:root, :root[data-theme="dark"] {
  --bg: #0f1115;
  --bg-soft: #13161d;
  --fg: #e7e9ee;
  --muted: #9aa3b2;
  --card: #171a21;
  --border: #262a33;
  --accent: #7cc4ff;
  --accent-soft: rgba(124, 196, 255, 0.12);
  --pass: #4ade80;
  --fail: #f87171;
  --chart-tick: #9aa3b2;
  --chart-grid: #262a33;
}
:root[data-theme="light"] {
  --bg: #f7f8fa;
  --bg-soft: #ffffff;
  --fg: #1a1d24;
  --muted: #5b6472;
  --card: #ffffff;
  --border: #e1e5eb;
  --accent: #0969da;
  --accent-soft: rgba(9, 105, 218, 0.08);
  --pass: #1a7f37;
  --fail: #cf222e;
  --chart-tick: #5b6472;
  --chart-grid: #e1e5eb;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

/* === Header === */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  padding: 1.5rem 2rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.page-header h1 { margin: 0 0 .25rem; font-size: 1.4rem; }
.page-header .sub { margin: 0; color: var(--muted); font-size: .9rem; }
.page-header .meta { margin: 0; color: var(--muted); font-size: .8rem; text-align: right; display: flex; align-items: center; gap: .75rem; }
.theme-toggle {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--fg);
  font-size: 1rem;
  line-height: 1;
  padding: .35rem .55rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.theme-toggle:hover { background: var(--accent-soft); border-color: var(--accent); }
.page-header a { color: var(--accent); text-decoration: none; }

/* === Control bar (sticky) === */
.control-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  padding: .85rem 2rem;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.ctrl { display: flex; align-items: center; gap: .5rem; font-size: .9rem; color: var(--muted); }
select {
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: .35rem .55rem;
  border-radius: 6px;
  font-size: .9rem;
}
fieldset {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 6px;
  padding: .35rem .75rem;
  display: flex;
  align-items: center;
  gap: .85rem;
  flex-wrap: wrap;
}
fieldset legend {
  color: var(--muted);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 0 .25rem;
}
fieldset label {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  cursor: pointer;
  color: var(--fg);
  font-size: .85rem;
}
fieldset input[type="checkbox"] { accent-color: var(--accent); }
.model-size { color: var(--muted); font-size: .75rem; font-weight: 400; }

/* === KPIs === */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: .75rem;
  padding: 1.25rem 2rem 0;
}
.kpi {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .85rem 1rem;
}
.kpi .label { color: var(--muted); font-size: .7rem; text-transform: uppercase; letter-spacing: .05em; }
.kpi .value { font-size: 1.3rem; font-weight: 600; margin-top: .2rem; }
.kpi .sub-value { color: var(--muted); font-size: .75rem; margin-top: .15rem; }

/* === Tabs === */
.tabs {
  display: flex;
  gap: .25rem;
  padding: 1.25rem 2rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}
.tab {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  color: var(--muted);
  padding: .55rem 1.1rem;
  cursor: pointer;
  font-size: .9rem;
  border-radius: 6px 6px 0 0;
  transition: background .15s, color .15s;
}
.tab:hover { color: var(--fg); background: var(--accent-soft); }
.tab.active {
  color: var(--accent);
  background: var(--card);
  border-color: var(--border);
  border-bottom-color: var(--card);
  position: relative;
  top: 1px;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* === Grid + cards === */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 1.5rem 2rem 2rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
}
.card.full { grid-column: 1 / -1; }
.card h2 { margin: 0 0 .25rem; font-size: 1rem; color: var(--fg); font-weight: 600; }
.card .hint { color: var(--muted); font-size: .8rem; margin: 0 0 .75rem; }
canvas { max-height: 380px; }

/* === Scores by test === */
#scores-by-test { display: flex; flex-direction: column; gap: 1rem; }
.test-block {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .75rem 1rem;
  background: var(--bg-soft);
}
.test-block h3 {
  margin: 0 0 .5rem;
  font-size: .9rem;
  color: var(--accent);
}
.test-block .summary { font-size: .8rem; color: var(--muted); margin: 0 0 .5rem; }
.criteria-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}
.criteria-table th, .criteria-table td {
  padding: .35rem .5rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.criteria-table th { color: var(--muted); font-weight: 500; font-size: .75rem; text-transform: uppercase; }
.criteria-table td .badge {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: 4px;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .03em;
}
.criteria-table td .badge.pass { background: rgba(74, 222, 128, 0.15); color: var(--pass); }
.criteria-table td .badge.fail { background: rgba(248, 113, 113, 0.15); color: var(--fail); }
.criteria-table td .detail { color: var(--muted); font-size: .75rem; margin-left: .35rem; }

/* === Responses tab === */
.resp-controls { padding: 1.5rem 2rem 0; display: flex; gap: 1rem; flex-wrap: wrap; }
#test-description {
  margin: 1rem 2rem;
}
#test-description h3 { margin: 0 0 .35rem; font-size: 1rem; color: var(--accent); }
#test-description .meta { color: var(--muted); font-size: .8rem; margin: 0 0 .75rem; }
#test-description dl { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1rem; }
#test-description dt { color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .03em; padding-top: .35rem; }
#test-description dd { margin: 0; }
#test-description pre, .response-card pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .75rem;
  overflow-x: auto;
  white-space: pre-wrap;
  font-size: .82rem;
  margin: 0;
}
#responses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1rem;
  padding: 0 2rem 2rem;
}
.response-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
}
.response-card h3 { margin: 0; font-size: .95rem; }
.response-card .stats { color: var(--muted); font-size: .78rem; margin: .15rem 0 .65rem; }
.response-card pre { flex: 1; margin-bottom: .65rem; }
.response-card .scores { font-size: .78rem; }
.response-card .scores .label { color: var(--muted); text-transform: uppercase; font-size: .7rem; letter-spacing: .05em; }
.response-card .scores ul { margin: .25rem 0 0; padding: 0; list-style: none; }
.response-card .scores li {
  display: flex; gap: .35rem; align-items: baseline;
  padding: .15rem 0;
}
.response-card .scores li .badge {
  display: inline-block;
  padding: .05rem .35rem;
  border-radius: 3px;
  font-size: .65rem;
  font-weight: 600;
  flex-shrink: 0;
}
.response-card .scores li .badge.pass { background: rgba(74, 222, 128, 0.15); color: var(--pass); }
.response-card .scores li .badge.fail { background: rgba(248, 113, 113, 0.15); color: var(--fail); }

/* === Footer === */
footer {
  padding: 1.5rem 2rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .8rem;
}
footer code { background: var(--card); padding: .1rem .35rem; border-radius: 4px; }

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .page-header, .control-bar, .grid, .kpis, .tabs, .resp-controls, footer, #test-description {
    padding-left: 1rem; padding-right: 1rem;
  }
  #responses-grid { padding: 0 1rem 2rem; }
}