:root {
  color-scheme: dark;
  --page-padding: 16px;
  --app-height: 100dvh;
  --viewport-offset-top: 0px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  min-height: 100%;
  overflow: hidden;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #111827;
  color: #e5e7eb;
}
body {
  min-height: var(--app-height);
}
.app {
  height: var(--app-height);
  max-height: var(--app-height);
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 16px;
  padding: var(--page-padding);
  overflow: hidden;
}
.card {
  background: #1f2937;
  border: 1px solid #374151;
  border-radius: 12px;
  padding: 16px;
}
.sidebar, .chat-panel {
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}
.toolbar, .send-row, .image-row, .chat-header {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.chat-header {
  justify-content: space-between;
}
.chat-header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}
.chat-heading {
  min-width: 0;
}
.chat-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}
.chat-subtitle {
  margin-top: 2px;
  font-size: 13px;
  color: #9ca3af;
  line-height: 1.4;
  word-break: break-word;
}
.chat-panel > .card {
  flex-shrink: 0;
}
.chat-panel > #messages {
  flex-shrink: 1;
}
.card-fill {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
.toolbar-spaced {
  margin-top: 12px;
}
.field-compact {
  max-width: 160px;
}
.sidebar-section-header {
  margin-bottom: 12px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: #d1d5db;
  flex: 1;
  min-width: 180px;
}
.field-label {
  display: inline-flex;
  align-items: center;
  min-height: 18px;
}
input, textarea, button {
  border-radius: 8px;
  border: 1px solid #4b5563;
  background: #111827;
  color: #f9fafb;
  padding: 10px 12px;
  font: inherit;
}
textarea {
  min-height: 80px;
  resize: vertical;
  width: 100%;
}
button {
  cursor: pointer;
  background: #2563eb;
  border-color: #2563eb;
}
button.secondary {
  background: #374151;
  border-color: #4b5563;
}
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
button,
input,
textarea {
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.sidebar-tab:focus-visible,
.conversation-item:focus-visible,
.friend-item:focus-visible,
.group-item:focus-visible,
.picker-item:focus-visible,
.emoticon-option:focus-visible {
  outline: none;
  border-color: #60a5fa;
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 35;
}
.sidebar-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}
.sidebar-mobile-header,
.mobile-nav-button {
  display: none;
}
.feedback-status {
  font-size: 14px;
  color: #93c5fd;
  margin-top: 12px;
  min-height: 20px;
}
.connection-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #334155;
  background: #111827;
  color: #cbd5e1;
  font-size: 12px;
  line-height: 1;
}
.connection-chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #f59e0b;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.12);
}
.connection-chip.is-connected .connection-chip-dot {
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.12);
}
.connection-chip.is-error .connection-chip-dot,
.connection-chip.is-disconnected .connection-chip-dot {
  background: #ef4444;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.12);
}
.connection-chip.is-connecting .connection-chip-dot {
  background: #f59e0b;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.12);
}
.empty-state {
  color: #9ca3af;
  text-align: center;
  margin: auto 0;
}