/* ===========================================================
   AVFRST — Autonomous-Vehicle First-Responder Safety
   Design tokens
   Palette: signal/safety language without cliché.
   - ink:        deep slate (near-black, cool)
   - asphalt:    mid slate for secondary text
   - paper:      off-white base
   - hi-vis:     safety amber — the single bold accent
   - beacon:     muted emergency red, used sparingly
   - line:       hairline borders
   Display: "Archivo" (condensed, industrial, signage-like)
   Body:    "Inter" (clean, neutral, legible)
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@500;600;700;800&family=Inter:wght@400;500;600&display=swap');

:root{
  --ink:#15191e;
  --asphalt:#4a525c;
  --paper:#f7f6f3;
  --paper-2:#eeece6;
  --hi-vis:#f5a623;       /* safety amber accent */
  --hi-vis-deep:#d9881a;
  --beacon:#c8412f;       /* muted emergency red */
  --line:#d9d6cf;
  --white:#ffffff;
  --max:1140px;
  --display:'Archivo', system-ui, sans-serif;
  --body:'Inter', system-ui, sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--display);line-height:1.08;letter-spacing:-0.01em}
h1{font-size:clamp(2.4rem,5.5vw,4.2rem);font-weight:800;text-transform:uppercase}
h2{font-size:clamp(1.7rem,3.2vw,2.5rem);font-weight:700}
h3{font-size:1.18rem;font-weight:700}
.eyebrow{
  font-family:var(--display);
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:0.16em;
  font-size:.78rem;
  color:var(--hi-vis-deep);
}
p{margin-bottom:1rem;color:var(--asphalt)}
p.lead{font-size:1.2rem;color:var(--ink);max-width:60ch}

/* ---------- header / nav ---------- */
.site-head{
  position:sticky;top:0;z-index:50;
  background:rgba(247,246,243,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:800;font-size:1.25rem;letter-spacing:.02em;text-transform:uppercase}
.brand .mark{
  width:30px;height:30px;flex:none;border-radius:6px;
  background:var(--ink);position:relative;
}
.brand .mark::before{
  content:"";position:absolute;inset:6px;border-radius:2px;
  background:var(--hi-vis);
  clip-path:polygon(50% 0,100% 100%,0 100%); /* hazard chevron */
}
nav.main{display:flex;gap:26px;align-items:center}
nav.main a{font-weight:500;font-size:.95rem;color:var(--asphalt);transition:color .15s}
nav.main a:hover,nav.main a.active{color:var(--ink)}
nav.main a.active{border-bottom:2px solid var(--hi-vis);padding-bottom:2px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;font-size:1.5rem;color:var(--ink)}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;font-family:var(--display);font-weight:700;
  text-transform:uppercase;letter-spacing:.04em;font-size:.9rem;
  padding:13px 26px;border-radius:4px;cursor:pointer;transition:transform .12s, background .15s;
  border:2px solid var(--ink);
}
.btn-primary{background:var(--hi-vis);border-color:var(--hi-vis);color:var(--ink)}
.btn-primary:hover{background:var(--hi-vis-deep);border-color:var(--hi-vis-deep);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink);color:var(--paper)}
.hero::after{
  /* hazard-stripe bottom edge */
  content:"";position:absolute;left:0;right:0;bottom:0;height:8px;
  background:repeating-linear-gradient(135deg,var(--hi-vis) 0 22px,var(--ink) 22px 44px);
}
.hero .wrap{padding:96px 24px 104px;position:relative;z-index:2}
.hero .eyebrow{color:var(--hi-vis)}
.hero h1{color:var(--white);max-width:18ch;margin:.5rem 0 1.4rem}
.hero p.lead{color:#cdd2d8;max-width:54ch;margin-bottom:2rem}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-grid-glow{
  position:absolute;inset:0;z-index:1;opacity:.5;
  background:
    radial-gradient(60% 80% at 80% 10%, rgba(245,166,35,.18), transparent 60%),
    linear-gradient(transparent 0 39px, rgba(255,255,255,.04) 39px 40px) 0 0/100% 40px,
    linear-gradient(90deg, transparent 0 39px, rgba(255,255,255,.04) 39px 40px) 0 0/40px 100%;
}

/* ---------- sections ---------- */
section{padding:72px 0}
section.tight{padding:52px 0}
.section-head{max-width:62ch;margin-bottom:40px}
.section-head h2{margin:.4rem 0 .6rem}

.bg-alt{background:var(--paper-2)}
.bg-ink{background:var(--ink);color:var(--paper)}
.bg-ink p{color:#cdd2d8}
.bg-ink h2,.bg-ink h3{color:var(--white)}
.bg-ink .eyebrow{color:var(--hi-vis)}

/* ---------- cards / offer grid ---------- */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:8px;padding:28px;
  transition:transform .15s, box-shadow .15s;
}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px -18px rgba(0,0,0,.3)}
.card .num{font-family:var(--display);font-weight:800;color:var(--hi-vis-deep);font-size:1.1rem;letter-spacing:.05em}
.card h3{margin:.5rem 0 .5rem}
.card p{margin:0;font-size:.97rem}
.bg-ink .card{background:#1d2228;border-color:#2b3138}

/* ---------- numbered process ---------- */
.steps{counter-reset:step;display:grid;gap:2px;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.step{background:var(--white);padding:22px 24px;display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:start;border-bottom:1px solid var(--line)}
.step:last-child{border-bottom:0}
.step .s-num{font-family:var(--display);font-weight:800;font-size:1.5rem;color:var(--hi-vis-deep)}
.step h3{margin-bottom:.25rem}
.step p{margin:0;font-size:.96rem}

/* ---------- callout strip ---------- */
.strip{background:var(--ink);color:var(--paper);border-radius:10px;padding:40px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.strip h2{color:var(--white);max-width:24ch}
.strip p{color:#cdd2d8;margin:0}

/* ---------- regulatory table-ish ---------- */
.reg-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.reg-card{background:var(--white);border:1px solid var(--line);border-left:4px solid var(--hi-vis);border-radius:6px;padding:22px}
.reg-card h3{margin-bottom:.4rem}
.reg-card p{font-size:.95rem;margin:0}

/* ---------- bio ---------- */
.bio{display:grid;grid-template-columns:1fr 2fr;gap:40px;align-items:start}
.bio .who{position:sticky;top:90px}
.bio .who .role{color:var(--hi-vis-deep);font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.85rem}
.bio .who h2{margin-top:.3rem}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px;color:var(--ink)}
.field input,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:6px;
  font-family:var(--body);font-size:1rem;background:var(--white);color:var(--ink);
}
.field input:focus,.field textarea:focus{outline:2px solid var(--hi-vis);border-color:transparent}
.field textarea{min-height:130px;resize:vertical}
.contact-info dt{font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.78rem;color:var(--hi-vis-deep);margin-top:18px}
.contact-info dd{font-size:1.05rem;margin-top:2px}
.form-note{font-size:.85rem;color:var(--asphalt)}
.form-status{padding:12px 14px;border-radius:6px;margin-bottom:16px;font-size:.95rem;display:none}
.form-status.ok{display:block;background:#e6f4ea;color:#1d6b39;border:1px solid #b6dcc3}
.form-status.err{display:block;background:#fbe9e7;color:#a23123;border:1px solid #f0c0b8}

/* ---------- footer ---------- */
.site-foot{background:var(--ink);color:#aeb6bf;padding:48px 0 32px;border-top:8px solid;border-image:repeating-linear-gradient(135deg,var(--hi-vis) 0 22px,var(--ink) 22px 44px) 8}
.site-foot .wrap{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px}
.site-foot .brand{color:var(--white);margin-bottom:10px}
.site-foot h4{font-family:var(--display);text-transform:uppercase;letter-spacing:.1em;font-size:.8rem;color:var(--white);margin-bottom:12px}
.site-foot a{display:block;color:#aeb6bf;font-size:.95rem;padding:3px 0;transition:color .15s}
.site-foot a:hover{color:var(--hi-vis)}
.foot-bottom{border-top:1px solid #2b3138;margin-top:32px;padding-top:18px;font-size:.85rem;color:#7e868f}

/* ---------- responsive ---------- */
@media(max-width:860px){
  nav.main{
    position:fixed;inset:68px 0 auto 0;background:var(--paper);
    flex-direction:column;gap:0;border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:transform .25s;padding:8px 0;
  }
  nav.main.open{transform:translateY(0)}
  nav.main a{padding:14px 24px;width:100%}
  .nav-toggle{display:block}
  .grid-3,.grid-2,.reg-grid,.bio,.contact-grid{grid-template-columns:1fr}
  .bio .who{position:static}
  .site-foot .wrap{grid-template-columns:1fr;gap:24px}
  .strip{flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}