:root {
  --bg: #f6f7f9; --panel: #fff; --line: #e3e6ea; --text: #1d2330; --muted: #6b7280;
  --accent: #2563eb; --good: #15803d; --bad: #c2410c; --warn: #b45309; --danger: #b91c1c;
  --soft-good: #e8f5ec; --soft-bad: #fdeee6; --soft-warn: #fff6e0; --soft-accent: #eaf1ff;
}
* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--text); background: var(--bg); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 12px; }

.topbar { display: flex; align-items: center; gap: 18px; padding: 10px 20px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 700; font-size: 16px; color: var(--text); }
.topbar nav { display: flex; gap: 14px; }
.topbar nav a { color: var(--muted); }
.chips { display: flex; gap: 8px; margin-left: auto; flex-wrap: wrap; }
.chip { padding: 3px 9px; border-radius: 999px; font-size: 12px; background: #eef0f3; color: var(--muted); white-space: nowrap; }
.chip.ok { background: var(--soft-good); color: var(--good); }
.chip.warn { background: var(--soft-warn); color: var(--warn); }
.chip.bad { background: var(--soft-bad); color: var(--bad); }

#banner .notice { margin: 12px 20px 0; padding: 10px 14px; border-radius: 8px; background: var(--soft-warn); color: var(--warn); }
#banner .notice.bad { background: var(--soft-bad); color: var(--bad); }
main { padding: 18px 20px 60px; max-width: 1400px; margin: 0 auto; }

.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.toolbar h1 { font-size: 20px; margin: 0 auto 0 0; }
.toolbar h1 small { font-weight: 400; color: var(--muted); font-size: 14px; margin-left: 6px; }
.btn { border: 1px solid var(--accent); background: var(--accent); color: #fff; padding: 6px 12px; border-radius: 6px; cursor: pointer; font: inherit; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.danger { border-color: var(--danger); background: transparent; color: var(--danger); }
.btn.sm { padding: 2px 8px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: default; }
input, select, textarea { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
textarea { width: 100%; min-height: 160px; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.panel + .panel { margin-top: 16px; }
.panel h2 { font-size: 15px; margin: 0; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.panel .body { padding: 14px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 600; background: #fafbfc; cursor: default; white-space: nowrap; }
th[data-sort] { cursor: pointer; }
th[data-sort]:hover { color: var(--text); }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #fafcff; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.url { max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.pos { font-weight: 700; font-variant-numeric: tabular-nums; }
.pos.top3 { color: var(--good); }
.pos.out { color: var(--muted); font-weight: 400; }
.delta { font-size: 12px; font-variant-numeric: tabular-nums; }
.delta.up { color: var(--good); }
.delta.down { color: var(--bad); }
.badge { display: inline-block; padding: 1px 6px; border-radius: 4px; font-size: 11px; background: #eef0f3; color: var(--muted); margin-right: 4px; }
.badge.warn { background: var(--soft-warn); color: var(--warn); }
.badge.accent { background: var(--soft-accent); color: var(--accent); }
.counts b { font-weight: 700; }
.counts .t3 { color: var(--good); }
.counts .t10 { color: var(--accent); }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.stat .label { font-size: 12px; color: var(--muted); }
.stat .value { font-size: 22px; font-weight: 700; margin-top: 2px; font-variant-numeric: tabular-nums; }
.stat .sub { font-size: 12px; color: var(--muted); }

dialog { border: 0; border-radius: 12px; padding: 0; width: min(640px, 94vw); box-shadow: 0 20px 60px rgba(0,0,0,.2); }
dialog::backdrop { background: rgba(15,23,42,.35); }
.form { padding: 18px 20px; }
.form h3 { margin: 0 0 14px; }
.form .row { display: grid; grid-template-columns: 160px 1fr; gap: 10px; align-items: center; margin-bottom: 10px; }
.form .row .hint { grid-column: 2; font-size: 12px; color: var(--muted); margin-top: -6px; }
.form .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.form .error { color: var(--danger); margin-top: 8px; white-space: pre-wrap; }
.report { background: #fafbfc; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; margin-top: 10px; white-space: pre-wrap; font-size: 13px; max-height: 260px; overflow: auto; }

#toast { position: fixed; bottom: 20px; right: 20px; background: #111827; color: #fff; padding: 10px 14px; border-radius: 8px; max-width: 420px; white-space: pre-wrap; z-index: 20; }
.login { max-width: 360px; margin: 80px auto; }
.chart { width: 100%; height: 220px; display: block; }
.empty { padding: 30px; text-align: center; color: var(--muted); }

/* Thuộc tính hidden luôn thắng: .toolbar { display:flex } từng làm thanh "Đã chọn 0 từ khoá" hiện ra */
[hidden] { display: none !important; }

.legal-links { text-align: center; font-size: 12px; color: var(--muted); padding: 0 20px 24px; }
.legal-links a { color: var(--muted); }