@font-face {
  font-family: "Archivo";
  src: url("fonts/archivo.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}

:root {
  /* Colors match the Spydoku app's dark theme (Theme.swift, SectorPalette.swift) */
  color-scheme: dark;
  --steel: #0b0e13;        /* page background */
  --steel-deep: #2a3340;   /* hairlines */
  --panel: #151a22;        /* surfaces */
  --raised: #1d2430;
  --navy: #ece6d6;         /* primary ink */
  --navy-soft: #9aa3b2;    /* secondary ink */
  --signal: #e2b644;       /* gold accent */
  --signal-ink: #e2b644;
  --link: #e2b644;
  --measure: 36rem;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--steel);
  color: var(--navy);
  font-family: "Archivo", system-ui, sans-serif;
  font-stretch: 100%;
  font-size: 1.0625rem;
  line-height: 1.55;
}

a { color: var(--link); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: 66rem; margin: 0 auto; padding: 0 1.5rem; }

.site-head { padding: 1.5rem 0; }
.site-head .wrap { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.mark { display: inline-block; line-height: 0; }
.mark img { display: block; height: 1.35rem; width: auto; }
.site-head nav { display: flex; gap: 1.25rem; font-size: 0.95rem; }
.site-head nav a { color: var(--navy-soft); text-decoration: none; }
.site-head nav a:hover, .site-head nav a[aria-current] { color: var(--navy); text-decoration: underline; }

/* Hero: wordmark */
.hero { display: grid; gap: 3rem; padding-top: 3rem; padding-bottom: 4.5rem; align-items: center; }

.wordmark { margin: 0 0 2rem; line-height: 0; }
.wordmark img { display: block; width: 100%; max-width: 36rem; height: auto; }
.thesis { font-size: clamp(1.35rem, 2.6vw, 1.75rem); font-weight: 600; font-stretch: 90%; margin: 0 0 0.75rem; }
.lede { margin: 0; max-width: 30rem; color: var(--navy-soft); }

section { padding: 3.5rem 0; border-top: 1px solid var(--steel-deep); }
h2 { font-weight: 800; font-stretch: 75%; font-size: clamp(1.9rem, 4.4vw, 2.7rem); line-height: 1.05; margin: 0 0 1.25rem; letter-spacing: 0; }
h3 { font-weight: 750; font-stretch: 85%; font-size: 1.3rem; margin: 0 0 0.35rem; }

.split { display: grid; gap: 2rem; }
@media (min-width: 52rem) { .split { grid-template-columns: 16rem 1fr; gap: 4rem; } }

.prose { max-width: var(--measure); }
.prose p { margin: 0 0 1em; }

.pair { display: grid; gap: 2rem; }
@media (min-width: 40rem) { .pair { grid-template-columns: 1fr 1fr; } }
.pair p { margin: 0; color: var(--navy-soft); }

.contact-line { font-size: clamp(1.4rem, 4vw, 2rem); font-weight: 700; font-stretch: 85%; margin: 0; }

.site-foot { padding: 2.5rem 0 3rem; border-top: 1px solid var(--steel-deep); font-size: 0.9rem; color: var(--navy-soft); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; justify-content: space-between; }
.site-foot nav { display: flex; gap: 1.25rem; }
.site-foot a { color: var(--navy-soft); }

.doc { padding-top: 2.5rem; padding-bottom: 4rem; }
.doc h1 { font-weight: 900; font-stretch: 65%; font-size: clamp(2.8rem, 8vw, 4.5rem); line-height: 0.95; margin: 0 0 0.5rem; }
.doc .updated { color: var(--navy-soft); margin: 0 0 2.5rem; }
.doc h2 { font-size: 1.6rem; margin: 2.5rem 0 0.75rem; }
.doc .prose ul { padding-left: 1.2em; }
.doc .prose li { margin-bottom: 0.4em; }
.home .site-head .mark { visibility: hidden; }