/* SharpSignals landing — token values mirror brand/IDENTITY.md */
:root {
  --bg-deep: #0d1117;
  --bg-elev: #161b22;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-muted: #8b949e;
  --accent-blue: #79c0ff;
  --accent-cyan: #56d4dd;
  --pos-green: #56d364;
  --neg-red: #f85149;
  --warn-yellow: #e3b341;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --max-w: 1080px;
  --pad-x: clamp(1.25rem, 4vw, 2.5rem);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-blue); text-decoration: none; }
a:hover { color: var(--accent-cyan); }

.mono { font-family: var(--font-mono); font-feature-settings: "tnum"; }

/* ---------- Nav ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem var(--pad-x);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.wordmark, .wordmark-sm {
  color: var(--accent-blue);
  font-weight: 700;
  letter-spacing: 0.06em;
}
.wordmark { font-size: 1.05rem; }
.wordmark-sm { font-size: 0.9rem; }

.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: var(--text-muted); font-size: 0.95rem; }
.nav-links a:hover { color: var(--text-primary); }

@media (max-width: 540px) { .nav-links { gap: 1rem; } .nav-links a { font-size: 0.85rem; } }

/* ---------- Sections ---------- */
main { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--pad-x); }

.section { padding: clamp(3rem, 8vw, 5rem) 0; border-top: 1px solid var(--border); }
.section h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  margin: 0 0 0.75rem;
  letter-spacing: -0.01em;
}
.section-lede { color: var(--text-muted); max-width: 60ch; margin: 0 0 2rem; }

/* ---------- Hero ---------- */
.hero {
  padding: clamp(3rem, 10vw, 6rem) 0 clamp(2rem, 6vw, 4rem);
  border-bottom: 1px solid var(--border);
}
.eyebrow {
  color: var(--accent-blue);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
}
.hero h1 {
  font-size: clamp(2.2rem, 6.5vw, 4rem);
  line-height: 1.05;
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.hero h1 .accent { color: var(--accent-blue); }
.hero .subhead {
  color: var(--text-muted);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  max-width: 60ch;
  margin: 0 0 2rem;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.5rem; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.1rem;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: background 120ms ease, border-color 120ms ease, transform 60ms ease;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent-blue);
  color: var(--bg-deep);
}
.btn-primary:hover { background: var(--accent-cyan); color: var(--bg-deep); }
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--accent-blue); color: var(--accent-blue); }
.btn:active { transform: translateY(1px); }

.meta-line {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 1rem 0 0;
}

/* ---------- Stats grid ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.stat-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.stat-value {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--accent-blue);
  font-weight: 500;
}
.stat-sub { color: var(--text-muted); font-size: 0.8rem; }

.sheet-callout {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}
.sheet-callout p { margin: 0; color: var(--text-muted); flex: 1 1 320px; }

/* ---------- Methodology ---------- */
.method-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
}
.method-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.method-list h3 { margin: 0 0 0.25rem; font-size: 1.1rem; }
.method-list p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }
.step {
  color: var(--accent-blue);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  align-self: start;
  padding-top: 0.15rem;
}

/* ---------- Don't list ---------- */
.dont-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.dont-list li {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  display: flex;
  gap: 0.6rem;
  font-size: 0.95rem;
}
.dont-list .x { color: var(--neg-red); font-weight: 700; }

/* ---------- Follow ---------- */
.follow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.follow-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--text-primary);
  transition: border-color 120ms ease, transform 80ms ease;
}
.follow-card:hover { border-color: var(--accent-blue); transform: translateY(-1px); }
.follow-platform { color: var(--text-muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
.follow-handle { color: var(--accent-blue); font-size: 1.2rem; }
.follow-desc { color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding: 2rem var(--pad-x) 3rem;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.footer-meta { color: var(--text-muted); font-size: 0.85rem; }
.disclaimer {
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.6;
  max-width: 80ch;
  margin: 0 0 1rem;
}
.copyright { color: var(--text-muted); font-size: 0.75rem; margin: 0; }

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