:root {
  --bg: #f4f6f2;
  --card: #ffffff;
  --ink: #173124;
  --muted: #6d7c73;
  --line: #dfe6e0;
  --green: #1f5a3b;
  --green-2: #4f8a63;
  --green-soft: #e8f0ea;
  --sand: #efe4cf;
  --danger: #b44343;
  --shadow: 0 12px 34px rgba(24, 55, 37, .08);
  --radius: 18px;
}
* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; color: var(--ink); background: var(--bg); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
.topbar { min-height: 74px; padding: 12px clamp(18px, 4vw, 54px); display: flex; align-items: center; justify-content: space-between; background: #153925; color: #fff; position: sticky; top: 0; z-index: 20; }
.brand { display: flex; gap: 12px; align-items: center; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; font-weight: 800; letter-spacing: .05em; }
.brand-title { font-weight: 800; letter-spacing: .02em; }
.brand-subtitle { font-size: 12px; opacity: .72; }
.user-menu { display: flex; align-items: center; gap: 16px; }
.user-meta { text-align: right; display: grid; }
.user-meta span { font-size: 12px; opacity: .72; }
.nav-tabs { padding: 0 clamp(18px, 4vw, 54px); background: #fff; border-bottom: 1px solid var(--line); display: flex; gap: 6px; position: sticky; top: 74px; z-index: 19; }
.nav-tabs a { padding: 14px 16px; font-size: 14px; font-weight: 700; color: #516158; }
.nav-tabs a:hover { color: var(--green); background: var(--green-soft); }
.container { width: min(1440px, calc(100% - 36px)); margin: 0 auto; padding: 34px 0 60px; }
.page-heading { display: flex; justify-content: space-between; align-items: end; gap: 22px; margin-bottom: 24px; }
.page-heading h1, .auth-card h1 { margin: 4px 0 8px; font-size: clamp(28px, 4vw, 42px); line-height: 1.08; letter-spacing: -.035em; }
.eyebrow { text-transform: uppercase; font-size: 12px; letter-spacing: .14em; color: var(--green-2); font-weight: 800; }
.muted { color: var(--muted); margin: 0; }
.heading-actions { display: flex; align-items: end; gap: 12px; }
.month-filter { display: grid; gap: 6px; }
.month-filter label { font-size: 12px; color: var(--muted); font-weight: 700; }
.card { background: var(--card); border: 1px solid rgba(31,90,59,.08); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.card h2 { margin: 0; font-size: 20px; letter-spacing: -.015em; }
.card-title-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.btn { border: 0; border-radius: 11px; padding: 10px 15px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; font-weight: 800; transition: .18s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 8px 18px rgba(31,90,59,.16); }
.btn-ghost { background: transparent; border: 1px solid currentColor; color: inherit; }
.topbar .btn-ghost { color: #fff; border-color: rgba(255,255,255,.34); }
.btn-sm { padding: 7px 10px; font-size: 12px; }
.btn-lg { padding: 13px 18px; }
.btn-block { width: 100%; }
.form-stack { display: grid; gap: 16px; }
.form-grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { font-size: 13px; font-weight: 750; display: grid; gap: 7px; }
input, select { width: 100%; border: 1px solid #cfd9d1; background: #fff; color: var(--ink); border-radius: 11px; padding: 11px 12px; outline: none; transition: .18s ease; }
input:focus, select:focus { border-color: var(--green-2); box-shadow: 0 0 0 4px rgba(79,138,99,.12); }
fieldset { border: 0; padding: 0; margin: 0; }
legend { font-size: 13px; font-weight: 800; margin-bottom: 8px; }
.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.choice-card { position: relative; cursor: pointer; }
.choice-card input { position: absolute; opacity: 0; pointer-events: none; }
.choice-card span { min-height: 58px; display: flex; align-items: center; border: 1px solid #d5ddd7; border-radius: 12px; padding: 10px 12px; background: #fbfcfb; transition: .18s ease; }
.choice-card input:checked + span { border-color: var(--green); background: var(--green-soft); color: var(--green); box-shadow: inset 0 0 0 1px var(--green); }
.hidden { display: none !important; }
.alert { padding: 12px 14px; border-radius: 12px; margin-bottom: 18px; font-weight: 650; font-size: 14px; }
.alert-error { background: #fdecec; color: #8c3333; border: 1px solid #f2c7c7; }
.alert-success { background: #eaf5ed; color: #245b38; border: 1px solid #cae3d1; }
.auth-shell { min-height: calc(100vh - 140px); display: grid; place-items: center; padding: 34px 0; }
.auth-card { width: min(460px, 100%); background: #fff; border-radius: 22px; box-shadow: var(--shadow); border: 1px solid rgba(31,90,59,.08); padding: clamp(24px, 5vw, 42px); }
.auth-card.wide { width: min(720px, 100%); }
.install-note { font-size: 13px; color: var(--muted); margin-top: 18px; }
.install-note code { color: var(--ink); background: var(--green-soft); padding: 2px 6px; border-radius: 5px; }
.staff-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .75fr); gap: 20px; align-items: start; }
.form-card { padding: clamp(20px, 4vw, 32px); }
.live-time { background: var(--green-soft); color: var(--green); font-size: 12px; font-weight: 800; padding: 7px 10px; border-radius: 999px; white-space: nowrap; }
.recent-list { display: grid; gap: 2px; }
.recent-item { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid #edf1ee; }
.recent-item:last-child { border-bottom: 0; }
.recent-item > div:first-child { display: grid; gap: 4px; }
.recent-item span, .recent-item small { font-size: 12px; color: var(--muted); }
.recent-right { display: grid; justify-items: end; gap: 5px; }
.pill { display: inline-flex; padding: 4px 8px; border-radius: 999px; background: var(--green-soft); color: var(--green) !important; font-size: 11px !important; font-weight: 800; white-space: nowrap; }
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.kpi-card { background: #fff; border: 1px solid rgba(31,90,59,.08); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); min-height: 148px; display: flex; flex-direction: column; justify-content: center; }
.kpi-card.accent { background: #173d2a; color: #fff; }
.kpi-label { color: var(--muted); font-weight: 750; font-size: 13px; }
.kpi-card.accent .kpi-label, .kpi-card.accent .kpi-note { color: rgba(255,255,255,.68); }
.kpi-value { font-size: clamp(30px, 4vw, 44px); font-weight: 850; letter-spacing: -.04em; margin: 5px 0; }
.kpi-text { font-size: clamp(22px, 3vw, 31px); }
.kpi-note { color: var(--muted); font-size: 12px; }
.positive { color: #2e7d4d; }
.negative { color: var(--danger); }
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.wide-chart { grid-column: 1 / -1; }
.chart-box { position: relative; height: 310px; }
.chart-box.tall { height: 340px; }
.report-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; margin-bottom: 20px; }
.table-card { overflow: hidden; }
.table-wrap { width: 100%; overflow: auto; }
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: #718078; background: #f7f9f7; }
th, td { padding: 12px 13px; border-bottom: 1px solid #edf1ee; vertical-align: middle; }
td { font-size: 13px; }
td small { color: var(--muted); }
.progress { width: 120px; height: 7px; border-radius: 999px; background: #edf2ee; display: inline-block; margin-right: 8px; overflow: hidden; vertical-align: middle; }
.progress span { display: block; height: 100%; background: var(--green-2); border-radius: inherit; }
.empty-state { text-align: center; color: var(--muted); padding: 28px !important; }
.users-layout { display: grid; grid-template-columns: minmax(280px,.38fr) minmax(0,1fr); gap: 20px; align-items: start; }
.status { display: inline-flex; padding: 4px 8px; border-radius: 999px; font-size: 11px; font-weight: 800; }
.status.on { color: #28653e; background: #e8f4ec; }
.status.off { color: #8a4040; background: #f9eaea; }
.action-stack { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; }
details summary { font-size: 12px; cursor: pointer; color: var(--green); font-weight: 750; }
.inline-reset { display: flex; gap: 6px; margin-top: 8px; min-width: 250px; }
.inline-reset input { padding: 7px 9px; }
.records-card { margin-bottom: 24px; }
@media (max-width: 1020px) {
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .staff-grid, .users-layout, .report-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .container { width: min(100% - 24px, 1440px); padding-top: 22px; }
  .topbar { padding-inline: 14px; }
  .brand-subtitle, .user-meta { display: none; }
  .nav-tabs { padding-inline: 8px; top: 66px; }
  .page-heading, .admin-heading { align-items: stretch; flex-direction: column; }
  .heading-actions { align-items: stretch; flex-direction: column; }
  .kpi-grid, .chart-grid { grid-template-columns: 1fr; }
  .wide-chart { grid-column: auto; }
  .choice-grid, .form-grid.two { grid-template-columns: 1fr; }
  .card { padding: 18px; border-radius: 15px; }
  .recent-item { align-items: flex-start; }
  .recent-right { min-width: 100px; }
  .chart-box, .chart-box.tall { height: 280px; }
}

/* ===== V2: giá trị bill + thao tác quản trị ===== */
.money-input-wrap { position: relative; }
.money-input-wrap input { padding-right: 58px; }
.money-input-wrap > span { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); font-size: 12px; font-weight: 800; color: var(--muted); pointer-events: none; }
.field-hint { color: var(--muted); font-weight: 500; font-size: 11px; line-height: 1.45; }
.recent-item-editable { align-items: flex-start; }
.recent-main { min-width: 0; flex: 1; }
.bill-status { width: fit-content; padding: 3px 7px; border-radius: 7px; font-weight: 750; }
.bill-status.pending { background: #fff4df; color: #8b611e !important; }
.bill-status.done { background: #e8f4ec; color: #28653e !important; }
.bill-update-form { margin-top: 7px; }
.bill-update-row { display: grid; grid-template-columns: minmax(120px, 1fr) auto; gap: 7px; align-items: center; }
.bill-update-row input { padding: 7px 9px; font-size: 12px; }
.btn-danger { background: var(--danger); color: #fff; box-shadow: 0 7px 16px rgba(180,67,67,.14); }
.btn-danger:hover { background: #963737; }
.kpi-grid-five { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.kpi-money { font-size: clamp(20px, 2.2vw, 31px); letter-spacing: -.025em; }
.danger-zone { border-color: #edcaca; background: #fffafa; display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 24px; }
.danger-zone h2 { margin: 4px 0 8px; }
.danger-zone-copy { max-width: 760px; }
.danger-text { color: var(--danger); }
.danger-form { width: min(360px, 100%); display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: end; }
.danger-form label { min-width: 150px; }

@media (max-width: 1180px) {
  .kpi-grid-five { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 820px) {
  .danger-zone { flex-direction: column; align-items: stretch; }
  .danger-form { width: 100%; }
}
@media (max-width: 720px) {
  .kpi-grid-five { grid-template-columns: 1fr; }
  .recent-item-editable { flex-direction: column; }
  .recent-item-editable .recent-right { justify-items: start; min-width: 0; }
  .danger-form { grid-template-columns: 1fr; }
}