:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2a3441;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #4f8cff;
  --os: #7c5cff;
  --ep: #21c7a8;
  --danger: #ff5d6c;
  --warn: #ffb454;
  --ok: #2ecc71;
  --radius: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

.topbar {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #131820, #0e1116);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.brand h1 { font-size: 16px; margin: 0; font-weight: 600; letter-spacing: .2px; }
.brand .sub { color: var(--muted); font-size: 13px; }
.brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: linear-gradient(135deg, var(--os), var(--ep));
  box-shadow: 0 0 12px rgba(124, 92, 255, .6);
}

main { max-width: 1200px; margin: 0 auto; padding: 24px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.card-head { margin-bottom: 14px; }
.card-head h2 { margin: 0 0 2px; font-size: 15px; }
.muted { color: var(--muted); margin: 0; font-size: 13px; }

.explainer { margin-top: 10px; }
.explainer summary {
  cursor: pointer; color: var(--accent); font-size: 13px; font-weight: 600;
  width: fit-content; user-select: none;
}
.explainer summary:hover { text-decoration: underline; }
.explainer ul { margin: 10px 0 2px; padding-left: 18px; color: var(--muted); font-size: 13px; }
.explainer li { margin-bottom: 5px; }
.explainer strong { color: var(--text); }

/* Uploader */
.drops { display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch; gap: 14px; }
.vs { display: flex; align-items: center; color: var(--muted); font-size: 22px; }
.drop {
  display: block;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .05s;
  background: var(--panel-2);
}
.drop:hover { border-color: var(--accent); }
.drop.dragover { border-color: var(--accent); background: #1a2333; }
.drop.loaded { border-style: solid; border-color: #34506e; }
.drop-tag {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .5px;
  padding: 3px 8px; border-radius: 999px; text-transform: uppercase; margin-bottom: 8px;
}
.drop-tag.os { background: rgba(124, 92, 255, .16); color: #b6a4ff; }
.drop-tag.ep { background: rgba(33, 199, 168, .16); color: #6ee7cf; }
.drop-title { font-weight: 600; margin-bottom: 4px; }
.drop-hint { color: var(--muted); font-size: 13px; }
.drop-hint code { background: #0d1117; padding: 1px 6px; border-radius: 5px; color: #c9d3df; }
.drop.loaded .drop-hint { color: var(--muted); }
.filelist { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.filelist li { font-size: 12.5px; color: var(--ok); display: flex; align-items: center; gap: 6px; }
.filelist li::before { content: "✓"; color: var(--ok); }
.clear-files {
  margin-top: 10px; background: transparent; border: none; color: var(--muted);
  font-size: 12px; cursor: pointer; text-decoration: underline; padding: 0;
}
.clear-files:hover { color: var(--danger); }

.controls {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-top: 18px; flex-wrap: wrap;
}
.keyopts { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.keyopts-label { color: var(--muted); font-size: 13px; }
.keyopts label { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; user-select: none; }
.keyopts input { accent-color: var(--accent); }
.keyopts .tol { gap: 7px; color: var(--muted); }
.keyopts .tol select {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 5px 8px; font-size: 13px; cursor: pointer;
}

.btn {
  background: var(--accent); color: #fff; border: none; border-radius: 9px;
  padding: 10px 20px; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: opacity .15s, transform .05s;
}
.btn:hover:not(:disabled) { opacity: .9; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn.ghost:hover { border-color: var(--accent); }

.err { color: var(--danger); margin: 14px 0 0; font-size: 13px; }

/* Summary cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 20px; }
.metric {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px;
}
.metric .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
.metric .value { font-size: 26px; font-weight: 700; margin-top: 6px; }
.metric .value.small { font-size: 20px; }
.metric.good .value { color: var(--ok); }
.metric.bad .value { color: var(--danger); }
.metric.warn .value { color: var(--warn); }
.metric .foot { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* Tables */
.table-wrap { overflow-x: auto; border-radius: 8px; border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: var(--panel-2); color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .3px; position: sticky; top: 0; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #1a212c; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.pill { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.pill.ok { background: rgba(46, 204, 113, .15); color: var(--ok); }
.pill.bad { background: rgba(255, 93, 108, .15); color: var(--danger); }
.pill.warn { background: rgba(255, 180, 84, .15); color: var(--warn); }
.pill.info { background: rgba(79, 140, 255, .16); color: var(--accent); }
tr.row-bad td { background: rgba(255, 93, 108, .05); }
.diff-pos { color: var(--os); font-weight: 600; }
.diff-neg { color: var(--ep); font-weight: 600; }
.diff-zero { color: var(--muted); }
code.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; color: #c9d3df; }

/* Tabs */
.tabs { display: flex; align-items: center; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tab {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  padding: 8px 14px; border-radius: 9px; cursor: pointer; font-size: 13px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 8px;
}
.tab.active { color: var(--text); border-color: var(--accent); background: rgba(79, 140, 255, .08); }
.tab-spacer { flex: 1; }
.badge { background: var(--panel-2); border-radius: 999px; padding: 1px 8px; font-size: 11px; color: var(--text); }
.tab.active .badge { background: var(--accent); }
.panel-note { margin-bottom: 12px; }

.empty { padding: 28px; text-align: center; color: var(--muted); }

/* Tool controls (breakdown / trend) */
.tool-controls { display: flex; align-items: center; gap: 18px; margin-bottom: 14px; flex-wrap: wrap; }
.tool-controls label { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.tool-controls select {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px; font-size: 13px; cursor: pointer;
}
.legend { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12.5px; }
.legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.legend i.sw-matched { background: var(--ok); }
.legend i.sw-unmatched { background: var(--danger); }

/* Match-rate bar in breakdown */
.ratebar { width: 120px; height: 8px; background: var(--panel-2); border-radius: 999px; overflow: hidden; }
.ratebar-fill { height: 100%; border-radius: 999px; }
.ratebar-ok { background: var(--ok); }
.ratebar-warn { background: var(--warn); }
.ratebar-bad { background: var(--danger); }

/* Daily trend chart */
.trend-chart { display: flex; flex-direction: column; gap: 5px; }
.trend-row { display: grid; grid-template-columns: 92px 1fr 120px; align-items: center; gap: 10px; }
.trend-label { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.trend-track { background: transparent; height: 16px; }
.trend-bar { display: flex; height: 16px; border-radius: 4px; overflow: hidden; min-width: 2px; }
.trend-matched { background: var(--ok); height: 100%; }
.trend-unmatched { background: var(--danger); height: 100%; }
.trend-counts { font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }
.ok-text { color: var(--ok); }
.bad-text { color: var(--danger); }

/* Lookup */
.lookup-input {
  width: 100%; background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 9px; padding: 11px 14px; font-size: 14px; margin-bottom: 8px;
}
.lookup-input:focus { outline: none; border-color: var(--accent); }
.lookup-meta { margin-bottom: 12px; font-size: 12.5px; }
#table-lookup .drop-tag { margin: 0; }

@media (max-width: 760px) {
  .drops { grid-template-columns: 1fr; }
  .vs { justify-content: center; transform: rotate(90deg); }
}