:root{
  --bg-dark:#0b0b0b; --text-dark:#f0f0f0; --line-dark:#2a2a2a;
  --bg-light:#f9f9f9; --text-light:#111; --line-light:#dddddd;
  --accent:#b30000; --silver:#c0c0c0;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,Segoe UI,Roboto,Arial}
body{background:var(--bg-dark);color:var(--text-dark);transition:background .4s,color .4s}
body.light{background:var(--bg-light);color:var(--text-light)}
a{color:var(--accent);text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:24px}
.header{position:sticky;top:0;background:rgba(0,0,0,.85);backdrop-filter:blur(6px);border-bottom:1px solid var(--line-dark);z-index:20}
body.light .header{background:rgba(255,255,255,.9);border-bottom:1px solid var(--line-light)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;gap:14px}
.menu{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.menu a{padding:8px 12px;border-radius:999px;color:inherit}
.menu a:hover,.menu a.active{background:rgba(255,255,255,.08)}
body.light .menu a:hover{background:rgba(0,0,0,.06)}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:32px;height:32px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:14px;border:1px solid var(--line-dark);background:#121212;color:#fff;box-shadow:0 6px 24px rgba(179,0,0,.22);transition:.25s}
.btn:hover{transform:translateY(-2px);background:var(--accent)}
body.light .btn{background:#fff;color:#b30000;border-color:#ccc}
.hero{position:relative;min-height:76vh;display:grid;place-items:center;overflow:hidden;text-align:center;border-bottom:1px solid var(--line-dark)}
.hero video,.hero .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.32;filter:contrast(1.05)}
.hero .content{position:relative;z-index:2;padding:40px 16px}
.h1{font-size:clamp(28px,5vw,54px);font-weight:900;letter-spacing:.5px;margin:0 0 10px}
.glow{text-shadow:0 0 10px #b30000, 0 0 24px #b30000}
.sub{color:#bfbfbf}
.grid{display:grid;gap:18px}
.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:1000px){.cols-3,.cols-4{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.cols-2,.cols-3,.cols-4{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,#141414,#0e0e0e);border:1px solid var(--line-dark);border-radius:18px;overflow:hidden}
.card .p{padding:18px}
.section{padding:56px 0;border-bottom:1px solid var(--line-dark)}
.section h2{font-size:28px;margin:0 0 12px}
.footer{padding:28px 0;border-top:1px solid var(--line-dark);text-align:center;color:#aaa}
.badge{display:inline-block;padding:6px 10px;border-radius:999px;border:1px solid var(--line-dark);background:#101010;color:#cfcfcf;font-size:12px}
.fab{position:fixed;right:18px;bottom:18px;background:#101010;border:1px solid var(--line-dark);color:#fff;padding:12px 14px;border-radius:999px;z-index:50;box-shadow:0 10px 30px rgba(0,0,0,.35);cursor:pointer}
.theme-toggle{cursor:pointer;border:1px solid var(--line-dark);padding:8px;border-radius:10px}
/* Before-After slider */
.ba-wrapper{position:relative;max-width:100%;border:1px solid var(--line-dark);border-radius:16px;overflow:hidden}
.ba-wrapper img{display:block;width:100%;height:auto}
.ba-overlay{position:absolute;inset:0;overflow:hidden}
.ba-overlay img{position:absolute;left:0;top:0;height:100%;width:100%;object-fit:cover}
.ba-slider{position:absolute;left:50%;top:0;bottom:0;width:3px;background:#b30000;box-shadow:0 0 0 2px rgba(0,0,0,.2)}
.ba-handle{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:26px;height:26px;border-radius:50%;background:#b30000;border:2px solid #fff}
/* Scroll reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s, transform .6s}
.reveal.visible{opacity:1;transform:none}
/* Light mode overrides */
body.light .card{background:#fff;border:1px solid #e9e9e9}
body.light .badge{background:#fff;border-color:#e9e9e9;color:#444}
body.light .footer{border-top:1px solid var(--line-light);color:#555}