:root{
  --ink:#0f1117; --ink2:#171a22;
  --bg:#f3f4f8; --surface:#ffffff; --surface2:#f7f8fc;
  --line:#e6e8f0; --line2:#d6d9e6;
  --primary:#4f46e5; --primary2:#6366f1; --primary-ink:#3730a3; --primary-soft:#ecebfd;
  --stock:#0ea371; --stock-soft:#e3f6ee;
  --warn:#b45309; --danger:#e11d48; --danger-soft:#fde7ec;
  --muted:#6b7180; --muted2:#9aa0b0;
  --r-lg:16px; --r:12px; --r-sm:9px;
  --sh:0 1px 2px rgba(16,17,30,.05), 0 10px 28px -16px rgba(16,17,30,.28);
  --sh-sm:0 1px 2px rgba(16,17,30,.06);
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.5;font-size:15px}
.hidden{display:none!important}
.muted{color:var(--muted);font-size:13px}
.mono{font-family:var(--mono)}

/* ---------- Nút / input / card dùng chung ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:10px 18px;
  border:1px solid var(--primary);background:var(--primary);color:#fff;border-radius:var(--r-sm);
  font-size:14px;font-weight:600;cursor:pointer;text-decoration:none;transition:transform .05s,box-shadow .15s,background .15s,border-color .15s}
.btn:hover{background:var(--primary-ink);border-color:var(--primary-ink)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.45;cursor:not-allowed;background:var(--muted2);border-color:var(--muted2)}
.btn.lg{padding:13px 22px;font-size:15px;width:100%}
.btn.sm{padding:6px 11px;font-size:12px;border-radius:8px}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line2)}
.btn.ghost:hover{background:var(--surface2);color:var(--ink);border-color:var(--muted2)}
.btn.stock{background:var(--stock);border-color:var(--stock)}
.btn.stock:hover{background:#0c8a5f;border-color:#0c8a5f}
.btn.danger{background:#fff;color:var(--danger);border-color:var(--danger-soft)}
.btn.danger:hover{background:var(--danger-soft);border-color:var(--danger)}

label{display:block;font-size:12.5px;font-weight:600;margin:0 0 6px;color:var(--ink2)}
input,textarea,select{width:100%;padding:10px 12px;border:1px solid var(--line2);
  border-radius:var(--r-sm);font-size:14px;font-family:inherit;background:var(--surface2);color:var(--ink)}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);background:#fff}
textarea{resize:vertical;min-height:130px;font-family:var(--mono);font-size:12.5px;line-height:1.55}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh)}
.card + .card{margin-top:14px}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row>*{flex:1;min-width:170px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:720px){.grid2{grid-template-columns:1fr}}
.inline{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.center{max-width:400px;margin:9vh auto 0}
a.link{color:var(--primary);font-size:13px;text-decoration:none}
a.link:hover{text-decoration:underline}
.empty-hint{padding:26px;text-align:center;color:var(--muted);font-size:13px}
.notice{padding:11px 14px;border-radius:var(--r-sm);font-size:13.5px;margin-bottom:14px;font-weight:500}
.notice.err{background:var(--danger-soft);color:var(--danger)}
.notice.ok{background:var(--stock-soft);color:var(--stock)}

/* ==================== TRANG USER ==================== */
.appbar{background:var(--ink);color:#fff;position:sticky;top:0;z-index:20}
.appbar .inner{max-width:1000px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.01em;font-size:16px}
.brand .logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--primary),#7c74ff);display:grid;place-items:center;flex:none;box-shadow:0 2px 10px -2px rgba(79,70,229,.7)}
.brand small{display:block;font-weight:500;font-size:11px;color:#a7a9bd;letter-spacing:.02em;margin-top:1px}
.appbar .right{display:flex;align-items:center;gap:12px}
.appbar a.link{color:#c7c9dd}.appbar a.link:hover{color:#fff}
.wrap{max-width:1000px;margin:0 auto;padding:24px 20px 72px}
h1{font-size:22px;margin:0;letter-spacing:-.02em}
h2{font-size:16px;margin:0 0 4px;letter-spacing:-.01em}

.disp{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;box-shadow:var(--sh);display:flex;flex-direction:column}
.disp .head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.disp .kicker{font-size:12px;color:var(--muted);margin-top:3px}
.disp .count{margin:14px 0 4px;display:flex;align-items:baseline;gap:8px}
.disp .count b{font-family:var(--mono);font-size:44px;font-weight:600;line-height:1;letter-spacing:-.03em;color:var(--stock);font-variant-numeric:tabular-nums}
.disp .count.empty b{color:var(--muted2)}
.disp .count span{font-size:13px;color:var(--muted)}
.disp .action{margin-top:16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.disp .cd{font-family:var(--mono);font-size:13px;color:var(--warn)}
.chiptype{font-size:11px;font-weight:700;padding:3px 9px;border-radius:20px;background:var(--primary-soft);color:var(--primary-ink);letter-spacing:.01em}
.results{margin-top:18px;border-top:1px dashed var(--line2);padding-top:16px}
.results-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;gap:8px;flex-wrap:wrap}
.results-head b{font-size:13px}
.items{display:flex;flex-direction:column;gap:7px;max-height:340px;overflow:auto}
.item{display:flex;align-items:center;gap:10px;background:var(--surface2);border:1px solid var(--line);border-radius:var(--r-sm);padding:9px 11px}
.item .peek{flex:1;font-family:var(--mono);font-size:13px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.01em}
.item .dots{color:var(--muted2);letter-spacing:2px}
.copybtn{border:1px solid var(--line2);background:#fff;border-radius:7px;padding:5px 12px;font-size:12px;font-weight:600;cursor:pointer;flex:none;color:var(--ink)}
.copybtn:hover{border-color:var(--primary);color:var(--primary)}
.copybtn.done{background:var(--stock);color:#fff;border-color:var(--stock)}

/* ==================== SHELL ADMIN ==================== */
.admin-shell{display:flex;min-height:100vh;align-items:stretch}
.sidebar{width:236px;flex:none;background:linear-gradient(180deg,#181b26,#0e1017);color:#cfd2e0;
  position:sticky;top:0;height:100vh;overflow:auto;display:flex;flex-direction:column;padding:18px 14px;gap:6px}
.side-brand{display:flex;align-items:center;gap:11px;padding:6px 8px 14px;font-weight:700;font-size:16px;color:#fff}
.side-brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#8b84ff);display:grid;place-items:center;flex:none;box-shadow:0 4px 14px -4px rgba(99,102,241,.8)}
.side-brand small{display:block;font-weight:500;font-size:11px;color:#8b90a6;margin-top:1px}
.side-nav{display:flex;flex-direction:column;gap:3px;margin-top:6px}
.side-nav a{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:10px;color:#a7abbe;font-size:14px;font-weight:600;text-decoration:none;transition:background .12s,color .12s}
.side-nav a svg{width:18px;height:18px;flex:none;opacity:.85}
.side-nav a:hover{background:rgba(255,255,255,.06);color:#e9eaf2}
.side-nav a.active{background:linear-gradient(90deg,rgba(99,102,241,.22),rgba(99,102,241,.08));color:#fff;box-shadow:inset 2px 0 0 var(--primary2)}
.side-nav a.active svg{opacity:1;color:#c7c9ff}
.side-foot{margin-top:auto;padding:12px 10px 2px;font-size:11px;color:#6a6f83;border-top:1px solid rgba(255,255,255,.06)}

.content{flex:1;min-width:0;padding:0 30px 70px}
.content-inner{max-width:1120px;margin:0 auto;width:100%}
.topbar{position:sticky;top:0;z-index:10;background:rgba(243,244,248,.82);backdrop-filter:saturate(160%) blur(8px);
  display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 0;margin-bottom:6px;border-bottom:1px solid var(--line)}
.topbar-title{font-size:18px;font-weight:700;letter-spacing:-.02em}
.topbar .right{display:flex;align-items:center;gap:12px}

#toast{position:fixed;right:22px;bottom:22px;z-index:60;margin:0;box-shadow:var(--sh);min-width:220px;max-width:360px}

.sec{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;box-shadow:var(--sh);margin-top:18px;scroll-margin-top:78px}
.sec-h{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.sec-ic{width:38px;height:38px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;flex:none}
.sec-ic svg{width:20px;height:20px}
.sec-h b{display:block;font-size:15px;letter-spacing:-.01em}
.sec-h small{display:block;font-size:12px;color:var(--muted)}
.divider{border-top:1px dashed var(--line2);margin:16px 0}

/* thẻ số liệu */
.stats{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
@media(max-width:820px){.stats{grid-template-columns:repeat(2,1fr)!important}}
.stat{background:var(--surface2);border:1px solid var(--line);border-radius:var(--r);padding:15px 16px;position:relative;overflow:hidden;transition:transform .1s,box-shadow .15s}
.stat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--muted2)}
.stat.hi::before{background:var(--stock)}
.stat:hover{transform:translateY(-2px);box-shadow:var(--sh)}
.stat b{display:block;font-family:var(--mono);font-size:26px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.1}
.stat.hi b{color:var(--stock)}
.stat span{font-size:11.5px;color:var(--muted)}

/* danh sách loại hàng (rows do JS render) */
#typeList .row[data-id]{background:var(--surface2);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;box-shadow:var(--sh-sm)}
#typeList .row[data-id] input{background:#fff}

/* bảng key */
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
th{color:var(--muted);font-weight:600;font-size:11.5px;letter-spacing:.03em;text-transform:uppercase}
tbody tr:hover{background:var(--surface2)}
.tag{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:700}
.tag.on{background:var(--stock-soft);color:var(--stock)}
.tag.off{background:var(--danger-soft);color:var(--danger)}

/* xem kho */
.stocklist{max-height:440px;overflow:auto;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface2)}
.stockrow{display:flex;gap:10px;align-items:flex-start;padding:9px 12px;border-bottom:1px solid var(--line)}
.stockrow:last-child{border-bottom:none}
.stockrow:hover{background:#fff}
.stockrow .idx{font-family:var(--mono);font-size:11px;color:var(--muted2);flex:none;width:40px;padding-top:3px}
.stockrow .full{flex:1;font-family:var(--mono);font-size:12px;word-break:break-all;line-height:1.55}

/* login admin */
.auth{min-height:100vh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(1200px 500px at 50% -10%,rgba(99,102,241,.14),transparent),var(--bg)}
.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh)}
.auth-logo{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--primary),#8b84ff);display:grid;place-items:center;margin-bottom:16px;box-shadow:0 8px 22px -8px rgba(99,102,241,.7)}

@media(max-width:900px){
  .admin-shell{flex-direction:column}
  .sidebar{width:auto;height:auto;position:sticky;top:0;flex-direction:column;padding:12px 14px}
  .side-nav{flex-direction:row;overflow-x:auto;gap:6px;padding-bottom:2px}
  .side-nav a{white-space:nowrap;padding:8px 12px}
  .side-foot{display:none}
  .content{padding:0 16px 60px}
}

/* ---------- Modal chi tiết ---------- */
.modal-overlay{position:fixed;inset:0;z-index:80;background:rgba(15,17,23,.5);
  display:grid;place-items:center;padding:20px;backdrop-filter:blur(2px)}
.modal{width:100%;max-width:min(660px,94vw);background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:0 24px 60px -20px rgba(16,17,30,.5);overflow:hidden}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;
  padding:18px 20px;border-bottom:1px solid var(--line)}
.modal-head b{font-size:16px;letter-spacing:-.01em}
.modal-head small{display:block;margin-top:2px}
.modal-close{border:none;background:transparent;font-size:26px;line-height:1;cursor:pointer;color:var(--muted);padding:0 4px}
.modal-close:hover{color:var(--ink)}
.modal-body{padding:8px 20px 20px}
.modal-body table{margin-top:4px}
.modal-body .today-row{background:var(--primary-soft)}
.modal-body td .n{font-family:var(--mono);font-variant-numeric:tabular-nums}
.modal-body .tot{font-weight:700}
.modal-body tfoot td{border-top:2px solid var(--line2);border-bottom:none;padding-top:10px}
.modal-body tfoot .grand{font-weight:700}