/* ============================================================
   Fallout Systems Group (FSG) — core stylesheet
   Theme: dark / technical / radar monitoring
   ============================================================ */

:root {
  /* Surfaces */
  --bg:        #060a0f;
  --bg-1:      #0a121b;
  --bg-2:      #0d1722;
  --panel:     rgba(14, 24, 34, 0.72);
  --panel-2:   rgba(18, 30, 42, 0.6);

  /* Brand accents */
  --green:     #00e8a0;   /* primary phosphor */
  --green-2:   #1effb0;
  --cyan:      #29b6ff;   /* secondary */
  --amber:     #ffb000;   /* HUD warning */
  --blip:      #7cffd1;

  /* Text */
  --text:      #c2d2de;
  --head:      #eaf6ff;
  --muted:     #7a8fa1;
  --faint:     #51687a;

  /* Lines */
  --line:      rgba(120, 180, 200, 0.12);
  --line-2:    rgba(0, 232, 160, 0.22);

  /* Effects */
  --grad:      linear-gradient(120deg, var(--green), var(--cyan));
  --glow:      0 0 30px rgba(0, 232, 160, 0.18);
  --radius:    14px;

  /* Type */
  --font-display: "Chakra Petch", "Bahnschrift", "Segoe UI Semibold", "Segoe UI", system-ui, sans-serif;
  --font-body:    "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono:    "Share Tech Mono", "IBM Plex Mono", "Cascadia Mono", ui-monospace, monospace;

  --maxw: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  /* layered technical background */
  background-image:
    radial-gradient(900px 600px at 80% -10%, rgba(0,232,160,0.10), transparent 60%),
    radial-gradient(800px 500px at 0% 110%, rgba(41,182,255,0.08), transparent 60%),
    linear-gradient(rgba(120,180,200,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,200,0.035) 1px, transparent 1px);
  background-size: auto, auto, 46px 46px, 46px 46px;
  background-attachment: fixed;
}

/* thin scanline overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(to bottom, rgba(0,0,0,0) 0 3px, rgba(0,0,0,0.05) 3px 4px);
  mix-blend-mode: overlay;
  opacity: 0.5;
}

a { color: var(--green); text-decoration: none; }
a:hover { color: var(--green-2); }
img, svg { max-width: 100%; }
::selection { background: rgba(0,232,160,0.3); color: #fff; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { font-family: var(--font-display); color: var(--head); line-height: 1.12; font-weight: 600; letter-spacing: 0.01em; margin: 0 0 .5em; }

/* Mono / HUD label */
.kicker {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .35em;
  text-transform: uppercase;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.kicker::before { content: ""; width: 26px; height: 1px; background: var(--green); opacity: .7; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 600;
  letter-spacing: .04em;
  padding: 13px 24px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer; transition: all .2s ease;
  font-size: .98rem;
}
.btn-primary { background: var(--grad); color: #032018; box-shadow: var(--glow); }
.btn-primary:hover { color: #021712; transform: translateY(-2px); box-shadow: 0 0 40px rgba(0,232,160,0.35); }
.btn-ghost { background: transparent; color: var(--head); border-color: var(--line-2); }
.btn-ghost:hover { border-color: var(--green); color: var(--green); background: rgba(0,232,160,0.06); }
.btn svg { width: 18px; height: 18px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(6,10,15,0.72);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo { height: 46px; width: auto; display: block; }
.nav-links { display: flex; align-items: center; gap: 30px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--text); font-family: var(--font-display); font-size: .96rem; letter-spacing: .03em;
  position: relative; padding: 6px 0;
}
.nav-links a:hover { color: var(--head); }
.nav-links a::after { content:""; position:absolute; left:0; bottom:0; height:2px; width:0; background: var(--grad); transition: width .25s ease; }
.nav-links a:hover::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line-2); border-radius: 8px; padding: 8px; cursor: pointer; }
.nav-toggle span { display:block; width:22px; height:2px; background: var(--head); margin: 4px 0; transition:.2s; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 92px 0 86px; overflow: hidden; }
.hero-radar {
  position: absolute; right: -160px; top: 50%; transform: translateY(-50%);
  width: 720px; height: 720px; max-width: 70vw; opacity: .9; pointer-events: none; z-index: 0;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 4rem); margin-top: 18px; }
.hero h1 .accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.18rem; color: var(--text); max-width: 620px; margin: 22px 0 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.statline { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 46px; padding-top: 26px; border-top: 1px solid var(--line); }
.statline .stat .num { font-family: var(--font-display); font-size: 1.7rem; color: var(--head); font-weight: 700; }
.statline .stat .lbl { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); }

/* ---------- Section scaffolding ---------- */
section { position: relative; padding: 84px 0; }
.section-head { max-width: 720px; margin-bottom: 46px; }
.section-head h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); margin-top: 14px; }
.section-head p { color: var(--muted); font-size: 1.08rem; }
.divider { height:1px; background: var(--line); border:0; margin:0; }

/* ---------- Capability cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  position: relative; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 26px 30px; overflow: hidden;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.card::before { content:""; position:absolute; inset:0 0 auto 0; height:2px; background: var(--grad); transform: scaleX(0); transform-origin: left; transition: transform .3s ease; }
.card:hover { transform: translateY(-4px); border-color: var(--line-2); box-shadow: 0 18px 50px rgba(0,0,0,0.45); }
.card:hover::before { transform: scaleX(1); }
.card .ico {
  width: 54px; height: 54px; display: grid; place-items: center; border-radius: 12px;
  background: rgba(0,232,160,0.08); border: 1px solid var(--line-2); margin-bottom: 18px; color: var(--green);
}
.card .ico svg { width: 28px; height: 28px; }
.card h3 { font-size: 1.22rem; }
.card p { color: var(--muted); font-size: .98rem; margin: 0; }
.card .tag { display:inline-block; margin-top:16px; font-family: var(--font-mono); font-size:.7rem; letter-spacing:.18em; text-transform:uppercase; color: var(--cyan); border:1px solid var(--line); padding:4px 10px; border-radius:20px; }

/* ---------- Operational console ---------- */
.console { background: linear-gradient(180deg, var(--bg-1), var(--bg)); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.console-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items:center; }
.console-radar { position: relative; aspect-ratio: 1; max-width: 460px; margin: 0 auto; width: 100%; }
.readout { display:grid; gap:14px; }
.readout .row { display:flex; align-items:center; justify-content:space-between; padding:14px 18px; background: var(--panel-2); border:1px solid var(--line); border-radius:10px; font-family: var(--font-mono); }
.readout .row .k { color: var(--muted); font-size:.82rem; letter-spacing:.12em; text-transform:uppercase; }
.readout .row .v { color: var(--green); font-size:1.02rem; }
.readout .row .v.warn { color: var(--amber); }
.readout .row .v.ok { color: var(--green); }
.pulse-dot { display:inline-block; width:8px; height:8px; border-radius:50%; background: var(--green); margin-right:8px; box-shadow:0 0 0 0 rgba(0,232,160,.6); animation: pulse 2s infinite; vertical-align: middle; }

/* ---------- Approach ---------- */
.approach-grid { display:grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature { padding: 24px; border:1px solid var(--line); border-radius:var(--radius); background: var(--panel); }
.feature .n { font-family: var(--font-mono); color: var(--cyan); font-size:.8rem; letter-spacing:.2em; }
.feature h4 { font-size:1.08rem; margin:.5em 0 .4em; }
.feature p { color: var(--muted); font-size:.92rem; margin:0; }

/* ---------- Contact ---------- */
.contact { text-align:center; }
.contact-card {
  position: relative; max-width: 820px; margin: 0 auto; padding: 56px 40px;
  border:1px solid var(--line-2); border-radius: 20px; overflow:hidden;
  background:
    radial-gradient(600px 300px at 50% -40%, rgba(0,232,160,0.14), transparent 70%),
    var(--panel);
}
.contact-card h2 { font-size: clamp(1.8rem, 4vw, 2.7rem); }
.contact-card p { color: var(--text); max-width: 560px; margin: 0 auto 28px; }
.mail {
  display:inline-flex; align-items:center; gap:12px; font-family: var(--font-display); font-size:1.3rem;
  color: var(--head); border:1px solid var(--line-2); border-radius:10px; padding:14px 26px; margin-bottom: 26px;
  transition: all .2s ease;
}
.mail:hover { border-color: var(--green); box-shadow: var(--glow); color: var(--green); }
.contact .note { font-family: var(--font-mono); font-size:.78rem; letter-spacing:.14em; text-transform:uppercase; color: var(--muted); margin-top: 6px; }

/* ---------- Footer ---------- */
.site-footer { border-top:1px solid var(--line); padding: 50px 0 36px; background: var(--bg); }
.footer-grid { display:flex; justify-content:space-between; align-items:flex-start; gap:30px; flex-wrap:wrap; }
.footer-brand { max-width: 360px; }
.footer-brand .logo { height: 40px; margin-bottom: 14px; }
.footer-brand p { color: var(--muted); font-size:.92rem; }
.footer-col h5 { font-family: var(--font-display); color: var(--head); font-size:.86rem; letter-spacing:.16em; text-transform:uppercase; margin:0 0 14px; }
.footer-col ul { list-style:none; margin:0; padding:0; display:grid; gap:9px; }
.footer-col a, .footer-col li { color: var(--muted); font-size:.92rem; }
.footer-bottom { margin-top: 40px; padding-top: 22px; border-top:1px solid var(--line); display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap; font-family: var(--font-mono); font-size:.76rem; color: var(--faint); letter-spacing:.08em; }
.footer-bottom .status { color: var(--green); }

/* ---------- Reveal animation ---------- */
.reveal { opacity:0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity:1; transform:none; }

/* ---------- Keyframes ---------- */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0% { box-shadow:0 0 0 0 rgba(0,232,160,.55);} 70% { box-shadow:0 0 0 12px rgba(0,232,160,0);} 100% { box-shadow:0 0 0 0 rgba(0,232,160,0);} }
@keyframes blip { 0%,100% { opacity:.15;} 50% { opacity:1; } }

/* radar sweep element (used in CSS radars) */
.sweep { transform-box: view-box; transform-origin: 50% 50%; animation: spin 4.5s linear infinite; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-radar { right: -40%; opacity: .35; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .console-grid { grid-template-columns: 1fr; gap: 36px; }
  .approach-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .nav-links, .nav-cta .btn { display: none; }
  .nav-toggle { display: block; }
  .nav.open .nav-links {
    display: flex; flex-direction: column; position: absolute; top: 76px; left: 0; right: 0;
    background: rgba(6,10,15,.97); border-bottom:1px solid var(--line); padding: 18px 24px; gap: 16px;
  }
  .cards, .approach-grid { grid-template-columns: 1fr; }
  section { padding: 60px 0; }
  .contact-card { padding: 40px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .sweep { animation: none !important; }
}