:root {
  --text: #1a1a1a;
  --muted: #666666;
  --border: #d8d8d8;
  --link: #1a4fd6;
  --accent: #1a4fd6;
  --bg-input: #ffffff;
  --bg-page: #ffffff;
  --bg-output: #f7f7f7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

h1 {
  margin: 0 0 4px;
  font-size: 1.6em;
}

.subtitle {
  color: var(--muted);
  margin: 0 0 28px;
  font-size: 0.9em;
}

.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 2px solid var(--text);
}

.panel {
  padding: 16px 24px;
}

.panel:first-child {
  border-right: 1px solid var(--border);
}

.panel-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
  margin-bottom: 14px;
}

.panel h2 {
  margin: 0;
  font-size: 1.05em;
}

.panel h3 {
  margin: 20px 0 10px;
  font-size: 0.95em;
}

.quick-select {
  font-size: 0.9em;
}

.quick-label {
  font-weight: 600;
  margin-right: 4px;
}

.quick-select a {
  color: var(--link);
  text-decoration: none;
  cursor: pointer;
}

.quick-select a:hover {
  text-decoration: underline;
}

.quick-select .sep {
  color: var(--muted);
  margin: 0 4px;
}

select, input[type="text"] {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 0.95em;
}

.router-row {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.router-row select {
  flex: 1;
  min-width: 160px;
  border: none;
  background: transparent;
  padding: 9px 12px;
}

.router-row select:focus {
  outline: none;
}

.site-card {
  flex: 1;
  min-width: 180px;
  padding: 10px 12px;
}

.site-name {
  font-weight: 600;
  font-size: 0.95em;
}

.site-city {
  color: var(--muted);
  font-size: 0.82em;
  margin-top: 2px;
}

select:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.radio-list label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 0.95em;
  cursor: pointer;
}

.radio-list input[type="radio"] {
  margin: 0;
  accent-color: var(--accent);
}

.arg-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.arg-row label {
  white-space: nowrap;
  font-size: 0.9em;
  color: var(--muted);
}

.button-row {
  margin-top: 18px;
  display: flex;
  gap: 10px;
}

button {
  background: #eeeeee;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 8px 18px;
  cursor: pointer;
  font-size: 0.9em;
}

#probe-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  font-weight: 600;
}

button:hover { filter: brightness(0.97); }
#probe-btn:hover { filter: brightness(1.1); }

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.results {
  margin-top: 28px;
  border-top: 2px solid var(--text);
  padding-top: 14px;
}

.results h2 {
  margin: 0 0 10px;
  font-size: 1.05em;
}

#output {
  background: var(--bg-output);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px;
  min-height: 160px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85em;
  color: var(--text);
}

@media (max-width: 700px) {
  .panels { grid-template-columns: 1fr; }
  .panel:first-child { border-right: none; border-bottom: 1px solid var(--border); }
}