:root {
  --bg: #eef1f5; --card: #fff; --ink: #18212b; --mute: #5d6a78; --line: #d5dbe2; --pri: #1f4e79;
  --ok: #17692f; --okb: #dcf2e3; --warn: #8a4f00; --warnb: #ffecc7; --bad: #a3201a; --badb: #fde0de;
  --guest: #6b5600; --guestb: #fff4b0; --moon: #4f3290; --moonb: #e9e0fa;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.4 system-ui, "Segoe UI", Roboto, sans-serif; }
main { max-width: 520px; margin: 0 auto; padding: 0 16px 96px; } /* chừa chỗ đáy cho nút nổi (Netlify, Android) */
button, input, select { font: inherit; }

.topbar { position: sticky; top: 0; z-index: 3; box-shadow: 0 2px 6px rgba(0,0,0,.12); }
.top { display: flex; justify-content: space-between; align-items: center;
  gap: 8px; padding: 10px 16px; background: var(--pri); color: #fff; }
.top .mute { color: #c9d8e8; font-size: 13px; }
.badge { border: 0; border-radius: 999px; padding: 6px 10px; font-size: 13px; background: #fff; color: var(--ink); white-space: nowrap; }
.badge.ok { background: var(--okb); color: var(--ok); } .badge.bad { background: var(--badb); color: var(--bad); }

section { display: none; } section.on { display: block; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin: 12px 0; }
label { display: block; font-size: 13px; color: var(--mute); margin: 10px 0 4px; }
input, select { width: 100%; padding: 12px; border: 2px solid var(--line); border-radius: 10px; background: #fff; }
input:focus, select:focus { outline: none; border-color: var(--pri); }
#ma, #plate { font-size: 24px; letter-spacing: 1px; }
.inrow { display: flex; gap: 8px; align-items: center; }
.iconbtn { flex: 0 0 52px; height: 52px; border: 2px solid var(--line); border-radius: 10px; background: #fff; font-size: 22px; }
.iconbtn.on { border-color: var(--pri); background: var(--pri); color: #fff; }

.seg { display: flex; gap: 8px; }
.seg button { flex: 1; padding: 14px; font-size: 20px; font-weight: 800; border: 2px solid var(--line); border-radius: 10px; background: #fff; }
.seg button.on { border-color: var(--pri); background: var(--pri); color: #fff; }

.status { font-size: 24px; font-weight: 800; padding: 14px; border-radius: 10px; text-align: center; }
.s-ok { background: var(--okb); color: var(--ok); } .s-guest { background: var(--guestb); color: var(--guest); }
.s-warn { background: var(--warnb); color: var(--warn); } .s-bad { background: var(--badb); color: var(--bad); }
.s-moon { background: var(--moonb); color: var(--moon); }
.result.flash { animation: flash .35s ease-out; }
@keyframes flash { from { transform: scale(.97); opacity: .5; } to { transform: none; opacity: 1; } }
dl { display: grid; grid-template-columns: 92px 1fr; gap: 6px 10px; margin: 12px 0 0; font-size: 18px; }
dt { color: var(--mute); font-size: 15px; align-self: center; } dd { margin: 0; font-weight: 700; }
.err { color: var(--bad); font-weight: 700; margin-top: 8px; }
.mute { color: var(--mute); font-size: 13px; }

.row { display: flex; justify-content: space-between; gap: 10px; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.row:last-child { border-bottom: 0; }
.tag { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 6px; border-radius: 6px; }
.kpi { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.kpi div { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.kpi b { display: block; font-size: 26px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 6px; }
.chips button { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 6px 12px; font-size: 14px; }
.chips button.on { background: var(--pri); border-color: var(--pri); color: #fff; }
.btn { padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: #fff; margin-top: 12px; }
.btn.primary { background: var(--pri); border-color: var(--pri); color: #fff; width: 100%; font-weight: 700; }
.search { font-size: 17px; }
.chk { display: flex; gap: 8px; align-items: center; font-size: 14px; color: var(--ink); }
.chk input { width: auto; }

.tabs { display: flex; background: #fff; border-bottom: 1px solid var(--line); }
.tabs button { flex: 1; padding: 14px 4px; border: 0; background: none; font-size: 14px; color: var(--mute); }
.tabs button.on { color: var(--pri); font-weight: 800; box-shadow: inset 0 -3px 0 var(--pri); }
.log { font-size: 13px; padding: 6px 0; border-bottom: 1px solid var(--line); word-break: break-word; }
.log.bad { color: var(--bad); }
.inrow .btn { flex: 1; }

/* ── Nhận diện xe nhanh: biển số to · loại xe · dải màu ── */
:root { --missing: #6a1b9a; --missing-bg: repeating-linear-gradient(45deg, #6a1b9a 0 10px, #9c4dcc 10px 20px); }
.status { font-size: 20px; padding: 10px; }
.plate { margin: 12px 0 8px; padding: 6px 10px; text-align: center; font: 800 40px/1.15 "Segoe UI", Roboto, Arial, sans-serif;
  letter-spacing: 1px; background: #fff; color: #111; border: 4px solid #111; border-radius: 10px; word-break: break-word; }
.plate.none { font-size: 22px; color: var(--mute); border-color: var(--line); border-style: dashed; }
.plate.missing, .strip.missing, .tag.missing { background: var(--missing-bg); color: #fff; border-color: var(--missing); }
.plate.missing { font-size: 24px; }
.vtype { font-size: 26px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.vicon { font-size: 34px; line-height: 1; }
.vsub, .cname { color: var(--mute); font-size: 15px; }
.cname { font-size: 18px; font-weight: 700; color: var(--ink); }
.strip { display: flex; height: 42px; margin: 10px 0 4px; border: 2px solid #333; border-radius: 10px; overflow: hidden; }
.strip span { flex: 1; }
.strip span + span { border-left: 2px solid rgba(0,0,0,.35); }
.strip.missing { align-items: center; justify-content: center; font-size: 18px; letter-spacing: 1px; }
.remind { margin-top: 8px; padding: 8px 10px; border-radius: 8px; background: #f3e5f5; color: var(--missing); font-weight: 700; }
.who { margin-top: 8px; font-size: 16px; }
.mini { display: inline-flex; width: 42px; height: 12px; margin-right: 6px; vertical-align: middle; border: 1px solid #555; border-radius: 3px; overflow: hidden; }
.mini i { flex: 1; }
.mini.missing { background: var(--missing-bg); }

/* ── Trợ giúp xoá tồn bãi: nút nguy hiểm + hộp xác nhận ── */
.btn.danger { border-color: var(--bad); color: var(--bad); background: #fff; font-weight: 700; }
.btn.danger:not(:disabled) { background: var(--bad); color: #fff; }
.btn:disabled { opacity: .45; }
details.help summary { cursor: pointer; font-weight: 700; color: var(--mute); }
.modal { position: fixed; inset: 0; z-index: 10; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal[hidden] { display: none; }
.modal-box { background: #fff; border: 4px solid var(--bad); border-radius: 14px; padding: 16px; max-width: 480px; width: 100%; max-height: 92vh; overflow: auto; }
.modal-box h3 { margin: 0 0 8px; color: var(--bad); }
.modal-box ul { margin: 8px 0; padding-left: 20px; font-size: 14px; }
.modal-box li { margin-bottom: 4px; }
#relInput { font-size: 24px; text-align: center; border-color: var(--bad); }

/* ── Câu gọi xe khi quẹt hợp lệ: "Mời An điện đỏ vào" — to, tên in đậm nổi bật ── */
.status.call { font-size: 30px; line-height: 1.25; font-weight: 700; padding: 14px 10px; }
.callname { font-size: 40px; font-weight: 900; text-decoration: underline; text-underline-offset: 5px; }
.callnote { font-size: 15px; font-weight: 700; margin-top: 4px; }