:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #17202a;
  --muted: #667085;
  --line: #d9dee7;
  --accent: #1769e0;
  --accent-strong: #0f4fb0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: 44px;
  line-height: 1;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.status {
  min-width: 150px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  text-align: center;
}

.search-panel,
.paper,
aside {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.search-panel {
  padding: 18px;
  margin-bottom: 22px;
}

.search-panel label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

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

button {
  border: 0;
  border-radius: 8px;
  padding: 11px 15px;
  background: var(--accent);
  color: white;
  cursor: pointer;
}

button:hover {
  background: var(--accent-strong);
}

button.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

button.secondary:hover {
  background: #eef2f7;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 22px;
  align-items: start;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.section-head h2 {
  margin: 0;
  font-size: 20px;
}

.section-head span {
  color: var(--muted);
}

.list,
.saved {
  display: grid;
  gap: 12px;
}

.paper {
  padding: 16px;
}

.paper h3 {
  margin-bottom: 8px;
  font-size: 18px;
  line-height: 1.35;
}

.meta,
.abstract,
.link {
  font-size: 14px;
}

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

.abstract {
  color: #344054;
  line-height: 1.55;
}

.link {
  color: var(--accent);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.summary {
  white-space: pre-wrap;
  margin: 14px 0 0;
  padding: 12px;
  border-radius: 8px;
  background: #f0f4fb;
  color: #253858;
}

aside {
  padding: 16px;
}

.saved-item {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.saved-item strong {
  display: block;
  margin-bottom: 6px;
}

.saved-item small {
  color: var(--muted);
}

@media (max-width: 820px) {
  .hero,
  .layout {
    display: block;
  }

  .status,
  aside {
    margin-top: 18px;
  }

  h1 {
    font-size: 36px;
  }

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