:root {
  --bg: #10131a;
  --panel-bg: #171b24;
  --border: #2a2f3a;
  --text: #e4e7ec;
  --text-dim: #8b93a3;
  --accent: #4d8dff;
  --success: #35c47a;
  --warning: #e6b450;
  --error: #f0556b;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-bg);
}

.app-header h1 {
  font-size: 16px;
  margin: 0;
  font-weight: 600;
}

.broker-label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-left: 8px;
}

.status-pill {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.status-connected { background: rgba(53, 196, 122, 0.15); color: var(--success); }
.status-connecting,
.status-reconnecting { background: rgba(230, 180, 80, 0.15); color: var(--warning); }
.status-disconnected,
.status-offline,
.status-error { background: rgba(240, 85, 107, 0.15); color: var(--error); }

.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 0;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}

.panel h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin: 0 0 10px;
}

.field-label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin: 8px 0 4px;
}

.field-label.inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.input-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

input[type='text'],
textarea,
select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 13px;
}

textarea {
  resize: vertical;
  width: 100%;
}

select {
  width: auto;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

button:hover {
  filter: brightness(1.1);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

#publish-btn {
  margin-top: 10px;
  width: 100%;
}

.publish-status {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  min-height: 16px;
}

.publish-status.success { color: var(--success); }
.publish-status.error { color: var(--error); }

.error-text {
  color: var(--error);
  font-size: 12px;
  min-height: 16px;
  margin-top: 6px;
}

.topic-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.topic-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-family: var(--mono);
  font-size: 12px;
}

.unsub-btn {
  background: transparent;
  color: var(--text-dim);
  padding: 0 6px;
  font-size: 14px;
  line-height: 1;
}

.unsub-btn:hover {
  color: var(--error);
}

.feed-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.feed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.feed-header h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin: 0;
}

.feed-header button {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

.message-feed {
  flex: 1;
  overflow-y: auto;
  padding: 12px 20px;
}

.message-entry {
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

.message-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.message-time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
}

.message-topic {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  word-break: break-all;
}

.message-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.03em;
}

.qos-badge {
  background: rgba(77, 141, 255, 0.15);
  color: var(--accent);
}

.retain-badge {
  background: rgba(230, 180, 80, 0.15);
  color: var(--warning);
}

.message-payload {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}