:root {
  --bg: #f3f6fb;
  --panel: #ffffff;
  --text: #18212f;
  --muted: #667388;
  --primary: #0b63f6;
  --danger: #de3b3b;
  --line: #d8e0ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #f6f8fd, #ecf2fb);
  color: var(--text);
}

.layout {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 14px;
  min-height: 100vh;
  padding: 14px;
}

.layout.kb-collapsed {
  grid-template-columns: 1fr;
}

.kb-panel {
  display: block;
}

.layout.kb-collapsed .kb-panel {
  display: none;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  overflow: hidden;
}

h1 {
  margin: 0 0 8px;
  font-size: 20px;
}

h2 {
  margin: 0 0 10px;
  font-size: 16px;
}

label {
  display: block;
  margin: 10px 0 6px;
  font-size: 13px;
  color: var(--muted);
}

input,
textarea,
button {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
  padding: 10px 12px;
  font-size: 14px;
}

textarea {
  resize: vertical;
}

button {
  margin-top: 10px;
  background: var(--primary);
  color: #fff;
  border: 0;
  cursor: pointer;
}

.button-row {
  display: flex;
  gap: 8px;
}

.button-row button {
  flex: 1;
}

.ghost-btn {
  background: #fff;
  color: #35507a;
  border: 1px solid var(--line);
}

.hidden {
  display: none;
}

.muted {
  color: var(--muted);
  font-size: 12px;
}

.divider {
  height: 1px;
  margin: 14px 0;
  background: var(--line);
}

.kb-list {
  max-height: 38vh;
  overflow: auto;
}

.kb-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 10px;
}

.kb-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.kb-actions {
  display: flex;
  gap: 6px;
}

.edit-btn {
  width: auto;
  background: #fff;
  color: #294b93;
  border: 1px solid #b9ccf4;
  margin: 0;
  padding: 4px 8px;
}

.delete-btn {
  width: auto;
  background: #fff;
  color: var(--danger);
  border: 1px solid #ffc8c8;
  margin: 0;
  padding: 4px 8px;
}

.kb-content {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
}

.chat-panel {
  display: flex;
  flex-direction: column;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.kb-toggle-btn {
  width: auto;
  margin: 0;
  padding: 8px 12px;
}

.status {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.status.ok {
  color: #1c7f40;
  border-color: #b4e7c4;
  background: #edfdf1;
}

.status.bad {
  color: #b63333;
  border-color: #f3b9b9;
  background: #fff4f4;
}

.chat-box {
  flex: 1;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  margin: 10px 0;
  background: #fbfdff;
}

.msg {
  margin-bottom: 12px;
}

.msg .role {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.msg .content {
  line-height: 1.6;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
}

.msg.user .content {
  border-color: #bfd4ff;
  background: #edf3ff;
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 10px;
}

.chat-form button {
  margin: 0;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }
}