/* Shares the design tokens of the Falklands Lee Wave Regime Tool and the
   Barthram Night Cooling Tool, so the three pages read as one family. */
:root{
  color-scheme:light;
  --bg:#f2f0eb; --card:#ffffff; --ink:#1b2327; --muted:#5b6770; --line:#d8d4ca; --soft:#ebe8e0;
  --accent:#0f5e63; --accent-ink:#ffffff; --plot:#fbfaf7; --grid:#e6e2d9; --axis:#6b747b;
  --c-all:#8a8f94; --c-summer:#c62828; --c-winter:#2d6db3;
  --warn-bg:#fff3d6; --warn-ink:#6a4300; --info-bg:#e6f0f1; --info-ink:#0d4a4e;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}

/* ---------- header ---------- */
header{padding:20px 20px 4px;max-width:1280px;margin:0 auto}
.head-row{display:flex;justify-content:space-between;align-items:flex-end;gap:12px 20px;flex-wrap:wrap}
header h1{margin:0;font-size:22px;letter-spacing:-.01em}
header p{margin:2px 0 0;color:var(--muted);font-size:13.5px}

/* ---------- layout ---------- */
.app{max-width:1280px;margin:0 auto;padding:12px 20px 40px;display:grid;grid-template-columns:minmax(270px,320px) minmax(0,1fr);gap:16px;align-items:start}
.col{display:flex;flex-direction:column;gap:16px;min-width:0}
@media (max-width:960px){.app{grid-template-columns:minmax(0,1fr)}}
@media (max-width:480px){header{padding:16px 16px 4px}.app{padding:12px 16px 32px}}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;min-width:0}
.card h2{margin:0 0 10px;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:650}
.h2-note{text-transform:none;letter-spacing:0;font-weight:400;margin-left:4px}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.card-head h2{margin:0}
.card-head select{width:auto;min-width:140px}

/* ---------- controls ---------- */
.row{margin:0 0 10px}
.row label{display:flex;justify-content:space-between;gap:8px;font-size:13.5px;margin-bottom:3px}
.row label .u{color:var(--muted);font-size:12.5px}
select{width:100%;padding:5px 7px;border:1px solid var(--line);border-radius:7px;background:var(--plot);color:var(--ink);font:inherit;font-size:14px}
select:focus{outline:2px solid var(--accent);outline-offset:0}
.sub{font-size:12px;color:var(--muted);margin:-4px 0 8px}
.tiny{font-size:12px;color:var(--muted)}
.opts{display:flex;flex-direction:column;gap:6px}
.opt{display:grid;grid-template-columns:auto 1fr;gap:8px;align-items:center;padding:7px 10px;border:1px solid var(--line);border-radius:8px;cursor:pointer;font-size:13.5px}
.opt input{accent-color:var(--accent);margin:0}
.opt small{display:block;color:var(--muted);font-size:11.5px}
.opt:has(input:checked){border-color:var(--accent);background:var(--info-bg)}
.chk{display:flex;align-items:center;gap:8px;font-size:13.5px;margin:6px 0;cursor:pointer}
.chk input{accent-color:var(--accent);margin:0}
.swatch{display:inline-block;width:14px;height:3px;border-radius:2px}
.sw-all{background:var(--c-all)} .sw-summer{background:var(--c-summer)} .sw-winter{background:var(--c-winter)}
button{font:inherit;font-size:13px;padding:6px 11px;border-radius:8px;border:1px solid var(--line);background:var(--soft);color:var(--ink);cursor:pointer}
button:hover{border-color:var(--accent)}
.btns{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;align-items:center}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--card)}
.seg button{border:0;border-radius:0;background:transparent;padding:5px 12px}
.seg button.active{background:var(--accent);color:var(--accent-ink)}

/* ---------- map ---------- */
#map{height:550px;width:100%;border-radius:8px;border:1px solid var(--line);background:var(--plot)}
@media (max-width:600px){#map{height:420px}}
.leaflet-container{font:inherit}
.leaflet-popup-content{font-size:13px}
.leaflet-div-icon.gust-marker{background:transparent;border:none}
.gust-marker-inner{border-radius:50%;text-align:center;font-size:10px;font-weight:700;font-variant-numeric:tabular-nums;box-shadow:0 0 0 1px rgba(255,255,255,.7),0 1px 3px rgba(0,0,0,.4);cursor:pointer}
.map-legend{position:absolute;bottom:22px;right:12px;background:var(--card);color:var(--ink);border:1px solid var(--line);padding:8px 12px;border-radius:10px;font-size:12px;z-index:1000;line-height:1.45}
.map-legend .legend-title{font-weight:650;margin-bottom:4px}
.map-legend .legend-gradient{width:140px;height:12px;border-radius:6px;margin:4px 0}
.map-legend .legend-labels{display:flex;justify-content:space-between;color:var(--muted);font-variant-numeric:tabular-nums}

/* ---------- plot + tables ---------- */
#detail-plot{width:100%;height:450px;border-radius:8px;background:var(--plot);border:1px solid var(--line);overflow:hidden}
@media (max-width:600px){#detail-plot{height:360px}}
.scrollx{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:13px}
th,td{text-align:left;padding:5px 6px;border-bottom:1px solid var(--line);vertical-align:top;font-variant-numeric:tabular-nums}
th{color:var(--muted);font-weight:600;font-size:12px;white-space:nowrap}
tbody tr:last-child td{border-bottom:0}
td.empty{color:var(--muted)}

/* ---------- user guide ---------- */
#page-guide{max-width:900px;margin:0 auto;padding:12px 20px 40px}
@media (max-width:480px){#page-guide{padding:12px 16px 32px}}
.guide-content{padding:18px 22px;font-size:14.5px;line-height:1.6}
.guide-content h3{margin:22px 0 4px;font-size:15px}
.guide-content h3:first-of-type{margin-top:4px}
.guide-content p{margin:0}
a{color:var(--accent)}

/* ---------- footer ---------- */
footer{max-width:1240px;margin:0 auto;padding:0 20px 30px;color:var(--muted);font-size:12px}
footer .warn-line{background:var(--warn-bg);color:var(--warn-ink);border-radius:8px;padding:7px 10px;font-size:13px;margin:0 0 12px}