.main.mqtt-main {
  grid-template-columns: 380px minmax(0, 1fr);
  align-items: stretch;
}

.mqtt-main .panel {
  min-width: 0;
}

.connection-panel,
.subscribe-panel,
.publish-panel,
.log-panel {
  display: flex;
  flex-direction: column;
}

.connection-panel .result-body,
.publish-panel .result-body,
.subscribe-panel .result-body {
  flex: 1;
  min-height: 0;
}

.connection-panel {
  grid-column: 1;
  grid-row: 1;
}

.publish-panel {
  grid-column: 2;
  grid-row: 1;
}

.subscribe-panel {
  grid-column: 1;
  grid-row: 2;
}

.log-panel {
  grid-column: 2;
  grid-row: 2;
  height: 540px;
}

.mqtt-main .extra-panel {
  grid-column: 1 / -1;
  grid-row: 3;
}

.intro-panel {
  margin-bottom: 15px;
}

.intro-text {
  font-size: 13px;
  line-height: 1.8;
  color: #4b5563;
}

.form-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-row {
  align-items: flex-start;
}

.form-row .form-group {
  flex: 1;
  min-width: 0;
}

.form-row .checkbox-group {
  flex: 0 0 auto;
  padding-top: 25px;
}

.form-row .align-end {
  flex: 0 0 auto;
  justify-content: flex-end;
  padding-top: 25px;
}

#pubForm .form-row {
  align-items: flex-end;
  padding: 10px 12px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

#pubForm .form-row .checkbox-group {
  padding: 0 4px 10px 0;
}

#pubForm .form-row .align-end {
  padding: 0;
}

#pubForm .form-row .align-end .btn {
  white-space: nowrap;
}

.checkbox-group {
  flex-direction: row;
  align-items: center;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: #374151;
  white-space: nowrap;
}

.input-with-btn {
  display: flex;
  gap: 8px;
}

.input-with-btn .form-control {
  flex: 1;
  min-width: 0;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 12px;
  white-space: nowrap;
}

.calc-btn {
  width: 100%;
  margin-top: 2px;
}

textarea.form-control {
  min-height: 104px;
  resize: vertical;
  line-height: 1.6;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.field-hint {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: #9ca3af;
}

.security-hint {
  margin: 12px 0 0;
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.6;
  color: #92400e;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 6px;
}

.conn-chip {
  font-size: 12px;
  color: #6b7280;
  background: #f9fafb;
  border: 1px solid #d1d5db;
  border-radius: 999px;
  padding: 2px 10px;
  white-space: nowrap;
}

.conn-chip.connected {
  color: #15803d;
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.conn-chip.connecting {
  color: #b45309;
  background: #fffbeb;
  border-color: #fde68a;
}

.conn-chip.error {
  color: #b91c1c;
  background: #fef2f2;
  border-color: #fecaca;
}

.count-chip {
  font-size: 12px;
  color: #4338ca;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  border-radius: 999px;
  padding: 2px 8px;
  white-space: nowrap;
}

.sub-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  flex: 1;
  min-height: 120px;
  overflow-y: auto;
}

.sub-empty {
  padding: 22px 10px;
  font-size: 12px;
  color: #9ca3af;
  text-align: center;
  border: 1px dashed #e5e7eb;
  border-radius: 6px;
}

.sub-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
}

.sub-topic {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: #374151;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sub-qos {
  font-size: 11px;
  color: #4338ca;
  background: #eef2ff;
  border-radius: 999px;
  padding: 1px 6px;
  white-space: nowrap;
}

.sub-remove {
  border: none;
  background: none;
  color: #dc2626;
  font-size: 12px;
  cursor: pointer;
  padding: 2px 4px;
}

.sub-remove:hover {
  text-decoration: underline;
}

.log-panel .result-body {
  flex: 1;
  min-height: 0;
  padding: 0;
}

.log-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.log-actions .btn {
  padding: 4px 8px;
  font-size: 12px;
}

.mini-check {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: #6b7280;
  white-space: nowrap;
  cursor: pointer;
}

.message-list {
  height: 100%;
  overflow-y: auto;
  padding: 10px 12px;
  background: #ffffff;
}

.message-list .empty-state {
  padding: 70px 20px;
}

.log-row {
  padding: 8px 0;
  border-bottom: 1px dashed #e5e7eb;
}

.log-row:last-child {
  border-bottom: none;
}

.msg-head {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.dir-badge {
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  padding: 1px 6px;
}

.dir-in {
  color: #15803d;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
}

.dir-out {
  color: #4338ca;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
}

.msg-topic {
  max-width: 55%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  color: #374151;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.msg-meta {
  font-size: 11px;
  color: #9ca3af;
}

.bin-badge {
  font-size: 10px;
  font-weight: 600;
  color: #92400e;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 3px;
  padding: 0 4px;
}

.msg-copy {
  margin-left: auto;
  border: none;
  background: none;
  color: #667eea;
  font-size: 11px;
  cursor: pointer;
  padding: 2px 4px;
}

.msg-copy:hover {
  text-decoration: underline;
}

.msg-payload {
  margin: 4px 0 0;
  padding: 8px;
  max-height: 180px;
  overflow: auto;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.6;
  color: #374151;
  white-space: pre-wrap;
  word-break: break-all;
}

.event-row {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 12px;
  color: #6b7280;
}

.event-row.error {
  color: #b91c1c;
}

.log-time {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  color: #9ca3af;
  white-space: nowrap;
}

.event-badge {
  font-size: 10px;
  color: #6b7280;
  background: #f3f4f6;
  border-radius: 3px;
  padding: 0 4px;
  white-space: nowrap;
}

.event-text {
  flex: 1;
  word-break: break-all;
}

.seo-article {
  font-size: 13px;
  line-height: 1.9;
  color: #4b5563;
}

.seo-article h2 {
  margin: 16px 0 8px;
  font-size: 15px;
  color: #333;
}

.seo-article h2:first-child {
  margin-top: 0;
}

.seo-article h3 {
  margin: 12px 0 6px;
  font-size: 14px;
  color: #374151;
}

.seo-article p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.9;
  color: #4b5563;
}

.seo-article ul,
.seo-article ol {
  margin: 0 0 12px;
  padding-left: 20px;
}

.seo-article li {
  margin-bottom: 6px;
}

.seo-article b {
  color: #333;
}

.seo-article code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: #4338ca;
  background: #f3f4f6;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  padding: 1px 5px;
  word-break: break-all;
}

.seo-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.seo-links a {
  font-size: 12px;
  color: #4338ca;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  border-radius: 999px;
  padding: 4px 10px;
  text-decoration: none;
  transition: background 0.2s;
}

.seo-links a:hover {
  background: #e0e7ff;
}

@media (max-width: 1100px) {
  .main.mqtt-main {
    grid-template-columns: 340px minmax(0, 1fr);
  }
}

@media (max-width: 900px) {
  .main.mqtt-main {
    grid-template-columns: 1fr;
  }

  .connection-panel,
  .publish-panel,
  .subscribe-panel,
  .log-panel,
  .mqtt-main .extra-panel {
    grid-column: 1;
    grid-row: auto;
  }

  .log-panel {
    height: 440px;
  }

  .sub-list {
    min-height: 90px;
  }
}

@media (max-width: 600px) {
  .form-row {
    flex-direction: column;
    gap: 12px;
  }

  .form-row .checkbox-group {
    padding-top: 0;
  }

  .form-row .align-end {
    width: 100%;
    justify-content: stretch;
    padding-top: 0;
  }

  .form-row .align-end .btn {
    width: 100%;
  }

  #pubForm .form-row {
    align-items: stretch;
  }

  #pubForm .form-row .checkbox-group {
    padding: 0;
  }

  #pubForm .form-row .align-end {
    width: 100%;
  }

  .log-actions {
    width: 100%;
  }

  .log-panel {
    height: 420px;
  }

  .msg-topic {
    max-width: 100%;
    white-space: normal;
    word-break: break-all;
  }

  .msg-copy {
    margin-left: 0;
  }
}