/* Type Two Development — a single-page introduction. No JavaScript. */
:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --text: #1a1d21;
  --text-muted: #5b6472;
  --border: #d9dee5;
  --accent: #1f6feb;
  --accent-contrast: #ffffff;
  --topo-ink: #1f6feb;
  --topo-opacity: 0.20;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --text: #e7ebf0;
    --text-muted: #97a1b0;
    --border: #2b323c;
    --accent: #4c8dff;
    --accent-contrast: #0b0f14;
    --topo-ink: #6ea6ff;
    --topo-opacity: 0.26;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  position: relative;
  isolation: isolate;
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
/* Preserve the original contour asset, ink, opacity and framing. */
.topo {
  position: absolute;
  inset: 0 0 auto;
  height: min(820px, 100%);
  overflow: hidden;
  pointer-events: none;
  z-index: -1;
}
.topo::before {
  content: "";
  position: absolute;
  inset: -8% -4%;
  background: var(--topo-ink);
  opacity: var(--topo-opacity);
  -webkit-mask-image: url("/topo.svg");
          mask-image: url("/topo.svg");
  -webkit-mask-size: cover;
          mask-size: cover;
  -webkit-mask-position: 50% 42%;
          mask-position: 50% 42%;
  -webkit-mask-repeat: no-repeat;
          mask-repeat: no-repeat;
}
.topo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 30%, var(--bg) 94%);
}
.lp-header {
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 48px;
}
.lp-brand { display: inline-flex; align-items: center; gap: 11px; font-size: 16px; font-weight: 650; letter-spacing: -.25px; }
.lp-brand-mark { width: 27px; height: 27px; color: var(--accent); flex: none; }
.lp-brand-light { color: var(--text-muted); font-weight: 450; }
main { max-width: 1144px; margin: 0 auto; padding: 0 48px 48px; }
.lp-hero { text-align: center; padding: clamp(58px, 9vh, 112px) 0 clamp(65px, 10vh, 120px); }
.lp-tagline { color: var(--accent); text-transform: uppercase; font-size: 11px; font-weight: 650; letter-spacing: .19em; margin: 0 0 26px; }
h1 { margin: 0; font-size: clamp(44px, 6.6vw, 80px); letter-spacing: -.055em; line-height: 1.06; font-weight: 600; text-wrap: balance; }
.lp-intro { margin: 26px auto 0; max-width: 470px; font-size: 17px; color: var(--text-muted); line-height: 1.7; text-wrap: pretty; }
.lp-contact { display: inline-flex; gap: 28px; align-items: center; padding: 13px 22px; margin-top: 32px; color: var(--accent-contrast); background: var(--accent); border: 1px solid var(--accent); border-radius: 7px; font-size: 14px; font-weight: 600; text-decoration: none; transition: filter .15s ease; }
.lp-contact:hover { filter: brightness(1.1); }
.lp-contact:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.lp-contact span { font-size: 18px; }
.lp-principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--border); padding-top: 29px; gap: 45px; }
.lp-number { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 10px; color: var(--accent); letter-spacing: .1em; }
.lp-principles h2 { margin: 13px 0 9px; font-size: 18px; line-height: 1.3; letter-spacing: -.025em; font-weight: 600; }
.lp-principles p { margin: 0; max-width: 30ch; font-size: 14px; color: var(--text-muted); line-height: 1.7; }
@media (max-width: 640px) {
  .lp-header { padding: 26px 24px; }
  .lp-brand { font-size: 14px; }
  main { padding: 0 24px 40px; }
  .lp-hero { padding: 54px 0 62px; }
  .lp-tagline { font-size: 9px; letter-spacing: .13em; margin-bottom: 24px; }
  h1 { font-size: clamp(38px, 9.5vw, 60px); }
  .lp-intro { font-size: 15px; max-width: 31ch; }
  .desktop-break { display: none; }
  .lp-contact { margin-top: 26px; }
  .lp-principles { grid-template-columns: 1fr; gap: 26px; padding-top: 25px; }
  .lp-principles article { position: relative; padding-left: 39px; }
  .lp-number { position: absolute; left: 0; top: 4px; }
  .lp-principles h2 { margin-top: 0; font-size: 17px; }
  .lp-principles p { max-width: 36ch; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) { .lp-contact { transition: none; } }