:root {
  --paper: #f4f2ed;
  --paper-2: #ebe8e0;
  --ink: #14161a;
  --ink-2: #4a4f59;
  --muted: #6b7080;
  --line: #dcd7cc;
  --amber: #f5c542;
  --amber-ink: #1a1500;
  --amber-deep: #9a7410;
  --amber-soft: rgba(245, 197, 66, .12);
  --green: #1f6b4a;
  --dark: #0f1115;
  --dark-2: #1a1e26;
  --dark-3: #222733;
  --dark-line: #2a303b;
  --dark-line-2: #3a4250;
  --dark-text: #f2f0eb;
  --dark-muted: #9aa1ad;
  --dark-dim: #6b7280;
  --radius: 14px;
  --serif: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, Menlo, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.55 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
img { max-width: 100%; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* Banner + nav */
.banner { background: var(--amber); color: var(--amber-ink); text-align: center; font-weight: 500; padding: 10px 16px; font-size: 15px; border-bottom: 6px solid transparent; border-image: repeating-linear-gradient(90deg, var(--ink) 0 6px, var(--amber) 6px 12px) 6; }
.banner a { text-decoration: none; }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; gap: 16px; }
.logo { font: 800 24px/1 var(--sans); letter-spacing: 0.04em; text-decoration: none; }
.logo span { color: var(--green); }
.nav-left { display: flex; align-items: center; gap: 20px; }
.nav-tag { font-size: 13px; color: var(--ink-2); display: flex; align-items: center; gap: 8px; }
.nav-tag::before { content: ""; width: 7px; height: 7px; background: var(--amber); display: inline-block; }
.nav-right { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav-right a.plain { text-decoration: none; color: var(--ink-2); }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 12px 20px; border-radius: 10px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); text-decoration: none; font: 500 15px var(--sans); cursor: pointer; transition: transform .12s ease, background .12s ease; }
.btn:hover { transform: translateY(-1px); }
.btn.ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn.small { padding: 9px 14px; font-size: 14px; }

/* Hero */
.hero { text-align: center; padding: 64px 0 0; }
.hero h1 { font: 300 clamp(40px, 6.4vw, 76px)/1.05 var(--serif); letter-spacing: -0.04em; margin: 0 auto 22px; max-width: 900px; }
.hero p.lede { font-size: 19px; color: var(--ink-2); margin: 0 auto 30px; max-width: 640px; }
.hero p.lede b { color: var(--ink); }
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.pixels { display: grid; grid-template-columns: repeat(48, 1fr); gap: 0; margin-top: 56px; height: 120px; align-items: end; }
.pixels i { display: block; width: 100%; }

/* Sections */
section.block { padding: 88px 0; border-top: 1px solid var(--line); }
.eyebrow { font: 500 12px var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--amber-deep); margin-bottom: 14px; }
h2 em { font-style: normal; color: var(--amber-deep); }
h2 { font: 300 clamp(30px, 4vw, 48px)/1.08 var(--serif); letter-spacing: -0.035em; margin: 0 0 18px; max-width: 760px; }
.sub { color: var(--ink-2); font-size: 18px; max-width: 680px; margin: 0 0 40px; }

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.card h3 { margin: 0 0 8px; font: 500 20px var(--sans); letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--ink-2); }
.card .tag { display: inline-block; font: 500 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; padding: 5px 9px; border-radius: 6px; margin-bottom: 14px; }
.tag.good { background: #e3f1e9; color: var(--green); }
.tag.weak { background: var(--paper-2); color: var(--muted); }
.card ul { margin: 14px 0 0; padding-left: 18px; color: var(--ink-2); }

.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.cat h4 { margin: 0 0 6px; font: 500 16px var(--sans); }
.cat p { margin: 0 0 12px; font-size: 14px; color: var(--ink-2); }
.cat .chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: 500 11px var(--mono); letter-spacing: .04em; padding: 4px 8px; border-radius: 6px; background: var(--paper); border: 1px solid var(--line); color: var(--ink-2); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: s; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; position: relative; }
.step::before { counter-increment: s; content: "0" counter(s); font: 500 13px var(--mono); color: var(--muted); display: block; margin-bottom: 18px; }
.step h3 { margin: 0 0 8px; font: 500 20px var(--sans); letter-spacing: -0.01em; }
.step p { margin: 0; color: var(--ink-2); }

.formula { background: var(--dark); color: var(--dark-text); border-radius: var(--radius); padding: 36px; display: grid; grid-template-columns: 1.1fr 1fr; gap: 36px; }
.formula code { font: 500 clamp(16px, 2vw, 22px)/1.5 var(--mono); color: var(--amber); display: block; margin: 8px 0 18px; }
.formula h3 { margin: 0; font: 500 18px var(--sans); }
.formula p, .formula li { color: var(--dark-muted); font-size: 15px; }
.formula ul { padding-left: 18px; margin: 8px 0 0; }
.formula b { color: var(--dark-text); }

.band { background: var(--ink); color: var(--paper); padding: 22px 0; overflow: hidden; white-space: nowrap; font: 600 18px var(--sans); }
.band span { margin-right: 48px; }
.band span::before { content: "\25A0  "; color: var(--amber); }

.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq summary { cursor: pointer; font: 500 18px var(--sans); letter-spacing: -0.01em; list-style: none; }
.faq summary::after { content: "+"; float: right; color: var(--muted); }
.faq details[open] summary::after { content: "–"; }
.faq p { color: var(--ink-2); margin: 10px 0 0; max-width: 760px; }

.final { text-align: center; }
.final h2 { margin: 0 auto 14px; }
.final .sub { margin: 0 auto 28px; }

footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
footer a { text-decoration: none; margin-right: 18px; }

@media (max-width: 880px) {
  .compare, .steps, .formula { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .nav-tag, .nav-right a.plain { display: none; }
  .pixels { grid-template-columns: repeat(24, 1fr); height: 80px; }
}
@media (max-width: 520px) {
  .wrap { padding: 0 16px; }
  .grid-4 { grid-template-columns: 1fr; }
  section.block { padding: 64px 0; }
  .formula { padding: 24px; }
}