/* AeroMast Defense — design system. Dark, technical, no frameworks. */
:root{
  --bg:#0b0d10; --bg2:#0e1116; --panel:#12151b; --panel2:#161a21;
  --line:#232933; --line2:#2e3542;
  --text:#e9ebee; --muted:#9aa4b0; --faint:#6b7480;
  --accent:#e5322d; --accent-dark:#b71f1b;
  --ok:#37c978;
  --max:1140px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--text)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.kicker{font-family:var(--mono);font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
h1,h2,h3{line-height:1.14;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5.2vw,3.4rem)}
h2{font-size:clamp(1.55rem,3.4vw,2.2rem);margin-bottom:14px}
h3{font-size:1.13rem;margin-bottom:8px}
p{color:var(--muted);margin-bottom:14px}
p strong,li strong{color:var(--text)}
.lede{font-size:1.14rem;color:#c3cad2}
section{padding:74px 0}
.section-head{max-width:720px;margin-bottom:36px}
.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* Header */
header.site{position:sticky;top:0;z-index:50;background:rgba(11,13,16,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand svg{flex:none}
.brand .word{font-weight:800;letter-spacing:.06em;font-size:1.06rem}
.brand .word span{color:var(--accent)}
.brand .sub{font-family:var(--mono);font-size:.62rem;letter-spacing:.3em;color:var(--muted);text-transform:uppercase;display:block;margin-top:1px}
nav.main{display:flex;align-items:center;gap:26px}
nav.main a{text-decoration:none;color:var(--muted);font-size:.98rem}
nav.main a:hover,nav.main a.active{color:var(--text)}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;padding:11px 20px;border-radius:4px;border:1px solid var(--accent);font-size:.98rem}
.btn:hover{background:var(--accent-dark);border-color:var(--accent-dark)}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line2)}
.btn.ghost:hover{border-color:var(--muted)}
.btn.sm{padding:8px 15px;font-size:.9rem}
.nav-toggle{display:none;background:none;border:1px solid var(--line2);border-radius:4px;color:var(--text);padding:7px 11px;font-size:1rem;cursor:pointer}
@media(max-width:820px){
  nav.main{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg2);flex-direction:column;align-items:flex-start;padding:16px 22px 20px;border-bottom:1px solid var(--line);gap:15px}
  nav.main.open{display:flex}
  .nav-toggle{display:block}
}

/* Hero */
.hero{padding:84px 0 70px;background:
  linear-gradient(rgba(11,13,16,.25),var(--bg) 92%),
  repeating-linear-gradient(0deg,transparent,transparent 47px,rgba(255,255,255,.025) 48px),
  repeating-linear-gradient(90deg,transparent,transparent 47px,rgba(255,255,255,.025) 48px),var(--bg)}
.hero h1{max-width:820px;margin-bottom:18px}
.hero .lede{max-width:640px;margin-bottom:28px}
.hero-img{margin-top:44px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#000}
.hero-img img{width:100%}
.cta-row{display:flex;gap:13px;flex-wrap:wrap;margin-top:6px}
.spec-chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:30px}
.chip{font-family:var(--mono);font-size:.8rem;letter-spacing:.04em;border:1px solid var(--line2);border-radius:999px;padding:6px 13px;color:#c3cad2;background:var(--panel)}
.chip b{color:#fff;font-weight:600}

/* Stat strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.stat{background:var(--panel);padding:22px 20px}
.stat .n{font-size:1.72rem;font-weight:700;letter-spacing:-.01em}
.stat .l{font-size:.88rem;color:var(--muted);margin-top:3px}
@media(max-width:820px){.stats{grid-template-columns:repeat(2,1fr)}}

/* Cards */
.grid{display:grid;gap:18px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.grid.c3,.grid.c4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:24px}
.card p{font-size:.97rem}
.card .tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:10px}
.card.dev{border-style:dashed}
.price{font-size:1.5rem;font-weight:700;color:#fff}
.price small{font-size:.85rem;color:var(--muted);font-weight:400}

/* Split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
@media(max-width:820px){.split{grid-template-columns:1fr}}
.split img{border:1px solid var(--line);border-radius:8px}
ul.tick{list-style:none;margin:6px 0 16px}
ul.tick li{padding:7px 0 7px 26px;position:relative;color:var(--muted);border-bottom:1px solid var(--line)}
ul.tick li:last-child{border-bottom:none}
ul.tick li::before{content:"";position:absolute;left:2px;top:15px;width:8px;height:8px;background:var(--accent)}

/* Spec table */
table.spec{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden}
table.spec th,table.spec td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);font-size:.97rem;vertical-align:top}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:none}
table.spec th{width:36%;color:var(--muted);font-weight:500;font-family:var(--mono);font-size:.83rem;letter-spacing:.05em;text-transform:uppercase;padding-top:14px}
table.spec td{color:var(--text)}

/* FAQ */
.faq{border:1px solid var(--line);border-radius:8px;overflow:hidden}
.faq details{background:var(--panel);border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:none}
.faq summary{cursor:pointer;padding:17px 20px;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-weight:700}
.faq details[open ] summary::after{content:"–"}
.faq .a{padding:0 20px 17px;color:var(--muted);font-size:.97rem}

/* Forms */
form.rfq{display:grid;gap:14px}
form.rfq .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:600px){form.rfq .row2{grid-template-columns:1fr}}
label{font-size:.88rem;color:var(--muted);display:block;margin-bottom:5px}
input,select,textarea{width:100%;background:var(--bg2);border:1px solid var(--line2);border-radius:4px;color:var(--text);padding:11px 12px;font:inherit;font-size:.97rem}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}
.form-note{font-size:.88rem;color:var(--faint)}
.form-ok{display:none;background:#0f2c1c;border:1px solid var(--ok);color:#c9f2da;border-radius:6px;padding:15px 17px}

/* Footer */
footer.site{border-top:1px solid var(--line);background:var(--bg2);padding:52px 0 34px;margin-top:0}
.foot{display:grid;grid-template-columns:2fr 1fr 1fr;gap:34px}
@media(max-width:820px){.foot{grid-template-columns:1fr}}
footer.site h4{font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:13px;font-family:var(--mono);font-weight:600}
footer.site a{text-decoration:none;color:var(--muted)}
footer.site a:hover{color:var(--text)}
footer.site li{list-style:none;margin-bottom:8px;color:var(--muted);font-size:.95rem}
.legal{border-top:1px solid var(--line);margin-top:36px;padding-top:20px;font-size:.82rem;color:var(--faint);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.cta-band{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:10px;padding:38px;text-align:left}
@media(max-width:600px){.cta-band{padding:26px}}