/* Thrita Technologies — static site styles
   Palette: clinical paper + deep neural navy + one signal accent */
:root {
  --paper: #F6F5F1;
  --paper-dim: #EDEBE3;
  --ink: #14181C;
  --ink-soft: #4A5158;
  --navy: #0E1B2B;
  --navy-soft: #1B2C42;
  --line: #D8D4C8;
  --signal: #2E7D6B;      /* synaptic teal-green, used sparingly */
  --signal-soft: #DCEAE5;
  --serif: "Source Serif 4", "Iowan Old Style", "Georgia", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --max: 1120px;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal { animation: rise .6s ease both; }
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 28px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--navy);
  color: #EDEEF0;
  border-bottom: 1px solid var(--navy-soft);
}
.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--serif);
  font-size: 1.28rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.01em;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.brand small {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
  font-weight: 500;
}
nav.primary { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
nav.primary > .navgroup { position: relative; }
nav.primary a.toplevel {
  display: inline-block;
  padding: 8px 12px;
  color: #C9CDD3;
  font-size: 0.92rem;
  border-radius: 4px;
}
nav.primary a.toplevel:hover, nav.primary a.toplevel.active { color: #fff; text-decoration: none; background: var(--navy-soft); }
.navgroup .submenu {
  list-style: none;
  margin: 0; padding: 6px;
  position: absolute; top: 100%; left: 0;
  background: var(--navy-soft);
  border: 1px solid #2A3D57;
  border-radius: 6px;
  min-width: 210px;
  display: none;
  z-index: 20;
}
.navgroup:hover .submenu, .navgroup:focus-within .submenu { display: block; }
.submenu li a { display: block; padding: 8px 10px; font-size: 0.88rem; color: #C9CDD3; border-radius: 4px; }
.submenu li a:hover { background: #223350; color: #fff; text-decoration: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--navy);
  color: #F2F3F5;
  overflow: hidden;
  padding: 76px 0 84px;
}
.hero .wrap { position: relative; z-index: 2; }
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 16px;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  line-height: 1.12;
  margin: 0 0 18px;
  max-width: 15ch;
  font-weight: 600;
}
.hero p.lead {
  max-width: 56ch;
  font-size: 1.08rem;
  color: #C9CDD3;
  margin: 0;
}
.hero-net {
  position: absolute; inset: 0; z-index: 1;
  opacity: 0.55;
  pointer-events: none;
}

/* ---------- Page header (interior pages) ---------- */
.page-head {
  background: var(--navy);
  color: #fff;
  padding: 48px 0 40px;
}
.page-head .kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 10px;
}
.page-head h1 {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.4vw, 2.5rem);
  margin: 0;
  font-weight: 600;
}

/* ---------- Layout ---------- */
main { padding: 56px 0 72px; }
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 56px;
  align-items: start;
}
.layout.single { grid-template-columns: minmax(0, 1fr); max-width: 760px; }
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.content h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  margin: 2.2em 0 0.6em;
  font-weight: 600;
  color: var(--ink);
}
.content h2:first-child { margin-top: 0; }
.content p { margin: 0 0 1.1em; color: var(--ink-soft); max-width: 68ch; }
.content p.emph {
  font-family: var(--serif);
  font-size: 1.12rem;
  color: var(--ink);
  border-left: 3px solid var(--signal);
  padding-left: 18px;
  max-width: 62ch;
}
.content hr { border: none; border-top: 1px solid var(--line); margin: 2.4em 0; }
.content a.cta {
  display: inline-block;
  margin-top: 6px;
  padding: 10px 18px;
  background: var(--signal);
  color: #fff;
  border-radius: 4px;
  font-size: 0.92rem;
  font-weight: 600;
}
.content a.cta:hover { background: #256657; text-decoration: none; }

.figure-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 32px;
  margin: 1.6em 0 2.4em;
}
@media (max-width: 640px) { .figure-grid { grid-template-columns: 1fr; } }
.figure-grid figure { margin: 0; }
.figure-grid img {
  border-radius: 6px;
  border: 1px solid var(--line);
}
.figure-grid figcaption {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  margin-top: 8px;
  text-transform: uppercase;
}
.figure-grid figcaption strong { display: block; font-family: var(--sans); text-transform: none; font-size: 0.9rem; color: var(--ink); margin-bottom: 3px; letter-spacing: 0; }

.hero-figure { margin: 0 0 2em; }
.hero-figure img { border-radius: 8px; border: 1px solid var(--line); }

.embed-note {
  border: 1px dashed var(--line);
  background: var(--paper-dim);
  border-radius: 6px;
  padding: 18px 20px;
  margin: 1.4em 0 2.2em;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.embed-note a { word-break: break-all; }

.iframe-figure {
  margin: 1.4em 0 2.2em;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}
.iframe-figure iframe {
  width: 100%;
  height: 560px;
  border: 0;
  display: block;
}
@media (max-width: 640px) {
  .iframe-figure iframe { height: 420px; }
}

/* ---------- Sidebar ---------- */
.sidebar { display: flex; flex-direction: column; gap: 22px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px 22px 24px;
}
.card h3 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 12px;
}
.card p { margin: 0 0 8px; font-size: 0.92rem; color: var(--ink-soft); }
.card address { font-style: normal; font-size: 0.92rem; color: var(--ink); line-height: 1.55; margin: 0 0 10px; }
.card .about-copy { font-size: 0.92rem; color: var(--ink-soft); }

/* ---------- Contact ---------- */
.contact-block { margin-top: 1.6em; }
.contact-block dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; margin: 0; }
.contact-block dt { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); align-self: center; }
.contact-block dd { margin: 0; font-size: 1rem; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy);
  color: #9AA3AD;
  padding: 28px 0;
  font-size: 0.82rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.site-footer a { color: #C9CDD3; }

/* ---------- Mobile nav toggle ---------- */
.nav-toggle { display: none; }
@media (max-width: 760px) {
  nav.primary { display: none; width: 100%; flex-direction: column; align-items: stretch; }
  nav.primary.open { display: flex; }
  .navgroup .submenu { position: static; display: block; border: none; background: transparent; padding-left: 12px; }
  .nav-toggle {
    display: inline-flex;
    background: none; border: 1px solid #2A3D57; color: #fff;
    padding: 7px 12px; border-radius: 4px; font-size: 0.85rem; cursor: pointer;
  }
  .header-inner { flex-direction: column; align-items: flex-start; }
}