:root {
  --ai-bg: #f5f5f0;
  --ai-card: #ffffff;
  --ai-border: #d4c4a8;
  --ai-text: #1a1a1a;
  --ai-dim: #4a4a4a;
  --ai-accent: #3d5a98;
  --ai-accent-dim: rgba(61, 90, 152, 0.12);
  --ai-radius: 6px;
}

.ai-assistant-tab {
  position: fixed;
  right: 0;
  left: auto;
  top: 36%;
  z-index: 9998;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 8px;
  writing-mode: vertical-rl;
  color: var(--ai-accent);
  background: var(--ai-card);
  border: 1px solid var(--ai-border);
  border-right: 0;
  border-radius: var(--ai-radius) 0 0 var(--ai-radius);
  box-shadow: 0 2px 10px rgba(44, 36, 22, 0.12);
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
}

.ai-assistant-tab span:first-child {
  writing-mode: horizontal-tb;
  transform: rotate(180deg);
}

.ai-assistant-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 9999;
  width: min(510px, 100vw);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--ai-bg);
  border-left: 1px solid var(--ai-border);
  box-shadow: -8px 0 24px rgba(44, 36, 22, 0.16);
  transform: translateX(100%);
  transition: transform 0.22s ease;
  color: var(--ai-text);
  font-family: "Microsoft YaHei","PingFang SC","Helvetica Neue",sans-serif;
}

.ai-assistant-drawer.open {
  transform: translateX(0);
}

.ai-assistant-drawer.standalone {
  position: static;
  width: 100%;
  height: 100%;
  transform: none;
  box-shadow: none;
  border-left: 0;
}

.ai-assistant-head {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 76px;
  border-bottom: 1px solid var(--ai-border);
}

.ai-assistant-title {
  font-size: 24px;
  font-weight: 800;
}

.ai-assistant-close {
  position: absolute;
  right: 14px;
  top: 17px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--ai-border);
  border-radius: var(--ai-radius);
  color: var(--ai-text);
  background: var(--ai-card);
  cursor: pointer;
  font-size: 20px;
}

.ai-assistant-messages {
  flex: 1;
  margin: 20px 12px;
  padding: 18px 20px;
  overflow: auto;
  background: var(--ai-card);
  border: 1px solid var(--ai-border);
  border-radius: var(--ai-radius);
  font-size: 15px;
  line-height: 1.7;
}

.ai-assistant-placeholder {
  color: var(--ai-dim);
  font-size: 17px;
  font-style: italic;
}

.ai-msg {
  margin-bottom: 14px;
  white-space: normal;
}

.ai-msg-body {
  white-space: normal;
}

.ai-msg-body p {
  margin: 0 0 8px;
}

.ai-msg-body h2,
.ai-msg-body h3 {
  margin: 10px 0 6px;
  color: var(--ai-text);
  line-height: 1.35;
}

.ai-msg-body h2 {
  font-size: 17px;
}

.ai-msg-body h3 {
  font-size: 16px;
}

.ai-msg-body strong {
  font-weight: 800;
}

.ai-msg-body em {
  font-style: normal;
  color: var(--ai-text);
}

.ai-msg-body ul {
  margin: 4px 0 10px 18px;
  padding: 0;
}

.ai-msg-body li {
  margin: 3px 0;
}

.ai-table-wrap {
  max-width: 100%;
  margin: 8px 0 12px;
  overflow-x: auto;
  border: 1px solid var(--ai-border);
  border-radius: var(--ai-radius);
}

.ai-msg-body table {
  width: 100%;
  border-collapse: collapse;
  min-width: 360px;
  background: #fff;
}

.ai-msg-body th,
.ai-msg-body td {
  padding: 7px 9px;
  border-bottom: 1px solid rgba(212, 196, 168, 0.72);
  border-right: 1px solid rgba(212, 196, 168, 0.54);
  text-align: left;
  vertical-align: top;
  line-height: 1.45;
}

.ai-msg-body th:last-child,
.ai-msg-body td:last-child {
  border-right: 0;
}

.ai-msg-body tr:last-child td {
  border-bottom: 0;
}

.ai-msg-body th {
  background: #f8f5ec;
  color: var(--ai-text);
  font-weight: 800;
}

.ai-msg-body code {
  padding: 1px 4px;
  border: 1px solid rgba(212, 196, 168, 0.7);
  border-radius: 4px;
  background: rgba(61, 90, 152, 0.06);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
}

.ai-msg-body pre {
  margin: 8px 0;
  padding: 10px;
  overflow: auto;
  border: 1px solid var(--ai-border);
  border-radius: var(--ai-radius);
  background: #f8f7f2;
}

.ai-list-item {
  position: relative;
  margin: 4px 0 4px 18px;
}

.ai-list-item::before {
  content: "•";
  position: absolute;
  left: -14px;
  color: var(--ai-accent);
}

.ai-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ai-dim);
  font-size: 14px;
  font-style: italic;
}

.ai-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--ai-accent);
  animation: ai-pulse 1s ease-in-out infinite;
}

@keyframes ai-pulse {
  0%, 100% { opacity: 0.35; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1); }
}

.ai-msg.user {
  color: var(--ai-accent);
  font-weight: 600;
}

.ai-msg.error {
  color: #a33a2a;
}

.ai-citations {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--ai-border);
  color: var(--ai-dim);
  font-size: 12px;
}

.ai-assistant-controls {
  padding: 0 12px 12px;
}

.ai-model-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  color: var(--ai-dim);
  font-size: 13px;
}

.ai-model-row select {
  min-width: 224px;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--ai-border);
  border-radius: var(--ai-radius);
  background: var(--ai-card);
  color: var(--ai-text);
  font: inherit;
}

.ai-thinking-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  margin-left: auto;
  color: var(--ai-text);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}

.ai-thinking-toggle input {
  width: 16px;
  height: 16px;
  accent-color: var(--ai-accent);
}

.ai-file-input {
  display: none;
}

.ai-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 0;
  margin: 0 0 8px;
}

.ai-attachment-chip {
  max-width: 100%;
  padding: 5px 8px;
  overflow: hidden;
  border: 1px solid rgba(212, 196, 168, 0.9);
  border-radius: var(--ai-radius);
  background: #f8f5ec;
  color: var(--ai-text);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ai-input-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

.ai-input {
  flex: 1;
  min-height: 78px;
  max-height: 160px;
  resize: vertical;
  padding: 14px 16px;
  border: 1px solid var(--ai-border);
  border-radius: var(--ai-radius);
  background: var(--ai-card);
  color: var(--ai-text);
  font: inherit;
  font-size: 16px;
}

.ai-input::placeholder {
  color: #777;
}

.ai-button-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ai-icon-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--ai-border);
  border-radius: var(--ai-radius);
  background: var(--ai-card);
  color: var(--ai-text);
  cursor: pointer;
  font-size: 20px;
}

.ai-icon-btn.primary {
  color: var(--ai-accent);
}

.ai-icon-btn.danger {
  color: #a33a2a;
  border-color: rgba(163, 58, 42, 0.45);
}

.ai-icon-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 720px) {
  .ai-assistant-drawer {
    top: auto;
    bottom: 0;
    width: 100vw;
    height: 88vh;
    border-left: 0;
    border-top: 1px solid var(--ai-border);
    transform: translateY(100%);
  }
  .ai-assistant-drawer.open {
    transform: translateY(0);
  }
  .ai-assistant-title {
    font-size: 20px;
  }
}