:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #555555;
  --border: #e5e5e5;
  --badge-border: #cccccc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --text: #e6e6e6;
    --muted: #a0a0a0;
    --border: #2a2d33;
    --badge-border: #3a3f47;
  }
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
}
.container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 0 16px;
}

h1 {
  margin-bottom: 24px;
}

.controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

input, select {
  padding: 8px 10px;
  font-size: 14px;
}

.result {
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.title {
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
}

.meta {
  font-size: 13px;
  color: var(--muted);
  margin: 4px 0 6px;
}

.badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.badge {
  font-size: 11px;
  padding: 2px 6px;
  border: 1px solid var(--badge-border);
  border-radius: 4px;
}

.tags {
  font-size: 12px;
  color: #666;
  margin-bottom: 6px;
}

.abstract {
  font-size: 13px;
  color: color-mix(in srgb, var(--text) 85%, transparent);
  margin-top: 6px;
  display: none;
}

.abstract-toggle {
  font-size: 12px;
  cursor: pointer;
  color: var(--text);
  text-decoration: underline;
}

.collections {
  font-size: 12px;
  color: #888;
  margin-bottom: 6px;
}

.collections {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

button {
  margin: 14px 0 24px;
  background: #fff;
  color: #000;
  border: 1px solid #000;
}
button:hover {
  background: #000;
  color: #fff;
}

.header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.logo {
  height: 96px;
  width: auto;
}


.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid var(--badge-border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
}

.to-top:hover {
  filter: brightness(0.95);
}