html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Nav === */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 72rem; margin: 0 auto;
  height: 56px;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
  border-bottom: 1px solid var(--pl-border);
}
.nav-brand {
  font-weight: 700; font-size: 1.05rem;
  color: var(--pl-text); text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a {
  font-size: 0.85rem; font-weight: 500;
  color: var(--pl-muted); text-decoration: none;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--pl-text); }

/* === Hero === */
.hero {
  padding: clamp(4rem, 10vw, 7rem) clamp(1.25rem, 4vw, 2rem) clamp(3rem, 6vw, 5rem);
  max-width: 72rem; margin: 0 auto;
}
.hero-content {
  display: grid; gap: 2.5rem;
}
@media (min-width: 52rem) {
  .hero-content { grid-template-columns: 1.15fr 0.85fr; align-items: start; }
}
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.25rem);
  font-weight: 800; line-height: 1.06;
  letter-spacing: -0.035em;
  margin: 0 0 1.25rem;
  max-width: 18ch;
}
.hero-sub {
  font-size: 1.08rem; line-height: 1.65;
  color: var(--pl-muted);
  max-width: 50ch; margin: 0 0 2rem;
}
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.hero-proof {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-top: 2.5rem;
}
.hero-proof span {
  font-size: 0.78rem; color: var(--pl-muted);
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--pl-border); border-radius: var(--pl-radius);
}

/* === Hero console === */
.hero-console {
  background: #111827; border-radius: var(--pl-radius-lg);
  padding: 1.25rem 1.5rem; color: #fff;
}
.console-head {
  font-size: 0.62rem; color: rgba(255,255,255,0.3);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.console-row {
  display: grid; grid-template-columns: 1fr auto auto;
  gap: 1.5rem; padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.6); font-size: 0.82rem;
}
.console-row strong { color: #fff; }
.console-header {
  font-size: 0.62rem; color: rgba(255,255,255,0.28);
  text-transform: uppercase; letter-spacing: 0.04em;
  border-bottom-color: rgba(255,255,255,0.1);
}
.console-foot {
  font-size: 0.68rem; color: rgba(255,255,255,0.25);
  margin-top: 0.75rem;
}

/* === Sections === */
.section {
  padding: clamp(3rem, 6vw, 5rem) clamp(1.25rem, 4vw, 2rem);
  max-width: 72rem; margin: 0 auto;
}
.section-heading {
  font-size: clamp(1.2rem, 2.5vw, 1.4rem);
  font-weight: 700; letter-spacing: -0.02em;
  margin: 0 0 2rem;
}

/* === How it works === */
.flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem;
}
.flow-num {
  font-size: 0.7rem; color: var(--pl-accent);
  letter-spacing: 0.04em; display: block;
  margin-bottom: 0.45rem;
}
.flow-step h3 { font-size: 0.95rem; font-weight: 600; margin: 0 0 0.35rem; }
.flow-step p { font-size: 0.88rem; color: var(--pl-muted); margin: 0; line-height: 1.55; }

/* === Dark model section === */
.section-dark {
  background: #111827;
  padding: clamp(3rem, 6vw, 5rem) clamp(1.25rem, 4vw, 2rem);
  color: #fff;
}
.model-inner {
  max-width: 72rem; margin: 0 auto;
  display: grid; gap: 3rem; align-items: start;
}
@media (min-width: 52rem) {
  .model-inner { grid-template-columns: 1.1fr 0.9fr; gap: 4rem; }
}

.model-explain h2 {
  font-size: clamp(1.2rem, 2.5vw, 1.4rem);
  font-weight: 700; letter-spacing: -0.02em;
  margin: 0 0 0.75rem; color: #fff;
}
.model-explain > p {
  font-size: 0.9rem; color: rgba(255,255,255,0.55);
  margin: 0 0 1.75rem; line-height: 1.6;
}
.model-rules { display: grid; gap: 1.25rem; }
.rule {
  display: grid; grid-template-columns: auto 1fr;
  gap: 0.4rem 1rem; align-items: start;
  padding-left: 0.75rem;
  border-left: 2px solid rgba(255,255,255,0.08);
}
.rule-multiplier {
  font-size: 1.1rem; font-weight: 600;
  color: #a5b4fc;
  grid-row: span 2; align-self: center;
}
.rule strong { font-size: 0.9rem; color: #fff; }
.rule span { font-size: 0.82rem; color: rgba(255,255,255,0.4); line-height: 1.45; }

/* === Example table === */
.model-example {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--pl-radius-lg); padding: 1rem;
}
.example-head {
  font-size: 0.65rem; color: rgba(255,255,255,0.3);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.ex-row {
  display: grid; grid-template-columns: 1.1fr 0.7fr 1.3fr 1fr 0.8fr;
  gap: 0.4rem; padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.78rem; color: rgba(255,255,255,0.6);
}
.ex-header {
  font-size: 0.62rem; color: rgba(255,255,255,0.28);
  text-transform: uppercase; letter-spacing: 0.04em;
  border-bottom-color: rgba(255,255,255,0.08);
}
.ex-footer {
  border-bottom: none; border-top: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.8); font-weight: 500;
}

/* === Features === */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.feature h3 { font-size: 0.92rem; font-weight: 600; margin: 0 0 0.3rem; }
.feature p { font-size: 0.85rem; color: var(--pl-muted); margin: 0; line-height: 1.55; }

/* === CTA === */
.cta-block { text-align: center; border-top: 1px solid var(--pl-border); }
.cta-block h2 {
  font-size: clamp(1.2rem, 2.5vw, 1.4rem);
  font-weight: 700; letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}
.cta-block p { color: var(--pl-muted); margin: 0 0 1.5rem; font-size: 0.92rem; }

/* === Footer === */
.footer {
  max-width: 72rem; margin: 0 auto;
  padding: 1.5rem clamp(1.25rem, 4vw, 2rem);
  border-top: 1px solid var(--pl-border);
}
.footer-inner {
  display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 1rem;
  font-size: 0.78rem; color: var(--pl-muted);
}
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { color: var(--pl-muted); text-decoration: none; transition: color 0.15s; }
.footer-links a:hover { color: var(--pl-text); }

/* === Responsive === */
@media (max-width: 48rem) {
  .nav-links a:not(.btn) { display: none; }
  .hero { padding-top: 3rem; }
  .hero h1 { font-size: 2rem; }
  .nav { flex-wrap: wrap; gap: 0.5rem; }
}