:root {
  /* Sáng — theo HCboss: nền lạnh, nhấn đồng + xanh nước, chữ navy */
  --bg: #F4F6F8; --card: #FFFFFF; --surface-2: #EDF1F4; --border: #DCE3E9; --border-2: #E7ECF1;
  --text: #14293D; --muted: #5F7183; --muted-2: #8698A8;
  --primary: #C2782A; --primary-dark: #A9661F; --primary-soft: #F5E7D5;
  --water: #1C7686; --water-soft: #DCEDEF;
  --green: #2E7D57; --green-soft: #DBEFE4; --red: #C0392B; --red-soft: #F7E0DD;
  --amber: #B7841D; --amber-soft: #F5EBD2; --blue: #1C7686; --blue-soft: #DCEDEF;
  --purple: #7c3aed; --purple-soft: #ede9fe; --dark: #14293D;
  --radius: 12px; --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20,41,61,.06), 0 8px 24px rgba(20,41,61,.05);
  --shadow-md: 0 2px 4px rgba(20,41,61,.07), 0 16px 32px rgba(20,41,61,.10);
  --shadow-lg: 0 18px 50px rgba(20,41,61,.22);
}
/* Tối — theo HCboss dark */
:root[data-theme="dark"] {
  --bg: #0E1620; --card: #16212E; --surface-2: #1E2C3B; --border: #2A3B4D; --border-2: #243544;
  --text: #E7EDF3; --muted: #8698A8; --muted-2: #6C7E8F;
  --primary: #E0964A; --primary-dark: #C9803A; --primary-soft: #33261A;
  --water: #45A6B8; --water-soft: #16303A;
  --green: #4FB07E; --green-soft: #153026; --red: #E5695C; --red-soft: #3A211E;
  --amber: #E0A94A; --amber-soft: #33291A; --blue: #45A6B8; --blue-soft: #16303A;
  --purple: #A889F0; --purple-soft: #241A33; --dark: #0E1620;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.28);
  --shadow-md: 0 2px 4px rgba(0,0,0,.35), 0 16px 32px rgba(0,0,0,.45);
  --shadow-lg: 0 18px 50px rgba(0,0,0,.6);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14.5px; line-height: 1.5; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { margin: 0; font-weight: 650; letter-spacing: -.01em; }
a { color: inherit; }
.hidden { display: none !important; }
::selection { background: color-mix(in srgb, var(--primary) 26%, transparent); color: var(--text); }
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; border: 2.5px solid var(--bg); background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: var(--muted-2); }

/* ---------- HEADER (appbar) ---------- */
.appbar { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 12px; padding: 10px 22px; background: color-mix(in srgb, var(--card) 88%, transparent); backdrop-filter: saturate(180%) blur(10px); border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.logo-mark { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(150deg, var(--water), var(--primary)); display: grid; place-items: center; font-size: 19px; flex: none; box-shadow: 0 5px 14px rgba(194,120,42,.3); }
.brand-txt b { font-size: 15.5px; font-weight: 750; letter-spacing: -.02em; display: block; line-height: 1.15; }
.brand-txt small { color: var(--muted); font-size: 11.5px; font-weight: 500; }
.live { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); white-space: nowrap; }
.who-badge { display: flex; align-items: center; gap: 9px; padding: 4px 5px 4px 13px; border: 1px solid var(--border); border-radius: 999px; background: var(--card); }
.who-badge .user-meta { text-align: right; }
.icon-btn { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border); background: var(--card); color: var(--muted); cursor: pointer; font-size: 16px; transition: .15s; flex: none; }
.icon-btn:hover { color: var(--text); border-color: var(--muted); }
.icon-btn:active { transform: translateY(1px); }
.user-avatar { width: 30px; height: 30px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; font-weight: 700; font-size: 13px; flex-shrink: 0; }
.user-name { color: var(--text); font-weight: 650; font-size: 13px; line-height: 1.15; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 150px; }
.user-role { color: var(--muted); font-size: 11px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted-2); }
.dot.on { background: var(--green); box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 22%, transparent); }
.nav-badge { background: var(--water); color: #fff; font-size: 10.5px; font-weight: 700; padding: 0 7px; border-radius: 20px; margin-left: 3px; }

/* ---------- NAV NGANG (tabs) ---------- */
.topnav { position: sticky; top: 56px; z-index: 40; display: flex; gap: 2px; padding: 0 16px; background: var(--card); border-bottom: 1px solid var(--border); overflow-x: auto; }
.topnav .nav-item { appearance: none; border: 0; background: none; cursor: pointer; padding: 13px 15px; font-size: 14px; font-weight: 600; color: var(--muted); border-bottom: 2.5px solid transparent; white-space: nowrap; font-family: inherit; transition: color .15s, border-color .15s; display: inline-flex; align-items: center; gap: 6px; }
.topnav .nav-item:hover { color: var(--text); }
.topnav .nav-item.active { color: var(--primary); border-bottom-color: var(--primary); }
.topnav .nav-item.nav-owner.active { color: #c79328; border-bottom-color: #c79328; }
.topnav .nav-item.hidden { display: none; }

/* ---------- MAIN ---------- */
.main { max-width: 1200px; margin: 0 auto; padding: 22px 24px 72px; }
.page-head { display: flex; align-items: flex-end; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.crumb h1 { font-size: 21px; font-weight: 750; letter-spacing: -.02em; }
.crumb p { margin: 3px 0 0; color: var(--muted); font-size: 13.5px; }
.top-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.rate-label { font-size: 13px; color: var(--water); font-weight: 650; white-space: nowrap; }
#rateInput { padding: 8px 11px; border: 1px solid var(--border); border-radius: 9px; font-size: 14px; text-align: right; background: var(--card); color: var(--text); }
#rateInput:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.view { animation: fade .22s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(3px); } to { opacity: 1; transform: none; } }

/* ---------- BUTTONS ---------- */
.btn { appearance: none; border: 1px solid var(--border); background: var(--card); color: var(--text); padding: 9px 15px; border-radius: 9px; cursor: pointer; font-size: 13.5px; font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; transition: transform .12s cubic-bezier(.2,.7,.2,1), filter .15s, border-color .15s, background .15s, color .15s; }
.btn:hover { border-color: var(--muted); color: var(--text); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 86%, #fff), var(--primary)); border-color: transparent; color: #fff; box-shadow: 0 3px 10px rgba(194,120,42,.28); }
.btn.primary:hover { filter: brightness(1.05); color: #fff; }
.btn.ghost { background: transparent; }
.btn.tiny { padding: 5px 10px; font-size: 12px; }
.btn.green { background: linear-gradient(180deg, color-mix(in srgb, var(--green) 86%, #fff), var(--green)); border-color: transparent; color: #fff; box-shadow: 0 3px 10px rgba(46,125,87,.24); }
.btn.green:hover { filter: brightness(1.05); color: #fff; }
.btn.danger:hover { border-color: var(--red); color: var(--red); background: color-mix(in srgb, var(--red) 8%, var(--card)); }
.btn.danger-solid { background: var(--red); border-color: var(--red); color: #fff; }
.btn.danger-solid:hover { filter: brightness(1.05); color: #fff; }
.btn.danger-solid:disabled { opacity: .5; cursor: not-allowed; filter: none; }

/* ---------- OWNER ---------- */
.danger-zone { border: 1px solid color-mix(in srgb, var(--red) 32%, var(--border)); background: color-mix(in srgb, var(--red) 5%, var(--card)); }
.danger-zone .card-head { border-bottom-color: color-mix(in srgb, var(--red) 25%, var(--border)); }
.owner-action { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 20px; border-bottom: 1px solid var(--border-2); }
.owner-action:last-child { border-bottom: none; }
.owner-action .oa-info { flex: 1; }
.owner-action .oa-info .t { font-weight: 650; font-size: 14px; }
.owner-action .oa-info .d { color: var(--muted); font-size: 12.5px; margin-top: 2px; }

/* ---------- CARDS ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: box-shadow .18s ease; }
.card-pad { padding: 20px; }
.card-head { display: flex; align-items: center; justify-content: space-between; padding: 15px 18px; border-bottom: 1px solid var(--border-2); }
.card-head h3 { font-size: 14.5px; font-weight: 700; letter-spacing: -.01em; }
.card-head .sub { color: var(--muted); font-size: 12px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.section-gap { margin-top: 16px; }

/* ---------- KPI ---------- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(214px, 1fr)); gap: 14px; }
.kpi { position: relative; background: linear-gradient(180deg, color-mix(in srgb, var(--tile, transparent) 6%, var(--card)), var(--card)); border: 1px solid var(--border); border-left: 3px solid var(--tile, var(--border)); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px; display: flex; gap: 15px; align-items: flex-start; transition: transform .18s cubic-bezier(.2,.7,.2,1), box-shadow .18s; }
.kpi:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.kpi .kpi-ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 21px; flex-shrink: 0; }
.kpi .kpi-label { color: var(--muted); font-size: 12.5px; font-weight: 600; }
.kpi .kpi-value { font-size: 26px; font-weight: 750; margin-top: 4px; letter-spacing: -.02em; color: var(--text); font-variant-numeric: tabular-nums; }
.kpi .kpi-foot { font-size: 12px; color: var(--muted); margin-top: 4px; }
.i-blue { background: var(--water-soft); color: var(--water); }
.i-green { background: var(--green-soft); color: var(--green); }
.i-amber { background: var(--amber-soft); color: var(--amber); }
.i-purple { background: var(--purple-soft); color: var(--purple); }
.i-red { background: var(--red-soft); color: var(--red); }
.kpi:has(.i-blue) { --tile: var(--water); } .kpi:has(.i-green) { --tile: var(--green); }
.kpi:has(.i-amber) { --tile: var(--amber); } .kpi:has(.i-purple) { --tile: var(--purple); }
.kpi:has(.i-red) { --tile: var(--red); }
.up { color: var(--green); } .down { color: var(--red); }

/* ---------- BADGE / PILL ---------- */
.badge { padding: 3px 10px; border-radius: 999px; font-size: 11.5px; font-weight: 650; display: inline-block; }
.badge.in_stock { background: var(--green-soft); color: var(--green); }
.badge.sold { background: var(--red-soft); color: var(--red); }
.badge.reserved { background: var(--amber-soft); color: var(--amber); }
.badge.returned { background: var(--surface-2); color: var(--muted); }
.badge.lost { background: var(--red-soft); color: var(--red); text-decoration: line-through; }
.badge.new { background: var(--purple-soft); color: var(--purple); }
.badge.import { background: var(--water-soft); color: var(--water); }
.badge.export { background: var(--red-soft); color: var(--red); }
.badge.update { background: var(--surface-2); color: var(--muted); }

/* ---------- TABLE ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 11px 15px; border-bottom: 1px solid var(--border-2); white-space: nowrap; font-size: 13.5px; }
th { color: var(--muted); font-weight: 650; font-size: 11px; text-transform: uppercase; letter-spacing: .04em; background: color-mix(in srgb, var(--surface-2) 55%, var(--card)); }
tbody tr { transition: background .1s; }
tbody tr:hover { background: var(--surface-2); }
tbody tr:last-child td { border-bottom: none; }
.imei { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 12.5px; }
.money { font-variant-numeric: tabular-nums; font-weight: 650; }
.row-actions { display: flex; gap: 6px; }
.muted { color: var(--muted); }
.empty { color: var(--muted); text-align: center; padding: 44px 20px; }
.empty .big { font-size: 34px; display: block; margin-bottom: 8px; opacity: .6; }

/* ---------- TOOLBAR ---------- */
.filters { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
input, select, textarea { font-family: inherit; }
.filters input, .filters select, .modal input, .modal select { background: var(--card); border: 1px solid var(--border); color: var(--text); padding: 9px 12px; border-radius: 9px; font-size: 13.5px; outline: none; transition: border-color .15s, box-shadow .15s; }
.filters input:focus, .modal input:focus, .modal select:focus, .filters select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.search { flex: 1; min-width: 220px; }
.count { color: var(--muted); font-size: 13px; }

/* checkbox + bulk bar */
.chk { width: 16px; height: 16px; cursor: pointer; accent-color: var(--primary); }
.bulk-bar { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; padding: 11px 15px; background: var(--water-soft); border: 1px solid color-mix(in srgb, var(--water) 26%, transparent); border-radius: 12px; }
.bulk-bar.hidden { display: none; }
.bulk-bar b { color: var(--water); }
.warr-ok { color: var(--green); font-weight: 600; }
.warr-soon { color: var(--amber); font-weight: 600; }
.warr-exp { color: var(--red); font-weight: 600; }
.tag-origin { background: var(--water-soft); color: var(--water); padding: 2px 8px; border-radius: 6px; font-size: 11.5px; font-weight: 650; }

/* locate banner */
.locate-banner { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 16px; border-radius: 12px; margin-bottom: 14px; font-size: 13.5px; flex-wrap: wrap; }
.locate-banner.ok { background: var(--green-soft); border: 1px solid color-mix(in srgb, var(--green) 32%, transparent); color: var(--green); }
.locate-banner.warn { background: var(--amber-soft); border: 1px solid color-mix(in srgb, var(--amber) 32%, transparent); color: var(--amber); }
.locate-banner b { color: var(--text); }
.locate-banner .imei { font-family: ui-monospace, "SF Mono", Menlo, monospace; }
@keyframes flashCell { 0%, 25% { background: var(--primary-soft); } 100% { background: transparent; } }
tbody tr.flash > td { animation: flashCell 3.2s ease-out; }

/* tổng kết đơn bán */
.sell-summary { margin-top: 14px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.sell-summary .ss-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; font-size: 14px; border-bottom: 1px solid var(--border-2); }
.sell-summary .ss-row:last-child { border-bottom: none; }
.sell-summary .ss-total { font-size: 17px; color: var(--primary); }
.sell-summary .ss-debt { background: var(--red-soft); }
.sell-summary .ss-debt b { color: var(--red); font-size: 17px; }
.sell-summary .ss-ok { background: var(--green-soft); }
.sell-summary .ss-ok b { color: var(--green); font-size: 17px; }
#sellItems table { width: 100%; border-collapse: collapse; }
#sellItems th, #sellItems td { padding: 8px 10px; border-bottom: 1px solid var(--border-2); font-size: 13px; text-align: left; }
#sellItems input { border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; font-size: 13px; background: var(--card); color: var(--text); }

/* ---------- CHARTS ---------- */
.chart { width: 100%; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 14px; padding: 12px 20px 4px; }
.chart-legend .lg { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--muted); }
.chart-legend .sw { width: 10px; height: 10px; border-radius: 3px; }
.donut-wrap { display: flex; align-items: center; gap: 24px; padding: 20px; }
.bars { padding: 8px 20px 20px; display: flex; flex-direction: column; gap: 12px; }
.bar-row { display: grid; grid-template-columns: 130px 1fr auto; align-items: center; gap: 12px; font-size: 13px; }
.bar-track { background: var(--surface-2); border-radius: 6px; height: 12px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 6px; transition: width .5s cubic-bezier(.2,.7,.2,1); }

/* ---------- ACTIVITY / FEED ---------- */
.feed { padding: 4px 0; }
.feed-item { display: flex; gap: 12px; padding: 11px 20px; align-items: center; border-bottom: 1px solid var(--border-2); }
.feed-item:last-child { border-bottom: none; }
.feed-ic { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; flex-shrink: 0; }
.feed-main { flex: 1; min-width: 0; }
.feed-main .t { font-weight: 600; font-size: 13px; }
.feed-main .s { color: var(--muted); font-size: 12.5px; }
.feed-time { color: var(--muted-2); font-size: 12px; white-space: nowrap; }

/* ---------- DEVICE CARDS ---------- */
.dev-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.dev-card { border: 1px solid var(--border); border-left-width: 4px; border-radius: 12px; padding: 16px; background: var(--card); box-shadow: var(--shadow); }
.dev-card.found { border-left-color: var(--green); }
.dev-card.notfound { border-left-color: var(--amber); }
.dev-card h4 { font-size: 16px; margin-bottom: 10px; }
.dev-card .r { display: flex; justify-content: space-between; padding: 4px 0; font-size: 13px; color: var(--muted); }
.dev-card .r b { color: var(--text); }
.dev-card .cta { margin-top: 12px; display: flex; gap: 8px; }
.hint-box { background: var(--amber-soft); color: var(--amber); border: 1px solid color-mix(in srgb, var(--amber) 30%, transparent); border-radius: 12px; padding: 14px 18px; font-size: 13px; margin-bottom: 18px; }
.hint-box b { color: var(--text); }
.hint-box code { background: color-mix(in srgb, var(--text) 8%, transparent); padding: 2px 7px; border-radius: 5px; }

/* ---------- DROPZONE ---------- */
.drop { border: 2px dashed var(--border); border-radius: 14px; padding: 34px; text-align: center; color: var(--muted); cursor: pointer; transition: .15s; }
.drop:hover, .drop.over { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); }
.drop .big { font-size: 34px; display: block; margin-bottom: 8px; }
.import-result { margin-top: 16px; }

/* ---------- MODAL ---------- */
.modal { position: fixed; inset: 0; background: rgba(10,20,30,.55); backdrop-filter: blur(3px); display: flex; align-items: center; justify-content: center; z-index: 60; padding: 20px; animation: modalIn .12s ease-out; }
@keyframes modalIn { from { opacity: 0; } to { opacity: 1; } }
.modal-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; width: min(720px, 96vw); max-height: 92vh; overflow: auto; box-shadow: var(--shadow-lg); }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 18px 22px; border-bottom: 1px solid var(--border-2); }
.modal-head h3 { font-size: 16.5px; font-weight: 700; }
.x { background: none; border: none; font-size: 18px; color: var(--muted); cursor: pointer; border-radius: 8px; width: 30px; height: 30px; }
.x:hover { background: var(--surface-2); color: var(--text); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 20px 22px; }
.grid label { display: flex; flex-direction: column; gap: 6px; font-size: 12.5px; color: var(--muted); font-weight: 600; }
.grid label input, .grid label select { color: var(--text); }
.col-2 { grid-column: 1 / -1; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }
.sell-info { background: var(--surface-2); border: 1px solid var(--border-2); border-radius: 10px; padding: 12px 14px; font-size: 13px; }
.qr-card { text-align: center; }
.qr-card img { width: 250px; height: 250px; padding: 10px; background: #fff; border: 1px solid var(--border); border-radius: 12px; margin: 8px auto; }
.qr-card pre { text-align: left; background: var(--surface-2); margin: 0 22px; padding: 12px; border-radius: 10px; font-size: 12px; overflow: auto; }
.qr-card .modal-actions { padding: 18px 22px; }

/* ---------- TOAST ---------- */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 12px 22px; border-radius: 11px; z-index: 100; box-shadow: var(--shadow-lg); font-size: 13.5px; font-weight: 600; }
.toast.err { background: var(--red); color: #fff; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 760px) {
  .appbar { padding: 8px 12px; gap: 8px; }
  .brand-txt small { display: none; }
  .live { display: none; }
  .who-badge .user-meta { display: none; }
  .who-badge { padding: 3px; border: 0; background: none; }
  .rate-box { display: none; }
  .topnav { top: 50px; }
  .main { padding: 18px 14px 56px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}