:root {
  /* Brand + map-marker colours (kept in sync with TYPE_COLOURS in app.js) */
  --blue: #2563eb;
  --lightblue: #60a5fa;
  --green: #16a34a;
  --amber: #f59e0b;
  --violet: #7c3aed;
  --red: #dc2626;
  --gray: #6b7280;

  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-ring: rgba(37, 99, 235, 0.25);

  /* Neutral scale */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  --border: var(--slate-200);
  --bg: var(--slate-50);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -8px rgba(15, 23, 42, 0.10);
  --shadow-float: 0 4px 16px -4px rgba(15, 23, 42, 0.18);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  font-family: var(--font-sans);
  margin: 0;
  background:
    radial-gradient(1200px 480px at 12% -10%, rgba(37, 99, 235, 0.07), transparent 60%),
    var(--bg);
  color: var(--slate-900);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------------------------------------------------------------------
   Header
   --------------------------------------------------------------------- */

header {
  position: sticky;
  top: 0;
  z-index: 1100;
  padding: 1rem 1.5rem;
  background: rgba(248, 250, 252, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--slate-200);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--violet));
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

header h1 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--slate-900);
}

.subtitle {
  margin: 0.15rem 0 0;
  color: var(--slate-500);
  font-size: 0.87rem;
}

/* ---------------------------------------------------------------------
   Layout
   --------------------------------------------------------------------- */

main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem 2.5rem;
  max-width: 1440px;
  margin: 0 auto;
}

.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.input-panel {
  grid-column: 1 / 2;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.1rem;
}

/* ---------------------------------------------------------------------
   Form controls
   --------------------------------------------------------------------- */

textarea {
  width: 100%;
  height: 220px;
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--slate-800);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.05rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
  background: var(--accent);
  color: white;
  font-family: inherit;
  font-size: 0.87rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  box-shadow: var(--shadow-sm);
}

button svg { flex-shrink: 0; }

button:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px -2px var(--accent-ring);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

button#download-btn,
button#download-xlsx-btn,
button#upload-btn,
button.secondary {
  background: white;
  color: var(--accent);
  border-color: var(--border);
}

button#download-btn:hover,
button#download-xlsx-btn:hover,
button#upload-btn:hover,
button.secondary:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent-dark);
}

#status,
#upload-status {
  font-size: 0.85rem;
  color: var(--slate-600);
}

/* ---------------------------------------------------------------------
   CSV upload panel
   --------------------------------------------------------------------- */

.upload-panel {
  margin-top: 0.1rem;
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--slate-50);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.upload-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.header-toggle {
  font-weight: normal;
  font-size: 0.8rem;
  color: var(--slate-600);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}

.upload-hint {
  margin: 0;
  font-size: 0.78rem;
  color: var(--slate-500);
}

.column-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.column-picker label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.32rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  background: white;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.column-picker label:hover {
  border-color: var(--accent);
}

.column-picker label.selected {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent-dark);
  font-weight: 600;
}

.upload-preview-wrap {
  max-height: 160px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: white;
}

#upload-preview-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.75rem;
}

#upload-preview-table th,
#upload-preview-table td {
  padding: 0.32rem 0.55rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  text-align: left;
}

#upload-preview-table th {
  background: var(--slate-100);
  color: var(--slate-600);
  font-weight: 600;
}

/* ---------------------------------------------------------------------
   Map panel + floating controls
   --------------------------------------------------------------------- */

.map-panel {
  grid-column: 2 / 3;
  grid-row: 1 / 3;
  position: relative;
  overflow: hidden;
  min-height: 500px;
}

#map {
  width: 100%;
  height: 100%;
  min-height: 500px;
}

.display-style-control,
.legend {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: var(--shadow-float);
  border-radius: var(--radius-sm);
}

.display-style-control {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 1000;
  padding: 0.55rem 0.75rem;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.display-style-row {
  display: flex;
  gap: 0.9rem;
}

.display-style-control label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  color: var(--slate-700);
}

input[type="radio"],
input[type="checkbox"] {
  accent-color: var(--accent);
}

.experimental-badge {
  display: inline-block;
  padding: 0.05rem 0.42rem;
  border-radius: 999px;
  background: #fef3c7;
  color: #92400e;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.region-size-row {
  border-top: 1px solid var(--slate-200);
  padding-top: 0.45rem;
  font-size: 0.78rem;
  color: var(--slate-600);
}

.region-size-row select {
  font-family: inherit;
  font-size: 0.78rem;
  padding: 0.2rem 1.5rem 0.2rem 0.4rem;
  border-radius: 6px;
  border: 1px solid var(--slate-300);
  background: white url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 0.35rem center / 12px 12px;
  appearance: none;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.region-size-row select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.legend {
  position: absolute;
  bottom: 12px;
  left: 12px;
  z-index: 1000;
  padding: 0.55rem 0.8rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--slate-700);
}

.legend .swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
}

/* ---------------------------------------------------------------------
   Results panel
   --------------------------------------------------------------------- */

.results-panel {
  grid-column: 1 / 2;
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: 460px;
  overflow: hidden;
}

.results-panel-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
  background: var(--slate-50);
}

.results-panel-header h2 {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--slate-800);
}

#results-row-count {
  font-size: 0.78rem;
  color: var(--slate-500);
  flex: 1;
}

.results-panel-header button {
  padding: 0.42rem 0.75rem;
  font-size: 0.78rem;
}

.results-table-wrap {
  overflow: auto;
  flex: 1;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.78rem;
}

th, td {
  padding: 0.45rem 0.65rem;
  text-align: left;
  border-bottom: 1px solid var(--slate-100);
  white-space: nowrap;
}

th {
  position: sticky;
  top: 0;
  background: var(--slate-100);
  color: var(--slate-600);
  font-weight: 600;
  z-index: 1;
}

tbody tr {
  transition: background 0.1s ease;
}

tbody tr:hover {
  background: var(--slate-50);
}

tr.error-row {
  background: rgba(220, 38, 38, 0.05);
}

tr.error-row:hover {
  background: rgba(220, 38, 38, 0.09);
}

.not-found {
  color: var(--red);
  font-style: italic;
  font-weight: 600;
}

.type-badge {
  display: inline-block;
  padding: 0.14rem 0.55rem;
  border-radius: 999px;
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ---------------------------------------------------------------------
   Scrollbars (WebKit/Chromium) — cosmetic only, degrades gracefully
   --------------------------------------------------------------------- */

.results-table-wrap::-webkit-scrollbar,
.upload-preview-wrap::-webkit-scrollbar,
textarea::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.results-table-wrap::-webkit-scrollbar-thumb,
.upload-preview-wrap::-webkit-scrollbar-thumb,
textarea::-webkit-scrollbar-thumb {
  background: var(--slate-300);
  border-radius: 999px;
}

.results-table-wrap::-webkit-scrollbar-track,
.upload-preview-wrap::-webkit-scrollbar-track,
textarea::-webkit-scrollbar-track {
  background: transparent;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
  }
  .input-panel, .map-panel, .results-panel {
    grid-column: 1 / 2;
  }
  .map-panel {
    grid-row: auto;
  }
  header {
    position: static;
  }
}