/* Chat — minimal flat UI */

.chat-container {
  max-width: var(--max-w);
  margin: 0 auto;
  height: calc(100dvh - 100px);
  display: flex;
  flex-direction: column;
  padding: var(--space-4) var(--page-gutter);
  gap: var(--space-3);
}

#chat-root { display: contents; }

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.chat-title {
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0;
  line-height: 1.2;
}

.chat-subtitle {
  font-size: var(--text-xs);
  color: var(--color-ink-3);
  margin: 2px 0 0;
}

.chat-api-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.3rem 0.625rem;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-ink-2);
  background: transparent;
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}
.chat-api-link:hover {
  border-color: var(--color-ink-4);
  color: var(--color-ink);
}

.chat-settings {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 140px;
  position: relative;
}
.setting-grow { flex: 1; min-width: 0; }

.setting-label {
  font-size: 10px;
  font-weight: 500;
  color: var(--color-ink-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.setting-input {
  width: 100%;
  padding: 0.4rem 0.625rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-ink);
  background: var(--color-bg);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--dur) var(--ease);
}
.setting-input:focus { border-color: var(--color-ink-3); }

.select-wrap { position: relative; }
.setting-select {
  cursor: pointer;
  appearance: none;
  padding-right: 1.75rem;
  width: 100%;
}
.select-chev {
  position: absolute;
  right: 0.625rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--color-ink-3);
}

.chat-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.chat-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  color: var(--color-ink-3);
  text-align: center;
}
.chat-empty h3 {
  font-size: var(--text-md);
  font-weight: 500;
  color: var(--color-ink-2);
  margin: var(--space-1) 0 0;
}
.chat-empty p { font-size: var(--text-sm); margin: 0; }

.msg {
  display: flex;
  gap: var(--space-2);
  max-width: 88%;
}
.msg-user { align-self: flex-end; flex-direction: row-reverse; }
.msg-assistant { align-self: flex-start; }

.msg-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 500;
  flex-shrink: 0;
  color: var(--color-bg);
  background: var(--color-ink-3);
}
.msg-user .msg-avatar { background: var(--color-ink); }

.msg-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.msg-bubble {
  padding: 0.5rem 0.75rem;
  font-size: var(--text-sm);
  line-height: 1.55;
  border-radius: var(--radius-md);
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  border: 1px solid var(--color-border);
}
.msg-user .msg-bubble {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
}
.msg-assistant .msg-bubble {
  background: var(--color-bg-2);
  color: var(--color-ink);
  border-color: var(--color-border);
}

.msg-bubble.streaming::after {
  content: '▍';
  display: inline-block;
  color: var(--color-ink-3);
  animation: blink 1s steps(2) infinite;
  margin-left: 1px;
}
@keyframes blink { 50% { opacity: 0; } }

.msg-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 10px;
  color: var(--color-ink-3);
  padding: 0 var(--space-1);
}

.msg-copy {
  background: none;
  border: none;
  padding: 2px 4px;
  font-size: 10px;
  color: var(--color-ink-3);
  cursor: pointer;
  border-radius: 3px;
  transition: color var(--dur) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-family: var(--font-sans);
}
.msg-copy:hover { color: var(--color-ink); }

.msg-error {
  padding: 0.5rem 0.75rem;
  font-size: var(--text-sm);
  line-height: 1.5;
  border-radius: var(--radius-md);
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-bd);
  color: var(--color-error);
  white-space: pre-wrap;
}

.msg-typing {
  display: inline-flex;
  gap: 3px;
  padding: 2px 0;
}
.msg-typing span {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-ink-3);
  animation: typing 1.4s infinite;
}
.msg-typing span:nth-child(2) { animation-delay: 0.2s; }
.msg-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
  0%, 60%, 100% { opacity: 0.3; }
  30% { opacity: 1; }
}

.chat-form-wrap { display: flex; flex-direction: column; gap: var(--space-1); }

.chat-form {
  display: flex;
  gap: var(--space-2);
  align-items: flex-end;
  background: var(--color-bg);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  transition: border-color var(--dur) var(--ease);
}
.chat-form:focus-within { border-color: var(--color-ink-3); }

.chat-input {
  flex: 1;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink);
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  min-height: 24px;
  max-height: 180px;
}
.chat-input:disabled { opacity: 0.5; cursor: not-allowed; }
.chat-input::placeholder { color: var(--color-ink-3); }

.chat-send {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-bg);
  background: var(--color-ink);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--dur) var(--ease);
  flex-shrink: 0;
}
.chat-send:hover:not(:disabled) { background: var(--color-ink-2); }
.chat-send:disabled { opacity: 0.4; cursor: not-allowed; }
.chat-send[data-mode="stop"] { background: var(--color-error); }

.chat-hint {
  font-size: 11px;
  color: var(--color-ink-3);
  text-align: center;
  margin: 0;
}
.chat-hint kbd {
  font-family: var(--font-sans);
  font-size: 10px;
  padding: 1px 5px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  color: var(--color-ink-2);
}

.chat-messages::-webkit-scrollbar { width: 6px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb {
  background: var(--color-border-2);
  border-radius: 3px;
}

@media (max-width: 720px) {
  .chat-container {
    padding: var(--space-3);
    height: calc(100dvh - 92px);
  }
  .chat-header { flex-wrap: wrap; }
  .chat-title { font-size: var(--text-md); }
  .chat-subtitle { font-size: 11px; }
  .chat-settings { flex-direction: column; gap: var(--space-2); }
  .setting-group { min-width: 0; }
  .setting-input { font-size: 16px; }
  .msg-bubble { font-size: 14px; }
}

/* Combobox */
.combobox { position: relative; }
.combobox-input { padding-right: 1.875rem; cursor: pointer; }
.combobox-input:focus { cursor: text; }

.combobox-trigger {
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: calc(100% - 4px);
  background: transparent;
  border: 0;
  color: var(--color-ink-3);
  cursor: pointer;
  border-radius: 4px;
  padding: 0;
}
.combobox-trigger:hover { color: var(--color-ink); }
.combobox[data-open] .combobox-trigger { color: var(--color-ink); }

.combobox-list {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 50;
  margin: 0;
  padding: var(--space-1);
  list-style: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-md);
  max-height: 240px;
  overflow-y: auto;
}

.combobox-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  cursor: pointer;
  user-select: none;
  line-height: 1.3;
}
.combobox-item.is-highlight { background: var(--color-bg-2); }
.combobox-item.is-selected { font-weight: 500; }
.combobox-item-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.combobox-check { flex: 0 0 auto; color: var(--color-ink-3); }
.combobox-empty {
  padding: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-ink-3);
  text-align: center;
}

/* Mode tabs */
.chat-tabs {
  display: flex;
  gap: 2px;
  padding: 2px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.chat-tab {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-3);
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.chat-tab:hover { color: var(--color-ink); }
.chat-tab.is-active { background: var(--color-bg); color: var(--color-ink); }

/* Vision / OCR */
.vision-task {
  display: inline-flex;
  padding: 2px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  align-self: flex-start;
}
.vision-task-btn {
  padding: 0.3rem 0.625rem;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-ink-3);
  background: transparent;
  border: 0;
  border-radius: 3px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.vision-task-btn:hover { color: var(--color-ink); }
.vision-task-btn.is-active { background: var(--color-bg); color: var(--color-ink); }

.vision-panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow-y: auto;
}

.vision-preview {
  width: 100%;
  min-height: 220px;
  max-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-2);
  border: 1px dashed var(--color-border-2);
  border-radius: var(--radius-md);
  overflow: hidden;
  padding: var(--space-3);
}
.vision-preview-img {
  max-width: 100%;
  max-height: 336px;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  display: block;
}
.vision-preview-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-ink-3);
  text-align: center;
  padding: var(--space-5);
}
.vision-preview-empty p {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-2);
  margin: 0;
}
.vision-preview-empty span { font-size: var(--text-xs); color: var(--color-ink-3); }

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

.vision-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.vision-toolbar-spacer { flex: 1; min-width: 0; }

.vision-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.4rem 0.75rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  background: transparent;
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.vision-btn:hover:not(:disabled) { background: var(--color-bg-2); border-color: var(--color-ink-4); }
.vision-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.vision-btn-ghost { background: transparent; border-color: transparent; color: var(--color-ink-3); }
.vision-btn-ghost:hover:not(:disabled) { color: var(--color-ink); background: var(--color-bg-2); border-color: var(--color-bg-2); }
.vision-btn-run { background: var(--color-ink); color: var(--color-bg); border-color: var(--color-ink); }
.vision-btn-run:hover:not(:disabled) { background: var(--color-ink-2); border-color: var(--color-ink-2); color: var(--color-bg); }

.vision-meta {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
  font-size: 10px;
  color: var(--color-ink-3);
  margin: 0;
}
.vision-meta span:first-child {
  font-weight: 500;
  color: var(--color-ink-2);
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.vision-result {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.vision-result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.vision-result-label {
  font-size: 10px;
  font-weight: 500;
  color: var(--color-ink-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.vision-result-text {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-ink);
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.vision-result-mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background: var(--color-bg);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  max-height: 360px;
  overflow-y: auto;
}
.vision-result-error {
  background: var(--color-error-bg);
  border-color: var(--color-error-bd);
}
.vision-result-error .vision-result-label,
.vision-result-error .vision-result-text { color: var(--color-error); }

.vision-empty {
  text-align: center;
  padding: var(--space-5) var(--space-2);
  color: var(--color-ink-3);
  font-size: var(--text-sm);
}
.vision-empty p { margin: 0; }
.vision-empty strong { color: var(--color-ink-2); font-weight: 500; }

/* Thinking block */
.msg-thinking {
  margin: 0 0 var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-2);
  overflow: hidden;
}
.msg-thinking > summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  font-size: 11px;
  font-weight: 500;
  color: var(--color-ink-3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  user-select: none;
}
.msg-thinking > summary::-webkit-details-marker { display: none; }
.msg-thinking > summary:hover { color: var(--color-ink); }
.msg-thinking[open] > summary {
  border-bottom: 1px solid var(--color-border);
  color: var(--color-ink);
}
.msg-thinking-chev { transition: transform 0.12s ease; flex: 0 0 auto; }
.msg-thinking[open] .msg-thinking-chev { transform: rotate(90deg); }

.msg-thinking-content {
  padding: var(--space-3);
  font-size: 12px;
  line-height: 1.55;
  color: var(--color-ink-3);
  white-space: pre-wrap;
  font-family: var(--font-mono);
  max-height: 280px;
  overflow-y: auto;
}