//```css. Here's `style.css`:
:root {
  --bg: #0a0a0f;
  --card: #13131a;
  --card-hover: #1a1a24;
  --border: #2a2a3a;
  --border-active: #f6821c;
  --text: #e0e0e8;
  --muted: #8888a0;
  --accent: #f6821c;
  --accent-dim: rgba(246,130,28,0.15);
  --green: #4ade80;
  --red: #f87171;
  --blue: #60a5fa;
  --purple: #a78bfa;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 16px;
}
.header {
  max-width: 1400px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.logo {
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}
.logo-sub {
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.search-bar {
  flex: 1;
  min-width: 300px;
  display: flex;
  gap: 8px;
}
.search-bar input {
  flex: 1;
  padding: 10px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}
.search-bar input:focus { border-color: var(--accent); }
.search-bar button {
  padding: 10px 20px;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}
.search-bar button:hover { opacity: 0.85; }
.search-bar button:disabled { opacity: 0.4; cursor: not-allowed; }
.toolbar {
  max-width: 1400px;
  margin: 0 auto 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.tool-btn {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tool-btn:hover { border-color: var(--accent); color: var(--text); }
.tool-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.tool-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.tool-spacer { flex: 1; }
.examples { display: flex; gap: 6px; flex-wrap: wrap; }
.example-chip {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}
.example-chip:hover { border-color: var(--accent); color: var(--text); }
.grid-container {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  min-height: 200px;
}
.grid { position: relative; width: 100%; }
.muuri-item { position: absolute; margin: 8px; z-index: 1; }
.muuri-item-dragging { z-index: 100; }
.muuri-item-releasing { z-index: 50; }
.muuri-item-hidden { z-index: 0; }
.muuri-item-placeholder {
  margin: 8px;
  opacity: 0.3;
  background: var(--border);
  border-radius: 12px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  height: 100%;
  overflow: hidden;
  transition: border-color 0.2s, background 0.2s;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
}
.card:hover { border-color: var(--border-active); background: var(--card-hover); }
.card.selected { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-dim); }
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card-type-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-summary { background: rgba(96,165,250,0.15); color: var(--blue); }
.badge-citation { background: rgba(167,139,250,0.15); color: var(--purple); }
.badge-crossref { background: var(--accent-dim); color: var(--accent); }
.badge-principle { background: rgba(74,222,128,0.15); color: var(--green); }
.badge-trail { background: rgba(96,165,250,0.15); color: var(--blue); }
.badge-meta { background: var(--border); color: var(--muted); }
.badge-blocked { background: rgba(248,113,113,0.15); color: var(--red); }
.card-actions { display: flex; gap: 4px; opacity: 0; transition: opacity 0.2s; }
.card:hover .card-actions { opacity: 1; }
.card-action {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
  transition: color 0.2s;
}
.card-action:hover { color: var(--accent); }
.card-content {
  font-size: 0.85rem;
  line-height: 1.5;
  flex: 1;
  overflow-y: auto;
  max-height: 300px;
}
.card-content::-webkit-scrollbar { width: 4px; }
.card-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.card-source { color: var(--accent); font-size: 0.75rem; font-weight: 600; }
.card-citation-source { color: var(--blue); font-weight: 600; font-size: 0.75rem; }
.card-footer { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.card-chip { background: var(--border); padding: 2px 8px; border-radius: 4px; font-size: 0.68rem; color: var(--muted); }
.card-chip.green { color: var(--green); }
.card-chip.accent { color: var(--accent); }
.loading-overlay { text-align: center; padding: 60px; color: var(--muted); }
.spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }
.health { display: flex; align-items: center; gap: 6px; font-size: 0.72rem; color: var(--muted); white-space: nowrap; }
.health-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); }
.empty-state { text-align: center; padding: 80px 20px; color: var(--muted); }
.empty-state h2 { font-size: 1.2rem; margin-bottom: 8px; color: var(--text); }
.empty-state p { font-size: 0.85rem; max-width: 400px; margin: 0 auto; line-height: 1.6; }
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}
.modal h2 { font-size: 1.1rem; margin-bottom: 16px; }
.export-format { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.export-btn {
  background: var(--border);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}
.export-btn:hover { border-color: var(--accent); color: var(--accent); }
.export-preview {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-family: monospace;
  font-size: 0.75rem;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
  overflow-y: auto;
  color: var(--muted);
}
.modal-close { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 1.2rem; float: right; }
.modal-close:hover { color: var(--text); }
.card.combined { border-style: dashed; border-color: var(--purple); }
.card.distilled { border-color: var(--green); }
.card.templated { border-color: var(--blue); }
.pref-bar {
  max-width: 1400px;
  margin: 0 auto 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.72rem;
  color: var(--muted);
  flex-wrap: wrap;
}
.pref-label { text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.pref-chip {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.pref-chip .pref-value { color: var(--accent); font-weight: 600; }