/* Swiss Slack demo (namespaced under body.demo-slack) */

.demo-slack .slack {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - 45px);
}

/* Sidebar: black panel, red accents */
.demo-slack .sidebar {
  background: var(--ink);
  color: var(--paper);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.demo-slack .sidebar-header .brand {
  font-size: 2rem;
  line-height: 0.95;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.demo-slack .sidebar-header .tagline {
  margin: 0.5rem 0 0;
  font-size: 0.7rem;
  color: #9a9a9a;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.demo-slack .sidebar section ul {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
}

.demo-slack .sidebar section li {
  padding: 0.2rem 0;
  font-size: 0.9rem;
}

.demo-slack .sidebar section li a {
  color: var(--paper);
  text-decoration: none;
}

.demo-slack .sidebar section li.active a {
  color: var(--red);
  font-weight: 700;
}

.demo-slack .sidebar section li a:hover { color: var(--red); }

.demo-slack .sidebar .roster li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #c9c9c9;
}

.demo-slack .sidebar .roster .dot {
  width: 7px;
  height: 7px;
  background: var(--red);
}

.demo-slack .sidebar-footer { margin-top: auto; }

.demo-slack .sidebar-footer button {
  width: 100%;
  background: transparent;
  color: var(--paper);
  border-color: var(--paper);
}

.demo-slack .sidebar-footer button:hover {
  background: var(--red);
  border-color: var(--red);
}

/* Conversation column: the message list scrolls, the chrome stays put —
   infinite scroll needs one stable scroll container to anchor against. */
.demo-slack .conversation {
  display: flex;
  flex-direction: column;
  padding: 1.5rem 2rem 2rem;
  max-width: 860px;
  height: calc(100vh - 45px);
}

.demo-slack .conversation-header {
  border-bottom: 2px solid var(--rule);
  padding-bottom: 0.75rem;
}

.demo-slack .conversation-header .hash { color: var(--red); }

.demo-slack .message-scroll {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
  /* prependHistory anchors the viewport manually (Safari has no native
     anchoring); leaving this on double-compensates when history pages are
     prefetched mid-scroll and throws the reader to the bottom. */
  overflow-anchor: none;
}

.demo-slack ol.messages {
  list-style: none;
  margin: 0;
  padding: 1rem 0;
}

/* The sentinel and the beginning marker are two states of the same slot at the
   top of the scrollback. The browser runtime renders has_more=true optimistically
   (its database holds only the synced window), so the first history probe always
   swaps one for the other — matching their boxes keeps that swap from shifting
   every message below it. */
.demo-slack .history-sentinel,
.demo-slack .beginning-marker {
  min-height: 2.75rem;
  padding: 0.6rem 0;
  text-align: center;
  border-bottom: 2px solid transparent;
}

.demo-slack .history-sentinel {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.demo-slack .history-sentinel[data-state="offline"] { color: var(--red); }

/* The slot's resolved state: scrollback is complete. Styled to match the
   server-rendered .beginning-marker, since either can hold the label. */
.demo-slack .history-sentinel[data-state="beginning"],
.demo-slack .beginning-marker {
  border-bottom-color: var(--rule);
}

.demo-slack ol.messages li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--hairline);
}

.demo-slack .message-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.demo-slack .message-head .author {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.demo-slack ol.messages li.own .message-head .author { color: var(--red); }

.demo-slack .message-head .timestamp {
  font-size: 0.7rem;
  color: var(--muted);
}

.demo-slack ol.messages .body {
  margin: 0.15rem 0 0;
  overflow-wrap: anywhere; /* long unbroken strings must not widen the page */
}

.demo-slack .composer {
  display: flex;
  gap: 0.5rem;
  border-top: 2px solid var(--rule);
  padding-top: 1rem;
}

.demo-slack .composer input[type="text"] { flex: 1; }

@media (max-width: 720px) {
  .demo-slack .slack { grid-template-columns: 1fr; }
  .demo-slack .sidebar { flex-direction: column; }
}