* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f2f5f8; --panel: #ffffff; --border: #d9e1e9;
  --text: #17212b; --muted: #5d6f80; --inputBg: #f6f8fa;
  --green: #22c55e; --red: #ef4444; --amber: #f59e0b; --blue: #3b82f6;
}
/* đang quay: giao diện tối đi để dễ quan sát video */
body.recording {
  --bg: #0f1419; --panel: #1a2129; --border: #2c3844;
  --text: #e8edf2; --muted: #8fa0b0; --inputBg: #0c1116;
}
body {
  background: var(--bg); color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  transition: background .35s;
}
.panel, .scanRow input, .setRow select, .setRow input[type=number], header nav a {
  transition: background .35s, color .35s, border-color .35s;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 12px; }
header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; padding: 8px 2px 14px;
}
header h1 { font-size: 17px; font-weight: 700; letter-spacing: .2px; }
header h1 span { color: var(--green); }
header nav a {
  color: var(--muted); text-decoration: none; font-size: 14px;
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 8px;
}
header nav a:hover { color: var(--text); border-color: var(--muted); }

.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 14px; margin-bottom: 12px;
}

/* ---- trang quay ---- */
.videoBox { position: relative; border-radius: 14px; overflow: hidden; background: #000; }
.videoBox canvas { width: 100%; display: block; }
.recBadge {
  position: absolute; top: 10px; left: 10px; display: none;
  align-items: center; gap: 8px; background: rgba(0,0,0,.65);
  padding: 6px 12px; border-radius: 999px; font-size: 14px; font-weight: 600;
}
.recBadge .dot {
  width: 10px; height: 10px; border-radius: 50%; background: var(--red);
  animation: blink 1s infinite;
}
@keyframes blink { 50% { opacity: .2; } }
.recBadge.on { display: flex; }

.scanRow { display: flex; gap: 8px; margin-top: 12px; }
.scanRow input {
  flex: 1; font-size: 18px; padding: 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--inputBg); color: var(--text);
  text-transform: uppercase;
}
.scanRow input:focus { outline: 2px solid var(--green); border-color: transparent; }

.btn {
  font-size: 16px; font-weight: 600; border: none; border-radius: 10px;
  padding: 14px 18px; cursor: pointer; color: #fff; background: var(--blue);
  touch-action: manipulation;
}
.btn:active { transform: scale(.97); }
.btn.green { background: var(--green); color: #06270f; }
.btn.red { background: var(--red); }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--muted); font-weight: 500; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.big { width: 100%; padding: 16px; font-size: 18px; margin-top: 10px; }

.btnRow { display: flex; gap: 10px; margin-top: 10px; }
.btnRow .btn { flex: 1; padding: 16px; font-size: 17px; }

/* chip mã đơn nổi trên khung camera quét */
#scanChip {
  position: absolute; top: 2%; right: 1%; display: none;
  padding: 5px 12px; border-radius: 8px; font-weight: 800; font-size: 15px;
  font-family: ui-monospace, Consolas, monospace; letter-spacing: .5px;
  box-shadow: 0 2px 10px rgba(0,0,0,.4);
}
#scanChip.on { background: #ffd60a; color: #111; }
#scanChip.lost { background: rgba(239,68,68,.92); color: #fff; }

.statusLine { margin-top: 10px; font-size: 14px; color: var(--muted); min-height: 20px; }
.statusLine b { color: var(--text); }
.uploadBadge { color: var(--amber); font-weight: 600; }
.uploadBadge.err { color: var(--red); }
.opts { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 12px; font-size: 14px; color: var(--muted); align-items: center; }
.opts label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.camRow { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.camPick { flex: 1; min-width: 180px; }
.camPick label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 4px; }
.camPick select {
  width: 100%; font-size: 14.5px; padding: 9px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--inputBg); color: var(--text);
}
.hint { font-size: 13px; color: var(--muted); margin-top: 8px; line-height: 1.5; }

/* ---- cài đặt ---- */
.settings h3 { font-size: 16px; margin-bottom: 10px; }
.setGroup { border-top: 1px solid var(--border); padding: 12px 0; }
.setTitle { font-size: 12.5px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); margin-bottom: 10px; font-weight: 700; }
.setRow { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; font-size: 14.5px; }
.setRow > label:first-child { flex: 0 0 200px; color: var(--muted); }
.setRow select, .setRow input[type=number] {
  flex: 1; min-width: 0; font-size: 14.5px; padding: 9px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--inputBg); color: var(--text);
}
.setRow.chk label { display: flex; align-items: center; gap: 8px; cursor: pointer; color: var(--text); }
.setRow.chk input { width: 17px; height: 17px; }
@media (max-width: 560px) {
  .setRow { flex-direction: column; align-items: stretch; gap: 4px; }
  .setRow > label:first-child { flex: none; }
  .setRow.chk { flex-direction: row; }
}

/* ---- admin ---- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; margin-bottom: 12px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.cardLabel { font-size: 12.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; font-weight: 600; }
.cardNum { font-size: 30px; font-weight: 800; margin: 6px 0 2px; }
.cardSub { font-size: 12.5px; color: var(--muted); }
.chart { display: flex; align-items: flex-end; gap: 6px; height: 160px; padding-top: 18px; }
.chartCol { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; min-width: 0; }
.chartVal { font-size: 11.5px; color: var(--muted); margin-bottom: 3px; }
.chartBar { width: 70%; min-height: 2px; background: var(--green); border-radius: 4px 4px 0 0; }
.chartLbl { font-size: 10.5px; color: var(--muted); margin-top: 5px; white-space: nowrap; }
.userTag { font-size: 13px; color: var(--muted); }

/* ---- tra cứu ---- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .4px; }
td .btn { padding: 7px 12px; font-size: 13.5px; }
.code { font-family: ui-monospace, Consolas, monospace; font-weight: 600; }
.playerBox { margin-bottom: 12px; display: none; }
.playerBox.on { display: block; }
.playerBox video { width: 100%; border-radius: 10px; background: #000; }
.playerBox .meta { font-size: 13.5px; color: var(--muted); margin-top: 6px; }
.empty { color: var(--muted); text-align: center; padding: 24px 0; }
@media (max-width: 560px) {
  th.hideM, td.hideM { display: none; }
}