

.brand-mark span { display: block; border-radius: 2px; background: var(--accent); }
.brand-mark span:nth-child(1) { height: 6px; opacity: .45; }
.brand-mark span:nth-child(2) { height: 11px; opacity: .72; }
.brand-mark span:nth-child(3) { height: 16px; }

nav { display: flex; gap: 30px; }
nav a { color: var(--muted); font-size: .86rem; text-decoration: none; transition: color .2s ease; }
nav a:hover, nav a:focus-visible { color: var(--ink); }

.hero {
  display: grid;
  grid-template-columns: 1.03fr .97fr;
  gap: clamp(50px, 8vw, 104px);
  align-items: center;
  min-height: 690px;
  padding: 88px 0 96px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .19em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 28px; font-size: clamp(3.25rem, 6vw, 6rem); line-height: .98; letter-spacing: -.058em; font-weight: 690; }
h2 { margin-bottom: 18px; font-size: clamp(2rem, 3.5vw, 3.3rem); line-height: 1.08; letter-spacing: -.038em; }
h3 { color: #f1f5f9; font-size: 1.05rem; line-height: 1.35; }

.hero-intro { max-width: 610px; margin-bottom: 34px; color: var(--muted); font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 46px; padding: 0 20px; border: 1px solid var(--line); border-radius: 8px; font-size: .84rem; font-weight: 700; text-decoration: none; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { border-color: transparent; color: #06111a; background: var(--accent); }
.button.secondary { background: rgba(15, 23, 42, .56); }

.signal-card { padding: 26px; border: 1px solid var(--line); border-radius: 16px; background: linear-gradient(145deg, rgba(15, 23, 42, .86), rgba(8, 15, 28, .72)); box-shadow: 0 30px 90px rgba(0, 0, 0, .3); }
.signal-topline { display: flex; align-items: center; gap: 10px; color: #cbd5e1; font-size: .82rem; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px rgba(94, 234, 212, .1), 0 0 18px rgba(94, 234, 212, .45); }
.signal-plot { padding: 36px 0 20px; }
.signal-plot svg { display: block; width: 100%; overflow: visible; }
.grid-lines path { fill: none; stroke: rgba(148, 163, 184, .12); stroke-width: 1; }
.plot-shadow { fill: none; stroke: rgba(94, 234, 212, .13); stroke-width: 14; }
.plot-line { fill: none; stroke: url(#lineGlow); stroke-width: 3; }
.signal-plot circle { fill: var(--accent-blue); stroke: rgba(96, 165, 250, .2); stroke-width: 10; }
.signal-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 0; padding-top: 20px; border-top: 1px solid var(--line); }
.signal-meta div { min-width: 0; }
.signal-meta dt { color: var(--quiet); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; }
.signal-meta dd { margin: 4px 0 0; overflow: hidden; color: #dbeafe; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .76rem; text-overflow: ellipsis; white-space: nowrap; }

.section { padding: 112px 0; border-top: 1px solid var(--line); }
.section-heading { max-width: 690px; margin-bottom: 56px; }
.section-heading.compact { margin-bottom: 40px; }
.section-heading > p:last-child { color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-grid article { min-height: 250px; padding: 28px; border: 1px solid var(--line); border-radius: 12px; background: rgba(15, 23, 42, .48); }
.feature-number { display: block; margin-bottom: 52px; color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .72rem; }
.feature-grid p, .notes-list p { color: var(--muted); font-size: .9rem; }

.notes-section { display: grid; grid-template-columns: .72fr 1.28fr; gap: 80px; }
.notes-list { border-top: 1px solid var(--line); }
.notes-list article { display: grid; grid-template-columns: 112px 1fr; column-gap: 24px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.notes-list .note-label { grid-row: 1 / span 2; color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
.notes-list h3 { margin-bottom: 8px; }
.notes-list p:last-child { margin-bottom: 0; }

.status-panel { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--panel); }
.status-summary { display: flex; align-items: center; gap: 16px; padding: 24px 28px; border-bottom: 1px solid var(--line); }
.status-summary div { display: flex; flex-direction: column; }
.status-summary strong { font-size: .95rem; }
.status-summary span:last-child { color: var(--muted); font-size: .78rem; }
.status-items { display: grid; grid-template-columns: repeat(3, 1fr); }
.status-items div { display: flex; justify-content: space-between; gap: 16px; padding: 22px 28px; border-right: 1px solid var(--line); }
.status-items div:last-child { border: 0; }
.status-items span { color: var(--muted); font-size: .82rem; }
.status-items strong { color: #d1fae5; font-size: .78rem; }

footer { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; padding: 54px 0 64px; border-top: 1px solid var(--line); color: var(--quiet); font-size: .78rem; }
.footer-brand { margin-bottom: 12px; }
footer p { margin-bottom: 0; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .signal-card { max-width: 650px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: auto; }
  .feature-number { margin-bottom: 28px; }
  .notes-section { grid-template-columns: 1fr; gap: 8px; }
  .status-items { grid-template-columns: 1fr; }
  .status-items div { border-right: 0; border-bottom: 1px solid var(--line); }
}

@media (max-width: 620px) {
  .page-shell { width: min(100% - 28px, 1180px); }
  .site-header { min-height: 70px; }
  nav { gap: 16px; }
  nav a:nth-child(2) { display: none; }
  .hero { padding: 72px 0 80px; gap: 54px; }
  h1 { font-size: clamp(3rem, 16vw, 4.8rem); }
  .signal-card { padding: 20px; }
  .signal-meta { grid-template-columns: 1fr 1fr; }
  .signal-meta div:last-child { display: none; }
  .section { padding: 84px 0; }
  .notes-list article { grid-template-columns: 1fr; }
  .notes-list .note-label { grid-row: auto; margin-bottom: 12px; }
  footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}