/* metallic_bond.css — positive ions + delocalised electron sea (see metallic_bond.js). */
.mb2-svg { display: block; width: 100%; height: auto; background: radial-gradient(120% 100% at 50% 50%, rgba(56, 189, 248, 0.06), transparent 65%); }
.mb2-ion { fill: rgba(251, 191, 36, 0.2); stroke: #fbbf24; stroke-width: 1.8; }
.mb2-plus { fill: #fde68a; font-size: 13px; font-weight: 800; }
.mb2-e { fill: #38bdf8; stroke: #04233a; stroke-width: 0.6; filter: drop-shadow(0 0 3px rgba(56, 189, 248, 0.5)); }