.app {
  --chat-user-bg: #5a9b89;
  --chat-user-text: #f7fffb;
  --chat-assistant-bg: rgba(255, 255, 255, 0.92);
  --chat-assistant-text: var(--text);
  --chat-reasoning-bg: #f1e8dd;
  --chat-reasoning-text: #7d6f61;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  min-height: 100vh;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease;
}

.app.ready {
  opacity: 1;
  pointer-events: auto;
}

html[data-theme="dark"] .app,
body[data-theme="dark"] .app {
  --chat-user-bg: #427766;
  --chat-user-text: #ecfff8;
  --chat-assistant-bg: rgba(10, 28, 22, 0.96);
  --chat-assistant-text: #e5f7f0;
  --chat-reasoning-bg: rgba(37, 43, 36, 0.95);
  --chat-reasoning-text: #cabdac;
}

.sidebar-shell,
.chat-shell {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.sidebar-shell {
  display: none;
}

.chat-shell {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: calc(100vh - 40px);
  overflow: hidden;
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0 16px;
}

.chat-header h1 {
  margin: 0 0 6px;
  font-size: 26px;
}

.chat-toolbar {
  padding: 16px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.chat-header .button,
.chat-toolbar .button,
.chat-toolbar .pill {
  backdrop-filter: blur(10px);
}

.profile-chip {
  min-width: 0;
  padding-right: 14px;
}

.profile-chip canvas {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--line) 88%, transparent);
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.settings-panel {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
  margin-bottom: 12px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  align-items: end;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin-bottom: 0;
}

.checkbox-row input {
  width: auto;
  min-height: 0;
}

.challenge-button.active {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  background: color-mix(in srgb, var(--accent) 18%, var(--panel-strong));
}

.workspace {
  padding: 22px;
  display: grid;
  gap: 16px;
  align-content: start;
  overflow: auto;
}

.thread {
  padding: 22px 0;
  display: grid;
  gap: 14px;
  overflow: auto;
  align-content: start;
  background: transparent;
}

.history-list {
  display: grid;
  gap: 10px;
}

.current-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.history-toggle-inline {
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.current-chat-card {
  display: grid;
  gap: 4px;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
}

.history-item {
  display: grid;
  gap: 4px;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
  cursor: pointer;
  text-align: left;
}

.history-item.active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--panel-strong));
}

.history-item-title {
  font-weight: 700;
}

.history-item-meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.message {
  display: grid;
  gap: 6px;
}

.message.user {
  justify-items: end;
}

.message.assistant {
  justify-items: start;
}

.message.user .message-label {
  text-align: right;
  justify-self: end;
}

.message-label {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.bubble-copy {
  opacity: 0;
  transition: opacity 120ms ease;
  position: absolute;
  top: 8px;
  right: 8px;
  min-height: 30px;
  padding: 0 9px;
  border-radius: 12px;
  font-size: 0.84rem;
  box-shadow: none;
}

.bubble-wrap:hover .bubble-copy,
.bubble-wrap:focus-within .bubble-copy {
  opacity: 1;
}

.bubble-wrap {
  position: relative;
  width: 100%;
}

.message.user .bubble-wrap {
  max-width: min(58%, 680px);
  justify-self: end;
}

.message.assistant .bubble-wrap {
  max-width: min(70%, 820px);
}

.message-bubble {
  max-width: 100%;
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px solid var(--line);
  line-height: 1.55;
  white-space: pre-wrap;
  font-size: 1rem;
}

.message.user .message-bubble {
  background: var(--chat-user-bg);
  color: var(--chat-user-text);
}

.message.user .bubble-copy {
  background: rgba(10, 43, 33, 0.16);
  border-color: rgba(241, 255, 249, 0.16);
  color: rgba(247, 255, 251, 0.96);
}

.message.user .bubble-copy:hover {
  background: rgba(10, 43, 33, 0.24);
}

.message.assistant .message-bubble {
  background: var(--chat-assistant-bg);
  color: var(--chat-assistant-text);
}

.message-bubble.markdown :first-child {
  margin-top: 0;
}

.message-bubble.markdown :last-child {
  margin-bottom: 0;
}

.message-bubble.markdown pre {
  overflow: auto;
  padding: 12px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--text) 6%, transparent);
}

.message-bubble.markdown p,
.message-bubble.markdown ul,
.message-bubble.markdown ol,
.message-bubble.markdown blockquote {
  margin: 0 0 0.65em;
}

.message-bubble.markdown ul,
.message-bubble.markdown ol {
  padding-left: 1.35em;
}

.message-bubble.markdown li {
  margin: 0.18em 0;
}

.message-bubble.markdown h1,
.message-bubble.markdown h2,
.message-bubble.markdown h3,
.message-bubble.markdown h4 {
  margin: 0 0 0.5em;
  line-height: 1.2;
}

.message-bubble.markdown blockquote {
  margin-left: 0;
  padding-left: 12px;
  border-left: 3px solid color-mix(in srgb, var(--accent) 50%, var(--line));
  color: var(--muted);
}

.thinking-block {
  max-width: min(72%, 840px);
  width: 100%;
  display: grid;
  gap: 8px;
}

.thinking-block summary {
  cursor: pointer;
  list-style: none;
  color: var(--muted);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.thinking-block summary::-webkit-details-marker {
  display: none;
}

.thinking-body {
  padding: 0;
}

.thinking-tools {
  display: none;
}

.thinking-body .message-bubble {
  max-width: 100%;
  background: var(--chat-reasoning-bg);
  color: var(--chat-reasoning-text);
  border-color: color-mix(in srgb, var(--line) 78%, transparent);
  box-shadow: inset 0 1px 0 color-mix(in srgb, white 26%, transparent);
}

.empty-thread {
  padding: 24px;
  border: 1px dashed var(--line);
  border-radius: 18px;
  color: var(--muted);
  text-align: center;
}

.composer {
  padding: 18px 0 22px;
  display: grid;
  gap: 12px;
}

.composer-row {
  display: grid;
  grid-template-columns: auto auto auto minmax(0, 1fr) auto auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
}

.composer-row .button {
  min-width: 54px;
  padding: 0 12px;
}

.composer textarea {
  min-height: 74px;
  max-height: 74px;
  font-size: 1rem;
  resize: none;
  line-height: 1.35;
}

.omni-button {
  font-size: 1.05rem;
}

.mic-button.active {
  border-color: color-mix(in srgb, var(--accent) 60%, var(--line));
  background: color-mix(in srgb, var(--accent) 18%, var(--panel-strong));
}

.mic-button.unsupported {
  opacity: 1;
}

.mic-button.unsupported .button-icon {
  color: var(--muted);
}

.challenge-button.active .button-icon {
  color: #f6c453;
}

.composer-attachments {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
}

.composer-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.attachment-summary {
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
  color: var(--muted);
}

.vision-preview {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
}

.vision-preview img {
  width: 96px;
  height: 96px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.feature-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .app {
    grid-template-columns: 1fr;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .composer-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .composer-row textarea {
    grid-column: 1 / -1;
  }

  .composer-row #omniButton {
    grid-column: 2;
  }

  .composer-row #sendButton {
    grid-column: 3;
    justify-self: end;
  }
}