:root {
  --ink: #1f2430;
  --muted: #5b6472;
  --line: #e3e7ee;
  --bg: #fbfbfd;
  --card: #ffffff;
  --accent: #2f6fed;
  --accent-soft: #eaf1ff;
  --good: #1a8754;
  --good-bg: #e9f7ef;
  --warn: #b8860b;
  --warn-bg: #fdf6e3;
  --bad: #c0392b;
  --bad-bg: #fdecea;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 20px 80px; }

header.top {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 28px; border-radius: 14px; margin-bottom: 20px;
  background: linear-gradient(135deg, #1d2f6f 0%, #2f6fed 60%, #4f8cff 100%);
  color: #fff;
}
header.top h1 { margin: 0; font-size: 1.3rem; }
header.top .meta { font-size: 0.82rem; color: #e4ecff; }
header.top button {
  background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.4);
  border-radius: 8px; padding: 6px 14px; cursor: pointer; font-size: 0.85rem;
}
header.top button:hover { background: rgba(255,255,255,0.28); }

.toolbar {
  display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; margin-bottom: 16px;
}
.toolbar select, .toolbar input[type="search"] {
  padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 0.9rem;
}

.tier-group { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.tier-btn {
  padding: 8px 14px; border: none; background: #fff; font-size: 0.86rem; cursor: pointer;
  border-right: 1px solid var(--line); color: var(--muted);
}
.tier-btn:last-child { border-right: none; }
.tier-btn:hover { background: var(--accent-soft); }
.tier-btn.active { background: var(--accent); color: #fff; font-weight: 600; }

.tier-tag { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 0.76rem; font-weight: 700; }
.tier-tag-5 { background: #fdecea; color: #c0392b; }
.tier-tag-10 { background: #e9f7ef; color: #1a8754; }
.tier-tag-15 { background: #eaf1ff; color: #2f6fed; }
.tier-tag-20 { background: #f3f4f8; color: #5b6472; }
.tier-tag-quiet { background: #f3e8d8; color: #8a5a00; }
.tier-tag-active { background: var(--good-bg); color: var(--good); }

.quiet-toggle {
  display: flex; align-items: center; gap: 6px; font-size: 0.84rem; color: var(--muted);
  cursor: pointer; white-space: nowrap;
}
.quiet-toggle input { accent-color: var(--accent); }
tbody tr.regime-quiet { background: #fdf9f2; }

.dropdown { position: relative; }
.dropdown-btn {
  padding: 8px 14px; border: 1px solid var(--line); border-radius: 8px; background: #fff;
  font-size: 0.9rem; cursor: pointer; min-width: 160px; text-align: left;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.dropdown-btn:hover { border-color: var(--accent); }
.dropdown-btn .chevron { color: var(--muted); font-size: 0.75rem; }
.dropdown-panel {
  position: absolute; top: calc(100% + 6px); left: 0; z-index: 20;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 8px 24px rgba(20,30,60,0.12); padding: 8px; min-width: 260px;
  max-height: 320px; overflow-y: auto;
}
.dropdown-panel label {
  display: flex; align-items: center; gap: 8px; padding: 7px 8px; border-radius: 6px;
  font-size: 0.88rem; cursor: pointer;
}
.dropdown-panel label:hover { background: var(--accent-soft); }
.dropdown-panel input[type="checkbox"] { accent-color: var(--accent); }
.toolbar input[type="search"] { flex: 1; min-width: 180px; }
.toolbar .spacer { flex: 1; }
.btn {
  padding: 8px 16px; border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: #fff; font-size: 0.88rem; cursor: pointer; text-decoration: none;
}
.btn:hover { opacity: 0.9; }
.btn[disabled], .btn.disabled {
  background: var(--line); border-color: var(--line); color: var(--muted); cursor: not-allowed; pointer-events: none;
}

.table-scroll { overflow-x: auto; border-radius: 12px; }
table {
  width: 100%; min-width: 1100px; table-layout: fixed; border-collapse: collapse;
  background: var(--card); border-radius: 12px; overflow: hidden;
}
thead th {
  position: relative; text-align: left; font-size: 0.76rem; text-transform: uppercase;
  letter-spacing: 0.03em; color: var(--muted); padding: 10px 14px;
  border-bottom: 1px solid var(--line); cursor: pointer; white-space: normal;
  overflow-wrap: break-word; line-height: 1.3;
}
thead th:hover { color: var(--accent); }
thead th.num-col { text-align: center; }
tbody td {
  padding: 11px 14px; border-bottom: 1px solid var(--line); font-size: 0.9rem;
  overflow-wrap: anywhere; word-break: break-word;
}
tbody td.num-col { text-align: center; }
tbody tr:hover { background: var(--accent-soft); cursor: pointer; }
tbody tr:last-child td { border-bottom: none; }

.col-resizer {
  position: absolute; top: 0; right: 0; width: 6px; height: 100%; cursor: col-resize;
  user-select: none; touch-action: none;
}
.col-resizer:hover, .col-resizer.resizing { background: var(--accent-soft); }

.score { font-weight: 600; color: var(--accent); white-space: nowrap; }

.id-cell { position: relative; }
.corner-tag {
  position: absolute; top: 2px; right: 2px; padding: 1px 6px; border-radius: 4px;
  font-size: 0.66rem; font-weight: 700; line-height: 1.4; white-space: nowrap; pointer-events: none;
}
.level { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }
.level-cao { background: var(--good-bg); color: var(--good); }
.level-trung { background: var(--warn-bg); color: var(--warn); }
.level-thap { background: var(--bad-bg); color: var(--bad); }

.empty, .loading { text-align: center; padding: 40px; color: var(--muted); }

/* Login */
.login-box {
  max-width: 360px; margin: 90px auto; background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 32px;
}
.login-box h1 { font-size: 1.2rem; margin: 0 0 4px; }
.login-box p.sub { color: var(--muted); font-size: 0.85rem; margin: 0 0 20px; }
.login-box label { display: block; font-size: 0.82rem; color: var(--muted); margin: 12px 0 4px; }
.login-box input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 0.95rem;
}
.login-box button {
  width: 100%; margin-top: 20px; padding: 11px; border: none; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 0.95rem; cursor: pointer;
}
.login-box .error { color: var(--bad); font-size: 0.85rem; margin-top: 12px; min-height: 1em; }

/* Product detail */
.back-link { display: inline-block; margin-bottom: 14px; color: var(--accent); text-decoration: none; font-size: 0.9rem; }
.product-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.product-card h2 { margin: 0 0 4px; }
.product-card .sub { color: var(--muted); font-size: 0.88rem; margin-bottom: 20px; }
.chart-wrap { margin-top: 8px; }
.chart-legend { display: flex; gap: 16px; font-size: 0.82rem; color: var(--muted); margin-top: 8px; }
.chart-legend span.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 5px; }

.cumulative-note {
  margin-top: 10px; padding: 12px 14px; border-radius: 8px; background: var(--bg);
  border: 1px solid var(--line); font-size: 0.85rem; color: var(--ink); display: grid; gap: 4px;
}

.product-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.product-head h2 { margin: 0 0 4px; }

.case-toggle-label { margin-top: 22px; font-size: 0.85rem; color: var(--muted); }
.case-toggle { display: flex; gap: 10px; margin-top: 8px; }
.case-btn {
  flex: 1; padding: 10px 14px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; font-size: 0.88rem; cursor: pointer; color: var(--ink);
}
.case-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

.gmv-section-label { margin-top: 22px; font-size: 0.88rem; color: var(--muted); }
.gmv-boxes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 10px; }
.gmv-box { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 14px; text-align: center; }
.gmv-box-label { font-size: 0.78rem; color: var(--muted); margin-bottom: 6px; }
.gmv-box-value { font-size: 1.05rem; font-weight: 700; color: var(--ink); }

.warning-box {
  margin-top: 14px; padding: 12px 14px; border-radius: 8px; background: var(--warn-bg);
  color: #8a6500; font-size: 0.85rem; border: 1px solid #f0dca0;
}

.why-box { margin-top: 24px; border-top: 1px solid var(--line); padding-top: 14px; }
.why-box summary { cursor: pointer; font-weight: 600; font-size: 0.92rem; margin-bottom: 10px; }

.perf-row { margin: 14px 0; }
.perf-row-top { display: flex; justify-content: space-between; font-size: 0.86rem; margin-bottom: 6px; }
.perf-track { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.perf-fill { height: 100%; border-radius: 999px; }
.perf-tag { font-size: 0.76rem; font-weight: 700; padding: 1px 9px; border-radius: 999px; }
.perf-1 { background: var(--bad-bg); color: var(--bad); }
.perf-2 { background: var(--warn-bg); color: var(--warn); }
.perf-3 { background: var(--accent-soft); color: var(--accent); }
.perf-4 { background: var(--good-bg); color: var(--good); }
.perf-5 { background: #e6f4ff; color: #0b5fa8; }
.perf-fill.perf-1 { background: var(--bad); }
.perf-fill.perf-2 { background: var(--warn); }
.perf-fill.perf-3 { background: var(--accent); }
.perf-fill.perf-4 { background: var(--good); }
.perf-fill.perf-5 { background: #0b5fa8; }