:root {
  --color-background: #f8f7f5;
  --color-surface: #ffffff;
  --color-border: #e7e3de;
  --color-text: #2b2f36;
  --color-muted: #6b7280;
  --color-brand: #5c6b8a;
  --color-brand-tint: #f0f2f7;
  --color-warning: #c28a2c;
  --color-danger: #b04a3a;
  color-scheme: light;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: var(--color-text);
  background: var(--color-background);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(43, 47, 54, 0.012) 0,
      rgba(43, 47, 54, 0.012) 1px,
      transparent 1px,
      transparent 4px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(43, 47, 54, 0.008) 0,
      rgba(43, 47, 54, 0.008) 1px,
      transparent 1px,
      transparent 7px
    ),
    var(--color-background);
}

button,
textarea {
  font: inherit;
}

.shell {
  display: grid;
  grid-template-columns: 210px minmax(0, 880px);
  width: min(1090px, calc(100% - 32px));
  margin: 40px auto;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: var(--color-surface);
  box-shadow: 0 12px 32px rgba(43, 47, 54, 0.06);
}

.sidebar {
  padding: 27px 20px;
  border-right: 1px solid var(--color-border);
  background: #fbfaf9;
}

.sidebar-brand {
  margin: 0 0 34px;
  color: var(--color-text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
}

.sidebar-group + .sidebar-group {
  margin-top: 26px;
}

.sidebar-label {
  margin: 0 0 8px;
  color: var(--color-muted);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.sidebar-value,
.sidebar-thread {
  margin: 0;
  color: var(--color-text);
  font-size: 0.84rem;
  line-height: 1.4;
}

.sidebar-thread {
  padding: 8px 10px;
  border-left: 2px solid var(--color-brand);
  border-radius: 0 7px 7px 0;
  background: var(--color-brand-tint);
  color: var(--color-brand);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 700;
}

.thread-pane {
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 32px 24px;
  border-bottom: 1px solid var(--color-border);
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--color-brand);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--color-text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 5vw, 3.15rem);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.workspace-badge {
  display: grid;
  gap: 3px;
  min-width: 150px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-brand-tint);
}

.workspace-badge span,
.status-row {
  color: var(--color-muted);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.workspace-badge strong {
  color: var(--color-brand);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86rem;
}

.status-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 32px;
  border-bottom: 1px solid var(--color-border);
  background: #fbfaf9;
}

.status-dot::before {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 999px;
  background: #9ca3af;
  content: "";
}

.status-dot.ready::before {
  background: var(--color-brand);
}

.thread {
  min-height: 330px;
  max-height: 58vh;
  overflow-y: auto;
  padding: 10px 32px 26px;
}

.entry {
  padding: 22px 0;
  border-bottom: 1px solid var(--color-border);
}

.entry:last-child {
  border-bottom: 0;
}

.entry-meta {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin-bottom: 8px;
}

.actor-type {
  padding: 3px 7px;
  border-radius: 5px;
  border-left: 2px solid var(--color-brand);
  background: var(--color-brand-tint);
  color: var(--color-brand);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.entry[data-actor-type="agent"] .actor-type {
  border-left-color: #766b8f;
  background: #f3f1f7;
  color: #665b7e;
}

.display-name {
  color: var(--color-text);
  font-weight: 700;
}

.timestamp {
  margin-left: auto;
  color: var(--color-muted);
  font-size: 0.77rem;
}

.entry-content {
  margin: 0;
  color: var(--color-text);
  line-height: 1.65;
  white-space: pre-wrap;
}

.empty-thread {
  display: grid;
  place-content: center;
  min-height: 300px;
  color: var(--color-muted);
  text-align: center;
}

.empty-thread p {
  margin: 0 0 6px;
  color: var(--color-text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
}

.composer {
  padding: 24px 32px 28px;
  border-top: 1px solid var(--color-border);
  background: #fbfaf9;
}

label {
  display: block;
  margin-bottom: 8px;
  color: var(--color-text);
  font-size: 0.82rem;
  font-weight: 750;
}

textarea {
  display: block;
  width: 100%;
  min-height: 104px;
  resize: vertical;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 13px 14px;
  outline: 0;
  background: #fff;
  color: var(--color-text);
  line-height: 1.5;
}

textarea:focus {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px rgba(92, 107, 138, 0.12);
}

.actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 13px;
}

button {
  min-height: 42px;
  border: 1px solid var(--color-brand);
  border-radius: 10px;
  padding: 0 18px;
  cursor: pointer;
  background: var(--color-brand);
  color: #fff;
  font-weight: 750;
}

button.secondary {
  border-color: var(--color-border);
  background: var(--color-surface);
  color: var(--color-brand);
}

button:hover:not(:disabled) {
  filter: brightness(0.96);
}

button:focus-visible {
  outline: 3px solid rgba(92, 107, 138, 0.18);
  outline-offset: 2px;
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.error {
  min-height: 1.25em;
  margin: 8px 0 0;
  color: var(--color-danger);
  font-size: 0.82rem;
}

@media (max-width: 760px) {
  .shell {
    grid-template-columns: 1fr;
    width: 100%;
    min-height: 100vh;
    margin: 0;
    border: 0;
    border-radius: 0;
  }

  .sidebar {
    display: grid;
    grid-template-columns: minmax(150px, 1fr) minmax(150px, 1fr);
    gap: 16px 24px;
    padding: 18px 20px;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .sidebar-brand {
    grid-column: 1 / -1;
    margin: 0;
  }

  .sidebar-group + .sidebar-group {
    margin-top: 0;
  }
}

@media (max-width: 620px) {
  .sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar-brand {
    grid-column: auto;
  }

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

  .workspace-badge {
    width: 100%;
  }

  .topbar,
  .thread,
  .composer {
    padding-left: 20px;
    padding-right: 20px;
  }

  .status-row {
    align-items: flex-start;
    flex-direction: column;
    padding-left: 20px;
    padding-right: 20px;
  }

  .entry-meta {
    flex-wrap: wrap;
  }

  .timestamp {
    width: 100%;
    margin-left: 0;
  }

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