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

:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --border: #e5e5e0;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #1f6feb;
  --grade-A: #2f9e44;
  --grade-B: #f59f00;
  --grade-C: #e8590c;
  --grade-F: #c92a2a;
  --grade-unknown: #adb5bd;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --header-h: 56px;
}

html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

.app {
  display: grid;
  grid-template-columns: 320px 1fr 360px;
  grid-template-rows: var(--header-h) 1fr;
  grid-template-areas:
    "topbar topbar topbar"
    "sidebar map list";
  height: 100vh;
}

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 10;
}
.topbar .title h1 {
  font-size: 16px;
  margin: 0;
  font-weight: 600;
}
.topbar .subtitle {
  font-size: 12px;
  color: var(--muted);
}
.topbar .meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
}
.topbar button {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 13px;
  cursor: pointer;
}
.topbar button:hover { border-color: var(--accent); }

/* Sidebar */
.sidebar {
  grid-area: sidebar;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 16px;
  overflow-y: auto;
}
.filter-block { margin-bottom: 18px; }
.filter-block h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  margin: 0 0 8px 0;
  font-weight: 600;
}
.filter-block label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}
.filter-block input[type="search"],
.filter-block input[type="number"] {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
}
.filter-block input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(31, 111, 235, 0.15);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.chip {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.1s;
  user-select: none;
}
.chip:hover {
  border-color: var(--accent);
}
.chip.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.chips.small .chip { font-size: 11px; padding: 3px 9px; }

/* Per-grade tinting in active state */
.chip.grade-A.active { background: var(--grade-A); border-color: var(--grade-A); }
.chip.grade-B.active { background: var(--grade-B); border-color: var(--grade-B); }
.chip.grade-C.active { background: var(--grade-C); border-color: var(--grade-C); }
.chip.grade-Unknown.active {
  background: var(--grade-unknown);
  border-color: var(--grade-unknown);
  color: #1a1a1a;
}

.score-range {
  display: flex;
  gap: 8px;
}
.score-range label {
  display: block;
  flex: 1;
  font-size: 11px;
}
.score-range input { margin-top: 4px; }

.checkbox-row {
  display: flex !important;
  align-items: center;
  gap: 8px;
  font-size: 13px !important;
  font-weight: 400 !important;
  color: var(--text) !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
  margin-bottom: 6px;
  cursor: pointer;
}

.notes p {
  font-size: 12px;
  color: var(--muted);
  background: #fafaf7;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  line-height: 1.4;
  margin: 0;
}

.notes p + p {
  margin-top: 8px;
}

.notes .attribution a {
  color: inherit;
  text-decoration: underline;
}

/* Map */
.map-area {
  grid-area: map;
  position: relative;
}
#map {
  width: 100%;
  height: 100%;
  background: #d9d9d6;
}

/* Custom marker pins (CSS divs, lighter weight than SVG icons) */
.pin {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}
.pin.grade-A { background: var(--grade-A); }
.pin.grade-B { background: var(--grade-B); }
.pin.grade-C { background: var(--grade-C); }
.pin.grade-F { background: var(--grade-F); }
.pin.grade-Unknown { background: var(--grade-unknown); }

.popup-card {
  font-size: 13px;
  line-height: 1.45;
  min-width: 220px;
}
.popup-card .name {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}
.popup-card .meta-row {
  color: var(--muted);
  font-size: 12px;
}
.popup-card .grade-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
  color: #fff;
  margin-right: 6px;
  font-size: 12px;
}
.grade-badge.grade-A { background: var(--grade-A); }
.grade-badge.grade-B { background: var(--grade-B); }
.grade-badge.grade-C { background: var(--grade-C); }
.grade-badge.grade-F { background: var(--grade-F); }
.grade-badge.grade-Unknown { background: var(--grade-unknown); color: #1a1a1a; }
.popup-card .source-link {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--accent);
}

/* List panel */
.list-panel {
  grid-area: list;
  background: var(--panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
}
.list-header select {
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 6px;
  background: #fff;
}
#results-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1;
}
.result-item {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 10px;
  align-items: start;
}
.result-item:hover { background: #fafaf7; }
.result-item .grade-cell {
  font-weight: 700;
  font-size: 18px;
  text-align: center;
  border-radius: 6px;
  padding: 4px 0;
  color: #fff;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.result-item .grade-cell.grade-A { background: var(--grade-A); }
.result-item .grade-cell.grade-B { background: var(--grade-B); }
.result-item .grade-cell.grade-C { background: var(--grade-C); }
.result-item .grade-cell.grade-F { background: var(--grade-F); }
.result-item .grade-cell.grade-Unknown { background: var(--grade-unknown); color: #1a1a1a; }
.result-item .name { font-weight: 600; font-size: 13px; }
.result-item .meta-row {
  color: var(--muted);
  font-size: 11.5px;
  margin-top: 2px;
}
.result-item .badge {
  display: inline-block;
  font-size: 10.5px;
  background: #f1f1ec;
  color: var(--muted);
  border-radius: 3px;
  padding: 1px 5px;
  margin-right: 4px;
}
.result-item.ungeocoded .grade-cell {
  opacity: 0.7;
  font-size: 14px;
}

/* Mobile / narrow */
@media (max-width: 1100px) {
  .app {
    grid-template-columns: 280px 1fr;
    grid-template-areas:
      "topbar topbar"
      "sidebar map";
  }
  .list-panel { display: none; }
  .list-panel.visible {
    position: absolute;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    width: 360px;
    max-width: 90vw;
    display: flex;
    z-index: 5;
    box-shadow: -2px 0 6px rgba(0, 0, 0, 0.08);
  }
}

@media (max-width: 720px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "map";
  }
  .sidebar {
    position: absolute;
    top: var(--header-h);
    bottom: 0;
    left: 0;
    width: 280px;
    max-width: 85vw;
    z-index: 6;
    transform: translateX(-100%);
    transition: transform 0.2s;
  }
  .sidebar.visible { transform: translateX(0); }
}