/* ─── Document archive ────────────────────────────────────── */
.filter-btn {
  padding: .45rem 1.2rem;
  border: 2px solid var(--border);
  border-radius: 100px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: all var(--transition);
}

.filter-btn:hover { border-color: var(--gold); color: var(--gold); }
.filter-btn.active { background: var(--gold); border-color: var(--gold); color: var(--navy); }

.doc-grid { display: flex; flex-direction: column; gap: .85rem; }
.doc-card-wrapper { display: flex; flex-direction: column; }

.doc-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.4rem;
  overflow: hidden;
  padding: 1.2rem 1.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  color: inherit;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.doc-card::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--gold), var(--gold-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.doc-card:hover { transform: translateX(4px); box-shadow: var(--shadow-md); border-color: rgba(201,169,110,.5); }
.doc-card:hover::before { opacity: 1; }

.doc-icon {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: rgba(201,169,110,.12);
  color: var(--gold-dark);
}

.doc-info { display: flex; flex: 1; flex-direction: column; gap: .25rem; }
.doc-type-badge { color: var(--gold-dark); font-size: .68rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.doc-title { margin: 0; color: var(--navy); font-family: var(--font-display); font-size: 1.15rem; line-height: 1.25; }
.doc-year { color: var(--text-muted); font-size: .78rem; font-weight: 500; }
.doc-arrow { flex-shrink: 0; color: var(--gold); opacity: 0; transform: translateX(-6px); transition: opacity var(--transition), transform var(--transition); }
.doc-card:hover .doc-arrow { opacity: 1; transform: translateX(0); }
.doc-card-wrapper.hidden { display: none; }

@media (max-width: 600px) {
  .doc-card { gap: 1rem; padding: 1rem 1.1rem; }
  .doc-icon { width: 42px; height: 42px; }
  .doc-title { font-size: 1rem; }
}