:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1f2937;
  --muted: #697386;
  --line: #dfe4ea;
  --blue: #2264d1;
  --green: #198754;
  --amber: #b7791f;
  --red: #c2413b;
  --shadow: 0 10px 30px rgba(20, 35, 60, 0.08);
}

* {
  box-sizing: border-box;
}

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

button,
textarea,
input {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  min-height: 38px;
  padding: 0 14px;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  border-color: #aeb8c5;
}

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

.shell {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.topbar h1 {
  margin: 0;
  font-size: 22px;
  line-height: 1.2;
}

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

.icon-button {
  min-width: 64px;
}

.search-panel,
.risk-panel,
.observe-panel,
.answer-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.search-panel {
  padding: 14px;
}

.search-panel label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

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

textarea {
  min-height: 96px;
  resize: vertical;
  padding: 12px;
}

input {
  height: 38px;
  padding: 0 11px;
}

.toolbar,
.item-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.toolbar {
  margin-top: 10px;
}

.tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 0;
}

.tab {
  white-space: nowrap;
  background: transparent;
}

.tab.active {
  border-color: var(--blue);
  color: var(--blue);
  background: #eef5ff;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 14px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 4px 0 10px;
}

h2 {
  margin: 0;
  font-size: 15px;
}

.section-heading span {
  color: var(--muted);
  font-size: 13px;
}

.results {
  display: grid;
  gap: 10px;
}

.answer-item {
  padding: 14px;
}

.answer-item header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.question {
  display: block;
  font-size: 15px;
  line-height: 1.35;
}

.meta {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.risk {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 12px;
  background: #edf7f0;
  color: var(--green);
}

.risk.medium {
  background: #fff8e6;
  color: var(--amber);
}

.risk.high {
  background: #fff0ee;
  color: var(--red);
}

.answer {
  margin: 12px 0;
  color: #334155;
  line-height: 1.65;
  font-size: 14px;
}

.side-area {
  display: grid;
  gap: 14px;
  align-content: start;
}

.risk-panel,
.observe-panel {
  padding: 14px;
}

.risk-panel ul {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.risk-panel li {
  border-left: 3px solid var(--red);
  padding-left: 9px;
  color: #475569;
  font-size: 13px;
  line-height: 1.45;
}

#observeForm {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.observe-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
  max-height: 240px;
  overflow: auto;
}

.observe-record {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px;
  font-size: 12px;
  color: #475569;
  background: #fafbfc;
}

.empty {
  background: #fff;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 18px;
  text-align: center;
}

@media (max-width: 860px) {
  .shell {
    padding: 12px;
  }

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

  .topbar {
    align-items: flex-start;
  }
}