:root {
  --bg: #fff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --soft: #f5f5f7;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 720px; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.85);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,.08);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 24px;
  height: 48px; display: flex; align-items: center; justify-content: space-between;
}
.logo { font-weight: 600; letter-spacing: -.02em; font-size: 19px; }
.nav nav { display: flex; gap: 24px; font-size: 13px; }
.nav nav a { color: var(--muted); transition: color .2s; }
.nav nav a:hover { color: var(--fg); }

/* Hero */
.hero {
  min-height: calc(100vh - 48px); min-height: calc(100svh - 48px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 64px 24px;
}
.wordmark {
  margin: 0;
  font-size: clamp(72px, 18vw, 192px);
  font-weight: 700; letter-spacing: -.05em; line-height: 1;
}
.tagline {
  margin: 24px 0 0;
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 600; letter-spacing: -.02em;
}
.sub { margin: 16px 0 0; max-width: 520px; font-size: clamp(17px, 2vw, 21px); color: var(--muted); }
.btn {
  margin-top: 32px; display: inline-block;
  background: var(--fg); color: #fff;
  padding: 12px 24px; border-radius: 980px; font-size: 17px;
  transition: opacity .2s;
}
.btn:hover { opacity: .8; }

/* Sections */
.section { padding: clamp(80px, 12vw, 140px) 0; scroll-margin-top: 48px; }
.eyebrow { margin: 0 0 12px; font-size: 14px; font-weight: 600; color: var(--muted); letter-spacing: .02em; }
h2 { margin: 0; font-size: clamp(32px, 5.5vw, 56px); line-height: 1.1; letter-spacing: -.03em; font-weight: 700; }
.lead { margin: 24px 0 0; max-width: 640px; font-size: clamp(18px, 2.2vw, 24px); line-height: 1.4; color: var(--muted); }
h3 { margin: 0 0 8px; font-size: 21px; letter-spacing: -.01em; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 56px; }
.card { background: var(--soft); border-radius: 24px; padding: 32px; }
.card p { margin: 0; color: var(--muted); font-size: 17px; }

.dark { background: #000; color: #f5f5f7; }
.dark .eyebrow, .dark .lead { color: #a1a1a6; }
.note {
  margin: 40px 0 0; display: inline-block;
  padding: 8px 16px; border: 1px solid #424245; border-radius: 980px;
  font-size: 14px; color: #a1a1a6;
}

.founder { margin: 48px 0 0; display: flex; flex-direction: column; gap: 2px; padding-top: 24px; border-top: 1px solid var(--line); }
.founder strong { font-size: 19px; }
.founder span { color: var(--muted); font-size: 15px; }

.contact { background: var(--soft); text-align: center; }
.contact .lead { margin-left: auto; margin-right: auto; }
.mail {
  display: inline-block; margin-top: 32px;
  font-size: clamp(22px, 4vw, 36px); font-weight: 600; letter-spacing: -.02em;
  border-bottom: 2px solid var(--fg); padding-bottom: 2px;
}
.mail:hover { opacity: .7; }

footer { padding: 24px 0; font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); }
.foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.foot .logo { font-size: 15px; color: var(--fg); }

@media (max-width: 734px) {
  .grid { grid-template-columns: 1fr; margin-top: 40px; }
  .nav nav { gap: 16px; }
  .nav nav a:first-child { display: none; }
}
a:focus-visible, .btn:focus-visible { outline: 2px solid #0071e3; outline-offset: 3px; }