/* app.css — zero dependencies, system fonts only, works offline and on low-end Android.
   Palette follows Bangladeshi national-highway signage: white on deep green. */

:root{
  --sign:#0E5340; --sign-d:#082F25; --sign-l:#E4EDE8;
  --amber:#B67400; --amber-l:#F7EBD4;
  --red:#A3302A;  --red-l:#F6E3E0;
  --ink:#131A18; --ink2:#3C4844; --ink3:#6B7A74;
  --rule:#D2DBD6; --rule2:#B4C1BB;
  --bg:#F2F4F2; --surface:#FFF; --surface2:#E9EDEA;
  --sev-info:#6B7A74; --sev-minor:#7A8F3F; --sev-moderate:#B67400;
  --sev-major:#C2571E; --sev-severe:#A3302A;
  --focus:#0E5340;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    --sign:#4DBE98; --sign-d:#0A231C; --sign-l:#133027;
    --amber:#E0A73F; --amber-l:#33260F;
    --red:#E4867C; --red-l:#341C1A;
    --ink:#E8EEEB; --ink2:#B4C1BB; --ink3:#85958E;
    --rule:#27332E; --rule2:#3A4842;
    --bg:#0C1211; --surface:#131B19; --surface2:#1B2422;
    --sev-info:#85958E; --sev-minor:#A6C168; --sev-moderate:#E0A73F;
    --sev-major:#E89355; --sev-severe:#E4867C;
    --focus:#4DBE98;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans Bengali",
              "Nirmala UI","Vrinda","SolaimanLipi",system-ui,sans-serif;
  font-size:16px;line-height:1.55;
}
html[data-lang=bn] body{line-height:1.75}
:focus-visible{outline:2.5px solid var(--focus);outline-offset:2px;border-radius:3px}
button{font:inherit;color:inherit}

/* ---- header ---- */
.top{background:var(--sign-d);color:#EAF4EF;border-bottom:3px solid var(--sign)}
.top-in{max-width:1180px;margin:0 auto;padding:12px 16px;display:flex;gap:16px;
  align-items:center;flex-wrap:wrap;justify-content:space-between}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.shield{width:38px;height:38px;flex:0 0 auto;border:2px solid #EAF4EF;border-radius:5px;
  display:grid;place-items:center;font-weight:800;font-size:13px;letter-spacing:.02em;color:#FFF}
.brand h1{margin:0;font-size:17px;font-weight:700;line-height:1.2;color:#FFF}
.brand p{margin:1px 0 0;font-size:11.5px;color:#9CCBB6;line-height:1.35}
.top-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.chip{background:transparent;border:1px solid #3E6B5B;color:#CBE3D8;border-radius:4px;
  padding:5px 10px;font-size:12.5px;cursor:pointer}
.chip[aria-pressed=true]{background:#EAF4EF;color:var(--sign-d);border-color:#EAF4EF;font-weight:600}
.status-dot{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:#9CCBB6}
.status-dot i{width:8px;height:8px;border-radius:50%;background:#4DBE98;display:block}
.status-dot.stale i{background:var(--amber)}
.status-dot.down i{background:#E4867C}

/* ---- layout ---- */
.wrap{max-width:1180px;margin:0 auto;padding:16px}
.cols{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:16px;align-items:start}
@media (max-width:880px){.cols{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface);border:1px solid var(--rule);border-radius:6px}
.card-h{padding:12px 14px;border-bottom:1px solid var(--rule);display:flex;gap:12px;
  align-items:center;justify-content:space-between;flex-wrap:wrap}
.card-h h2{margin:0;font-size:14px;font-weight:700;letter-spacing:.01em}
.card-b{padding:14px}

/* ---- banner ---- */
.banner{border-radius:6px;padding:12px 14px;margin-bottom:14px;border-left:4px solid;
  display:flex;gap:12px;align-items:flex-start;font-size:14px}
.banner.ok{background:var(--sign-l);border-color:var(--sign);color:var(--ink)}
.banner.warn{background:var(--amber-l);border-color:var(--amber)}
.banner.bad{background:var(--red-l);border-color:var(--red)}
.banner b{display:block;margin-bottom:2px}
.banner button{margin-left:auto;flex:0 0 auto}

/* ---- road picker ---- */
.picker{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
select,input,textarea{font:inherit;padding:8px 10px;border:1px solid var(--rule2);
  border-radius:4px;background:var(--surface);color:var(--ink);max-width:100%}
label{font-size:12.5px;color:var(--ink3);display:block;margin-bottom:4px;font-weight:600}
.field{margin-bottom:12px}
.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}

/* ---- map ---- */
.map-holder{position:relative;background:var(--surface2);border-radius:4px;overflow:hidden}
.map-holder svg{display:block;width:100%;height:auto;touch-action:none;cursor:grab;
  user-select:none;-webkit-user-select:none;
  /* Bangladesh is nearly square, so an unclamped natural ratio runs off the screen.
     preserveAspectRatio="meet" letterboxes the drawing rather than distorting it. */
  max-height:min(62vh,600px);margin-inline:auto}
.map-holder svg:active{cursor:grabbing}
.map-tools{position:absolute;right:8px;top:8px;display:flex;flex-direction:column;gap:5px}
.map-tools button{width:32px;height:32px;border:1px solid var(--rule2);background:var(--surface);
  border-radius:4px;cursor:pointer;font-size:16px;line-height:1;display:grid;place-items:center}
/* Demo marking. Everything simulated carries this, everywhere it appears. */
.demo-chip{display:inline-flex;align-items:center;gap:3px;font-size:9.5px;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase;padding:2px 5px;border-radius:3px;
  border:1px dashed var(--amber);color:var(--amber);background:transparent;
  white-space:nowrap;vertical-align:1px}
.layer-btn[data-demo=true]{border-style:dashed}
.layer-btn[data-demo=true][aria-pressed=true]{background:var(--amber-l);
  border-color:var(--amber);color:var(--amber)}
.demo-note{display:flex;gap:10px;align-items:flex-start;padding:10px 14px;
  border:1px dashed var(--amber);background:var(--amber-l);border-radius:5px;
  font-size:12.5px;color:var(--ink2);margin-bottom:14px}
.demo-note b{color:var(--amber)}
.speedkey{display:flex;gap:10px;flex-wrap:wrap;font-size:11.5px;color:var(--ink3);margin-top:8px}
.speedkey span{display:inline-flex;align-items:center;gap:5px}
.speedkey i{width:14px;height:4px;border-radius:2px;display:block}
.corridor{display:flex;gap:18px;flex-wrap:wrap;align-items:baseline;font-size:13px}
.corridor b{font-size:21px;font-weight:700;font-variant-numeric:tabular-nums;
  display:block;line-height:1.1}
.corridor span{font-size:11px;color:var(--ink3);text-transform:uppercase;letter-spacing:.05em}
.layer-bar{display:flex;gap:6px;flex-wrap:wrap;padding:10px 14px;border-top:1px solid var(--rule)}
.layer-btn{white-space:nowrap}
.layer-bar-wrap{position:relative}
.layer-btn{border:1px solid var(--rule2);background:var(--surface);color:var(--ink2);
  border-radius:4px;padding:5px 10px;font-size:12.5px;cursor:pointer;display:inline-flex;
  align-items:center;gap:6px}
.layer-btn[aria-pressed=true]{background:var(--sign-l);border-color:var(--sign);color:var(--sign);font-weight:600}
.layer-btn:disabled{opacity:.45;cursor:not-allowed}
.layer-btn .c{font-family:ui-monospace,monospace;font-size:11px;opacity:.75}
.ctx-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.ctx-h{font-size:12px;font-weight:700;color:var(--ink3);text-transform:uppercase;
  letter-spacing:.05em;margin:0 0 7px}
.ctx-list{list-style:none;margin:0;padding:0;font-size:13px}
.ctx-list li{padding:5px 0;border-bottom:1px solid var(--rule);display:flex;gap:8px;
  justify-content:space-between;align-items:baseline}
.ctx-list li:last-child{border-bottom:none}
.ctx-list b{font-weight:600;color:var(--ink)}
.ctx-list span{color:var(--ink3);font-size:12px;white-space:nowrap;
  font-variant-numeric:tabular-nums}
.mixbar{display:flex;height:9px;border-radius:3px;overflow:hidden;margin:7px 0 5px;
  background:var(--surface2)}
.mixbar i{display:block;height:100%}
.mixkey{display:flex;gap:10px;flex-wrap:wrap;font-size:11px;color:var(--ink3)}
.mixkey span{display:inline-flex;align-items:center;gap:4px}
.mixkey i{width:8px;height:8px;border-radius:2px;display:block}
.map-legend{display:flex;gap:12px;flex-wrap:wrap;font-size:11.5px;color:var(--ink3);
  padding:9px 14px;border-top:1px solid var(--rule)}
.map-legend span{display:inline-flex;align-items:center;gap:5px}
.map-legend i{width:10px;height:10px;border-radius:50%;display:block}

/* ---- incident list ---- */
.inc-list{list-style:none;margin:0;padding:0}
.inc{border-bottom:1px solid var(--rule);padding:13px 14px;display:grid;
  grid-template-columns:34px minmax(0,1fr);gap:12px;cursor:pointer;background:none;
  width:100%;text-align:start;border-left:4px solid transparent;font:inherit}
.inc:last-child{border-bottom:none}
.inc:hover,.inc[aria-current=true]{background:var(--surface2)}
.inc[data-sev=severe]{border-left-color:var(--sev-severe)}
.inc[data-sev=major]{border-left-color:var(--sev-major)}
.inc[data-sev=moderate]{border-left-color:var(--sev-moderate)}
.inc[data-sev=minor]{border-left-color:var(--sev-minor)}
.inc[data-sev=info]{border-left-color:var(--sev-info)}
.inc-icon{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  font-size:15px;background:var(--surface2);color:var(--ink2)}
.inc-t{font-weight:700;font-size:14.5px;margin:0 0 2px;display:flex;gap:8px;
  align-items:baseline;flex-wrap:wrap}
.inc-m{font-size:12.5px;color:var(--ink3);margin:0;display:flex;gap:5px 10px;flex-wrap:wrap}
.inc-d{font-size:13.5px;color:var(--ink2);margin:5px 0 0}
.tag{font-size:10.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
  padding:2px 6px;border-radius:3px;white-space:nowrap}
.tag.closure{background:var(--red-l);color:var(--red)}
.tag.unverified{background:var(--amber-l);color:var(--amber)}
.tag.overdue{background:var(--amber-l);color:var(--amber)}
.tag.approx{background:var(--surface2);color:var(--ink3)}
.tag.foreign{background:var(--sign-l);color:var(--sign)}

/* ---- misc ---- */
.empty{padding:34px 16px;text-align:center;color:var(--ink3);font-size:14px}
.spin{width:15px;height:15px;border:2px solid var(--rule2);border-top-color:var(--sign);
  border-radius:50%;display:inline-block;animation:sp .8s linear infinite;vertical-align:-2px}
@keyframes sp{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spin{animation:none}*{transition:none!important}}
.bar{height:5px;background:var(--surface2);border-radius:3px;overflow:hidden;margin-top:8px}
.bar i{display:block;height:100%;background:var(--sign);width:0;transition:width .2s}
.btn{background:var(--sign);color:#FFF;border:none;border-radius:4px;padding:9px 15px;
  font-size:14px;font-weight:600;cursor:pointer}
.btn.ghost{background:transparent;color:var(--sign);border:1px solid var(--rule2)}
.btn.danger{background:var(--red)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.hint{font-size:12px;color:var(--ink3);margin-top:5px}
.hint.warn{color:var(--amber);font-weight:600}
.hint.bad{color:var(--red);font-weight:600}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(88px,1fr));gap:1px;
  background:var(--rule);border:1px solid var(--rule);border-radius:5px;overflow:hidden}
.stat{background:var(--surface);padding:11px 12px}
.stat b{display:block;font-size:20px;line-height:1.1;font-variant-numeric:tabular-nums}
.stat span{font-size:11px;color:var(--ink3);display:block;margin-top:3px}
.foot{max-width:1180px;margin:0 auto;padding:18px 16px 40px;font-size:12px;color:var(--ink3);
  border-top:1px solid var(--rule);margin-top:20px}
.foot a{color:var(--sign)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---- feature popup ---- */
.popup{
  position:fixed;z-index:40;max-width:290px;min-width:190px;
  background:var(--surface);border:1px solid var(--rule2);border-radius:6px;
  box-shadow:0 8px 26px rgba(0,0,0,.28);padding:12px 14px 12px;
  font-size:13px;line-height:1.5;color:var(--ink2);
}
.popup[hidden]{display:none}
/* `--arrow-x` is the marker's own x inside the card, set by placePopup(). A fixed
   `left:50%` was wrong the moment the card got clamped to a screen edge — which on a
   phone is most of the time — and an arrow pointing at nothing is worse than none. */
.popup::after{
  content:'';position:absolute;left:var(--arrow-x,50%);bottom:-7px;
  transform:translateX(-50%) rotate(45deg);
  width:12px;height:12px;background:var(--surface);
  border-right:1px solid var(--rule2);border-bottom:1px solid var(--rule2);
}
.popup.below::after{bottom:auto;top:-7px;
  border:none;border-left:1px solid var(--rule2);border-top:1px solid var(--rule2)}
.popup[data-noarrow]::after{display:none}
.popup h3{
  font-size:14px;margin:0 0 3px;color:var(--ink);font-weight:700;
  padding-right:20px;line-height:1.3;
}
.popup .kind{
  font-size:10px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink3);
  font-weight:600;margin:0 0 6px;display:flex;gap:6px;align-items:center;flex-wrap:wrap;
}
.popup dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:3px 12px}
.popup dt{color:var(--ink3);font-size:12px}
.popup dd{margin:0;color:var(--ink);font-size:12.5px;font-variant-numeric:tabular-nums}
.popup .close{
  position:absolute;top:6px;right:7px;width:22px;height:22px;border:none;background:none;
  color:var(--ink3);cursor:pointer;border-radius:4px;font-size:15px;line-height:1;
}
.popup .close:hover{background:var(--surface2);color:var(--ink)}
.popup .note{margin:8px 0 0;font-size:11.5px;color:var(--ink3)}

/* ---- narrow screens ----------------------------------------------------------
 * A traveller information service in Bangladesh is a phone service first, so this
 * is not a courtesy breakpoint. Three things actually break below ~560px and each
 * is fixed at the cause rather than by shrinking everything:
 *
 * 1. Thirteen wrapping layer buttons become five stacked rows and push the map off
 *    the screen. The bar becomes one horizontally scrolling strip instead, with a
 *    fade on the right edge so it is visible that there is more.
 * 2. 62vh of map leaves no room for the list once the columns are stacked.
 * 3. Every tap target has to clear 36px, which the 32px map tools did not.
 */
@media (max-width:560px){
  .wrap{padding:12px 10px}
  .top-in{padding:10px 12px;gap:10px}
  .brand h1{font-size:15.5px}
  .brand p{font-size:10.5px}
  .shield{width:32px;height:32px;font-size:12px}
  /* The build stamp and the connection label are for us, not for a traveller. */
  #build{display:none}
  .status-dot span{display:none}
  .top-actions{gap:6px}
  .chip{padding:6px 9px;font-size:12px}

  /* The road picker gets its own full-width row; severity and refresh share the next
     one. Three stacked rows pushed the map below the fold on a 740px phone. */
  .picker{gap:9px}
  .picker>div{min-width:0}
  .picker>div:first-child{flex:1 1 100%}
  .picker>div:nth-child(2){flex:1 1 auto}
  .picker #sevFilter{width:100%}
  #refreshBtn{align-self:flex-end;min-height:40px;min-width:44px}
  .card-b{padding:12px}
  .card-h{padding:11px 12px}

  .map-holder svg{max-height:min(48vh,420px)}
  .map-tools button{width:38px;height:38px;font-size:17px}

  /* One scrolling row. `nowrap` is what stops the five-row stack; the padding-right
     leaves space for the fade so the last button is never half-hidden under it. */
  .layer-bar{flex-wrap:nowrap;overflow-x:auto;padding:9px 22px 9px 12px;
    scrollbar-width:none;-webkit-overflow-scrolling:touch;
    scroll-snap-type:x proximity;position:relative}
  .layer-bar::-webkit-scrollbar{display:none}
  .layer-btn{flex:0 0 auto;scroll-snap-align:start;min-height:36px;padding:6px 10px}
  .layer-bar-wrap::after{content:'';position:absolute;right:0;top:1px;bottom:0;width:24px;
    pointer-events:none;background:linear-gradient(to right,transparent,var(--surface))}

  .map-legend{gap:9px;font-size:11px}
  /* The popup is 290px wide by design; below ~320px of viewport it has to give. */
  .popup{max-width:min(290px,calc(100vw - 16px))}
  .corridor{gap:14px}
  .corridor b{font-size:19px}
}

/* Coarse pointers get the larger targets whatever the screen size — a tablet is
   not a narrow screen but a finger is still a finger. */
@media (pointer:coarse){
  .map-tools button{width:38px;height:38px}
  .layer-btn{min-height:36px}
}