:root {
  --bg: #f4f4f4;
  --panel: #ffffff;
  --ink: #161616;
  --muted: #525252;
  --line: #e0e0e0;
  --blue: #0f62fe;
  --green: #198038;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--sans);
  color: var(--ink);
  background: linear-gradient(180deg, #e8e8e8 0%, var(--bg) 40%);
}

.top {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.25rem;
  min-height: 3rem;
  background: #0f3d8a;
  color: #f4f4f4;
}
.brand { color: inherit; text-decoration: none; font-weight: 600; }

.tabbar {
  width: min(96rem, calc(100% - 2rem));
  margin: 0.75rem auto 0;
  display: flex;
  gap: 0;
  border-bottom: 1px solid #8d8d8d;
  flex-shrink: 0;
}
.tab {
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.65rem 1rem 0.55rem;
}
.tab:hover { color: var(--ink); background: #e8e8e8; }
.tab.active {
  color: var(--blue);
  border-bottom-color: var(--blue);
}
.tab-view[hidden] { display: none !important; }

.split {
  width: min(96rem, calc(100% - 2rem));
  margin: 0.75rem auto 1rem;
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(18rem, 0.9fr);
  gap: 1rem;
  overflow: hidden;
}
.split.single {
  grid-template-columns: minmax(0, 1fr);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: 100%;
  overflow: hidden;
}
.panel-h {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  align-items: flex-start;
}
.panel-h h1 { margin: 0.15rem 0; font-size: 1.5rem; }
.sub { margin: 0; color: var(--muted); font-size: 0.875rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; justify-content: flex-end; }
.tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  background: #edf5ff;
  color: var(--blue);
}
.tag.live { background: #defbe6; color: var(--green); }
.ghost {
  border: 1px solid var(--line);
  background: #fff;
  font: inherit;
  font-size: 0.75rem;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

.log {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.bubble {
  max-width: 92%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  background: #fafafa;
  font-size: 0.9rem;
  line-height: 1.45;
}
.bubble.user {
  align-self: flex-end;
  background: #edf5ff;
  border-color: #a6c8ff;
}
.bubble .who {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.bubble .md-body > *:first-child { margin-top: 0; }
.bubble .md-body > *:last-child { margin-bottom: 0; }
.bubble .md-body p {
  margin: 0 0 0.55rem;
}
.bubble .md-body p:last-child { margin-bottom: 0; }
.bubble .md-body h1,
.bubble .md-body h2,
.bubble .md-body h3,
.bubble .md-body h4 {
  margin: 0.75rem 0 0.35rem;
  line-height: 1.25;
  font-weight: 600;
}
.bubble .md-body h1 { font-size: 1rem; }
.bubble .md-body h2 { font-size: 0.95rem; }
.bubble .md-body h3,
.bubble .md-body h4 { font-size: 0.9rem; }
.bubble .md-body h3.md-section {
  margin: 0.85rem 0 0.35rem;
  font-size: 0.875rem;
}
.bubble .md-body h1:first-child,
.bubble .md-body h2:first-child,
.bubble .md-body h3:first-child,
.bubble .md-body h4:first-child { margin-top: 0; }
.bubble .md-body ul,
.bubble .md-body ol {
  margin: 0 0 0.65rem 1.15rem;
  padding: 0;
}
.bubble .md-body li { margin: 0 0 0.35rem; }
.bubble .md-body li:last-child { margin-bottom: 0; }
.bubble .md-body strong { font-weight: 600; }
.bubble .md-body em { font-style: italic; }
.bubble .md-body del { text-decoration: line-through; color: var(--muted); }
.bubble .md-body a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.bubble .md-body code {
  padding: 0.08rem 0.25rem;
  font-family: var(--mono);
  font-size: 0.8em;
  background: #f4f4f4;
  border: 1px solid var(--line);
}
.bubble .md-body pre.md-code {
  margin: 0.5rem 0 0.75rem;
  padding: 0.65rem 0.75rem;
  overflow-x: auto;
  background: #f4f4f4;
  border: 1px solid var(--line);
  font-size: 0.8rem;
  line-height: 1.4;
}
.bubble .md-body pre.md-code code {
  padding: 0;
  border: 0;
  background: transparent;
  font-size: inherit;
}
.bubble .md-body blockquote {
  margin: 0.5rem 0 0.75rem;
  padding: 0.35rem 0 0.35rem 0.75rem;
  border-left: 3px solid #a6c8ff;
  color: var(--muted);
}
.bubble .md-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0.75rem 0;
}
.bubble .md-table-wrap {
  overflow-x: auto;
  margin: 0.5rem 0 0.75rem;
  border: 1px solid var(--line);
  background: #fafbfc;
}
.bubble .md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  line-height: 1.45;
}
.bubble .md-table th,
.bubble .md-table td {
  padding: 0.45rem 0.55rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.bubble .md-table th {
  background: #eef2f5;
  font-weight: 600;
}
.bubble .md-table tr:last-child td { border-bottom: 0; }
.empty { color: var(--muted); font-size: 0.875rem; margin: 0; }

.composer {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem 1rem;
  border-top: 1px solid var(--line);
}
.composer input {
  flex: 1;
  font: inherit;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line);
}
.composer button {
  font: inherit;
  padding: 0.55rem 1rem;
  background: var(--blue);
  color: #fff;
  border: none;
  cursor: pointer;
}
.setup {
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  line-height: 1.5;
  overflow-y: auto;
}
.setup code { font-family: var(--mono); font-size: 0.8em; word-break: break-all; }
.setup ul { margin: 0.25rem 0 1rem 1.25rem; padding: 0; }
.call-details p { margin: 0 0 1rem; }
.history-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 0.5rem;
}
.history-item {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.75rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.75rem;
  text-align: left;
}
.history-item:hover { background: #f4f4f4; }
.history-item.selected {
  background: #edf5ff;
  box-shadow: inset 3px 0 var(--blue);
}
.history-title { color: var(--ink); font-size: 0.875rem; font-weight: 600; }
.history-details {
  flex: 0 0 auto;
  border-bottom: 1px solid var(--line);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.history-log { padding-top: 0.75rem; }
.detail-grid {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 0.65rem 0.75rem;
  margin: 0;
}
.detail-grid dt {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
}
.detail-grid dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--mono);
  font-size: 0.75rem;
}
.bubble.loading { color: var(--muted); font-style: italic; }
.composer button:disabled,
.composer input:disabled,
.ghost:disabled { opacity: 0.55; cursor: not-allowed; }
.hint { color: var(--muted); font-size: 0.8rem; }

@media (max-width: 900px) {
  body { overflow: auto; }
  .split { grid-template-columns: 1fr; overflow: visible; flex: none; }
  .panel { min-height: 28rem; }
}