:root {
  --bg: #f6f7f9; --panel: #fff; --text: #1d2330; --muted: #667085; --line: #e3e6ea;
  --accent: #1f6feb; --accent-ink: #fff; --error-bg: #fdecec; --error: #b42318;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1218; --panel: #171b23; --text: #e6e8ec; --muted: #98a2b3; --line: #2a303b;
    --accent: #4c8dff; --error-bg: #3a1717; --error: #ff8a80; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--accent); }
h1 { font-size: 1.6rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 .4rem; }
.muted { color: var(--muted); }
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px;
  padding: .6rem 1.1rem; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn.small { padding: .35rem .7rem; font-size: .85rem; }
button.link { background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1.2rem; }
.error { background: var(--error-bg); color: var(--error); padding: .7rem 1rem; border-radius: 8px; }
label { display: block; font-weight: 600; font-size: .85rem; margin-bottom: .8rem; }
input, select, textarea { display: block; width: 100%; margin-top: .3rem; padding: .55rem .65rem; font: inherit;
  font-weight: 400; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
input[type=radio], input[type=checkbox] { display: inline; width: auto; margin: 0 .3rem 0 0; }
label.inline { display: inline-flex; align-items: center; gap: .5rem; }
label.inline input { width: 6rem; margin: 0; }

/* Landing + docs */
.landing, .doc { max-width: 860px; margin: 0 auto; padding: 3rem 1rem; }
.hero h1 { font-size: 2.2rem; line-height: 1.2; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; color: var(--muted); margin: 0; }
.lead { font-size: 1.1rem; color: var(--muted); }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin: 2rem 0; }
.features > div { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1rem; }
.features h2 { margin-top: 0; }
.foot { text-align: center; color: var(--muted); font-size: .85rem; padding: 2rem 1rem; }
.login { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.login .card { width: 100%; max-width: 360px; }

/* App */
.topbar { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; padding: .8rem 1rem;
  background: var(--panel); border-bottom: 1px solid var(--line); }
.topbar .brand { font-weight: 700; color: var(--text); text-decoration: none; }
.topbar nav { display: flex; gap: 1rem; flex-wrap: wrap; flex: 1; }
.topbar nav a { color: var(--muted); text-decoration: none; }
.topbar nav a.active { color: var(--text); font-weight: 600; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 1.5rem 1rem; }
.tool-form { margin: 1rem 0; }
.grid4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0 1rem; }
.seg { display: flex; gap: 1.2rem; flex-wrap: wrap; margin-bottom: .8rem; }
.seg label { font-weight: 400; margin: 0; }
.loc-results { position: relative; }
.loc-results button { display: block; width: 100%; text-align: left; padding: .4rem .6rem; border: 1px solid var(--line);
  border-top: 0; background: var(--panel); color: var(--text); font: inherit; font-weight: 400; cursor: pointer; }
.table-tools { display: flex; align-items: center; gap: .8rem; flex-wrap: wrap; margin: 1rem 0 .5rem; }
.table-tools .filter { width: auto; margin: 0; }
.table-tools form { margin: 0; }
.table-wrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
table.results { width: 100%; border-collapse: collapse; font-size: .9rem; }
.results th, .results td { padding: .5rem .7rem; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.results th { position: sticky; top: 0; background: var(--panel); cursor: pointer; font-size: .8rem; color: var(--muted); }
.results .num { text-align: right; font-variant-numeric: tabular-nums; }
.spark polyline { fill: none; stroke: var(--accent); stroke-width: 1.5; }
.kw-list { font-family: ui-monospace, Consolas, monospace; }