/* ═══════════════════════════════════════════════════
   PERIODIC TABLE OVERLAY — Shared Styles
   EnjoyChemistry — Prefix: pt-ref-
   Include on any page that uses PTOverlay.open()
   ═══════════════════════════════════════════════════ */

.pt-ref-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:9999;display:flex;align-items:center;justify-content:center;padding:1rem;backdrop-filter:blur(2px)}
.pt-ref-panel{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:940px;max-height:92vh;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--border)}
.pt-ref-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.pt-ref-header h2{font-size:1.1rem;font-weight:700;color:var(--text);margin:0}
.pt-ref-scroll{overflow:auto;padding:16px 20px;flex:1}
.pt-ref-grid{display:inline-grid;gap:2px}
.pt-ref-la{margin-top:12px}
.pt-ref-cell{width:48px;height:54px;border-radius:4px;display:flex;align-items:center;justify-content:center;cursor:pointer;border:1.5px solid transparent;transition:all 0.15s;position:relative;flex-direction:column}
.pt-ref-cell:hover{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-glow);transform:scale(1.06);z-index:2}
.pt-ref-cell.pt-ref-selected{border-color:var(--primary)!important;box-shadow:0 0 0 2px var(--primary-glow)!important}
.pt-ref-z{position:absolute;bottom:3px;left:4px;font-size:8px;color:var(--text-muted);font-weight:600}
.pt-ref-sym{font-size:15px;font-weight:700;color:var(--text)}
.pt-ref-marker{cursor:default;pointer-events:none}
.pt-ref-tooltip{position:fixed;z-index:10000;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);padding:6px 12px;font-size:0.8rem;color:var(--text);pointer-events:none;transform:translateX(-50%);white-space:nowrap;line-height:1.5}
.pt-ref-detail{padding:14px 20px;border-top:1px solid var(--border);background:var(--bg);min-height:60px}
.pt-ref-detail-inner{display:flex;align-items:center;gap:16px}
.pt-ref-detail-sym{font-size:2rem;font-weight:700;color:var(--primary);min-width:50px;text-align:center}
.pt-ref-detail-name{font-size:1.05rem;font-weight:600;color:var(--text);text-transform:capitalize}
.pt-ref-detail-row{font-size:0.85rem;color:var(--text-muted)}.pt-ref-detail-row strong{color:var(--text)}