/* ===== QuickQuote · Articles Page ===== */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 20px;
  margin-top: 10px;
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow .15s;
}
.article-card:hover { box-shadow: var(--shadow); }

.article-icon {
  font-size: 32px;
  margin-bottom: 8px;
  line-height: 1;
}

.article-card h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 14px;
}

/* Reference Tables */
.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.ref-table th {
  background: var(--brand-light);
  padding: 8px 10px;
  text-align: left;
  font-weight: 600;
  color: var(--brand);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .3px;
  border-bottom: 2px solid var(--brand-muted);
}
.ref-table td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
}
.ref-table tbody tr:hover { background: #fafbfd; }
.ref-table td:last-child { font-weight: 500; font-variant-numeric: tabular-nums; }

/* Formula List */
.formula-list { display: flex; flex-direction: column; gap: 16px; }
.formula-item {
  padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--brand-light); border-left: 3px solid var(--accent);
}
.formula-item strong { display: block; font-size: 13px; font-weight: 600; color: var(--brand); margin-bottom: 4px; }
.formula-item code {
  display: block; padding: 6px 10px; margin: 4px 0;
  background: var(--brand); color: #e8eaf6; border-radius: 4px;
  font-size: 12px; font-family: 'Consolas','Courier New',monospace;
  word-break: break-all;
}
.formula-item p { font-size: 12px; color: var(--text-secondary); margin: 4px 0 0; line-height: 1.5; }

/* Responsive */
@media (max-width: 768px) {
  .articles-grid { grid-template-columns: 1fr; }
  .article-card { padding: 18px; }
}
@media (max-width: 640px) {
  .ref-table { font-size: 12px; }
  .ref-table th, .ref-table td { padding: 6px 8px; }
}