/* seonix — clean technical marketing aesthetic. Vanilla CSS, no framework. */

* {
  box-sizing: border-box;
}

:root {
  --bg: #0d1117;
  --bg-alt: #131a24;
  --panel: #161e2b;
  --ink: #e6edf3;
  --quiet: #9aa7b4;
  --rule: #243140;
  --accent: #4cc2c4;
  --accent-2: #7ee0a8;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max: 64rem;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
a.ext {
  color: var(--quiet);
}
a.ext:hover {
  color: var(--accent);
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
}

/* ---------- header ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  max-width: var(--max);
  margin: 0 auto;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.brand:hover {
  text-decoration: none;
  color: var(--accent);
}
.header-nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}
.header-nav a {
  color: var(--quiet);
}
.header-nav a:hover {
  color: var(--accent);
}

/* ---------- hero ---------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 1.5rem 3rem;
  text-align: center;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 1.1rem;
}
.lede {
  font-size: 1.18rem;
  color: var(--quiet);
  max-width: 42rem;
  margin: 0 auto 2.2rem;
}
.lede code {
  color: var(--ink);
}

.headline-stats {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 0 auto 2.4rem;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.2rem 1.5rem;
  min-width: 12rem;
  flex: 1 1 12rem;
  max-width: 16rem;
}
.stat .num {
  display: block;
  font-family: var(--mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-2);
  line-height: 1;
}
.stat .cap {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--quiet);
}

.cta-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.cta-secondary {
  font-weight: 600;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 0.75rem 1.1rem;
  cursor: pointer;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1rem;
}
.copy-btn:hover {
  background: var(--bg-alt);
}
.copy-btn .copy-hint {
  font-family: var(--sans);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  border-left: 1px solid var(--rule);
  padding-left: 0.9rem;
}
.copy-btn.copied {
  border-color: var(--accent-2);
}
.copy-btn.copied .copy-hint {
  color: var(--accent-2);
}
.copy-btn.big {
  font-size: 1.15rem;
  padding: 0.95rem 1.4rem;
}

.fineprint {
  font-size: 0.82rem;
  color: var(--quiet);
  max-width: 40rem;
  margin: 0 auto;
}

/* ---------- bands ---------- */
.band {
  border-top: 1px solid var(--rule);
  padding: 3.5rem 1.5rem;
}
.band.alt {
  background: var(--bg-alt);
}
.band > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}
.band h2 {
  font-size: 1.9rem;
  letter-spacing: -0.02em;
  margin: 0 0 1.6rem;
}
.band-lede {
  color: var(--quiet);
  font-size: 1.08rem;
  margin-top: -0.8rem;
  margin-bottom: 2rem;
  max-width: 44rem;
}

.how-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.25rem;
}
.how-steps li {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.4rem;
}
.how-steps h3 {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  color: var(--accent);
  font-size: 1.05rem;
}
.how-steps p {
  margin: 0;
  color: var(--quiet);
  font-size: 0.95rem;
}
.how-steps code,
.tune-grid code,
.lede code,
.band-lede code {
  color: var(--ink);
}

.quickstart {
  padding-left: 1.2rem;
  margin: 0;
}
.quickstart li {
  margin-bottom: 1.4rem;
}
.quickstart p {
  margin: 0 0 0.6rem;
}
pre {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 0;
}
pre code {
  color: var(--accent-2);
  font-size: 0.9rem;
  line-height: 1.55;
}

.tune-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.5rem 2rem;
}
.tune-grid h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--accent-2);
}
.tune-grid p {
  margin: 0;
  color: var(--quiet);
  font-size: 0.96rem;
}

/* ---------- viz ---------- */
.viz-frame {
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--panel);
  min-height: 24rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.viz-placeholder {
  color: var(--quiet);
  padding: 2rem;
  text-align: center;
}
.viz-iframe {
  width: 100%;
  height: 36rem;
  border: 0;
  display: block;
}

/* ---------- cta band + footer ---------- */
.cta-band {
  text-align: center;
}
.cta-band h2 {
  margin-bottom: 1.5rem;
}
.cta-band .copy-btn {
  margin: 0 auto;
}
.links-row {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--quiet);
  font-size: 0.88rem;
}
.footer-links {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }
  .hero {
    padding-top: 2.5rem;
  }
}