:root {
  color-scheme: dark;
  --color100: #161616;
  --color200: #262626;
  --color300: #393939;
  --color400: #525252;
  --color500: #6f6f6f;
  --color600: #8d8d8d;
  --color700: #a8a8a8;
  --color800: #c6c6c6;
  --color900: #e0e0e0;
  --color1000: #f4f4f4;
  --bg-canvas: var(--color100);
  --bg-shell: var(--color200);
  --bg-panel: var(--color200);
  --bg-panel-strong: var(--color300);
  --bg-panel-active: var(--color400);
  --border-color: var(--color400);
  --border-soft: var(--color300);
  --text-primary: var(--color1000);
  --text-muted: var(--color700);
  --text-soft: var(--color600);
  --accent: var(--color900);
  --accent-strong: var(--color1000);
  --success: #3dd598;
  --warning: var(--color800);
  --danger: var(--color700);
  --surface-panel: rgba(22, 22, 22, 0.92);
  --surface-panel-muted: rgba(38, 38, 38, 0.86);
  --surface-panel-hover: rgba(57, 57, 57, 0.92);
  --surface-shell: rgba(22, 22, 22, 0.7);
  --diff-line: rgba(61, 213, 152, 0.12);
  --diff-line-border: rgba(61, 213, 152, 0.42);
  --diff-char: rgba(255, 111, 125, 0.24);
  --diff-char-border: rgba(255, 111, 125, 0.42);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(244, 244, 244, 0.08), transparent 30%),
    radial-gradient(circle at top right, rgba(168, 168, 168, 0.09), transparent 24%),
    linear-gradient(180deg, var(--bg-canvas) 0%, var(--bg-shell) 100%);
  color: var(--text-primary);
  font-family: "Bahnschrift", "Segoe UI Variable", "Trebuchet MS", sans-serif;
}

button,
input,
textarea,
select {
  font: inherit;
}

.app-shell {
  max-width: 1680px;
  margin: 0 auto;
  padding: 24px;
}

.topbar,
.panel {
  background: var(--surface-panel);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.topbar {
  display: grid;
  grid-template-columns: minmax(320px, 390px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 24px 28px;
  margin-bottom: 18px;
}

.topbar-brand {
  grid-column: 1;
  align-self: center;
  color: var(--text-primary);
  font-size: clamp(1.4rem, 1.15rem + 0.9vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.topbar-side {
  grid-column: 2;
  min-width: 0;
}

.panel-kicker,
.panel-header h2 {
  margin: 0;
}

.panel-kicker {
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  color: var(--accent);
}

.panel-header h2 {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.status-card {
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
}

.status-label {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-soft);
  margin-bottom: 10px;
}

.status-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 16px;
  align-items: center;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border: 1px solid currentColor;
}

.status-pill.connected {
  color: var(--success);
}

.status-pill.reconnecting {
  color: var(--warning);
}

.status-pill.disconnected {
  color: var(--text-muted);
}

.status-pill.error {
  color: var(--danger);
}

.status-detail-stack {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.status-detail-line {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 6px;
  margin: 0;
  min-height: 1.5em;
  color: var(--text-muted);
  line-height: 1.5;
  word-break: break-word;
}

.status-detail-key {
  color: var(--text-primary);
  font-weight: 600;
}

.status-detail-value {
  min-width: 0;
  color: var(--text-muted);
}


.status-detail {
  margin: 0;
  min-width: 0;
  color: var(--text-muted);
  line-height: 1.5;
  word-break: break-word;
}


.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 390px) minmax(0, 1fr);
  gap: 18px;
  min-height: calc(100vh - 250px);
}

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

.sidebar,
.details {
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 20px 14px;
  border-bottom: 1px solid var(--border-soft);
  background: linear-gradient(180deg, rgba(57, 57, 57, 0.82), rgba(38, 38, 38, 0.88));
}

.ghost-button,
.primary-button {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  min-height: 40px;
  padding: 0 14px;
  color: var(--text-primary);
  cursor: pointer;
}

.ghost-button {
  background: var(--surface-shell);
}

.ghost-button.active {
  background: linear-gradient(180deg, rgba(82, 82, 82, 0.96), rgba(57, 57, 57, 0.96));
  border-color: rgba(198, 198, 198, 0.36);
}

.primary-button {
  background: linear-gradient(180deg, rgba(82, 82, 82, 0.96), rgba(57, 57, 57, 0.96));
}

.ghost-button:hover,
.primary-button:hover {
  border-color: var(--accent-strong);
}

.ghost-button:disabled,
.primary-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.message-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  overflow: auto;
}

.message-item {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  background: var(--surface-panel-muted);
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.message-item:hover,
.message-item.active {
  background: var(--surface-panel-hover);
  border-color: rgba(224, 224, 224, 0.24);
}

.message-topline {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.message-topic {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  font-weight: 700;
  line-height: 1.35;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.message-time {
  color: var(--text-soft);
  font-size: 0.82rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.message-meta {
  margin-top: 4px;
  color: var(--text-soft);
  font-size: 0.82rem;
}
.empty-state {
  padding: 22px;
  border: 1px dashed var(--border-color);
  border-radius: 16px;
  background: rgba(22, 22, 22, 0.65);
  color: var(--text-muted);
  line-height: 1.6;
}

.detail-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  column-gap: 16px;
  row-gap: 12px;
}

.detail-intro {
  flex: 1 1 auto;
  min-width: 0;
}

#detail-topic {
  font-size: clamp(1.04rem, 0.88rem + 0.64vw, 1.6rem);
  line-height: 1.22;
  overflow-wrap: anywhere;
}

.source-picker {
  width: min(440px, 100%);
  margin-bottom: 18px;
}

.sidebar-top {
  background: linear-gradient(180deg, rgba(57, 57, 57, 0.82), rgba(38, 38, 38, 0.88));
}

.sidebar-source {
  padding: 18px 20px 16px;
  border-bottom: 1px solid var(--border-soft);
  background: transparent;
}

.sidebar-source .source-picker {
  width: 100%;
  margin-bottom: 0;
}

.sidebar-top .panel-header {
  background: transparent;
}

.source-picker-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-soft);
}

.source-select-wrap {
  position: relative;
  width: 100%;
}

.source-select-wrap::before {
  content: "";
  position: absolute;
  top: 9px;
  bottom: 9px;
  right: 44px;
  width: 1px;
  background: rgba(244, 244, 244, 0.14);
  pointer-events: none;
}

.source-select-wrap::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 18px;
  width: 10px;
  height: 10px;
  border-right: 2px solid rgba(244, 244, 244, 0.88);
  border-bottom: 2px solid rgba(244, 244, 244, 0.88);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}

.source-select {
  width: 100%;
  min-height: 48px;
  padding: 0 52px 0 16px;
  border: 1px solid rgba(111, 111, 111, 0.82);
  border-radius: 12px;
  color: var(--text-primary);
  background: linear-gradient(180deg, rgba(57, 57, 57, 0.96), rgba(38, 38, 38, 0.98));
  box-shadow: inset 0 1px 0 rgba(244, 244, 244, 0.04), 0 10px 24px rgba(0, 0, 0, 0.18);
  appearance: none;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.source-select:hover,
.source-select:focus {
  border-color: var(--accent-strong);
}

.source-select:focus {
  outline: 2px solid rgba(244, 244, 244, 0.18);
  outline-offset: 2px;
}

.source-select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.source-select option,
.source-select optgroup {
  color: var(--color100);
  background-color: var(--color1000);
}


.detail-meta {
  margin-top: 10px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.45;
  word-break: break-word;
}

.action-row {
  display: inline-flex;
  flex-wrap: nowrap;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
  justify-self: end;
  align-self: center;
}

.action-row .primary-button {
  min-height: 36px;
  padding: 0 12px;
  font-size: 0.92rem;
  white-space: nowrap;
}

.payload-wrap {
  flex: 1;
  min-height: 0;
  padding: 18px;
  overflow: hidden;
}

.payload-viewer {
  height: 100%;
  margin: 0;
  padding: 18px;
  overflow: auto;
  border-radius: 16px;
  border: 1px solid var(--border-soft);
  background:
    linear-gradient(180deg, rgba(22, 22, 22, 0.94), rgba(38, 38, 38, 0.92)),
    repeating-linear-gradient(
      180deg,
      rgba(244, 244, 244, 0.035) 0,
      rgba(244, 244, 244, 0.035) 1px,
      transparent 1px,
      transparent 28px
    );
  color: var(--text-primary);
  font-family: "Cascadia Code", "Consolas", "Courier New", monospace;
  font-size: 0.92rem;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}


.payload-line {
  display: block;
  min-height: 1.6em;
  margin: 0 -6px;
  padding: 0 6px;
  border-radius: 8px;
}

.payload-line.changed {
  background: linear-gradient(90deg, var(--diff-line), rgba(61, 213, 152, 0.03));
  box-shadow: inset 3px 0 0 var(--diff-line-border);
}

.payload-char.changed {
  display: inline-block;
  padding: 0 0.08em;
  margin: 0 -0.02em;
  border-radius: 5px;
  background: var(--diff-char);
  box-shadow: 0 0 0 1px var(--diff-char-border);
  color: var(--text-primary);
  animation: payload-char-pulse 1.05s ease;
}

.snapshot-panel {
  padding: 18px;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(22, 22, 22, 0.52);
}

.snapshot-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.snapshot-status {
  color: var(--text-soft);
}

.snapshot-stage {
  min-height: 140px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid var(--border-soft);
  background: rgba(22, 22, 22, 0.92);
}

.snapshot-stage img {
  max-width: 100%;
  max-height: 360px;
  border-radius: 12px;
  object-fit: contain;
}

.hidden {
  display: none !important;
}


@keyframes payload-char-pulse {
  0% {
    transform: scale(1);
    background: rgba(255, 111, 125, 0.42);
  }

  45% {
    transform: scale(1.03);
    background: rgba(255, 111, 125, 0.3);
  }

  100% {
    transform: scale(1);
    background: var(--diff-char);
  }
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr;
  }

  .topbar-brand {
    align-self: flex-start;
  }

  .topbar-side {
    grid-column: auto;
    width: 100%;
  }

  .status-card {
    width: 100%;
  }

  .workspace {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .sidebar {
    min-height: 320px;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 11px 12px;
  }

  .panel-header,
  .topbar,
  .payload-wrap,
  .snapshot-panel {
    padding-left: 14px;
    padding-right: 14px;
  }

  .status-row {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }

  .action-row {
    width: 100%;
    flex-wrap: wrap;
    justify-content: stretch;
  }

  .detail-header {
    display: flex;
    flex-wrap: wrap;
  }

  .action-row .primary-button {
    flex: 1 1 180px;
  }

  .snapshot-header {
    flex-direction: column;
    align-items: flex-start;
  }
}