:root {
  --bg: #f5f6f8; --panel: #fff; --ink: #1a1e23; --muted: #5d6672; --line: #d9dee5; --accent: #1f5fbf;
  --yes: #1e7a3c; --yes-bg: #e7f4ea; --maybe: #8a5a00; --maybe-bg: #fff4dc; --no: #b3261e; --no-bg: #fbe9e7;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171b; --panel: #1d2127; --ink: #e8ebef; --muted: #9aa4b1; --line: #313842; --accent: #6ea2ff;
    --yes: #6fcf8f; --yes-bg: #173322; --maybe: #f0c060; --maybe-bg: #3a2f14; --no: #ff8a80; --no-bg: #3a1b19; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 system-ui, "Segoe UI", sans-serif; }
header { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 12px 20px; background: var(--panel); border-bottom: 1px solid var(--line); }
nav { display: flex; gap: 16px; align-items: center; }
nav a { color: var(--muted); text-decoration: none; } nav a.active, nav a:hover { color: var(--accent); }
main { max-width: 980px; margin: 0 auto; padding: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin-bottom: 16px; }
.narrow { max-width: 420px; margin: 40px auto; }
h1 { font-size: 20px; margin: 0 0 6px; } h2 { font-size: 16px; margin: 0 0 10px; } h3 { font-size: 15px; margin: 0 0 4px; }
.muted { color: var(--muted); font-size: 13px; }
label { display: block; margin: 10px 0; font-weight: 600; font-size: 13px; }
input, select { display: block; width: 100%; margin-top: 4px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--bg); color: var(--ink); font: inherit; font-weight: 400; }
button { font: inherit; cursor: pointer; border-radius: 6px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 9px 14px; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.link { border: 0; background: none; color: var(--muted); padding: 0; }
button:disabled { opacity: .6; cursor: wait; }
.tabs { display: flex; gap: 8px; margin-bottom: 8px; }
.tabs button.on { border-color: var(--accent); color: var(--accent); }
.err { color: var(--no); min-height: 1em; font-size: 14px; }
.drop { border: 2px dashed var(--line); border-radius: 10px; padding: 28px; text-align: center; cursor: pointer; font-weight: 400; color: var(--muted); }
.drop.over { border-color: var(--accent); }
.drop input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.row { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; }
.row label { flex: 1; min-width: 180px; margin-bottom: 0; }
.std { border: 1px solid var(--line); border-left: 4px solid var(--yes); border-radius: 8px; padding: 10px 12px; margin: 8px 0; }
.std.maybe { border-left-color: var(--maybe); }
.std .clause { color: var(--muted); font-size: 13px; }
.std ul { margin: 6px 0 0; padding-left: 18px; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: 12px; font-weight: 600; }
.pill.yes { background: var(--yes-bg); color: var(--yes); } .pill.unknown { background: var(--maybe-bg); color: var(--maybe); }
.pill.no { background: var(--no-bg); color: var(--no); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 6px 16px; }
.fact { display: flex; justify-content: space-between; gap: 8px; border-bottom: 1px solid var(--line); padding: 4px 0; font-size: 14px; }
.history { list-style: none; padding: 0; margin: 0; }
.history li { display: flex; justify-content: space-between; gap: 8px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.history a { color: var(--accent); cursor: pointer; }
.banner { padding: 10px 12px; border-radius: 8px; background: var(--maybe-bg); color: var(--maybe); margin: 8px 0; font-size: 14px; }
.spin { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--accent);
  border-radius: 50%; animation: s 1s linear infinite; vertical-align: -2px; margin-right: 6px; }
@keyframes s { to { transform: rotate(360deg); } }
@media print { header, #reviewForm, .history, .noprint { display: none !important; } body { background: #fff; } .card { border-color: #999; } }
.choices { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 8px; margin-bottom: 12px; }
.choices button { text-align: left; padding: 10px 12px; }
.choices button small { display: block; color: var(--muted); font-size: 12px; }
.choices button.on { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.steps { padding-left: 20px; } .steps li { margin: 10px 0; }
textarea { display: block; width: 100%; margin-top: 6px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--bg); color: var(--ink); font: 13px/1.4 ui-monospace, Consolas, monospace; resize: vertical; }
label.inline { display: flex; gap: 8px; align-items: center; font-weight: 400; }
label.inline input { width: auto; margin: 0; }
a { color: var(--accent); }

.narrow-card { max-width: 520px; margin-left: auto; margin-right: auto; }
fieldset { border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; margin: 10px 0; }
.code { font: 600 15px ui-monospace, Consolas, monospace; padding: 8px 10px; border: 1px dashed var(--line); border-radius: 6px; }
.keyrow { display: flex; gap: 8px; align-items: end; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding: 8px 0; }
.keyrow label { flex: 1; min-width: 220px; margin: 0; }
h3 { margin-top: 16px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }
.grid3 label small { display: block; font-weight: 400; color: var(--muted); }
.pair { display: flex; gap: 6px; } .pair input { flex: 2; } .pair select { flex: 1; }
.issue { border-left: 4px solid var(--maybe); padding: 8px 12px; margin: 8px 0; border-radius: 6px; background: var(--maybe-bg); }
.issue.error { border-left-color: var(--no); background: var(--no-bg); }
.issue.info { border-left-color: var(--accent); background: transparent; border: 1px solid var(--line); border-left: 4px solid var(--accent); }
.issue b { display: block; } .issue span { font-size: 14px; }
.targets td, .targets th { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; }
.targets { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.v-match { color: var(--yes); font-weight: 700; } .v-low, .v-high { color: var(--no); font-weight: 700; }