*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;width:100%;overflow:hidden;background:#05060a;color:#e7eef8;font-family:IBM Plex Mono,ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;-webkit-font-smoothing:antialiased;-webkit-user-select:none;user-select:none}#canvas{position:fixed;top:0;right:0;bottom:0;left:0;display:block;cursor:grab}#canvas.dragging{cursor:grabbing}#canvas.hovering{cursor:pointer}.hud{position:fixed;pointer-events:none;z-index:10}.hud>*{pointer-events:auto}.panel{top:18px;right:22px;width:260px;background:#0a0e1699;backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);border:1px solid rgba(140,168,210,.12);border-radius:10px;padding:14px 16px}.panel h3{margin:0 0 8px;font-family:Fraunces,Times New Roman,serif;font-style:italic;font-weight:400;font-size:20px;color:#f1f3f7;letter-spacing:-.005em}.panel .sub{font-size:10px;color:#6b7a92;text-transform:uppercase;letter-spacing:.18em;margin-bottom:12px}.panel .rows{display:flex;flex-direction:column;gap:7px}.panel .row{display:flex;justify-content:space-between;align-items:baseline;font-size:11px}.panel .row .k{color:#6b7a92;letter-spacing:.06em;text-transform:uppercase;font-size:9.5px}.panel .row .v{color:#d8e2f1;font-variant-numeric:tabular-nums}.panel .egroup{display:flex;flex-direction:column;gap:7px}.panel .egroup-hd{cursor:pointer;-webkit-user-select:none;user-select:none}.panel .egroup-hd:hover .k{color:#b8c4d8}.panel .egroup-hd .caret{display:inline-block;margin-right:6px;font-size:8px;transition:transform .15s ease}.panel .egroup.open .egroup-hd .caret{transform:rotate(90deg)}.panel .egroup-body{display:none;flex-direction:column;gap:7px;margin-left:3px;padding-left:9px;border-left:1px solid rgba(140,168,210,.14)}.panel .egroup.open .egroup-body{display:flex}.panel .empty{font-size:11px;color:#5e6c84;line-height:1.55;font-family:Fraunces,Times New Roman,serif;font-style:italic}.panel .bond-list{margin-top:12px;display:flex;flex-direction:column;gap:4px;font-size:10.5px}.panel .bond-list .b{display:flex;justify-content:space-between;color:#b8c4d8;padding:4px 0;border-top:1px solid rgba(140,168,210,.08)}.panel .bond-list .b .type{color:#6b7a92;font-size:9.5px;text-transform:uppercase;letter-spacing:.14em}.panel-actions{margin-top:14px;display:flex;gap:6px}.panel-actions button{flex:1;background:#ffffff0a;color:#b8c4d8;border:1px solid rgba(140,168,210,.14);padding:7px 9px;font:inherit;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;border-radius:6px;cursor:pointer}.panel-actions button:hover{background:#ffffff14;color:#f1f3f7}.panel-actions button.danger:hover{background:#ff50642e;color:#ffaab2;border-color:#ff50644d}.table-dock{bottom:18px;right:18px;display:flex;flex-direction:column-reverse;align-items:stretch;gap:6px}.table-dock .toggle-btn{background:#0a0e16b3;-webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);border:1px solid rgba(140,168,210,.14);border-radius:8px;color:#b8c4d8;padding:9px 14px;font:inherit;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;cursor:pointer;align-self:flex-end}.table-dock .toggle-btn:hover{background:#a0c8ff24;color:#f1f3f7;border-color:#a0c8ff66}.table-dock.collapsed .table,.table-dock.collapsed .hint{display:none}.table-dock .hint{font-size:10px;color:#6b7a92;letter-spacing:.22em;text-transform:uppercase;text-align:right}.table{display:grid;grid-template-columns:repeat(18,26px);grid-template-rows:repeat(7,28px) 8px repeat(2,28px);gap:2px;padding:8px;background:#0a0e168c;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(140,168,210,.1);border-radius:10px}.cell{grid-row:var(--row);grid-column:var(--col);background:#ffffff06;border:1px solid rgba(140,168,210,.1);border-radius:4px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;transition:background .12s,border-color .12s,transform .12s;position:relative}.cell:hover{background:#a0c8ff1f;border-color:#a0c8ff73;transform:translateY(-2px)}.cell .z{position:absolute;top:1px;left:3px;font-size:6.5px;color:#6b7a92}.cell .s{font-size:11px;color:#eaf0fa;font-weight:600;letter-spacing:.02em}.cell .e{position:absolute;bottom:1px;right:3px;font-size:6px;color:#5e6c84;font-variant-numeric:tabular-nums}.cell[data-noble="1"] .s{color:#8b94a7}.cell[data-noble="1"]{background:#ffffff03}.cell[data-metal="1"] .s{color:#ffd9a8}.cell[data-h="1"] .s{color:#cfe0ff}.cell[data-c="1"] .s{color:#cdb4ff}.cell[data-n="1"] .s{color:#a8cdff}.cell[data-o="1"] .s{color:#ffb0bd}.tweaks{position:fixed;bottom:18px;right:18px;width:252px;background:#0a0e16b3;backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);border:1px solid rgba(140,168,210,.14);border-radius:10px;z-index:11;font-size:11px;overflow:hidden;display:none}.tweaks.open{display:block}.tweaks-toggle{position:fixed;bottom:18px;left:18px;z-index:11;background:#0a0e16b3;-webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);border:1px solid rgba(140,168,210,.14);border-radius:8px;color:#b8c4d8;padding:9px 14px;font:inherit;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;cursor:pointer}.tweaks-toggle:hover{background:#a0c8ff24;color:#f1f3f7;border-color:#a0c8ff66}.tweaks .hd{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-bottom:1px solid rgba(140,168,210,.08)}.tweaks .hd b{font-family:Fraunces,Times New Roman,serif;font-style:italic;font-weight:400;font-size:15px;color:#f1f3f7;letter-spacing:-.005em}.tweaks .hd .x{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;background:transparent;color:#6b7a92;font-size:13px;cursor:pointer;width:22px;height:22px;border-radius:4px}.tweaks .hd .x:hover{background:#ffffff0f;color:#eaf0fa}.tweaks .bd{padding:4px 12px 14px;max-height:60vh;overflow-y:auto}.tweaks .sect{margin-top:12px;font-size:9px;color:#6b7a92;text-transform:uppercase;letter-spacing:.22em}.tweaks .row{display:flex;flex-direction:column;gap:5px;margin-top:8px}.tweaks .row.h{flex-direction:row;align-items:center;justify-content:space-between}.tweaks .row label{display:flex;justify-content:space-between;font-size:10.5px;color:#b8c4d8}.tweaks .row label .vv{color:#6b7a92;font-variant-numeric:tabular-nums}.tweaks input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:2px;background:#a0c8ff33;border-radius:1px;outline:none}.tweaks input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;border-radius:50%;background:#eaf0fa;border:0;cursor:pointer;box-shadow:0 0 8px #a0c8ff99}.tweaks input[type=range]::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:#eaf0fa;border:0;cursor:pointer}.tweaks .seg{display:flex;border:1px solid rgba(140,168,210,.14);border-radius:5px;overflow:hidden}.tweaks .seg button{flex:1;background:transparent;color:#8493ad;border:0;padding:6px 4px;font:inherit;font-size:10px;letter-spacing:.06em;text-transform:uppercase;cursor:pointer}.tweaks .seg button.on{background:#a0c8ff29;color:#f1f3f7}.tweaks .seg button:hover:not(.on){background:#ffffff0a;color:#d8e2f1}.tweaks .swatches{display:flex;gap:5px}.tweaks .sw{flex:1;height:24px;border-radius:4px;cursor:pointer;border:1px solid rgba(140,168,210,.14)}.tweaks .sw.on{box-shadow:0 0 0 1px #f1f3f7 inset;border-color:#f1f3f7}.tweaks .toggle{width:30px;height:16px;border-radius:8px;background:#8ca8d22e;cursor:pointer;position:relative;transition:background .12s}.tweaks .toggle:after{content:"";position:absolute;top:2px;left:2px;width:12px;height:12px;border-radius:50%;background:#d8e2f1;transition:transform .12s}.tweaks .toggle.on{background:#6ed4ff73}.tweaks .toggle.on:after{transform:translate(14px);background:#f1f3f7}.tweaks .btn-row{display:flex;gap:6px;margin-top:10px}.tweaks .btn-row button{flex:1;background:#ffffff0a;color:#b8c4d8;border:1px solid rgba(140,168,210,.14);padding:7px;font:inherit;font-size:10px;letter-spacing:.06em;text-transform:uppercase;border-radius:5px;cursor:pointer}.tweaks .btn-row button:hover{background:#ffffff14;color:#f1f3f7}.spawn-cursor{position:fixed;pointer-events:none;z-index:100;padding:4px 10px;background:#0a0e16d9;border:1px solid rgba(160,200,255,.4);border-radius:4px;font-size:11px;letter-spacing:.08em;color:#f1f3f7;transform:translate(12px,12px);display:none}.spawn-cursor.on{display:block}.help{position:fixed;top:18px;left:50%;transform:translate(-50%);font-size:10px;color:#6b7a92;letter-spacing:.16em;text-transform:uppercase;pointer-events:none}.help b{color:#b8c4d8;font-weight:500}.panel .dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:7px;vertical-align:middle;position:relative;top:-1px}.panel .dot.proton{background:#ff6b88;box-shadow:0 0 5px #ff6b8899}.panel .dot.neutron{background:#d6d2c8}.panel .dot.shell1{background:#9fd6ff;box-shadow:0 0 5px #9fd6ff80}.panel .dot.shell2{background:#b08aff;box-shadow:0 0 5px #b08aff80}.panel .dot.shell3{background:#ff7eb6;box-shadow:0 0 5px #ff7eb680}.panel .dot.shell4{background:#ffd47e;box-shadow:0 0 5px #ffd47e80}@media(max-width:768px){.help{display:none}.table-dock.collapsed{top:12px;left:12px;right:12px;bottom:auto;flex-direction:column;align-items:center}.table-dock.collapsed .toggle-btn{align-self:center;padding:7px 14px}.table-dock:not(.collapsed){top:0;right:0;bottom:0;left:0;flex-direction:column;align-items:stretch;gap:0;padding:52px 6px 6px;background:#0a0e166b;backdrop-filter:blur(24px) saturate(160%);-webkit-backdrop-filter:blur(24px) saturate(160%);overflow:hidden}.table-dock:not(.collapsed) .hint{display:none}.table-dock:not(.collapsed) .toggle-btn{position:absolute;top:14px;right:14px;align-self:auto;z-index:1}.table-dock .hint{text-align:center}.table{padding:6px;gap:2px;width:100%;max-width:none;flex:1;background:#0a0e1640}.cell .s{font-size:12px}.cell .z{font-size:7px;top:1px;left:3px}.cell .e{display:none}.panel{top:auto;bottom:0;left:0;right:0;width:100%;background:#0a0e166b;backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);border:none;border-top:1px solid rgba(140,168,210,.12);border-radius:0;padding:14px 18px 18px;cursor:pointer}.panel h3{font-size:18px;margin:0;display:flex;align-items:center;justify-content:space-between}.panel h3:after{content:"▾";color:#6b7a92;font-style:normal;font-size:14px;margin-left:12px;transition:transform .16s}.panel .sub,.panel .rows,.panel .empty{display:none}.panel.expanded{max-height:60vh;overflow-y:auto}.panel.expanded h3{margin-bottom:8px}.panel.expanded h3:after{transform:rotate(180deg)}.panel.expanded .sub{display:block;margin-bottom:8px}.panel.expanded .rows{display:flex;flex-direction:column;gap:7px}.panel.expanded .empty{display:block}.panel.expanded .row{font-size:11.5px}.panel.expanded .row .k{font-size:10px}}@media(max-width:768px)and (orientation:portrait){.table{direction:rtl;grid-template-columns:repeat(7,1fr) 6px repeat(2,1fr);grid-template-rows:repeat(18,minmax(0,1fr))}.cell{grid-row:var(--col);grid-column:var(--row);direction:ltr}.cell .s{font-size:13px}}@media(max-width:768px)and (orientation:landscape){.table{grid-template-columns:repeat(18,minmax(0,1fr));grid-template-rows:repeat(7,minmax(0,1fr)) 6px repeat(2,minmax(0,1fr))}.cell .s{font-size:11px}.panel{top:auto;bottom:0;left:0;right:0;width:100%;background:#0a0e166b;backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);border:none;border-top:1px solid rgba(140,168,210,.12);border-radius:0;padding:14px 18px 18px;cursor:pointer}.panel h3{font-size:18px;margin:0;display:flex;align-items:center;justify-content:space-between}.panel h3:after{content:"▾";color:#6b7a92;font-style:normal;font-size:14px;margin-left:12px;transition:transform .16s}.panel .sub,.panel .rows,.panel .empty{display:none}.panel.expanded{max-height:60vh;overflow-y:auto}.panel.expanded h3{margin-bottom:8px}.panel.expanded h3:after{transform:rotate(180deg)}.panel.expanded .sub{display:block;margin-bottom:8px}.panel.expanded .rows{display:flex;flex-direction:column;gap:7px}.panel.expanded .empty{display:block}.panel.expanded .row{font-size:11.5px}.panel.expanded .row .k{font-size:10px}}