/* ══ Layout: Navigation, Sessions, Model Dropdown, Page Grid ══ */

/* ── Navigation ── */

.nav-panel {
  border-right: 1px solid var(--border);
  background: var(--surface);
  flex-direction: column;
  flex-shrink: 0;
  width: 270px;
  display: flex;
}

.nav-panel.hidden { display: none; }

.nav-link {
  color: var(--muted);
  padding: 8px 16px;
  font-size: 0.85rem;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.nav-link.active {
  color: var(--accent);
  background: var(--accent-subtle);
}

.nav-count { display: none; }
.nav-count.visible { display: inline-block; }

/* ── Burger button ── */

.burger-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
}

.burger-btn:hover {
  color: var(--text);
  background: var(--bg-hover);
}

/* ── Header actions ── */

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

.header-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface2);
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.header-link-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--bg-hover);
}

.header-link-btn.active {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  background: var(--accent-subtle);
}

.header-link-btn .icon {
  width: 14px;
  height: 14px;
}

.header-badge {
  display: inline-block;
  font-size: 0.65rem;
  line-height: 1;
  min-width: 16px;
  padding: 1px 5px;
  border-radius: 10px;
  background: var(--border);
  color: var(--muted);
  font-weight: 500;
  text-align: center;
}

.header-badge:empty {
  display: none;
}

/* ── Model Dropdown ── */

/* Toolbar needs a stacking context so dropdowns render above the messages grid row. */
.chat-toolbar {
  position: relative;
  z-index: 30;
  min-width: 0;
  max-width: 100%;
}

.chat-toolbar > * {
  min-width: 0;
}

.chat-toolbar #sessionNameMount {
  flex: 1 1 auto;
}

.chat-toolbar #sessionHeaderToolbarMount,
.chat-toolbar #sessionActionsMount {
  flex: 0 0 auto;
}

@media (max-width: 1100px) {
  .chat-toolbar .chat-badge-desktop-only {
    display: none !important;
  }
}

.model-combo { position: relative; }
.model-combo.hidden { display: none; }

.model-combo-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-body);
  cursor: pointer;
  white-space: nowrap;
  text-overflow: ellipsis;
  align-items: center;
  gap: 4px;
  max-width: 220px;
  padding: 4px 8px;
  transition: border-color 0.15s, color 0.15s;
  display: flex;
  overflow: hidden;
}

.model-combo-btn:hover,
.model-combo-btn:focus {
  border-color: var(--border-strong);
  color: var(--text);
  outline: none;
}

.model-combo-chevron {
  opacity: 0.6;
  flex-shrink: 0;
}

.model-dropdown {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 280px;
  box-shadow: var(--shadow-md);
  z-index: 40;
  flex-direction: column;
  animation: 0.1s ease-out msg-in;
  display: flex;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
}
.model-dropdown.align-right {
  left: auto;
  right: 0;
}

.model-dropdown.hidden { display: none; }

#reasoningCombo .model-combo-btn {
  max-width: none;
  width: auto;
  justify-content: flex-start;
}
#reasoningCombo .model-dropdown {
  width: auto;
  min-width: 100px;
}

.model-search-input {
  background: var(--surface2);
  border: none;
  border-bottom: 1px solid var(--border);
  width: 100%;
  color: var(--text);
  font-size: 0.78rem;
  font-family: var(--font-body);
  outline: none;
  padding: 8px 10px;
}

.model-search-input::placeholder { color: var(--muted); }

.model-dropdown-list {
  max-height: 240px;
  padding: 4px 0;
  overflow-y: auto;
}

.model-dropdown-item {
  cursor: pointer;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  transition: background 0.1s;
  display: flex;
}

.model-dropdown-item:hover,
.model-dropdown-item.kb-active {
  background: var(--bg-hover);
}

.model-dropdown-item.selected { color: var(--accent); }

.model-dropdown-item-unsupported .model-item-label {
  opacity: 0.72;
  text-decoration: line-through;
  text-decoration-color: var(--warn);
}

.model-item-label {
  white-space: nowrap;
  text-overflow: ellipsis;
  min-width: 0;
  font-size: 0.78rem;
  overflow: hidden;
}

.model-item-provider {
  color: var(--muted);
  font-size: 0.68rem;
}

.model-item-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
  flex-shrink: 0;
}

.model-item-unsupported {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.42);
  color: var(--warn);
  border-radius: 9999px;
  padding: 1px 6px;
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.model-dropdown-divider {
  height: 1px;
  margin: 4px 10px;
  background: var(--border);
}

.model-dropdown-empty {
  color: var(--muted);
  padding: 8px 10px;
  font-size: 0.78rem;
}

/* ── Sessions ── */

.session-item {
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  transition: background 0.15s;
  display: flex;
  color: inherit;
  text-decoration: none;
}

.session-item:hover { background: var(--bg-hover); }

.session-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.session-item.active {
  background: var(--accent-subtle);
  border-left: 3px solid var(--accent);
}

.session-info {
  flex: 1;
  min-width: 0;
}

.session-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 0.82rem;
  min-width: 0;
}

.session-label [data-label-text] {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.session-meta {
  color: var(--muted);
  margin-top: 2px;
  font-size: 0.7rem;
}

.session-actions {
  opacity: 0;
  gap: 4px;
  transition: opacity 0.15s;
  display: flex;
}

.session-item:hover .session-actions { opacity: 1; }

.session-action-btn {
  color: var(--muted);
  cursor: pointer;
  background: 0 0;
  border: none;
  border-radius: 3px;
  padding: 2px 4px;
  font-size: 0.75rem;
  transition: color 0.15s, background 0.15s;
}

.session-action-btn:hover {
  color: var(--text);
  background: var(--surface2);
}

.session-delete:hover { color: var(--error); }

.session-icon {
  flex-shrink: 0;
  justify-content: center;
  align-items: center;
  width: 16px;
  height: 16px;
  display: inline-flex;
}

.session-spinner {
	color: var(--muted);
	-webkit-user-select: none;
	user-select: none;
	font-family: monospace;
	font-size: 0.85rem;
	line-height: 16px;
	display: none;
}
.session-spinner::before {
	content: "\280B";
}

@keyframes braille-spin {
	0%  { content: "\280B"; }
	10% { content: "\2819"; }
	20% { content: "\2839"; }
	30% { content: "\2838"; }
	40% { content: "\283C"; }
	50% { content: "\2834"; }
	60% { content: "\2826"; }
	70% { content: "\2827"; }
	80% { content: "\2807"; }
	90% { content: "\280F"; }
}

.session-item.replying .session-icon > svg,
.session-item.replying .session-icon > .icon,
.session-item.loading .session-icon > svg,
.session-item.loading .session-icon > .icon { display: none; }
.session-item.replying .session-spinner,
.session-item.loading .session-spinner { display: inline; }
.session-item.replying .session-spinner::before,
.session-item.loading .session-spinner::before {
	animation: braille-spin 0.8s steps(1) infinite;
}
.session-item.replying .session-spinner { color: var(--warn); }
.session-item.loading .session-spinner { color: var(--accent); }


/* ── Search ── */

.search-dropdown {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0 0 6px 6px;
  max-height: 260px;
  overflow-y: auto;
  z-index: 30;
  box-shadow: var(--shadow-md);
}

.search-hit {
  padding: 8px 10px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

.search-hit:hover,
.search-hit.active {
  background: var(--bg-hover);
}

.search-hit-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-hit-snippet {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-hit-role {
  font-size: 0.68rem;
  color: var(--muted);
  margin-top: 1px;
  opacity: 0.7;
}

.search-hit-empty {
  padding: 8px 10px;
  font-size: 0.78rem;
  color: var(--muted);
}