:root{
  --bg:#05080f;
  --panel:rgba(16,22,34,.88);
  --panel-solid:#111726;
  --stroke:rgba(255,255,255,.14);
  --text:#e9eef7;
  --muted:#9aa8bf;
  --accent:#6fd3ff;
  --accent-dim:rgba(111,211,255,.16);
  --good:#57d98b;
  --bad:#ff7a7a;
  --safe-b:env(safe-area-inset-bottom,0px);
  --safe-t:env(safe-area-inset-top,0px);
  --safe-l:env(safe-area-inset-left,0px);
  --safe-r:env(safe-area-inset-right,0px);
}

*{box-sizing:border-box}
/* .hint sets display:flex, which otherwise wins over the hidden attribute
   and leaves an empty panel floating over the toolbar */
[hidden]{display:none !important}
html,body{height:100%;margin:0;overscroll-behavior:none}
body{
  background:var(--bg);
  color:var(--text);
  font:15px/1.35 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  user-select:none;-webkit-user-select:none;
  overflow:hidden;
}
#map{position:fixed;inset:0;touch-action:none}
.maplibregl-ctrl-attrib{font-size:10px}
.maplibregl-ctrl-bottom-right{margin-bottom:calc(var(--safe-b) + 76px)}
.maplibregl-ctrl-attrib.maplibregl-compact{background:rgba(0,0,0,.5)}
.maplibregl-ctrl-attrib a{color:var(--muted)}

/* ---------- boot ---------- */
.boot{position:fixed;inset:0;display:grid;place-items:center;background:var(--bg);z-index:50;transition:opacity .35s}
.boot.gone{opacity:0;pointer-events:none}
.boot-inner{text-align:center;color:var(--muted)}
.boot-fail{max-width:320px;padding:0 24px;line-height:1.5}
.boot-fail b{color:var(--text)}
.boot-fail a{color:var(--accent)}
.spinner{width:34px;height:34px;margin:0 auto 14px;border:2px solid rgba(255,255,255,.14);border-top-color:var(--accent);border-radius:50%;animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- shared chrome ---------- */
.pill{
  appearance:none;border:1px solid var(--stroke);background:var(--panel);color:var(--text);
  border-radius:999px;padding:9px 15px;font-size:14px;font-weight:600;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  min-height:40px;cursor:pointer;
}
.pill.icon{padding:9px 13px;font-size:17px;line-height:1}
.pill[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#04202c}
.pill.solid{background:var(--accent);border-color:var(--accent);color:#04202c}

.topbar{
  position:fixed;z-index:20;display:flex;gap:8px;
  top:calc(var(--safe-t) + 12px);left:calc(var(--safe-l) + 12px);
}

/* ---------- bottom toolbar ---------- */
.toolbar{
  position:fixed;z-index:20;left:calc(var(--safe-l) + 10px);right:calc(var(--safe-r) + 10px);
  bottom:calc(var(--safe-b) + 10px);
  display:grid;grid-template-columns:repeat(4,1fr);gap:6px;
  background:var(--panel);border:1px solid var(--stroke);border-radius:18px;padding:6px;
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 8px 30px rgba(0,0,0,.45);
}
.toggle{
  appearance:none;border:0;background:transparent;color:var(--muted);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  min-height:56px;border-radius:13px;padding:6px 2px;cursor:pointer;
  transition:background .15s,color .15s;
}
.toggle .glyph{display:block;width:22px;height:22px}
.toggle svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.toggle .lbl{font-size:11px;font-weight:600;letter-spacing:.01em}
.toggle[aria-pressed="true"]{background:var(--accent-dim);color:var(--accent)}
.toggle:active{transform:scale(.96)}

/* ---------- info card ---------- */
.info{
  position:fixed;z-index:20;left:calc(var(--safe-l) + 10px);right:calc(var(--safe-r) + 10px);
  bottom:calc(var(--safe-b) + 84px);
  background:var(--panel);border:1px solid var(--stroke);border-radius:16px;
  padding:13px 42px 14px 15px;
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 8px 30px rgba(0,0,0,.45);
  animation:rise .18s ease-out;
}
@keyframes rise{from{transform:translateY(8px);opacity:0}to{transform:none;opacity:1}}
.info-title{font-size:19px;font-weight:700;letter-spacing:-.01em}
.info-sub{font-size:13px;color:var(--accent);margin-top:2px}
.info-meta{font-size:12px;color:var(--muted);margin-top:5px}
.info-close{
  position:absolute;top:8px;right:8px;width:30px;height:30px;border-radius:50%;
  border:0;background:rgba(255,255,255,.08);color:var(--muted);font-size:19px;line-height:1;cursor:pointer;
}

/* ---------- quiz ---------- */
.quiz{
  position:fixed;z-index:20;left:calc(var(--safe-l) + 10px);right:calc(var(--safe-r) + 10px);
  top:calc(var(--safe-t) + 62px);
  background:var(--panel);border:1px solid var(--stroke);border-radius:16px;padding:11px 14px;
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 8px 30px rgba(0,0,0,.45);
}
.quiz-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.quiz-label{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);display:block}
.quiz-prompt strong{font-size:20px;font-weight:700;letter-spacing:-.01em}
.quiz-score{text-align:right;line-height:1.1}
.quiz-score span{font-size:20px;font-weight:700;color:var(--accent)}
.quiz-score small{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.quiz-sub{margin-top:7px;font-size:12.5px;color:var(--muted)}
.quiz-sub.right #quiz-feedback{color:var(--good)}
.quiz-sub.wrong #quiz-feedback{color:var(--bad)}

/* ---------- hint ---------- */
.hint{
  position:fixed;z-index:30;left:calc(var(--safe-l) + 14px);right:calc(var(--safe-r) + 14px);
  bottom:calc(var(--safe-b) + 84px);
  background:var(--panel-solid);border:1px solid var(--stroke);border-radius:16px;padding:14px;
  display:flex;align-items:center;gap:12px;box-shadow:0 8px 30px rgba(0,0,0,.55);
}
.hint p{margin:0;font-size:13px;color:var(--muted);flex:1}
.hint b{color:var(--text)}

@media (min-width:620px){
  .toolbar{left:50%;right:auto;transform:translateX(-50%);width:440px}
  .info,.quiz,.hint{left:50%;right:auto;transform:translateX(-50%);width:440px}
}