:root {
  --fg: #111;
  --bg: #fff;
  --muted: #888;
  --border: #e0e0e0;
  --accent: #000;
  --green: #2a7d4f;
  --yellow: #9a7b20;
  --error: #c00;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  min-height: 100vh;
  padding: 2.5rem 1.5rem;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 720px;
  margin: 0 auto;
}

/* --- Header --- */

header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

h1 {
  font-size: 0.75rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border);
}

.status-dot.ok {
  background: var(--green);
}

.status-dot.error {
  background: var(--error);
}

/* --- Stats bar --- */

.stats-bar {
  display: flex;
  gap: 2.5rem;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-label {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 300;
}

.stat-value.muted {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 400;
}

/* --- Provider cards --- */

.provider-card {
  border-left: 3px solid var(--border);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
}

.provider-card.available {
  border-left-color: var(--accent);
}

.provider-card.busy {
  border-left-color: var(--muted);
}

.provider-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.75rem;
}

.provider-agent-id {
  font-family: var(--mono);
  font-size: 0.8rem;
  word-break: break-all;
}

.copy-btn {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  margin-left: 0.5rem;
  flex-shrink: 0;
}

.copy-btn:hover {
  color: var(--fg);
  border-color: var(--fg);
}

.badge {
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--muted);
}

.badge.available {
  color: var(--green);
  border-color: var(--green);
}

.badge.busy {
  color: var(--yellow);
  border-color: var(--yellow);
}

/* --- Provider details --- */

.provider-details {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.8rem;
}

.detail {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.detail-label {
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.detail-value {
  font-family: var(--mono);
  font-size: 0.8rem;
}

/* --- Empty / Error --- */

.no-providers {
  text-align: center;
  color: var(--muted);
  padding: 3rem 1rem;
  font-size: 0.9rem;
}

.error-message {
  text-align: center;
  color: var(--error);
  padding: 2rem 1rem;
  font-size: 0.85rem;
}

/* --- Footer --- */

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.7rem;
  margin-top: 2rem;
  letter-spacing: 0.02em;
}

/* --- Responsive --- */

@media (max-width: 600px) {
  body { padding: 1.5rem 1rem; }
  .stats-bar { gap: 1.5rem; }
  .provider-details { flex-direction: column; gap: 0.75rem; }
}