:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --line: #dfe3ea;
  --text: #172033;
  --muted: #667085;
  --accent: #1677ff;
  --ok: #17803d;
  --bad: #c0262d;
  --warn: #b7791f;
}

* {
  box-sizing: border-box;
}

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

button,
textarea {
  font: inherit;
}

.shell {
  min-height: 100vh;
  padding: 24px;
}

.panel {
  width: min(1120px, 100%);
  height: calc(100vh - 48px);
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
}

p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.topbar button,
.composer button {
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  padding: 0 16px;
  height: 38px;
  cursor: pointer;
}

.topbar button {
  background: #eef4ff;
  color: #175cd3;
}

.messages {
  overflow: auto;
  padding: 18px;
}

.msg {
  max-width: 860px;
  margin: 0 0 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  white-space: pre-wrap;
  line-height: 1.55;
}

.msg.user {
  margin-left: auto;
  background: #f1f6ff;
}

.msg.agent {
  background: #fff;
}

.agent-turn {
  max-width: 860px;
  margin: 0 0 14px;
}

.agent-turn .msg {
  max-width: none;
}

.answer.pending {
  display: none;
}

.answer {
  white-space: normal;
}

.answer > :first-child {
  margin-top: 0;
}

.answer > :last-child {
  margin-bottom: 0;
}

.answer p,
.answer ul,
.answer ol,
.answer blockquote,
.answer pre,
.answer .table-wrap {
  margin: 0 0 10px;
}

.answer ul,
.answer ol {
  padding-left: 22px;
}

.answer h1,
.answer h2,
.answer h3,
.answer h4,
.answer h5,
.answer h6 {
  margin: 14px 0 8px;
  line-height: 1.35;
}

.answer h1 {
  font-size: 22px;
}

.answer h2 {
  font-size: 18px;
}

.answer h3 {
  font-size: 16px;
}

.answer blockquote {
  padding-left: 10px;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

.answer code {
  padding: 1px 4px;
  border-radius: 4px;
  background: #f2f4f7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
}

.answer pre {
  overflow: auto;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #101828;
  color: #f9fafb;
  white-space: pre-wrap;
}

.answer pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.answer a {
  color: var(--accent);
}

.answer .table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.answer table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  white-space: nowrap;
}

.answer th,
.answer td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.answer th {
  background: #f8fafc;
  font-weight: 650;
}

.answer tr:last-child td {
  border-bottom: 0;
}

.token-usage {
  margin: -6px 0 12px;
  color: var(--muted);
  font-size: 12px;
}

.token-usage:empty {
  display: none;
}

.call-chain {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.trace {
  max-width: 860px;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
}

.trace strong {
  color: var(--text);
}

.trace.ok strong {
  color: var(--ok);
}

.trace.bad strong {
  color: var(--bad);
}

.tool-tag {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 8px;
  align-items: start;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f8fafc;
  color: var(--text);
  font-size: 13px;
}

.tool-tag.loading {
  border-color: #fed7aa;
  background: #fff7ed;
}

.tool-tag.ok {
  border-color: #bbf7d0;
  background: #f0fdf4;
}

.tool-tag.bad {
  border-color: #fecaca;
  background: #fff1f2;
}

.tool-icon {
  width: 18px;
  height: 18px;
  margin-top: 1px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.tool-tag.loading .tool-icon {
  border: 2px solid #fdba74;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

.tool-tag.ok .tool-icon {
  background: var(--ok);
}

.tool-tag.bad .tool-icon {
  background: var(--bad);
}

.tool-title {
  font-weight: 650;
  line-height: 1.35;
}

.trace-detail {
  max-height: 260px;
  overflow: auto;
  margin: 8px 0 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff7f7;
  color: #7f1d1d;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
}

.error-block {
  border-color: #f3b5b5;
  background: #fffafa;
}

.error-title {
  margin-bottom: 8px;
  color: var(--bad);
  font-weight: 650;
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 14px;
  border-top: 1px solid var(--line);
  background: #fbfcfe;
}

textarea {
  resize: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  outline: none;
  min-height: 44px;
}

textarea:focus {
  border-color: var(--accent);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 0;
  }

  .panel {
    height: 100vh;
    border: 0;
    border-radius: 0;
  }

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

  .tool-tag {
    border-radius: 8px;
  }
}