:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --bg: #f8fafc;
  --panel: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
}

header {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 5;
}

.title-row h1 {
  font-size: 15px;
  margin: 0;
  font-weight: 700;
}

.tab-info {
  margin-top: 4px;
  font-size: 11.5px;
  color: var(--text-muted);
  font-family: var(--mono);
  overflow-wrap: anywhere;
}

.toolbar {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 7px 12px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background .12s ease, border-color .12s ease;
}

.btn:hover { background: #f1f5f9; }

.btn.primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  flex: 1;
}

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

.btn.ghost { color: var(--text-muted); }

main {
  padding: 4px 0 20px;
}

.group {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}

.group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.group-header h2 {
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--text-muted);
  margin: 0;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.count {
  background: #eef2ff;
  color: var(--blue-dark);
  font-size: 11px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 999px;
  text-transform: none;
  letter-spacing: 0;
}

.copy-btn {
  border: none;
  background: transparent;
  color: var(--blue);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 5px;
}

.copy-btn:hover { background: #eef2ff; }

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}

.list li {
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 12px;
  border-bottom: 1px solid #f1f5f9;
  word-break: break-all;
}

.list li:last-child { border-bottom: none; }

.list li.empty {
  color: var(--text-muted);
  font-family: inherit;
  font-style: italic;
  text-align: center;
  padding: 14px 10px;
}

.toast {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: #0f172a;
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease;
  box-shadow: 0 6px 18px rgba(0,0,0,.2);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}