/* CityWater — minimal, water-themed styling. Plain CSS, no build step. */

:root {
  --water: #4a90c4;
  --water-dark: #2f6690;
  --ink: #1b2733;
  --muted: #5b6b78;
  --bg: #f4f9fc;
  --panel: #ffffff;
  --border: #d7e6f0;
  --danger: #b3261e;
  --danger-bg: #fdecea;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, #eaf3fa 100%);
  color: var(--ink);
  line-height: 1.45;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

.app-header {
  text-align: center;
  margin-bottom: 24px;
}

.app-header h1 {
  margin: 0 0 6px;
  font-size: 2rem;
  color: var(--water-dark);
}

.tagline {
  margin: 0 auto;
  max-width: 640px;
  color: var(--muted);
  font-size: 0.95rem;
}

.layout {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(20, 60, 90, 0.06);
  padding: 20px;
}

.form-panel {
  flex: 1 1 360px;
  min-width: 320px;
}

.result-panel {
  flex: 2 1 520px;
  min-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

fieldset.field-group {
  border: none;
  padding: 0;
  margin: 0 0 20px;
}

fieldset.field-group legend {
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--water-dark);
  padding: 0 0 8px;
}

.mode-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.radio-pill,
.checkbox-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.88rem;
  cursor: pointer;
  background: #fafdff;
  user-select: none;
}

.radio-pill:has(input:checked),
.checkbox-pill:has(input:checked) {
  background: var(--water);
  color: #fff;
  border-color: var(--water-dark);
}

.mode-fields {
  margin-bottom: 4px;
}

.field-label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.field-label input[type="text"],
.field-label input[type="number"] {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  color: var(--ink);
  background: #fff;
}

.field-label input[type="range"] {
  width: 100%;
  margin-top: 6px;
  accent-color: var(--water);
}

.hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0 0 8px;
}

.bbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.category-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.checkbox-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
}

.color-row {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.color-row input[type="color"] {
  display: block;
  margin-top: 4px;
  width: 48px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: none;
  cursor: pointer;
}

.primary-btn {
  width: 100%;
  padding: 11px 16px;
  background: var(--water);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.primary-btn:hover {
  background: var(--water-dark);
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.secondary-btn {
  flex: 1;
  padding: 9px 14px;
  background: #fff;
  color: var(--water-dark);
  border: 1px solid var(--water);
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
}

.secondary-btn:hover:not(:disabled) {
  background: #eaf4fb;
}

.secondary-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.status-line {
  min-height: 1.2em;
  font-size: 0.88rem;
  color: var(--water-dark);
  margin: 12px 0 0;
}

.error-message {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid #f2c1bd;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 0.88rem;
  margin-top: 10px;
}

.feature-counts {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 10px;
  white-space: pre-line;
}

.result-canvas {
  min-height: 360px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  background:
    linear-gradient(45deg, #fafdff 25%, transparent 25%),
    linear-gradient(-45deg, #fafdff 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #fafdff 75%),
    linear-gradient(-45deg, transparent 75%, #fafdff 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #fff;
}

.result-canvas svg {
  max-width: 100%;
  height: auto;
  display: block;
}

.result-canvas .placeholder {
  color: var(--muted);
  font-size: 0.9rem;
}

.download-row {
  display: flex;
  gap: 10px;
}

.app-footer {
  text-align: center;
  margin-top: 32px;
  font-size: 0.8rem;
  color: var(--muted);
}

.app-footer a {
  color: var(--water-dark);
}

.app-footer .note {
  margin-top: 4px;
}

@media (max-width: 720px) {
  .bbox-grid {
    grid-template-columns: 1fr;
  }
}