:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --line: #dfe6f1;
  --text: #1f2937;
  --muted: #667085;
  --blue: #2f6df6;
  --blue-soft: #eaf1ff;
  --green: #13a46b;
  --red: #d64545;
  --shadow: 0 18px 45px rgba(23, 37, 84, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  filter: brightness(0.96);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  color: var(--text);
  background: #fff;
}

textarea {
  resize: vertical;
  line-height: 1.6;
}

.login-body {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  padding: 34px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
}

.login-card h1 {
  margin: 18px 0 6px;
  font-size: 26px;
}

.login-card p {
  margin: 0 0 24px;
  color: var(--muted);
}

.login-form {
  display: grid;
  gap: 16px;
}

.login-form label {
  display: grid;
  gap: 7px;
  font-weight: 700;
}

.form-error {
  min-height: 22px;
  color: var(--red);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 232px 1fr;
}

.sidebar {
  padding: 20px 14px;
  background: #101828;
  color: #fff;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-title {
  padding: 10px 10px 18px;
  font-weight: 800;
  font-size: 19px;
}

.sidebar nav {
  display: grid;
  gap: 8px;
}

.nav-item,
.logout-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  color: #cbd5e1;
}

.nav-item.active {
  color: #fff;
  background: rgba(47, 109, 246, 0.28);
}

.logout-btn {
  margin-top: auto;
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.main {
  padding: 26px;
  overflow: auto;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.page-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.page-head h1 {
  margin: 0 0 6px;
  font-size: 26px;
}

.page-head p {
  margin: 0;
  color: var(--muted);
}

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

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.metric-card,
.progress-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  box-shadow: 0 8px 24px rgba(23, 37, 84, 0.04);
}

.metric-title {
  color: var(--muted);
  font-weight: 700;
}

.metric-value {
  margin-top: 14px;
  font-size: 30px;
  font-weight: 800;
}

.metric-detail {
  margin-top: 8px;
  color: var(--muted);
  word-break: break-all;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 14px;
}

.pill.ok {
  background: #e8f8f0;
  color: var(--green);
}

.pill.bad {
  background: #fff0f0;
  color: var(--red);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.log-box {
  min-height: 360px;
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0f172a;
  color: #dbeafe;
  overflow: auto;
  white-space: pre-wrap;
}

.tool-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-bottom: 16px;
}

.progress-card h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.muted {
  color: var(--muted);
  margin-bottom: 12px;
}

.panel-title {
  font-weight: 800;
  margin-bottom: 12px;
}

.chat-layout,
.knowledge-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 16px;
  min-height: 620px;
}

.chat-list-panel,
.chat-panel,
.knowledge-tree-card,
.knowledge-content-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(23, 37, 84, 0.04);
}

.chat-list-panel,
.knowledge-tree-card {
  padding: 16px;
  overflow: auto;
}

.conversation-list {
  display: grid;
  gap: 8px;
}

.conversation-item {
  width: 100%;
  padding: 10px 12px;
  text-align: left;
  color: var(--text);
  background: #f8fafc;
  border: 1px solid var(--line);
}

.conversation-item.active {
  color: var(--blue);
  background: var(--blue-soft);
  border-color: #b9ccff;
}

.chat-panel {
  display: grid;
  grid-template-rows: 1fr auto auto;
  min-width: 0;
}

.chat-messages {
  min-height: 430px;
  padding: 18px;
  overflow: auto;
  display: grid;
  align-content: start;
  gap: 12px;
}

.chat-message {
  max-width: 86%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #f8fafc;
}

.chat-message.user {
  justify-self: end;
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.chat-message.assistant {
  justify-self: start;
}

.message-role {
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 800;
  opacity: 0.82;
}

.message-content {
  white-space: pre-wrap;
  line-height: 1.7;
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--line);
}

#chatHint {
  padding: 0 14px 14px;
}

.empty-state {
  color: var(--muted);
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: #f8fafc;
}

.sync-time {
  flex: 0 0 auto;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-weight: 700;
}

.knowledge-search {
  grid-template-columns: 1fr auto auto;
}

.knowledge-tree {
  display: grid;
  gap: 4px;
  color: var(--text);
}

.knowledge-node {
  min-height: 30px;
  padding: 6px 8px;
  border-radius: 7px;
  word-break: break-all;
}

.knowledge-node.file {
  cursor: pointer;
  color: var(--blue);
}

.knowledge-node.file:hover {
  background: var(--blue-soft);
}

.knowledge-content-card {
  min-width: 0;
  padding: 16px;
}

.knowledge-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
  margin-bottom: 12px;
}

.knowledge-file {
  min-height: 360px;
  max-height: 520px;
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfdff;
  color: var(--text);
  overflow: auto;
  white-space: pre-wrap;
  line-height: 1.65;
}

.search-results {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.search-result {
  width: 100%;
  display: grid;
  gap: 6px;
  padding: 12px;
  text-align: left;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
}

.search-result strong {
  color: var(--blue);
}

.search-result span {
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 920px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 2;
  }

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

  .tool-form {
    grid-template-columns: 1fr;
  }

  .chat-layout,
  .knowledge-layout {
    grid-template-columns: 1fr;
  }

  .chat-form,
  .knowledge-search {
    grid-template-columns: 1fr;
  }
}