@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@500;600&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&display=swap");

:root {
  --ink: #121317;
  --paper: #fbfcff;
  --purple: #6d77f5;
  --coral: #ff8b72;
  --muted: #5f6470;
  --line: rgba(18, 19, 23, .12);
  --stale: #cf4a26;
  --valid: #1f7a5c;
  --nav-height: 86px;
  --page: min(1320px, calc(100vw - 72px));
  --mono: 600 11px/1 "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); }
body {
  min-width: 1024px;
  overflow-x: hidden;
  color: var(--ink);
  font-family: "Manrope", sans-serif;
  font-size: 17px;
  line-height: 1.5;
}

@media (max-width: 767px) {
  :root { --page: calc(100vw - 32px); --nav-height: 72px; }
  body { min-width: 0; }
}
a { color: inherit; text-decoration: none; }

/* ---- nav ---- */
.site-nav {
  position: fixed; top: 0; left: 50%; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  width: var(--page); min-height: var(--nav-height);
  transform: translateX(-50%);
  border-bottom: 1px solid #e5e7ec;
  background: rgba(251,252,255,.72);
  backdrop-filter: blur(20px);
  box-shadow: 0 0 0 100vmax rgba(251,252,255,.72);
  clip-path: inset(0 -100vmax);
}
.brand { font-size: 22px; font-weight: 600; letter-spacing: -.035em; }
.nav-links { display: flex; gap: 30px; font-size: 14px; font-weight: 500; letter-spacing: -.01em; color: #3f4655; }
.nav-links .is-current { color: var(--ink); font-weight: 600; }
.nav-cta {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px;
  border-radius: 999px; background: var(--ink); color: #fff;
  font-size: 15px; font-weight: 600; letter-spacing: -.01em;
}

/* ---- full-bleed stage: no card, no slab ---- */
.stage {
  position: relative;
  display: grid;
  align-content: center;
  min-height: 100vh;
  padding: calc(var(--nav-height) + 40px) 0 40px;
  overflow: hidden;
}
.memory-field {
  position: absolute;
  inset: var(--nav-height) 0 0;
  width: 100%;
  height: calc(100% - var(--nav-height));
  pointer-events: none;
}
.stage-inner { position: relative; z-index: 2; width: var(--page); margin: 0 auto; }

.section-no {
  color: #69707c; font: var(--mono); font-weight: 500;
  letter-spacing: .09em; text-transform: uppercase;
}

.concept-tag {
  position: fixed; right: 18px; bottom: 16px; z-index: 60;
  padding: 7px 13px; border: 1px solid var(--line); border-radius: 999px;
  background: rgba(255,255,255,.9); backdrop-filter: blur(8px);
  color: var(--muted); font: var(--mono); font-weight: 500; letter-spacing: .06em; text-transform: uppercase;
}
.concept-tag a { color: var(--purple); }

.a-foot, .b-foot, .c-foot { padding-right: 290px; }

.caveat {
  color: #697184;
  font-size: 12px; letter-spacing: .01em;
}