:root{
  --bg:#0d0d0e; --bg2:#141416; --card:#18181b; --line:#2a2a2e;
  --gold:#c9a96a; --gold2:#e6cf9c; --text:#ece7dc; --muted:#9a9588;
  --danger:#d96b6b; --ok:#6bbf8a;
  --serif:'Cormorant Garamond','Times New Roman',serif;
  --sans:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--sans);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* ---------- Header ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(13,13,14,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-family:var(--serif);font-size:28px;font-weight:600;letter-spacing:.14em;color:var(--gold2)}
.logo span{color:var(--text);font-weight:500}
.top nav{display:flex;gap:26px;align-items:center;font-size:13px;letter-spacing:.12em;text-transform:uppercase}
.top nav a{color:var(--muted);transition:color .2s}
.top nav a:hover{color:var(--gold2)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:110px 0 90px;text-align:center;overflow:hidden;
  background:radial-gradient(900px 400px at 50% -10%,rgba(201,169,106,.16),transparent 70%),
  linear-gradient(180deg,#101012,var(--bg))}
.hero:before{content:"";position:absolute;inset:0;opacity:.05;
  background-image:repeating-linear-gradient(135deg,#fff 0 1px,transparent 1px 22px)}
.hero .wrap{position:relative}
.eyebrow{color:var(--gold);letter-spacing:.4em;font-size:12px;text-transform:uppercase}
.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(38px,6vw,68px);line-height:1.1;margin:18px 0 20px}
.hero h1 em{color:var(--gold2);font-style:italic}
.hero p{color:var(--muted);max-width:560px;margin:0 auto 34px}
.btn{display:inline-block;padding:13px 30px;border:1px solid var(--gold);color:var(--gold2);letter-spacing:.14em;text-transform:uppercase;font-size:12px;cursor:pointer;background:transparent;transition:.25s}
.btn:hover{background:var(--gold);color:#111}
.btn.solid{background:var(--gold);color:#111}
.btn.solid:hover{background:var(--gold2)}
.btn.sm{padding:8px 16px;font-size:11px}
.btn.danger{border-color:var(--danger);color:var(--danger)}
.btn.danger:hover{background:var(--danger);color:#111}

/* ---------- Catalog ---------- */
.section{padding:70px 0}
.sec-title{font-family:var(--serif);font-size:36px;font-weight:500;text-align:center}
.sec-sub{text-align:center;color:var(--muted);margin:6px 0 34px}
.tools{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;margin-bottom:30px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:8px 18px;border:1px solid var(--line);color:var(--muted);font-size:13px;cursor:pointer;background:transparent;transition:.2s}
.chip:hover{border-color:var(--gold);color:var(--gold2)}
.chip.on{background:var(--gold);border-color:var(--gold);color:#111}
.search{background:var(--bg2);border:1px solid var(--line);padding:10px 16px;min-width:240px;outline:none}
.search:focus{border-color:var(--gold)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:22px}
.card{background:var(--card);border:1px solid var(--line);transition:.3s;display:flex;flex-direction:column}
.card:hover{border-color:var(--gold);transform:translateY(-4px);box-shadow:0 14px 30px rgba(0,0,0,.45)}
.card .ph{aspect-ratio:1/1;background:#1d1d21;overflow:hidden;position:relative}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .ph img{transform:scale(1.06)}
.noimg{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:44px;color:var(--gold);background:linear-gradient(135deg,#1b1b1f,#101012)}
.badge{position:absolute;top:12px;left:12px;background:var(--gold);color:#111;font-size:11px;letter-spacing:.1em;padding:3px 10px;text-transform:uppercase}
.card .info{padding:16px 18px 20px}
.card .cat{font-size:11px;letter-spacing:.2em;color:var(--gold);text-transform:uppercase}
.card h3{font-family:var(--serif);font-size:21px;font-weight:500;line-height:1.3;margin:4px 0 8px}
.price{color:var(--gold2);font-weight:600}
.price s{color:var(--muted);font-weight:400;margin-left:8px;font-size:13px}
.empty{text-align:center;color:var(--muted);padding:60px 0;grid-column:1/-1}

/* ---------- Product detail ---------- */
.pd{display:grid;grid-template-columns:1.1fr 1fr;gap:46px;padding:46px 0}
.gal .main{aspect-ratio:1/1;background:#1d1d21;border:1px solid var(--line);overflow:hidden}
.gal .main img{width:100%;height:100%;object-fit:contain}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.thumbs img{width:76px;height:76px;object-fit:cover;border:1px solid var(--line);cursor:pointer;opacity:.7}
.thumbs img.on,.thumbs img:hover{border-color:var(--gold);opacity:1}
.pd h1{font-family:var(--serif);font-size:clamp(30px,4vw,42px);font-weight:500;line-height:1.2;margin:8px 0 14px}
.pd .price{font-size:26px}
.pd .desc{margin:22px 0;color:#cfc9bd}
.specs{list-style:none;border-top:1px solid var(--line);margin:18px 0}
.specs li{padding:10px 0;border-bottom:1px solid var(--line);color:#cfc9bd}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.video{margin-top:36px}
.video .frame{position:relative;aspect-ratio:16/9;border:1px solid var(--line)}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.crumb{color:var(--muted);font-size:13px;padding-top:26px}
.crumb a:hover{color:var(--gold2)}

/* ---------- Forms (tài khoản / admin) ---------- */
.box{max-width:420px;margin:70px auto;background:var(--card);border:1px solid var(--line);padding:34px}
.box h2{font-family:var(--serif);font-weight:500;font-size:30px;margin-bottom:6px}
label{display:block;font-size:12px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;margin:14px 0 6px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],select,textarea{
  width:100%;background:var(--bg2);border:1px solid var(--line);padding:10px 12px;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--gold)}
textarea{min-height:90px;resize:vertical}
.msg{margin-top:12px;font-size:13px;color:var(--danger);min-height:18px}
.msg.ok{color:var(--ok)}
.tabs-sm{display:flex;gap:6px;margin-bottom:10px}
.notice{background:#241f14;border:1px solid var(--gold);padding:14px 16px;color:var(--gold2);font-size:14px}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line);background:var(--bg2);padding:46px 0 90px;margin-top:40px}
footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px}
footer h4{font-family:var(--serif);font-size:20px;color:var(--gold2);margin-bottom:10px;font-weight:500}
footer p,footer a{color:var(--muted);font-size:14px;display:block;margin:4px 0}
footer a:hover{color:var(--gold2)}
.copy{text-align:center;color:#5c5850;font-size:12px;margin-top:34px}

/* ---------- Nút liên hệ nổi ---------- */
.fab{position:fixed;right:16px;bottom:18px;z-index:90;display:flex;flex-direction:column;gap:10px}
.fab a{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px rgba(0,0,0,.5);transition:transform .2s;position:relative}
.fab a:hover{transform:scale(1.1)}
.fab svg{width:26px;height:26px;fill:#fff}
.fab .z{background:#0068ff;font-weight:700;font-size:13px;color:#fff;font-family:var(--sans)}
.fab .m{background:linear-gradient(135deg,#00b2ff,#a033ff 60%,#ff5280)}
.fab .p{background:#2e9e5b;animation:ring 2.4s infinite}
.fab a span.tip{position:absolute;right:62px;background:#000;color:#fff;font-size:12px;padding:4px 10px;border-radius:4px;white-space:nowrap;opacity:0;pointer-events:none;transition:.2s}
.fab a:hover span.tip{opacity:1}
@keyframes ring{0%{box-shadow:0 0 0 0 rgba(46,158,91,.6)}70%{box-shadow:0 0 0 14px rgba(46,158,91,0)}100%{box-shadow:0 0 0 0 rgba(46,158,91,0)}}

/* ---------- Admin ---------- */
.adm-head{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--line);flex-wrap:wrap;gap:10px}
.adm-tabs{display:flex;gap:6px;flex-wrap:wrap;margin:22px 0}
.tb{padding:9px 20px;border:1px solid var(--line);background:transparent;cursor:pointer;color:var(--muted);font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.tb.on{background:var(--gold);border-color:var(--gold);color:#111}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{color:var(--gold);font-weight:500;font-size:12px;letter-spacing:.1em;text-transform:uppercase}
td img.t{width:48px;height:48px;object-fit:cover;border:1px solid var(--line)}
.row-actions{display:flex;gap:6px;flex-wrap:wrap}
.pill{font-size:11px;padding:2px 10px;border:1px solid var(--line);color:var(--muted)}
.pill.on{border-color:var(--ok);color:var(--ok)}
dialog{background:var(--card);color:var(--text);border:1px solid var(--gold);padding:26px;width:min(720px,94vw);max-height:92vh;overflow:auto;margin:auto}
dialog::backdrop{background:rgba(0,0,0,.75)}
.frm2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.imgs{display:flex;flex-wrap:wrap;gap:12px;margin:10px 0}
.imgs .im{width:112px;border:1px solid var(--line);background:var(--bg2);padding:6px}
.imgs .im img{width:100%;height:92px;object-fit:cover}
.imgs .im div{display:flex;justify-content:space-between;margin-top:6px}
.imgs .im button{background:none;border:1px solid var(--line);color:var(--muted);cursor:pointer;padding:2px 8px}
.imgs .im button:hover{border-color:var(--gold);color:var(--gold2)}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:26px}
.stat{background:var(--card);border:1px solid var(--line);padding:18px}
.stat b{display:block;font-family:var(--serif);font-size:34px;color:var(--gold2);font-weight:500}
.stat span{color:var(--muted);font-size:12px;letter-spacing:.1em;text-transform:uppercase}
.bars{display:flex;align-items:flex-end;gap:4px;height:170px;border-bottom:1px solid var(--line);padding:8px 0 0}
.bars div{flex:1;background:var(--gold);min-height:2px;position:relative;opacity:.85}
.bars div:hover{opacity:1}
.bars div:hover:after{content:attr(data-t);position:absolute;bottom:100%;left:50%;transform:translateX(-50%);background:#000;color:#fff;font-size:11px;padding:3px 8px;white-space:nowrap;margin-bottom:4px}
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);background:var(--gold);color:#111;padding:10px 22px;opacity:0;transition:.3s;z-index:200;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%)}
[hidden]{display:none!important}

@media(max-width:820px){
  .pd{grid-template-columns:1fr;gap:26px}
  .top nav{gap:14px;font-size:11px}
  .frm2{grid-template-columns:1fr}
  .hero{padding:70px 0 56px}
  .search{min-width:0;width:100%}
  .tbl-wrap{overflow-x:auto}
}