:root{
  --red:#9E191D;--red2:#7a1014;--deep:#3d070a;--gold:#C9A45F;--gold2:#E9C987;--cream:#FFF8EC;
  --ink:#1f1a17;--muted:#6b625b;--line:#eadfce;--bg:#fff;--soft:#faf6f0;
  --serif:'Playfair Display',Georgia,serif;--sans:'Be Vietnam Pro',system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--sans);color:var(--ink);background:var(--soft);line-height:1.6;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(1200px,100% - 32px);margin:0 auto}
.gold-text{background:linear-gradient(180deg,#fff3d1,#e9c987 45%,#b98a3e);-webkit-background-clip:text;background-clip:text;color:transparent}

header.nav{position:sticky;top:0;z-index:50;background:rgba(122,16,20,.97);box-shadow:0 2px 18px rgba(0,0,0,.18)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:12px}
.nav .logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700}
.nav .logo img{height:44px;width:auto}
.nav .logo span{font-size:13px;line-height:1.2;color:var(--gold2)}
.hot{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(180deg,#f3d896,#c9a45f);color:var(--deep);font-weight:800;padding:9px 16px;border-radius:40px;font-size:15px;white-space:nowrap;border:0;cursor:pointer}

.hero{background:radial-gradient(ellipse at 50% 0,#b3242a,var(--red2) 55%,var(--deep));color:#fff;padding:48px 0 70px;text-align:center}
.hero h1{font-family:var(--serif);font-size:clamp(30px,5vw,52px);line-height:1.15;margin-bottom:10px}
.hero p{color:#f3e2c0;max-width:640px;margin:0 auto}
.stats{display:flex;justify-content:center;gap:28px;margin-top:22px;flex-wrap:wrap}
.stats b{display:block;font-size:28px;color:var(--gold2);font-family:var(--serif)}
.stats span{font-size:13px;color:#f3e2c0}

.filter{background:#fff;border-radius:16px;box-shadow:0 10px 30px rgba(61,7,10,.12);padding:16px;margin:-40px auto 28px;display:grid;grid-template-columns:repeat(5,1fr);gap:10px;position:relative}
.filter select,.filter input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:14px;background:#fff}
.filter button{background:var(--red);color:#fff;border:0;border-radius:10px;font:inherit;font-weight:700;cursor:pointer}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding-bottom:50px}
.card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 18px rgba(61,7,10,.08);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(61,7,10,.16)}
.card .img{aspect-ratio:4/3;background:linear-gradient(135deg,var(--red2),var(--deep));position:relative;overflow:hidden}
.card .img img{width:100%;height:100%;object-fit:cover}
.card .img .noimg{position:absolute;inset:0;display:grid;place-items:center;color:var(--gold2);font-family:var(--serif);font-size:30px}
.card .badges{position:absolute;top:10px;left:10px;display:flex;gap:6px}
.badge{font-size:12px;font-weight:700;padding:4px 10px;border-radius:20px;background:#fff;color:var(--ink);white-space:nowrap}
.badge.dq{background:linear-gradient(180deg,#f3d896,#c9a45f);color:var(--deep)}
.badge.kg{background:#fff;color:var(--red)}
.badge.coc{background:#e98a1e;color:#fff}
.badge.ban{background:#555;color:#fff}
.badge.lk{background:#eee}
.card .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.card h3{font-size:17px;line-height:1.35}
.card .loc{font-size:13px;color:var(--muted)}
.card .specs{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13px;color:var(--muted);margin-top:2px}
.card .specs b{color:var(--ink)}
.card .price{margin-top:auto;padding-top:8px;display:flex;justify-content:space-between;align-items:baseline;border-top:1px dashed var(--line)}
.card .price b{font-size:22px;color:var(--red);font-family:var(--serif)}
.card .price span{font-size:12px;color:var(--muted)}
.card.sold{opacity:.6}
.empty{text-align:center;padding:60px 0;color:var(--muted)}

/* chi tiết */
.detail{display:grid;grid-template-columns:1.4fr 1fr;gap:28px;padding:28px 0 60px}
.detail>div{min-width:0}
.gallery .main{border-radius:16px;overflow:hidden;background:#000;aspect-ratio:4/3}
.gallery .main img{width:100%;height:100%;object-fit:contain}
.gallery .thumbs{display:flex;gap:8px;margin-top:8px;overflow-x:auto}
.gallery .thumbs img{width:86px;height:64px;object-fit:cover;border-radius:8px;cursor:pointer;opacity:.7;flex:none}
.gallery .thumbs img.on{opacity:1;outline:2px solid var(--gold)}
.box{background:#fff;border-radius:16px;padding:20px;box-shadow:0 4px 18px rgba(61,7,10,.06)}
.box+.box{margin-top:16px}
.detail h1{font-family:var(--serif);font-size:28px;line-height:1.25;margin:8px 0 4px}
.bigprice{font-size:34px;font-weight:800;color:var(--red);font-family:var(--serif)}
.spec-table{width:100%;border-collapse:collapse;font-size:15px}
.spec-table td{padding:9px 0;border-bottom:1px solid var(--line)}
.spec-table td:first-child{color:var(--muted);width:45%}
.spec-table td:last-child{font-weight:600;text-align:right}
.box h2{font-size:17px;margin-bottom:10px;color:var(--red2)}
.box ul{list-style:none;display:grid;gap:8px}
.box li{padding-left:24px;position:relative}
.box li:before{content:'✦';position:absolute;left:0;color:var(--gold)}
.cta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.cta a{text-align:center;padding:13px;border-radius:12px;font-weight:800}
.cta .call{background:var(--red);color:#fff}
.cta .zalo{background:#0068ff;color:#fff}
.sticky-cta{display:none}

footer{background:var(--deep);color:#e9d8b8;padding:26px 0;font-size:14px;text-align:center}
footer b{color:var(--gold2)}

@media (max-width:900px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .filter{grid-template-columns:1fr 1fr}
  .filter button{grid-column:1/-1;padding:12px}
  .detail{display:flex;flex-direction:column;gap:16px}
  .detail>div:first-child{display:contents}
  .gallery{order:1}.detail>div:last-child{order:2}.detail .box{order:3;margin:0!important}
}
@media (max-width:560px){
  .grid{grid-template-columns:1fr}
  .nav .logo span{display:none}
  .nav .logo img{height:36px}
  .hot{padding:8px 12px;font-size:14px}
  .detail h1{font-size:23px}
  .sticky-cta{display:grid;grid-template-columns:1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:60}
  .sticky-cta a{padding:14px;text-align:center;font-weight:800;color:#fff}
  body.has-sticky{padding-bottom:52px}
}