:root {
  --vf-accent: #C0392B;
  --vf-accent-soft: #FBEDE9;
  --vf-bg: #FFF8EC;
  --vf-card: #FFFCF7;
  --vf-ink: #2E2119;
  --vf-muted: #7A6558;
  --vf-line: #EADBCC;
}
* { box-sizing: border-box; }
body.vf-admin-body {
  margin: 0; min-height: 100vh; background: var(--vf-bg); color: var(--vf-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Liberation Sans", "DejaVu Sans", sans-serif;
  font-size: 15px; line-height: 1.55; -webkit-font-smoothing: antialiased;
}
.vf-admin { max-width: 1040px; margin: 0 auto; padding: 28px 18px 64px; }
.vf-admin a { color: var(--vf-accent); }
.vf-muted { color: var(--vf-muted); }
.vf-mono, code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 8px; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: .95rem; margin-top: 22px; color: var(--vf-muted); text-transform: uppercase; letter-spacing: .04em; }

/* --- đăng nhập --- */
.vf-login-card {
  max-width: 420px; margin: 9vh auto 0; background: var(--vf-card);
  border: 1px solid var(--vf-line); border-radius: 18px; padding: 28px;
  box-shadow: 0 18px 40px -28px rgba(60, 30, 15, .45);
}
.vf-eyebrow {
  margin: 0 0 6px; font-size: .72rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--vf-accent);
}
.vf-form { display: grid; gap: 10px; margin: 18px 0 6px; }
.vf-form label { font-weight: 600; font-size: .9rem; }
.vf-form input[type=password] {
  width: 100%; padding: 11px 12px; border-radius: 10px; font: inherit;
  border: 1px solid var(--vf-line); background: #fff; color: var(--vf-ink);
}
.vf-form input[type=password]:focus-visible { outline: 2px solid var(--vf-accent); outline-offset: 2px; }
.vf-form button {
  margin-top: 4px; padding: 11px 16px; border: 0; border-radius: 999px; cursor: pointer;
  font: inherit; font-weight: 700; color: #fff; background: var(--vf-accent);
}
.vf-form button:hover { filter: brightness(1.06); }
.vf-error {
  margin: 12px 0 0; padding: 9px 12px; border-radius: 10px; font-size: .9rem;
  background: #FCEBE7; color: #8E1E12; border: 1px solid #F2C9C1;
}
.vf-foot { margin: 18px 0 0; font-size: .88rem; }

/* --- panel thống kê --- */
.vf-shell-head {
  display: flex; flex-wrap: wrap; gap: 12px 16px; align-items: center;
  justify-content: space-between; max-width: 1040px; margin: 0 auto; padding: 18px 18px 0;
}
.vf-shell-brand {
  display: inline-flex; align-items: center; gap: 9px; text-decoration: none;
  color: var(--vf-ink); font-weight: 800; font-size: 1.05rem;
}
.vf-shell-mark { border-radius: 7px; display: block; }
.vf-shell-tools { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.vf-site-nav { display: flex; flex-wrap: wrap; gap: 4px; }
.vf-nav-item {
  padding: 5px 11px; border-radius: 999px; font-size: .8rem; font-weight: 600;
  text-decoration: none; color: var(--vf-muted); border: 1px solid transparent;
}
a.vf-nav-item:hover { color: var(--vf-accent); border-color: var(--vf-line); }
.vf-nav-item.is-current { background: var(--vf-accent-soft); color: var(--vf-accent); }
.vf-shell-out {
  padding: 5px 12px; border-radius: 999px; font-size: .8rem; font-weight: 600;
  text-decoration: none; color: var(--vf-muted); border: 1px solid var(--vf-line);
}
.vf-shell-out:hover { color: var(--vf-accent); border-color: var(--vf-accent); }
.vf-shell-foot {
  max-width: 1040px; margin: 30px auto 0; padding: 0 18px 44px;
  font-size: .8rem; color: var(--vf-muted);
}
.vf-h2 {
  margin: 30px 0 6px; font-size: .95rem; letter-spacing: .05em;
  text-transform: uppercase; color: var(--vf-muted); font-weight: 700;
}
.vf-note {
  margin: 24px 0 0; padding: 10px 12px; border-radius: 10px; font-size: .84rem;
  background: #FFF7E6; border: 1px solid #F0D49A; color: #7A4B00;
}
.vf-tiny {
  padding: 4px 9px; font-size: .78rem; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--vf-line); background: var(--vf-card); color: var(--vf-ink);
}
.vf-tiny-ok { background: #E5F5EC; border-color: #B8E2C8; color: #166534; }
.vf-pill {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: .76rem; background: var(--vf-accent-soft); color: var(--vf-accent); white-space: nowrap;
}
.vf-pill-ok { background: #E5F5EC; color: #166534; }
.vf-pill-new { background: #FFF4D6; color: #7A4B00; }
.vf-msg { max-width: 380px; white-space: normal; line-height: 1.45; overflow-wrap: anywhere; }
.vf-form-inline { display: inline; }
.vf-topbar {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; align-items: center;
  margin: 0 0 18px;
}
.vf-topbar a {
  display: inline-flex; align-items: center; padding: 7px 14px; border-radius: 999px;
  font-size: .85rem; font-weight: 600; text-decoration: none; color: var(--vf-ink);
  background: var(--vf-card); border: 1px solid var(--vf-line);
}
.vf-topbar a:hover { border-color: var(--vf-accent); color: var(--vf-accent); }
.vf-topbar a.vf-topbar-home { background: var(--vf-accent); border-color: var(--vf-accent); color: #fff; }
.vf-topbar a.vf-topbar-home:hover { filter: brightness(1.06); color: #fff; }
.vf-panel { margin: 6px 0 30px; padding-bottom: 8px; border-bottom: 1px solid var(--vf-line); }
.vf-panel-head {
  display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: baseline;
  justify-content: space-between; margin-bottom: 14px;
}
.vf-panel-head p { margin: 0; font-size: .88rem; }
.vf-link { font-size: .88rem; font-weight: 600; }
.vf-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.vf-card {
  background: var(--vf-card); border: 1px solid var(--vf-line); border-radius: 14px;
  padding: 14px 16px; display: grid; gap: 2px;
}
.vf-card-label { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--vf-muted); }
.vf-card-value { font-size: 1.9rem; font-weight: 800; line-height: 1.1; }
.vf-card-sub { font-size: .82rem; color: var(--vf-muted); }
.vf-chart { margin-top: 18px; }
.vf-spark {
  margin: 6px 0 2px; font-size: 1.6rem; letter-spacing: .08em; line-height: 1.1;
  color: var(--vf-accent); overflow-x: auto; white-space: nowrap;
}
.vf-bars {
  margin: 8px 0 4px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1rem; line-height: 1.08; letter-spacing: .06em; color: var(--vf-accent);
  white-space: pre; overflow-x: auto;
}
.vf-axis { display: flex; justify-content: space-between; font-size: .75rem; color: var(--vf-muted); }
.vf-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.vf-grid-3 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.vf-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.vf-table th, .vf-table td { padding: 7px 8px; border-bottom: 1px solid var(--vf-line); text-align: left; }
.vf-table thead th { font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; color: var(--vf-muted); }
.vf-table th[scope=row] { font-weight: 500; max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* Trung hoà style bảng của trang chủ nhúng (nền, chữ hoa, giãn chữ). */
.vf-panel .vf-table th,
.vf-panel .vf-table td {
  background: transparent; text-transform: none; letter-spacing: 0; color: var(--vf-ink);
  font-size: .9rem; white-space: normal; vertical-align: middle;
}
.vf-panel .vf-table thead th {
  text-transform: uppercase; letter-spacing: .05em; color: var(--vf-muted); font-size: .76rem;
}
.vf-panel .vf-table th[scope=row] { white-space: nowrap; }
.vf-panel .vf-table td.vf-bar { color: var(--vf-accent); font-size: .78rem; letter-spacing: 0; }
/* Trang nhúng có thể tô nền cho cả <table>; bỏ để panel giữ nền kem. */
.vf-panel .vf-table,
.vf-panel .vf-table thead,
.vf-panel .vf-table tbody,
.vf-panel .vf-table tr { background: transparent; border: 0; }
.vf-panel .vf-table { border-radius: 0; }
.vf-compact th, .vf-compact td { padding: 5px 6px; }
.vf-bar { color: var(--vf-accent); letter-spacing: 0; white-space: nowrap; font-size: .8rem; overflow: hidden; }
.vf-rank { table-layout: fixed; }
.vf-rank th[scope=row] { width: 42%; }
.vf-rank td.vf-bar { width: 48%; }
.vf-rank td.vf-num { width: 10%; }
.vf-num { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.vf-scroll { overflow-x: auto; }
.vf-mini h3 { margin-top: 18px; }
@media (max-width: 560px) {
  .vf-card-value { font-size: 1.5rem; }
  .vf-spark { font-size: 1.15rem; letter-spacing: .04em; }
}