/* ===========================================================
   CORUSEN LLC — design tokens
   Palette: graphite/near-black base, amber signal accent
   (evokes thermal/IR sensor readouts + HUD target locks)
   Type: Space Grotesk (display) / Inter (body) / IBM Plex Mono (data)
   =========================================================== */

:root{
  --bg: #0A0D10;
  --bg-raise: #0D1114;
  --panel: #10151A;
  --panel-2: #141A20;
  --line: #232B33;
  --line-soft: #1A2128;
  --text: #DDE4E9;
  --text-dim: #8794A0;
  --text-faint: #56626D;
  --signal: #FF8C42;
  --signal-soft: rgba(255,140,66,0.14);
  --signal-dim: rgba(255,140,66,0.06);
  --ok: #4FD1A5;

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --maxw: 1120px;
}

*, *::before, *::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* subtle blueprint grid backdrop */
body::before{
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.01em;
}

p{ margin: 0; }

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

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
}

.eyebrow .dot{
  width: 6px; height: 6px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--signal-soft);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse{
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ---------- header / nav ---------- */

.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,13,16,0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.brand{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand .mark{
  height: 40px; width: auto;
  flex: none;
  display: block;
}

.brand > span{
  line-height: 1.15;
}

.brand small{
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-top: 2px;
}

.nav-links{
  display: flex;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-links a{
  color: var(--text-dim);
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-links a:hover{ color: var(--text); }

.nav-links a.active{
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.nav-toggle{
  display: none;
  background: none;
  border: 1px solid var(--line);
  color: var(--text);
  width: 38px; height: 38px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content: "";
  display: block;
  width: 16px;
  height: 1px;
  background: var(--text);
  position: relative;
}
.nav-toggle span::before{ position:absolute; top:-5px; }
.nav-toggle span::after{ position:absolute; top:5px; }

/* ---------- corner-bracket signature element ---------- */

.bracket{
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
}

.corner{
  position: absolute;
  width: 12px;
  height: 12px;
  pointer-events: none;
}
.corner-tl{ top: -1px; left: -1px; border-top: 2px solid var(--signal); border-left: 2px solid var(--signal); }
.corner-tr{ top: -1px; right: -1px; border-top: 2px solid var(--signal); border-right: 2px solid var(--signal); }
.corner-bl{ bottom: -1px; left: -1px; border-bottom: 2px solid var(--signal); border-left: 2px solid var(--signal); }
.corner-br{ bottom: -1px; right: -1px; border-bottom: 2px solid var(--signal); border-right: 2px solid var(--signal); }

/* ---------- hero ---------- */

.hero{
  padding: 96px 0 64px;
  position: relative;
  overflow: hidden;
}

.hero-inner{
  max-width: 720px;
}

.hero h1{
  font-size: clamp(34px, 5vw, 54px);
  color: var(--text);
  margin-bottom: 22px;
}

.hero h1 .accent{ color: var(--signal); }

.hero p.lead{
  font-size: 17px;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 34px;
}

.btn-row{ display: flex; gap: 14px; flex-wrap: wrap; }

.btn{
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 13px 22px;
  border: 1px solid var(--line);
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
  display: inline-block;
}

.btn-primary{
  background: var(--signal);
  border-color: var(--signal);
  color: #0A0D10;
  font-weight: 600;
}
.btn-primary:hover{ background: #ffa564; border-color: #ffa564; }

.btn-ghost{ color: var(--text); }
.btn-ghost:hover{ border-color: var(--signal); color: var(--signal); }

/* ---------- stat panel ---------- */

.stat-grid{
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  position: relative;
}

.stat{
  background: var(--panel);
  padding: 22px 20px;
  position: relative;
  overflow: hidden;
}

.stat::after{
  content: "";
  position: absolute;
  left: 0; right: 0; top: -100%;
  height: 40%;
  background: linear-gradient(180deg, transparent, var(--signal-soft), transparent);
  animation: scan 3.6s ease-in-out 0.4s 1;
}

@media (prefers-reduced-motion: reduce){
  .stat::after{ animation: none; }
  .eyebrow .dot{ animation: none; }
}

@keyframes scan{
  0%{ top: -100%; }
  60%{ top: 120%; }
  100%{ top: 120%; }
}

.stat .num{
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  display: block;
}

.stat .label{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 6px;
  display: block;
}

/* ---------- sections ---------- */

section{ padding: 72px 0; }
section.tight{ padding: 48px 0; }
section + section{ border-top: 1px solid var(--line-soft); }

.section-head{
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.section-head h2{
  font-size: clamp(24px, 3vw, 32px);
}

.section-head p{
  color: var(--text-dim);
  max-width: 420px;
  font-size: 14.5px;
}

/* ---------- capability cards ---------- */

.card-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.build-visual{
  margin: 32px 0 40px;
  padding: 16px;
  overflow: hidden;
}

.build-visual img{
  display: block;
  width: 100%;
  height: auto;
}

.card{
  padding: 26px 22px;
}

.card .idx{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}

.card h3{
  font-size: 17px;
  margin: 14px 0 10px;
  color: var(--text);
}

.card p{
  font-size: 14px;
  color: var(--text-dim);
}

/* ---------- program / award cards ---------- */

.program-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.program-card{
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tag-row{ display: flex; flex-wrap: wrap; gap: 8px; }

.tag{
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--line);
  padding: 4px 9px;
}

.tag.signal{ color: var(--signal); border-color: rgba(255,140,66,0.35); }
.tag.ok{ color: var(--ok); border-color: rgba(79,209,165,0.35); }

.program-card h3{
  font-size: 19px;
  color: var(--text);
}

.program-card .sub{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  margin-top: -8px;
}

.program-card p.desc{
  font-size: 14.5px;
  color: var(--text-dim);
  flex: 1;
}

.program-meta{
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.program-meta .amount{ color: var(--signal); font-weight: 600; }

.program-card .more{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}
.program-card .more:hover{ color: var(--signal); }

/* ---------- award detail (awards.html) ---------- */

.award-detail{
  padding: 32px;
  margin-bottom: 24px;
}

.award-detail .agency{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.award-detail h3{
  font-size: 24px;
  margin-bottom: 6px;
}

.award-detail .topic{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-faint);
  margin-bottom: 18px;
}

.award-detail p.desc{
  color: var(--text-dim);
  font-size: 15px;
  max-width: 720px;
  margin-bottom: 20px;
}

.award-detail .footline{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  border-top: 1px solid var(--line-soft);
  padding-top: 16px;
}

.link-out{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--line);
}
.link-out:hover{ color: var(--signal); border-color: var(--signal); }

/* ---------- CTA banner ---------- */

.cta-banner{
  padding: 56px 0;
  text-align: center;
}

.cta-banner h2{
  font-size: clamp(22px, 3vw, 30px);
  margin-bottom: 12px;
}

.cta-banner p{
  color: var(--text-dim);
  max-width: 480px;
  margin: 0 auto 28px;
  font-size: 14.5px;
}

/* ---------- about page ---------- */

.founders-col{
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.founder-card{ padding: 30px; }

.founder-card .role{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--signal);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.founder-card h3{ font-size: 22px; margin-bottom: 14px; }
.founder-card p{ color: var(--text-dim); font-size: 14.5px; margin-bottom: 12px; }

.facts-card{ padding: 26px; }

.fact-row{
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13.5px;
}
.fact-row:last-child{ border-bottom: none; }

.fact-row .k{
  font-family: var(--font-mono);
  color: var(--text-faint);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.06em;
}
.fact-row .v{ color: var(--text); text-align: right; }

.mission-block{ max-width: 680px; margin-bottom: 48px; }
.mission-block p{ color: var(--text-dim); font-size: 15.5px; margin-top: 16px; }

/* ---------- contact page ---------- */

.contact-panel{
  max-width: 480px;
  margin: 0 auto;
  padding: 48px 40px;
  text-align: center;
}

.contact-panel .k{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}

.email-display{
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--text);
  margin-bottom: 24px;
  word-break: break-all;
}

.form-note{
  font-size: 12.5px;
  color: var(--text-faint);
  margin-top: 12px;
}

/* ---------- footer ---------- */

.site-footer{
  border-top: 1px solid var(--line);
  padding: 40px 0;
  margin-top: 40px;
}

.footer-inner{
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-inner .brand{ margin-bottom: 10px; }

.footer-meta{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  line-height: 1.9;
}

.footer-links{
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0; padding: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
}
.footer-links a:hover{ color: var(--signal); }

/* ---------- responsive ---------- */

@media (max-width: 860px){
  .card-grid{ grid-template-columns: 1fr 1fr; }
  .program-grid{ grid-template-columns: 1fr; }
  .stat-grid{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px){
  .nav-links{
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    display: none;
  }
  .nav-links.open{ display: flex; }
  .nav-links a{
    padding: 16px 28px;
    border-bottom: 1px solid var(--line-soft);
    width: 100%;
  }
  .nav-toggle{ display: flex; }
  .card-grid{ grid-template-columns: 1fr; }
  .stat-grid{ grid-template-columns: 1fr 1fr; }
  .hero{ padding: 64px 0 40px; }
  section{ padding: 52px 0; }
}