:root {
  color-scheme: light;
  --page: #eef1f4;
  --shell: #f7f7f7;
  --chat: #ededed;
  --surface: #ffffff;
  --line: #d9dee5;
  --line-strong: #b8c2cc;
  --text: #17202a;
  --muted: #687586;
  --wechat: #95ec69;
  --wechat-border: #83d95c;
  --green: #1aad19;
  --green-dark: #168f16;
  --soft-green: #e8f7e5;
  --blue: #4d6bfe;
  --purple: #7c5cff;
  --amber: #b45c2a;
  --amber-soft: #fff0e6;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

button,
select,
textarea,
input {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  border-radius: 8px;
  height: 36px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  background: var(--surface);
  color: var(--text);
}

button:hover:not(:disabled) {
  border-color: var(--line-strong);
  background: #f9fafb;
}

button:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.primary {
  background: var(--green);
  color: #fff;
  border-color: var(--green);
}

.primary:hover:not(:disabled) {
  background: var(--green-dark);
  border-color: var(--green-dark);
}

.secondary {
  background: var(--surface);
}

.icon-only {
  width: 44px;
  height: 44px;
  justify-content: center;
  padding: 0;
  border-radius: 8px;
  font-size: 18px;
}

.app {
  min-height: 100%;
  display: grid;
  grid-template-columns: minmax(230px, 290px) minmax(420px, 1fr) minmax(250px, 330px);
  grid-template-rows: 58px minmax(0, 1fr);
}

.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 18px;
  background: var(--shell);
  border-bottom: 1px solid var(--line);
}

.brand {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 10px;
  display: inline-grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 6px 18px rgba(77, 107, 254, 0.22);
  font-weight: 800;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 20px;
  line-height: 1.15;
  font-weight: 780;
}

h2 {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}

.topbar p {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.top-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.sidebar,
.inspector {
  min-height: 0;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #f5f7f9;
}

.sidebar {
  border-right: 1px solid var(--line);
}

.inspector {
  border-left: 1px solid var(--line);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.panel.grow {
  min-height: 0;
  flex: 1;
  overflow: auto;
}

.settings-panel summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 760;
  list-style: none;
}

.settings-panel summary::-webkit-details-marker {
  display: none;
}

.settings-panel summary::after {
  content: "展开";
  float: right;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.settings-panel[open] summary::after {
  content: "收起";
}

.field {
  display: grid;
  gap: 6px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
}

input[type="text"],
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 8px;
  color: var(--text);
}

select {
  margin-top: 12px;
}

.field select {
  margin-top: 0;
}

.hint {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
}

.facts {
  margin: 14px 0 0;
  display: grid;
  gap: 8px;
}

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

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  text-align: right;
  font-weight: 650;
}

.chat-shell {
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background: var(--chat);
}

.conversation-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 20px;
  background: var(--shell);
  border-bottom: 1px solid #dadada;
}

.conversation-meta strong,
.conversation-meta span {
  display: block;
}

.conversation-meta strong {
  font-size: 17px;
}

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

.typing-status {
  color: var(--green) !important;
}

.state-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.pill {
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  padding: 3px 8px;
  font-size: 12px;
  white-space: nowrap;
}

.pill.ok {
  color: #137d2d;
  border-color: #b7dfbd;
  background: var(--soft-green);
}

.pill.warn {
  color: var(--amber);
  border-color: #efc7ad;
  background: var(--amber-soft);
}

.chat-log {
  min-height: 0;
  overflow: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  display: flex;
}

.message.user {
  justify-content: flex-end;
}

.message.system {
  justify-content: center;
}

.bubble {
  max-width: min(700px, 78%);
  border-radius: 8px;
  padding: 10px 12px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: var(--surface);
  border: 1px solid #dedede;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.04);
}

.message.user .bubble {
  background: var(--wechat);
  border-color: var(--wechat-border);
}

.message.assistant .bubble {
  background: #fff;
  border-color: #dedede;
}

.message.system .bubble {
  max-width: 88%;
  border-color: transparent;
  background: rgba(0, 0, 0, 0.06);
  color: #6b7280;
  box-shadow: none;
  font-size: 12px;
}

.message.pending .bubble::after {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-left: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 0.9s infinite ease-in-out;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.25;
  }
  50% {
    opacity: 1;
  }
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  gap: 10px;
  padding: 12px 20px 14px;
  background: var(--shell);
  border-top: 1px solid #d7d7d7;
}

textarea {
  width: 100%;
  min-height: 44px;
  max-height: 140px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  background: var(--surface);
}

textarea:focus,
select:focus,
input:focus,
button:focus-visible {
  outline: 2px solid rgba(26, 173, 25, 0.18);
  border-color: var(--green);
}

.tokens {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.token {
  border-radius: 999px;
  background: #eef3f6;
  color: var(--text);
  padding: 4px 9px;
  font-size: 12px;
}

.token.teal {
  background: var(--soft-green);
  color: #137d2d;
}

.token.amber {
  background: var(--amber-soft);
  color: var(--amber);
}

.status-list {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 10px;
  border: 1px solid #e3e9ee;
  border-radius: 6px;
  background: #fbfcfd;
}

.status-row span {
  flex: 0 0 auto;
  color: var(--muted);
  white-space: nowrap;
}

.status-row strong {
  min-width: 0;
  text-align: right;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.empty {
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .message.pending .bubble::after {
    animation: none;
  }
}

@media (max-width: 1100px) {
  .app {
    grid-template-columns: minmax(220px, 280px) minmax(420px, 1fr);
    grid-template-rows: 58px minmax(0, 1fr) auto;
  }

  .inspector {
    grid-column: 1 / -1;
    border-left: 0;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto minmax(420px, 1fr) auto;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 16px;
  }

  .top-actions {
    justify-content: flex-start;
  }

  .sidebar,
  .inspector {
    border: 0;
    border-bottom: 1px solid var(--line);
  }

  .inspector {
    display: flex;
  }

  .conversation-meta {
    align-items: flex-start;
    flex-direction: column;
  }

  .state-pills {
    justify-content: flex-start;
  }

  .bubble {
    max-width: 92%;
  }
}