/* GridVolt — dark project-supply theme: deep navy, amber accent (same visual family as the 3D substation) */
:root{
  --bg:#0b1420; --bg2:#12253c; --panel:#101e30; --panel2:#0d1a2a;
  --ink:#eef3f8; --dim:#a9b8c6; --muted:#8496a8;
  --line:rgba(255,255,255,.13); --line2:rgba(255,255,255,.08);
  --amber:#ffb84d; --amber2:#ff7d00; --green:#1faa55; --green2:#23bd5f;
  --radius:14px; --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Arial,Helvetica,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
a{color:var(--amber);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* header / nav */
header.site{position:sticky;top:0;z-index:50;background:rgba(11,20,32,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line2)}
.nav{display:flex;align-items:center;gap:22px;padding:13px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:21px;color:var(--ink);white-space:nowrap;letter-spacing:.12em}
.brand img{width:34px;height:34px}
.brand em{font-style:normal;color:var(--amber)}
.brand:hover{text-decoration:none}
nav.main{margin-left:auto;display:flex;align-items:center;gap:4px;flex-wrap:wrap}
nav.main>a,nav.main .drop>button{display:inline-block;padding:8px 12px;color:var(--ink);font-size:15px;border-radius:6px;cursor:pointer}
nav.main>a:hover,nav.main .drop>button:hover{background:rgba(255,255,255,.07);text-decoration:none}
nav.main .drop>button{background:transparent;border:0;font-family:inherit;text-align:left}
.burger{display:none;background:transparent;border:1px solid var(--line);border-radius:8px;width:42px;height:38px;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;margin-left:8px;padding:0}
.burger span{display:block;width:20px;height:2px;background:var(--ink)}
.wa-icon{display:none;width:38px;height:38px;border-radius:50%;background:var(--green);align-items:center;justify-content:center;margin-left:auto;flex:0 0 auto}
.wa-icon:hover{background:var(--green2);text-decoration:none}
.wa-icon svg{width:20px;height:20px;fill:#fff;display:block}
.drop{position:relative}
.drop .menu{display:none;position:absolute;top:100%;left:0;background:var(--bg2);border:1px solid var(--line);border-radius:10px;min-width:250px;box-shadow:0 14px 34px rgba(0,0,0,.45);padding:6px;z-index:60}
.drop:hover .menu{display:block}
.drop.open .menu{display:block}
.drop:focus-within .menu{display:block}
.drop .menu a{display:block;padding:8px 10px;color:var(--ink);border-radius:6px;font-size:14.5px}
.drop .menu a:hover{background:rgba(255,255,255,.07);text-decoration:none}
.btn{display:inline-block;padding:11px 22px;border-radius:9px;font-weight:650;font-size:15px;border:1px solid transparent;cursor:pointer}
.btn:hover{text-decoration:none;filter:brightness(1.08)}
.btn-wa{background:var(--green);color:#fff}
.btn-wa:hover{background:var(--green2)}
.btn-amber{background:var(--amber);color:#0b1420}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.nav .btn{padding:8px 16px}

/* hero */
.hero{background:linear-gradient(160deg,#0b1420,#12253c 70%,#16324f);color:#fff;padding:64px 0 56px;border-bottom:1px solid var(--line2)}
.hero .brandline{font-size:13px;font-weight:700;letter-spacing:.28em;text-transform:uppercase;color:var(--amber);margin:0 0 14px}
.hero h1{font-size:42px;line-height:1.16;margin:0 0 18px;letter-spacing:-.4px;font-weight:750;max-width:820px}
.hero p.lead{font-size:18px;color:var(--dim);max-width:720px;margin:0 0 28px;line-height:1.6}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap}
.trustbar{display:flex;flex-wrap:wrap;gap:10px 0;margin-top:32px;padding-top:20px;border-top:1px solid var(--line);color:var(--dim);font-size:14px;font-weight:600;letter-spacing:.4px}
.trustbar span{padding:0 18px;border-right:1px solid var(--line)}
.trustbar span:first-child{padding-left:0}
.trustbar span:last-child{border-right:none}

/* page head (inner pages) */
.pagehead{background:linear-gradient(160deg,#0b1420,#12253c 75%);padding:48px 0 40px;border-bottom:1px solid var(--line2)}
.pagehead h1{font-size:34px;line-height:1.2;margin:0 0 12px;letter-spacing:-.3px}
.pagehead p{font-size:17px;color:var(--dim);max-width:760px;margin:0}

/* 3D stage */
.stage{position:relative;margin-top:36px;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#060c14;box-shadow:0 22px 50px rgba(0,0,0,.45);aspect-ratio:16/8.2}
.stage img.poster{width:100%;height:100%;object-fit:cover;display:block}
.stage iframe{width:100%;height:100%;border:0;display:block}
.stage .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,12,20,.05),rgba(6,12,20,.55));display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding:26px;gap:12px}
.stage .play{display:inline-flex;align-items:center;gap:10px;background:var(--amber);color:#0b1420;font-weight:750;font-size:16px;border:0;border-radius:12px;padding:14px 26px;cursor:pointer;box-shadow:0 12px 30px rgba(0,0,0,.5)}
.stage .play:hover{filter:brightness(1.07)}
.stage .play .tri{font-size:13px}
.stage .cap{color:var(--ink);font-size:13.5px;letter-spacing:.03em;text-align:center}
.stage-row{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:14px}
.stage-row .note{color:var(--muted);font-size:13.5px}

/* sections */
section{padding:60px 0}
section.alt{background:var(--panel2)}
h2{font-size:29px;color:var(--ink);margin:0 0 12px;line-height:1.25;letter-spacing:-.3px}
h3{font-size:19px;color:var(--ink);margin:0 0 8px}
.eyebrow{display:block;font-size:13px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;color:var(--amber);margin-bottom:10px}
.lead{color:var(--dim);max-width:760px;margin:0 0 30px;font-size:17px}
.grid{display:grid;gap:20px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--panel);border:1px solid var(--line2);border-radius:var(--radius);padding:24px}
.card:hover{border-color:rgba(255,184,77,.45)}
.card h3{margin-top:0}
.card p{color:var(--dim);margin:0 0 12px;font-size:15px}
.card .go{font-weight:650;font-size:14.5px}
.tag{display:inline-block;background:rgba(255,184,77,.14);color:var(--amber);font-size:12.5px;font-weight:650;padding:3px 10px;border-radius:20px;margin-bottom:10px}

/* spec tables */
table{width:100%;border-collapse:collapse;background:var(--panel2);font-size:15px;margin:14px 0;border-radius:10px;overflow:hidden}
th,td{border:1px solid var(--line2);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--bg2);color:var(--amber);font-weight:650;width:34%}
td{color:var(--ink)}
tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.spec-note{color:var(--muted);font-size:13.5px;margin-top:6px}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.table-wrap table{margin:0}
h2.spaced{margin-top:44px}
img.page-img{width:100%;height:auto;display:block;border:1px solid var(--line2);border-radius:14px;margin:0 0 28px}

/* steps */
.steps{display:grid;gap:16px}
.step{display:flex;gap:16px;background:var(--panel);border:1px solid var(--line2);border-radius:var(--radius);padding:20px 22px}
.step-n{flex:0 0 auto;width:38px;height:38px;border-radius:50%;background:var(--amber);color:#0b1420;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:17px}
.step h3{margin:4px 0 6px}
.step p{color:var(--dim);margin:0;font-size:15px}

/* CTA band */
.cta-band{background:linear-gradient(135deg,#12253c,#0b1420);border:1px solid rgba(255,184,77,.35);border-radius:16px;padding:38px 34px;text-align:left}
.cta-band h2{margin-bottom:8px}
.cta-band p{color:var(--dim);margin:0 0 22px;max-width:640px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}

/* footer */
footer.site{background:#081020;border-top:1px solid var(--line2);padding:48px 0 30px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
footer.site h4{color:var(--ink);margin:0 0 12px;font-size:15px;letter-spacing:.06em;text-transform:uppercase}
footer.site p{color:var(--dim);font-size:14.5px;margin:0}
footer.site ul{list-style:none;margin:0;padding:0}
footer.site li{margin-bottom:8px}
footer.site li a{color:var(--dim);font-size:14.5px}
footer.site li a:hover{color:var(--amber)}
.foot-bottom{border-top:1px solid var(--line2);margin-top:34px;padding-top:18px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}

/* FAQ */
details{border:1px solid var(--line2);border-radius:10px;background:var(--panel);margin-bottom:10px;padding:0 18px}
details summary{cursor:pointer;font-weight:650;color:var(--ink);padding:14px 0}
details p{color:var(--dim);margin:0 0 14px}

@media (max-width:860px){
  .grid.c2,.grid.c3{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero h1{font-size:31px}
  .pagehead h1{font-size:27px}
  .stage{aspect-ratio:4/3.4}
  .nav{gap:12px}
  .wa-icon{display:inline-flex}
  .burger{display:inline-flex}
  nav.main{display:none;margin-left:0}
  nav.main.open{display:flex;flex-direction:column;align-items:stretch;flex-wrap:nowrap;gap:2px;position:absolute;top:100%;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--line);padding:10px 20px 14px;box-shadow:0 18px 30px rgba(0,0,0,.4);max-height:calc(100vh - 62px);overflow-y:auto;z-index:55}
  nav.main>a,nav.main .drop>button{display:block;width:100%;padding:12px 10px;font-size:15px}
  nav.main .btn{margin-top:8px;text-align:center}
  .drop .menu{position:static;display:block;background:transparent;border:0;box-shadow:none;padding:0 0 4px 16px;min-width:0}
  .drop .menu a{padding:11px 10px;font-size:15px}
}