Beta 7

New columns and title popups
Click scroll

assets/css/table.css

@@ -424,7 +424,81 @@
 /* "Tight" header — for columns whose body content is narrower than
    the default tracked-out header would suggest (Air, Pcpt). Reducing
    the letter-spacing shrinks the heading's natural width so it stops
-   driving the column wider than the body needs. Right-aligned values
+   driving the column wider than the body needs. Right-aligned values */
+.utci-table th.utci-tight-head {
+  letter-spacing: 0.04em;
+}
+
+/* ── CLICKABLE COLUMN HEADERS ───────────────────────────────────────────
+   .col-info-th makes every <th> show a pointer cursor and a subtle hover
+   tint to signal it can be clicked for a description popup. */
+.utci-table th.col-info-th {
+  cursor: pointer;
+  transition: background 0.15s;
+}
+.utci-table th.col-info-th:hover {
+  background: #e8d8a8;
+}
+
+/* ── COLUMN DESCRIPTION POPUP ───────────────────────────────────────────
+   Fixed-position card that appears below a clicked column header.
+   JS sets left/top via inline style (centred on the clicked th). */
+.col-info-popup {
+  position: fixed; /* set by JS — stays in viewport regardless of scroll */
+  z-index: 200;
+  width: 260px;
+  background: #fffcf2;
+  border: 1.5px solid #c9b08a;
+  border-radius: 6px;
+  box-shadow: 0 4px 16px rgba(74,52,32,0.18);
+  padding: 14px 16px 16px;
+  pointer-events: all;
+}
+/* Arrow points DOWN toward the column header */
+.col-info-popup::after {
+  content: '';
+  position: absolute;
+  bottom: -7px;
+  left: var(--arrow-left, 50%);
+  width: 12px;
+  height: 12px;
+  background: #fffcf2;
+  border-right: 1.5px solid #c9b08a;
+  border-bottom: 1.5px solid #c9b08a;
+  transform: rotate(45deg);
+}
+.col-info-title {
+  display: block;
+  font-family: Manrope, sans-serif;
+  font-size: 12px;
+  font-weight: 700;
+  color: #4a3420;
+  margin-bottom: 6px;
+  text-transform: none;
+  letter-spacing: 0;
+}
+.col-info-desc {
+  font-family: Manrope, sans-serif;
+  font-size: 12px;
+  color: #6b4f2a;
+  line-height: 1.5;
+  margin: 0;
+}
+.col-info-close {
+  position: absolute;
+  top: 6px;
+  right: 8px;
+  background: none;
+  border: none;
+  font-size: 16px;
+  color: #a08060;
+  cursor: pointer;
+  line-height: 1;
+  padding: 0 2px;
+}
+.col-info-close:hover {
+  color: #4a3420;
+}
    then sit with balanced visual padding on either side. */
 .utci-table th.utci-tight-head {
   letter-spacing: 0.04em;