:root {
  --bg: #f2f5f9;
  --panel: #ffffff;
  --ink: #14213d;
  --muted: #4f5d75;
  --accent: #1b998b;
  --warn: #f4a261;
  --danger: #d62828;
  --line: #d9e2ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 10%, #ffffff 0%, var(--bg) 55%);
}

.app-shell {
  width: min(980px, 100% - 2rem);
  margin: 1.25rem auto 2.5rem;
  display: grid;
  gap: 1rem;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 1rem;
}

.subtitle {
  margin-top: 0.25rem;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}

.status-stack {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.chip {
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.82rem;
}

.chip--ok {
  border-color: #2a9d8f;
  color: #1f7a70;
}

.chip--warn {
  border-color: var(--warn);
  color: #a76315;
}

.btn {
  border: 1px solid var(--line);
  background: white;
  color: var(--ink);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
}

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

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.btn--danger {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}

.btn--ghost {
  margin-top: 0.75rem;
}

.group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.5rem;
}

.group-grid .btn.is-active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.controls .control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.meta,
.hint {
  color: var(--muted);
  margin: 0.5rem 0;
}

.participants {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.participants li {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.badges {
  display: inline-flex;
  gap: 0.35rem;
}

.badge {
  font-size: 0.75rem;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.badge--active {
  border-color: var(--accent);
  color: #0f7a6e;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
  padding: 0;
}

@media (max-width: 700px) {
  .header {
    flex-direction: column;
  }
}