:root {
  --header-height: 60px;
  --panel-width: 300px;

  --surface-1: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --border-hairline: rgba(11, 11, 11, 0.10);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text-primary);
  display: flex; flex-direction: column;
}

#brand-header {
  flex-shrink: 0; z-index: 20; height: var(--header-height);
  background: var(--surface-1);
  border-bottom: 1px solid var(--border-hairline);
  box-shadow: 0 1px 6px rgba(11, 11, 11, 0.08);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px;
}
#brand-header .app-header__brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
#brand-logo-link { display: block; line-height: 0; flex-shrink: 0; }
#brand-logo-link img { height: 28px; width: auto; display: block; }

#brand-title {
  font-size: 18px; font-weight: 600; letter-spacing: 0.01em; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

@media (max-width: 640px) {
  :root { --panel-width: 240px; }
  #brand-header { padding: 0 12px; }
  #brand-logo-link img { height: 22px; }
  #brand-title { font-size: 15px; }
  #snapshot-label { display: none; }
  #snapshot-select { font-size: 12px; padding: 3px 6px; }
}

#body-content { position: relative; flex: 1 1 auto; min-height: 0; display: flex; }

#map-area { position: relative; flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }

#map { position: relative; flex: 1 1 auto; min-height: 0; }

#panel {
  position: relative; z-index: 12;
  flex: 0 0 var(--panel-width); width: var(--panel-width);
  overflow-y: auto; overflow-x: hidden;
  background: var(--surface-1);
  border-right: 1px solid var(--border-hairline);
  box-shadow: 1px 0 6px rgba(11, 11, 11, 0.06);
  padding: 20px;
  display: flex; flex-direction: column;
  transition: flex-basis .25s ease, width .25s ease, padding .25s ease;
}
#panel.collapsed {
  flex-basis: 0; width: 0; padding: 0; border-right: none; box-shadow: none;
}

#panel-toggle {
  position: absolute; top: 12px; left: -16px;
  width: 32px; height: 32px; border-radius: 0; padding: 0 0px 0 0;
  display: flex; align-items: center; justify-content: flex-end;
  background: var(--surface-1); color: var(--text-muted);
  border: 1px solid var(--border-hairline);
  box-shadow: 0 1px 4px rgba(11, 11, 11, 0.18);
  cursor: pointer; z-index: 15;
  transition: left .25s ease;
}
#panel-toggle:hover { left: 0; color: var(--text-primary); }
#panel-toggle svg { width: 16px; height: 16px; transition: transform .25s ease; }
#panel.collapsed ~ #panel-toggle svg { transform: rotate(180deg); }
.side-panel__section + .side-panel__section { margin-top: 28px; }
#panel .side-panel__section--bottom { margin-top: auto; }
.side-panel__heading, #legend h4 {
  font-size: 13px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .04em; margin-bottom: 10px;
}
.side-panel__text { font-size: 14px; line-height: 1.5; color: var(--text-secondary); }
.side-panel__text + .side-panel__text { margin-top: 8px; }
.side-panel__link { color: var(--text-secondary); text-decoration: underline; }
.side-panel__link:hover { color: var(--text-primary); }

.side-panel__footer { text-align: center; }
.side-panel__footer .side-panel__text { font-size: 12px; line-height: 1.2; }

#updated-at { font-size: 14px; color: var(--text-muted); margin-top: 16px; }

.leg { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-primary); margin-bottom: 10px; }
.swatch {
  width: 18px; height: 18px; border-radius: 50%; flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(11, 11, 11, 0.12);
}

#snapshot-selector {
  display: none; align-items: center; gap: 8px; flex-shrink: 0; min-width: 0;
}
#snapshot-selector.ready {
  display: flex;
}
#snapshot-label {
  font-size: 13px; color: var(--text-muted); white-space: nowrap; flex-shrink: 0;
}
#snapshot-select {
  font-size: 13px; font-family: inherit;
  border: 1px solid var(--border-hairline); border-radius: 6px;
  background: var(--surface-1); color: var(--text-primary);
  padding: 4px 8px; cursor: pointer; min-width: 0;
}

.maplibregl-popup-content { font-family: inherit; font-size: 15px; padding: 10px 12px; min-width: 260px; max-height: 380px; overflow-y: auto; }
.maplibregl-popup-close-button {
  top: 5px; right: 5px; width: 22px; height: 22px;
  font-size: 16px; line-height: 22px; border-radius: 50%; color: #888;
}
.maplibregl-popup-close-button:hover { background-color: #f0f0f0; color: #333; }
.pop-title { font-weight: 700; font-size: 16px; margin-bottom: 6px; color: #222; }
.pop-badge {
  display: inline-block; padding: 2px 9px; border-radius: 10px;
  color: #fff; font-size: 13px; font-weight: 700; margin-bottom: 7px;
}
.pop-row { display: flex; justify-content: space-between; align-items: flex-start;
           gap: 8px; margin-bottom: 3px; font-size: 15px; }
.pop-key { color: #888; flex-shrink: 0; }
.pop-row span:last-child { text-align: right; }
.pop-divider { border: none; border-top: 1px solid #e5e5e5; margin: 6px 0; }