:root {
  --blue: #1565c0;
  --ink: #1f2933;
  --muted: #6b7785;
  --line: #e3e8ee;
  --bg: #ffffff;
  --panel-w: 440px;
  --head-h: 64px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: var(--bg); }
body { display: flex; flex-direction: column; }
a { color: var(--blue); }
h1, h2, h3 { margin: 0; font-weight: 650; }
.muted { color: var(--muted); }

header#top {
  min-height: var(--head-h); flex: none; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0 1rem; border-bottom: 1px solid var(--line); background: var(--bg); position: relative; z-index: 5;
}
.brand { display: flex; align-items: center; gap: .6rem; min-width: 0; }
.brand .logo { font-size: 1.6rem; }
.brand h1 { font-size: 1.05rem; }
.brand .tagline { margin: 0; font-size: .78rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.controls { display: flex; align-items: center; gap: .6rem; position: relative; flex-wrap: wrap; justify-content: flex-end; }
#search { width: 260px; padding: .45rem .6rem; border: 1px solid var(--line); border-radius: 8px; font-size: .9rem; }
.search-results { position: absolute; top: calc(100% + 4px); right: 0; width: 360px; max-height: 320px; overflow: auto; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.12); z-index: 20; }
.search-results .hit { padding: .4rem .6rem; cursor: pointer; font-size: .85rem; display: flex; gap: .5rem; align-items: center; }
.search-results .hit:hover { background: #f4f7fb; }
.search-results .hit i, .chip i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex: none; }
.legend { display: flex; gap: .3rem; flex-wrap: wrap; }
.chip { display: inline-flex; align-items: center; gap: .35rem; border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: .2rem .55rem; font-size: .74rem; cursor: pointer; color: var(--ink); }
.chip em { font-style: normal; color: var(--muted); }
.chip.off { opacity: .4; text-decoration: line-through; }
.count { font-size: .8rem; color: var(--muted); white-space: nowrap; }

main { display: flex; flex: 1; min-height: 0; }
#map { flex: 1; min-width: 0; }
.panel { width: var(--panel-w); flex: none; overflow: auto; border-left: 1px solid var(--line); padding: 1rem; background: #fff; }
.panel-empty h2 { font-size: 1.1rem; margin-bottom: .4rem; }
.panel-empty p { font-size: .9rem; line-height: 1.45; }
.tips { font-size: .85rem; margin-top: .6rem; }
.tips summary { cursor: pointer; color: var(--blue); }
.tips ul { padding-left: 1.1rem; line-height: 1.5; }

.station-head .badge { display: inline-block; color: #fff; font-size: .72rem; padding: .15rem .5rem; border-radius: 999px; margin-bottom: .35rem; }
.station-head h2 { font-size: 1.15rem; line-height: 1.25; }
.st-meta { font-size: .8rem; color: var(--muted); margin: .25rem 0 .6rem; }
.st-actions { display: flex; gap: .4rem; flex-wrap: wrap; }
.catchment { font-size: .8rem; margin: -.3rem 0 .6rem; padding: .3rem .5rem; border-left: 3px solid #1565c0; background: #f4f7fb; border-radius: 0 6px 6px 0; }
.catchment[hidden] { display: none; }
.basin { font-size: .8rem; margin: -.2rem 0 .6rem; padding: .4rem .55rem; border-left: 3px solid #6a1b9a; background: #f8f4fb; border-radius: 0 6px 6px 0; }
.basin[hidden] { display: none; }
.basin .kv { display: grid; grid-template-columns: 1fr 1fr; gap: .1rem .8rem; margin-top: .3rem; }
.basin .kv div { display: flex; justify-content: space-between; gap: .4rem; border-bottom: 1px dotted var(--line); padding: .1rem 0; }
.basin .kv b { font-weight: 600; white-space: nowrap; }
.basin .basin-foot { margin-top: .3rem; font-size: .72rem; }
.chip.basins-toggle i { border-radius: 2px; }
.nearest.similar li { cursor: pointer; }
.nearest.similar .dist { white-space: nowrap; }
.regime { margin-top: .6rem; }
.regime h3 { margin-bottom: .2rem; }
table.regime td:first-child { white-space: nowrap; }
.btn { font: inherit; font-size: .8rem; padding: .35rem .65rem; border-radius: 8px; border: 1px solid var(--line); background: #fff; color: var(--ink); cursor: pointer; text-decoration: none; }
.btn:hover:not(:disabled) { background: #f4f7fb; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.small { font-size: .75rem; margin: .4rem 0; }

.status { margin: .8rem 0; padding: .55rem .7rem; border-radius: 8px; font-size: .85rem; background: #eef4fb; color: #0d47a1; }
.status.warn { background: #fff7e6; color: #8a5a00; }
.status.error { background: #fdecea; color: #b71c1c; }
.status[hidden] { display: none; }

section { margin-top: 1rem; }
section h3 { font-size: .95rem; margin-bottom: .35rem; }
.kpis { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; }
.kpi { border: 1px solid var(--line); border-radius: 10px; padding: .5rem .6rem; }
.kpi .l { font-size: .7rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.kpi .v { font-size: 1rem; font-weight: 650; margin: .1rem 0; }
.kpi .s { font-size: .72rem; color: var(--muted); }
.plot { width: 100%; }
table.ffa { width: 100%; border-collapse: collapse; font-size: .82rem; }
table.ffa th, table.ffa td { text-align: right; padding: .3rem .4rem; border-bottom: 1px solid var(--line); }
table.ffa th:first-child, table.ffa td:first-child { text-align: left; }
table.ffa .ci { color: var(--muted); font-size: .74rem; }
#notes { padding-left: 1.1rem; font-size: .8rem; color: var(--muted); line-height: 1.45; }
#methods { padding-left: 1.1rem; font-size: .8rem; line-height: 1.45; }
#methods .cite { color: var(--muted); font-size: .76rem; }
#sec-methods summary { cursor: pointer; font-size: .9rem; font-weight: 600; }
.maplibregl-popup-content { font-size: .8rem; padding: .4rem .6rem; }

@media (max-width: 860px) {
  main { flex-direction: column; }
  #map { height: 46vh; flex: none; }
  .panel { width: 100%; border-left: 0; border-top: 1px solid var(--line); flex: 1; }
  .brand .tagline { display: none; }
  #search { width: 160px; }
  .legend { display: none; }
}

.nearest { list-style: none; padding: 0; margin: 0; font-size: .85rem; }
.nearest li { display: flex; gap: .5rem; align-items: center; padding: .3rem 0; border-bottom: 1px solid var(--line); cursor: pointer; }
.nearest li:hover { background: #f4f7fb; }
.nearest li i { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.nearest .dist { margin-left: auto; color: var(--muted); font-size: .78rem; white-space: nowrap; }

/* ── Ask panel (the Analyst in the browser) ───────────────────────────────── */
.ask-toggle { background: #6a1b9a; color: #fff; border-color: #6a1b9a; font-weight: 600; }
.ask-toggle:hover:not(:disabled) { background: #7b1fa2 !important; }
.btn.primary { background: var(--blue); color: #fff; border-color: var(--blue); font-weight: 600; }
.btn.primary:hover:not(:disabled) { background: #0d47a1 !important; }
.ask-settings { border: 1px solid var(--line); border-radius: 8px; padding: .5rem .7rem; margin: .6rem 0; font-size: .85rem; }
.ask-settings summary { cursor: pointer; color: var(--blue); }
.ask-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem .7rem; margin-top: .5rem; }
.ask-grid label { display: flex; flex-direction: column; gap: .2rem; font-size: .78rem; color: var(--muted); }
.ask-grid input, .ask-grid select { font: inherit; font-size: .85rem; color: var(--ink); padding: .35rem .45rem; border: 1px solid var(--line); border-radius: 6px; width: 100%; }
.ask-grid .ask-remember { grid-column: 1 / -1; flex-direction: row; align-items: center; gap: .4rem; }
.ask-grid .ask-remember input { width: auto; }
.ask-privacy { font-size: .76rem; line-height: 1.4; margin: .5rem 0 0; }
#ask-question { width: 100%; font: inherit; font-size: .9rem; padding: .5rem .6rem; border: 1px solid var(--line); border-radius: 8px; resize: vertical; margin-top: .4rem; }
.ask-examples { display: flex; flex-wrap: wrap; gap: .3rem; margin: .4rem 0 .6rem; }
.ask-examples .chip { font-size: .72rem; }
.ask-log { margin: .6rem 0 0; padding-left: 1.2rem; font-size: .78rem; color: var(--muted); line-height: 1.5; max-height: 160px; overflow: auto; }
.ask-log li code { font-size: .74rem; }
.ask-log[hidden] { display: none; }
.ask-stations { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: .6rem; }
.ask-stations[hidden] { display: none; }
.ask-result { margin-top: .8rem; font-size: .88rem; line-height: 1.5; }
.ask-result[hidden] { display: none; }
.ask-result h1 { font-size: 1.05rem; margin: .2rem 0 .5rem; }
.ask-result h2 { font-size: .95rem; margin: 1rem 0 .3rem; }
.ask-result h3 { font-size: .9rem; margin: .8rem 0 .3rem; }
.ask-result p { margin: .35rem 0; }
.ask-result ul, .ask-result ol { padding-left: 1.2rem; margin: .3rem 0; }
.ask-result li { margin: .15rem 0; }
.ask-result code { background: #f4f7fb; padding: 0 .25rem; border-radius: 4px; font-size: .82rem; }
.ask-result pre { background: #f4f7fb; padding: .5rem .6rem; border-radius: 8px; overflow: auto; font-size: .8rem; }
.ask-result table { border-collapse: collapse; width: 100%; font-size: .82rem; margin: .4rem 0; }
.ask-result th, .ask-result td { border: 1px solid var(--line); padding: .25rem .4rem; text-align: left; }
.ask-result th { background: #f4f7fb; }
.ask-result hr { border: 0; border-top: 1px solid var(--line); margin: .8rem 0; }
.ask-result .foot { font-size: .76rem; color: var(--muted); }