:root {
  --bg: #f6f7f9;
  --border: #d8dee8;
  --danger: #b42318;
  --muted: #687386;
  --ok: #067647;
  --panel: #ffffff;
  --text: #172033;
  --warn: #b54708;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, sans-serif;
  font-size: 14px;
}

button,
input {
  font: inherit;
}

button {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
  padding: 8px 10px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

input {
  min-width: 220px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
}

pre {
  overflow: auto;
  margin: 8px 0 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #0f172a;
  color: #e5e7eb;
  padding: 12px;
  white-space: pre-wrap;
  word-break: break-word;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: #ffffff;
  padding: 16px 20px;
}

.topbar h1 {
  margin: 0;
  font-size: 20px;
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
}

.channel-form {
  display: flex;
  gap: 8px;
}

.layout {
  display: grid;
  grid-template-columns: 260px minmax(360px, 1fr) minmax(360px, 1fr);
  gap: 12px;
  padding: 12px;
}

.panel {
  min-height: calc(100vh - 96px);
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  overflow: hidden;
}

.panel-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding: 12px;
}

.panel-title h2 {
  margin: 0;
  font-size: 16px;
}

.actions {
  display: flex;
  gap: 8px;
}

.muted {
  color: var(--muted);
}

.channels,
.events,
.detail {
  padding: 12px;
}

.channel,
.event {
  display: block;
  width: 100%;
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #ffffff;
  padding: 10px;
  text-align: left;
}

.channel.active,
.event.active {
  border-color: #2f6fed;
  outline: 2px solid rgba(47, 111, 237, 0.15);
}

.row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: baseline;
}

.badge {
  display: inline-block;
  border-radius: 999px;
  background: #eef2ff;
  color: #3538cd;
  padding: 2px 8px;
  font-size: 12px;
}

.badge.ok {
  background: #ecfdf3;
  color: var(--ok);
}

.badge.warn {
  background: #fffaeb;
  color: var(--warn);
}

.badge.danger {
  background: #fef3f2;
  color: var(--danger);
}

.empty {
  color: var(--muted);
}

.detail-section {
  margin-bottom: 14px;
}

.detail-section h3 {
  margin: 0 0 6px;
  font-size: 14px;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: auto;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }
}