:root {
  --ink:        #131A21;
  --ink-soft:   #55636E;
  --ink-faint:  #8794A0;
  --paper:      #F4F6F5;
  --surface:    #FFFFFF;
  --surface-2:  #EBEFEE;
  --rule:       #D2DAD8;
  --rule-soft:  #E2E8E7;
  --accent:     #0E6F79;
  --accent-ink: #0B565E;
  --accent-wash:#E0EFF0;
  --done:       #2F6B4F;
  --done-wash:  #E1EEE7;
  --signal:     #A8621A;
  --signal-wash:#F6EADC;

  --display: "Zilla Slab", Georgia, "Times New Roman", serif;
  --body: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink:        #E6EBEA;
    --ink-soft:   #A3B0B6;
    --ink-faint:  #74838B;
    --paper:      #0E1418;
    --surface:    #161E23;
    --surface-2:  #1D262C;
    --rule:       #2C383F;
    --rule-soft:  #232E34;
    --accent:     #3FAFB8;
    --accent-ink: #7FD0D6;
    --accent-wash:#123037;
    --done:       #5FB98C;
    --done-wash:  #16301F;
    --signal:     #D69148;
    --signal-wash:#33261A;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.62;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 780px; margin: 0 auto; padding: 0 28px 96px; }
.wrap.wide { max-width: 980px; }

/* ---------- site nav ---------- */
nav.site {
  border-bottom: 1px solid var(--rule);
  margin-bottom: 44px;
}
nav.site .inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  gap: 24px;
  align-items: baseline;
  flex-wrap: wrap;
}
nav.site.wide .inner { max-width: 980px; }
nav.site .mark {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}
nav.site a.navlink {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
}
nav.site a.navlink:hover,
nav.site a.navlink[aria-current="page"] { color: var(--accent-ink); }

/* ---------- masthead ---------- */
header.masthead { border-bottom: 2px solid var(--ink); padding-bottom: 26px; margin-bottom: 42px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
  font-weight: 500;
}
h1 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(2.15rem, 6vw, 3.2rem);
  line-height: 1.06;
  letter-spacing: -.017em;
  margin: 0 0 18px;
  text-wrap: balance;
}
.standfirst { font-size: 1.1rem; color: var(--ink-soft); max-width: 60ch; margin: 0; }

/* ---------- sections ---------- */
section { margin: 0 0 56px; }
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.48rem;
  letter-spacing: -.01em;
  margin: 0;
}
.sec-note { font-size: .875rem; color: var(--ink-faint); margin: 0; }
h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.08rem;
  margin: 0 0 8px;
}
p { margin: 0 0 15px; }
a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.pull {
  font-family: var(--display);
  font-size: 1.2rem;
  line-height: 1.48;
  border-left: 3px solid var(--accent);
  padding: 6px 0 6px 22px;
  margin: 0 0 8px;
}

/* ---------- family cards ---------- */
.families { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.fam {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 20px 22px;
}
.fam .field {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 7px;
}
.fam p.j { font-size: .88rem; color: var(--ink-soft); margin: 0; }
.fam p.lead { font-size: .93rem; margin: 0 0 12px; }

/* ---------- register tables ---------- */
.tscroll { overflow-x: auto; margin-bottom: 8px; }
table { width: 100%; border-collapse: collapse; font-size: .89rem; font-variant-numeric: tabular-nums; }
caption {
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--ink-faint);
  padding-bottom: 10px;
}
th {
  text-align: left;
  font-weight: 600;
  font-size: .69rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule);
  padding: 0 14px 8px 0;
  white-space: nowrap;
}
td { padding: 9px 14px 9px 0; border-bottom: 1px solid var(--rule-soft); vertical-align: baseline; }
tr:last-child td { border-bottom: none; }
td.num { font-family: var(--mono); font-size: .82rem; white-space: nowrap; }
.st {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 2px;
  white-space: nowrap;
  background: var(--done-wash);
  color: var(--done);
}
.st.pend { background: var(--signal-wash); color: var(--signal); }

/* ---------- patent-family figures ---------- */
figure.card {
  margin: 0 0 22px;
}
figure.card img {
  display: block;
  width: 100%;
  height: auto;
  background: #F7F5F2;
  border: 1px solid var(--rule);
  border-radius: 3px;
}
figure.card figcaption {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-faint);
  margin-top: 9px;
}

/* ---------- faq ---------- */
.faq { display: flex; flex-direction: column; gap: 26px; }
.qa .q {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.08rem;
  margin: 0 0 7px;
}
.qa .a { margin: 0; color: var(--ink-soft); }

/* ---------- profile links ---------- */
.links { display: flex; flex-wrap: wrap; gap: 9px; }
.links a {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 6px 11px;
  color: var(--ink-soft);
  text-decoration: none;
}
.links a:hover { border-color: var(--accent); color: var(--accent-ink); }

.note {
  background: var(--surface-2);
  border-radius: 3px;
  padding: 16px 20px;
  font-size: .89rem;
  color: var(--ink-soft);
  margin: 0;
}
.note strong { color: var(--ink); }

footer.end {
  border-top: 1px solid var(--rule);
  padding-top: 22px;
  font-size: .82rem;
  color: var(--ink-faint);
}
footer.end p { margin: 0 0 8px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
@media (max-width: 560px) { .wrap, nav.site .inner { padding-left: 18px; padding-right: 18px; } }