:root {
  --ink: #0f172a;
  --muted: #5b667a;
  --line: #dfe4ec;
  --line-strong: #c3ccd9;
  --bg: #ffffff;
  --panel: #f7f9fc;
  --accent: #4338ca;
  --accent-soft: #f1f0ff;
  --pass: #15803d;
  --warn: #a16207;
  --fail: #b3261e;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 34px 22px 72px; }

header.top { border-bottom: 1px solid var(--line); padding-bottom: 18px; }

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 650;
  margin: 0 0 6px;
}

h1 { font-size: 27px; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.015em; }

.lede { margin: 0; color: var(--muted); max-width: 74ch; }
.lede strong { color: var(--ink); font-weight: 600; }

.metrics {
  margin: 14px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-size: 13px;
  color: var(--muted);
}
.metrics b { color: var(--ink); font-weight: 600; }

.tabs {
  display: flex;
  gap: 4px;
  margin: 22px 0 26px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.tab {
  appearance: none;
  border: 0;
  background: none;
  font: inherit;
  font-size: 14px;
  font-weight: 550;
  color: var(--muted);
  padding: 9px 12px 10px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.panel[hidden] { display: none; }

h2 { font-size: 17px; margin: 34px 0 10px; letter-spacing: -0.01em; }
h2:first-child { margin-top: 0; }
h3 { font-size: 14px; margin: 22px 0 8px; }
p { margin: 0 0 12px; }

.note { color: var(--muted); font-size: 13px; }
.small { font-size: 12.5px; }
.nowrap { white-space: nowrap; }

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0 0 18px;
}

table { border-collapse: collapse; width: 100%; font-size: 13px; }

th, td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  background: var(--panel);
  font-weight: 650;
  white-space: nowrap;
  border-bottom: 1px solid var(--line-strong);
}
tbody tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr.clickable { cursor: pointer; }
tbody tr.clickable:hover td { background: var(--accent-soft); }
tbody tr.selected td { background: var(--accent-soft); }
tbody tr.row-worst td { background: #fff7ed; }

code, .mono { font-family: var(--mono); font-size: 12.5px; }
code {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.5px 4px;
}

.chip {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.02em;
  padding: 1px 7px;
  border-radius: 999px;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.chip.usable { color: var(--pass); }
.chip.directional { color: var(--warn); }
.chip.unusable { color: var(--fail); }
.chip.neutral { color: var(--muted); }

.bars { margin: 4px 0 22px; }

.bar-row {
  display: grid;
  grid-template-columns: 210px 1fr 58px;
  align-items: center;
  gap: 12px;
  margin: 7px 0;
  font-size: 13px;
}
.bar-track { height: 16px; background: #e8ecf3; border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 4px; }
.bar-val { text-align: right; font-variant-numeric: tabular-nums; }
.fill-usable { background: var(--pass); }
.fill-directional { background: #ca8a04; }
.fill-unusable { background: var(--fail); }

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 26px;
  align-items: flex-end;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  margin-bottom: 20px;
}
.field { display: flex; flex-direction: column; gap: 5px; }
.field > span {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  font-weight: 650;
}
select, textarea {
  font: inherit;
  font-size: 13.5px;
  padding: 6px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}
select { max-width: min(420px, 70vw); }
textarea { width: 100%; min-height: 200px; font-family: var(--mono); font-size: 12px; line-height: 1.5; }

button.act {
  appearance: none;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-size: 13.5px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
}
button.act.ghost { background: #fff; color: var(--accent); }
button.act:hover { filter: brightness(1.06); }
button.act:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.prompt {
  background: var(--panel);
  border-left: 3px solid var(--accent);
  padding: 9px 12px;
  border-radius: 0 6px 6px 0;
  white-space: pre-wrap;
  font-size: 13px;
  overflow-wrap: anywhere;
  margin: 6px 0 12px;
}

details { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; margin: 0 0 14px; }
summary { cursor: pointer; font-weight: 600; font-size: 13.5px; }
details ul { margin: 10px 0 2px; padding-left: 20px; font-size: 13.5px; }
details li { margin: 6px 0; }

.report-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 0 0 16px;
}
.report-card h3 { margin-top: 0; }

.verdict-line { display: flex; align-items: baseline; gap: 10px; font-weight: 700; font-size: 15px; }
.verdict-line .score { font-variant-numeric: tabular-nums; }
.v-usable { color: var(--pass); }
.v-directional { color: var(--warn); }
.v-unusable { color: var(--fail); }

ul.flags { margin: 8px 0 0; padding-left: 18px; font-size: 13px; color: var(--muted); }
ul.flags li { margin: 2px 0; }

footer {
  margin-top: 44px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
}
footer a { color: var(--accent); }
a { color: var(--accent); }

.load-error {
  border: 1px solid var(--fail);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--fail);
  font-size: 13.5px;
}

.stack { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 860px) { .stack { grid-template-columns: 1fr; } }