:root {
  --paper: #ffffff;
  --ink: #0a0a0a;
  --muted: #6b6b6b;
  --body: #3a3a3a;
  --soft: #f4f4f2;
  --line: #e3e3df;
  --max: 1180px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-left: clamp(1.5rem, 5vw, 3.5rem);
  padding-right: clamp(1.5rem, 5vw, 3.5rem);
}

.mono,
.label,
.btn,
.link-arrow {
  font-family: var(--mono);
}

.label {
  margin: 0 0 1.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--paper);
}

a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: 76px;
}

.brand { display: inline-flex; text-decoration: none; }
.brand img {
  height: 46px;
  width: auto;
  mix-blend-mode: multiply;
}

.site-nav {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
}

.site-nav a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.5rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 0.73rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease;
}
.btn:hover { background: transparent; color: var(--ink); }

.btn-small {
  padding: 0.65rem 1rem;
  font-size: 0.67rem;
  margin-left: 0.25rem;
}

.btn-large { padding: 1.05rem 2rem; font-size: 0.76rem; }

.btn-invert {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}
.btn-invert:hover { background: transparent; color: var(--paper); }

/* Hero */

.hero {
  padding-top: clamp(3.5rem, 8vw, 7rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: end;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 7.6vw, 6.4rem);
  line-height: 0.94;
  letter-spacing: -0.045em;
  font-weight: 600;
  text-wrap: balance;
}

.stroke {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
  text-stroke: 1.5px var(--ink);
}

.hero-aside { max-width: 34ch; justify-self: end; }

.lede {
  margin: 0 0 2rem;
  font-size: 1.05rem;
  color: var(--body);
}

.actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.link-arrow {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid var(--ink);
}
.link-arrow:hover { color: var(--muted); border-bottom-color: var(--muted); }

.fineprint {
  margin: 1.75rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  max-width: 38ch;
}

/* Name strip */

.strip {
  background: var(--soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.strip-inner {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.9rem clamp(1rem, 3vw, 2.5rem);
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.strip-item { display: flex; align-items: baseline; gap: 0.7rem; margin: 0; }
.strip-key {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.strip-desc { font-size: 0.8rem; color: var(--muted); }
.strip-op { margin: 0; font-family: var(--mono); color: #b6b6b0; }
.strip-item--final .strip-key { text-decoration: underline; text-underline-offset: 5px; }

/* Sections */

.section {
  padding: clamp(4rem, 9vw, 7.5rem) 0;
  border-bottom: 1px solid var(--line);
}

.section-head { max-width: 780px; margin-bottom: clamp(2.5rem, 5vw, 4rem); }

h2 {
  margin: 0;
  font-size: clamp(1.9rem, 3.8vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  font-weight: 600;
  text-wrap: balance;
}

.body { max-width: 52ch; color: var(--body); }

/* Features */

.features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feature {
  padding: clamp(1.6rem, 3vw, 2.6rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature-num {
  margin: 0 0 2.5rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.feature h3 {
  margin: 0 0 0.6rem;
  font-size: 1.16rem;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.feature p:last-child { margin: 0; color: var(--body); font-size: 0.95rem; }

/* Steps */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3vw, 2.75rem);
  margin: 0;
  padding: clamp(1.75rem, 3vw, 2.25rem) 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.step-num {
  margin: 0 0 1.75rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.step h3 { margin: 0 0 0.5rem; font-size: 1.1rem; font-weight: 600; }
.step p:last-child { margin: 0; color: var(--body); font-size: 0.93rem; }

/* Split + code */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.code {
  margin: 0;
  background: var(--soft);
  border: 1px solid var(--line);
}

.code figcaption {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.code pre {
  margin: 0;
  padding: 1.4rem 1.25rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.9;
  color: #2b2b2b;
}

.code .c { color: #8f8f89; }

/* Signup */

.signup {
  padding: clamp(4rem, 9vw, 7rem) 0;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid var(--ink);
}

.signup .label { color: #9a9a94; }
.signup h2 { max-width: 20ch; }

.signup-copy {
  margin: 1.5rem 0 2.5rem;
  max-width: 48ch;
  color: #c7c7c0;
}

.signup-fine {
  margin: 1.5rem 0 0;
  font-size: 0.8rem;
  color: #94948e;
}
.signup-fine .mono { color: var(--paper); }

/* FAQ */

.faq-wrap {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.faq { border-top: 1px solid var(--line); }

.faq details { border-bottom: 1px solid var(--line); }

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 1.05rem;
  color: var(--muted);
}
.faq details[open] summary::after { content: "–"; }

.faq details p {
  margin: 0 0 1.3rem;
  max-width: 62ch;
  font-size: 0.95rem;
  color: #4a4a4a;
}

/* Footer */

.site-footer { padding: 3.25rem 0 2.5rem; }

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-brand {
  margin: 0 0 0.55rem;
  font-size: 1rem;
  letter-spacing: 0.3em;
}
.footer-note { margin: 0; font-size: 0.84rem; color: var(--muted); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.footer-meta a { color: var(--ink); text-decoration: none; }
.footer-meta a:hover { text-decoration: underline; }

.footer-legal {
  margin-top: 2.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}
.footer-legal p { margin: 0; font-size: 0.72rem; color: #9a9a94; }

/* Responsive */

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-aside { justify-self: start; max-width: 46ch; }
  .split,
  .faq-wrap { grid-template-columns: 1fr; }
  .site-nav { display: none; }
  .header-inner { justify-content: space-between; }
  .btn-small { margin-left: auto; }
}

@media (max-width: 760px) {
  .features { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 2rem; }
  .step-num { margin-bottom: 0.75rem; }
}

@media (max-width: 520px) {
  .brand img { height: 38px; }
  .strip-desc { display: none; }
  .actions { align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; }
}

@media print {
  .site-header { position: static; }
  .site-nav, .skip-link { display: none; }
}