/* ─────────────────────────────────────────────────────────────────────────
   London Uncovered — base, shell layout, typography, primitives
   ───────────────────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/*
 * Author `display` declarations outrank the UA rule behind the `hidden`
 * attribute, so a hidden .btn (display:inline-flex) or .map-btn (display:grid)
 * would still paint. Everything toggled with `hidden` relies on this.
 */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.5;
  color: var(--ink);
  background: var(--ivory);
  height: 100dvh;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: var(--blue); }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}
/* Leaflet re-focuses the container on every interaction; a ring there is noise */
.leaflet-container:focus-visible { outline: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.serif { font-family: var(--font-serif); }

.eyebrow {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--ink-400);
}

/* ── Shell ─────────────────────────────────────────────────────────────── */

#app { position: fixed; inset: 0; }

#map {
  position: absolute; inset: 0;
  z-index: var(--z-map);
  isolation: isolate;            /* contain Leaflet's own stacking */
  background: #E8EAE6;
}

/* On mobile the shell is a pass-through overlay: children position themselves
   against the viewport. On desktop it becomes the right-hand panel. */
#shell { display: contents; }

/* ── Brand bar ─────────────────────────────────────────────────────────── */

#brandbar {
  position: fixed;
  top: calc(var(--safe-t) + var(--sp-3));
  left: calc(var(--safe-l) + var(--sp-3));
  right: calc(var(--safe-r) + var(--sp-3));
  z-index: var(--z-mapui);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  pointer-events: none;
}
#brandbar > * { pointer-events: auto; }

.brand {
  display: flex; align-items: center; gap: var(--sp-2);
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-radius: var(--r-pill);
  padding: 7px 13px 7px 9px;
  box-shadow: var(--sh-1);
  min-width: 0;
}
.brand-disc {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--blue);
  border: 2px solid rgba(255,255,255,.85);
  box-shadow: inset 0 0 0 1px rgba(12,52,104,.35);
  flex-shrink: 0;
}
.brand-name {
  font-size: var(--fs-sm);
  font-weight: 650;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--ink);
}

.counter {
  position: relative;
  margin-left: auto;
  flex-shrink: 0;
  display: flex; align-items: center; gap: 6px;
  min-height: 36px;
  padding: 0 13px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  box-shadow: var(--sh-1);
  font-size: var(--fs-sm);
  font-variant-numeric: tabular-nums;
  color: var(--ink-600);
  white-space: nowrap;
  transition: transform var(--dur-2) var(--ease-out);
}
.counter:hover { color: var(--ink); }
.counter strong { color: var(--blue); font-weight: 700; }
.counter-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--blue); flex-shrink: 0;
}
.counter.bump { animation: counter-bump var(--dur-3) var(--ease-out); }
@keyframes counter-bump {
  40% { transform: scale(1.09); }
  100% { transform: scale(1); }
}

/* The info control is secondary: keep it small so brand + count always fit */
#about-open { position: relative; width: 34px; height: 34px; flex-shrink: 0; }
#about-open svg { width: 17px; height: 17px; }

/*
 * The brand-bar pills are deliberately slim — a 44px-tall pill floating over
 * the map reads as heavy. The touch target is widened instead, so the pointer
 * area meets the 44px minimum without changing the visual weight.
 */
.counter::after,
#about-open::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  min-width: var(--tap);
  min-height: var(--tap);
  width: 100%;
  height: 100%;
}

@media (max-width: 359px) {
  #brandbar { gap: var(--sp-2); }
  .brand { padding: 6px 10px 6px 7px; }
  .brand-name { font-size: var(--fs-xs); }
  .counter { padding: 0 10px; font-size: var(--fs-xs); }
}

/* ── Buttons ───────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--sp-2);
  min-height: var(--tap);
  padding: 0 var(--sp-5);
  border-radius: var(--r-pill);
  font-size: var(--fs-base);
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: background var(--dur-1), color var(--dur-1),
              transform var(--dur-1) var(--ease-out), box-shadow var(--dur-1);
  white-space: nowrap;
}
.btn:active { transform: scale(.975); }
.btn[disabled] { opacity: .45; pointer-events: none; }
.btn, a.btn { text-decoration: none; }
/* Inline SVGs have no intrinsic size; without this they stretch to fill flex */
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn-sm svg { width: 15px; height: 15px; }

.btn-primary { background: var(--blue); color: #fff; box-shadow: var(--sh-1); }
.btn-primary:hover { background: var(--blue-800); }

.btn-secondary {
  background: var(--white);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--ink-200);
}
.btn-secondary:hover { background: var(--ivory-2); }

.btn-ghost { color: var(--blue); font-weight: 600; }
.btn-ghost:hover { background: var(--blue-050); }

.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-700); }

.btn-done {
  background: var(--blue-100);
  color: var(--blue-800);
  box-shadow: inset 0 0 0 1px var(--blue-200);
}

.btn-block { width: 100%; }
.btn-sm { min-height: 36px; padding: 0 var(--sp-4); font-size: var(--fs-sm); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: var(--tap); height: var(--tap);
  border-radius: 50%;
  color: var(--ink-600);
  transition: background var(--dur-1), color var(--dur-1);
}
.icon-btn:hover { background: var(--ink-100); color: var(--ink); }
.icon-btn svg { width: 20px; height: 20px; }

/* ── Progress bar ──────────────────────────────────────────────────────── */

/* Rendered as a <span> inside button-based cards, so the display is explicit */
.bar {
  display: block;
  height: 6px;
  border-radius: var(--r-pill);
  background: var(--ink-100);
  overflow: hidden;
}
.bar > i {
  display: block; height: 100%;
  border-radius: var(--r-pill);
  background: var(--blue);
  transition: width var(--dur-3) var(--ease-out);
}
.bar.gold > i { background: var(--gold); }

/* ── Boot / error overlay ──────────────────────────────────────────────── */

#boot {
  position: fixed; inset: 0;
  z-index: var(--z-boot);
  display: grid; place-items: center;
  background: var(--ivory);
  padding: var(--sp-6);
  transition: opacity var(--dur-3) var(--ease), visibility var(--dur-3);
}
#boot[hidden] { display: grid; opacity: 0; visibility: hidden; pointer-events: none; }

.boot-card { text-align: center; max-width: 320px; }
.boot-mark {
  width: 46px; height: 46px; border-radius: 50%;
  margin: 0 auto var(--sp-5);
  background: var(--blue);
  border: 3px solid rgba(255,255,255,.9);
  box-shadow: 0 0 0 1px var(--blue-200), var(--sh-2);
  animation: boot-pulse 1.6s var(--ease) infinite;
}
@keyframes boot-pulse {
  0%, 100% { transform: scale(1);    box-shadow: 0 0 0 1px var(--blue-200), var(--sh-2); }
  50%      { transform: scale(1.07); box-shadow: 0 0 0 10px rgba(20,86,160,.07), var(--sh-2); }
}
.boot-card h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-lg); font-weight: 600; letter-spacing: -0.01em;
  margin-bottom: var(--sp-2);
}
.boot-card p { font-size: var(--fs-sm); color: var(--ink-500); line-height: 1.6; }
.boot-card code {
  display: inline-block;
  background: var(--ivory-2); border-radius: 6px;
  padding: 2px 7px; margin: 3px 0;
  font-size: var(--fs-sm);
}
.boot-card .btn { margin-top: var(--sp-5); }

/* ── Static SEO content (crawlable, off-canvas until About opens) ──────── */

#about-content h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-md); font-weight: 600;
  margin: var(--sp-5) 0 var(--sp-2);
}
#about-content h2:first-child { margin-top: 0; }
#about-content p { font-size: var(--fs-sm); color: var(--ink-600); margin-bottom: var(--sp-3); }
#about-content strong { color: var(--ink); font-weight: 600; }

/* ── Desktop: shell becomes a fixed right-hand panel ───────────────────── */

@media (min-width: 900px) {
  #map { right: var(--panel-w); }

  #shell {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: var(--panel-w);
    background: var(--ivory);
    box-shadow: -1px 0 0 var(--ink-100), -12px 0 40px rgba(20,32,43,.06);
    z-index: var(--z-screen);
    padding-right: var(--safe-r);
  }

  #brandbar {
    position: static;
    padding: calc(var(--safe-t) + var(--sp-5)) var(--sp-5) var(--sp-4);
    background: var(--ivory);
    border-bottom: 1px solid var(--ink-100);
  }
  .brand, .counter { background: none; box-shadow: none; backdrop-filter: none; padding-left: 0; }
  .counter { padding-right: 0; }
  .brand-name { font-size: var(--fs-md); }
}