:root {
  --primary: #0B7285;
  --primary-light: #4CC9F0;
  --secondary: #F9C74F;
  --surface: #F8FAFC;
  --card: #FFFFFF;
  --line: #E2E8F0;
  --title: #1E293B;
  --body: #334155;
  --muted: #64748B;
  --ok: #43AA8B;
  --bad: #F94144;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--surface);
  color: var(--body);
  line-height: 1.5;
}

.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }

.top {
  background: linear-gradient(135deg, var(--primary), #0a5e6d);
  color: #fff;
  padding: 22px 0 26px;
  margin-bottom: 20px;
}
.top h1 { margin: 0 0 4px; font-size: 1.35rem; }
.top .sub { margin: 0; opacity: .92; font-size: .9rem; }
.top b { color: var(--secondary); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 14px;
}

.search .grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 96px 96px 120px minmax(180px, 1fr) auto;
  align-items: end;
}
@media (max-width: 860px) {
  .search .grid { grid-template-columns: 1fr 1fr; }
  .search .grid .w-ten { grid-column: 1 / -1; }
  .search .grid button { grid-column: 1 / -1; }
}

select {
  width: 100%;
  padding: 11px 12px;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--title);
}
select:focus { outline: 2px solid var(--primary-light); border-color: var(--primary); }

button.link {
  background: none;
  border: 0;
  padding: 0;
  color: var(--primary);
  font-size: .82rem;
  font-weight: 500;
  text-decoration: underline;
  cursor: pointer;
}

#manual-wrap { margin-top: 10px; max-width: 260px; }

label { display: block; }
label > span { display: block; font-size: .78rem; color: var(--muted); margin-bottom: 4px; }

input {
  width: 100%;
  padding: 11px 12px;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--title);
}
input:focus { outline: 2px solid var(--primary-light); border-color: var(--primary); }

button {
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  border: 0;
  border-radius: 9px;
  cursor: pointer;
}
button:hover { opacity: .92; }
button:disabled { opacity: .55; cursor: default; }

.hint { color: var(--muted); font-size: .8rem; margin: 10px 0 0; }

.msg {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: .92rem;
  border: 1px solid var(--line);
  background: #fff;
}
.msg.err { border-color: #f3b0b0; background: #fef2f2; color: #9b1c1c; }

.head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.head h2 { margin: 0 0 4px; font-size: 1.15rem; color: var(--title); }
.muted { color: var(--muted); }
.small { font-size: .8rem; }
.head .muted { margin: 0; }

.badge {
  white-space: nowrap;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: .78rem;
  background: #e6f7f0;
  color: #14624b;
  border: 1px solid #b7e4d3;
}
.badge.off { background: #fee2e2; color: #991b1b; border-color: #fecaca; }

.cards { display: grid; gap: 12px; grid-template-columns: repeat(4, 1fr); margin-bottom: 14px; }
@media (max-width: 860px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 420px) { .cards { grid-template-columns: 1fr; } }

.stat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}
.stat .k { font-size: .78rem; color: var(--muted); }
.stat .v { font-size: 1.5rem; font-weight: 700; color: var(--title); margin-top: 2px; }
.stat .v span { font-size: .85rem; font-weight: 500; color: var(--muted); }

h3 { margin: 0 0 12px; font-size: 1rem; color: var(--title); }

.chart-box { position: relative; height: 300px; }

.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .02em; }
tbody tr:hover { background: #f1f7f9; }
td.num { font-variant-numeric: tabular-nums; }

.foot { padding: 10px 16px 30px; text-align: center; }

/* ── Đầu báo cháy ── */
.fire-grid { display: grid; gap: 10px; grid-template-columns: 1fr 1fr; }
@media (max-width: 620px) { .fire-grid { grid-template-columns: 1fr; } }

.fire-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  background: #fff;
}
.fire-item.ok { border-left: 4px solid var(--ok); }
.fire-item.no { border-left: 4px solid #cbd5e1; }

.fire-item .fi-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.fire-item .fi-name { font-weight: 600; color: var(--title); font-size: .95rem; }
.fire-item .fi-code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .75rem; color: var(--muted); margin-top: 2px; }
.fire-item .fi-meta { font-size: .82rem; color: var(--body); margin-top: 8px; }
.fire-item .fi-meta b { color: var(--title); font-weight: 600; }

.tag { white-space: nowrap; padding: 3px 9px; border-radius: 999px; font-size: .72rem; font-weight: 600; }
.tag.ok { background: #e6f7f0; color: #14624b; border: 1px solid #b7e4d3; }
.tag.no { background: #f1f5f9; color: #64748b; border: 1px solid #e2e8f0; }
.tag.warn { background: #fff7e6; color: #92610a; border: 1px solid #f6dfae; }

/* ── Logo chung cư ── */
.top .brand { display: flex; align-items: center; gap: 14px; }
.top .brand-text { min-width: 0; }
.logo {
  flex: 0 0 auto;
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: #fff;
  padding: 3px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .18);
  object-fit: contain;
}
@media (max-width: 540px) {
  .top .brand { gap: 11px; }
  .logo { width: 52px; height: 52px; border-radius: 12px; }
  .top h1 { font-size: 1.1rem; }
  .top .sub { font-size: .84rem; }
}