body{background:var(--bg-page);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,Segoe UI,sans-serif}#root{width:100%;min-height:100vh}*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg-page:#f5f5f5;--surface:#fff;--control-bg:#f5f5f5;--control-hover-bg:#e8f0fe;--hover-bg-subtle:#f0f0f0;--text-primary:#1a1a1a;--text-strong:#333;--text-body:#444;--text-secondary:#555;--text-muted:#666;--text-faint:#686868;--text-dim:#6b6b6b;--text-ghost:#6e6e6e;--text-fainter:#707070;--border:#ddd;--border-subtle:#eee;--border-divider:#e0e0e0;--border-strong:#ccc;--label-hover-bg:#0000000f;--accent:#1565c0;--accent-2:#4a90e2;--accent-subtle:#1565c01f;--link:#1565c0;--danger-bg:#ffebee;--lecture-ink:#10151c;--lecture-halo:#ffc400;--focus-ring:#1565c0}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg-page:#14181e;--surface:#1c222b;--control-bg:#232a34;--control-hover-bg:#26303d;--hover-bg-subtle:#2a313c;--text-primary:#e6e8eb;--text-strong:#d4d8dd;--text-body:#c4cad3;--text-secondary:#b0b8c2;--text-muted:#9aa2ad;--text-faint:#9aa2ad;--text-dim:#949ca7;--text-ghost:#8f97a2;--text-fainter:#8c949f;--border:#2c333f;--border-subtle:#262c36;--border-divider:#2c333f;--border-strong:#3a424f;--label-hover-bg:#ffffff14;--accent:#1565c0;--accent-2:#4a90e2;--accent-subtle:#4a90e233;--link:#5b9be8;--danger-bg:#e573732e;--lecture-ink:#0b0f14;--lecture-halo:#ffd54f;--focus-ring:#7cb4ff}:root{background:var(--bg-page);color:var(--text-primary);--tile-size:44px;font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:13px}html,body{height:100%;overflow:hidden}body{background:var(--bg-page);color:var(--text-primary)}:where(button,a,input,[tabindex]):focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app{opacity:0;gap:0;height:100dvh;display:flex;overflow:hidden}.app--revealed{opacity:1;transition:opacity .25s ease-out}@media (prefers-reduced-motion:reduce){.app--revealed{transition:none}}@media (pointer:coarse){.app{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent}.search-input,.search-input:focus{-webkit-user-select:text;user-select:text}}.trends-sidebar{background:var(--surface);border-right:1px solid var(--border);flex-direction:column;gap:10px;width:164px;min-width:164px;padding:14px 10px;transition:background-color .2s,border-color .2s;display:flex}.sidebar-heading{text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);border-bottom:1px solid var(--border-subtle);padding-bottom:6px;font-size:11px;font-weight:700}.search-box{flex-direction:column;gap:4px;display:flex}.search-input{border:1px solid var(--border);background:var(--control-bg);width:100%;color:var(--text-primary);border-radius:5px;padding:5px 8px;font-family:inherit;font-size:11.5px}.search-input::placeholder{color:var(--text-ghost)}.search-input:focus{border-color:var(--accent-2);background:var(--surface)}.search-status{color:var(--text-faint);font-size:10px;line-height:1.3}.trend-buttons{flex-direction:column;gap:4px;display:flex}.trend-btn{background:var(--control-bg);border:1px solid var(--border);cursor:pointer;text-align:left;color:var(--text-primary);border-radius:5px;flex-direction:column;align-items:flex-start;padding:6px 8px;transition:background .15s,border-color .15s;display:flex}.trend-btn:hover{background:var(--control-hover-bg);border-color:var(--accent-2)}.trend-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}.trend-btn-label{font-size:11.5px;font-weight:600;line-height:1.3}.trend-btn-unit{opacity:.7;font-size:10px;line-height:1.2}.table-mode-title{color:var(--text-strong);letter-spacing:.02em;pointer-events:none;justify-content:center;align-items:center;font-size:15px;font-weight:700;display:flex}.sidebar-hint{color:var(--text-faint);font-size:10px;line-height:1.4}.sidebar-divider{border:none;border-top:1px solid var(--border-subtle);margin:0}.colorby-buttons{flex-direction:column;gap:4px;display:flex}.colorby-btn{background:var(--control-bg);border:1px solid var(--border);cursor:pointer;text-align:left;width:100%;color:var(--text-body);border-radius:5px;padding:6px 8px;font-size:11.5px;font-weight:600;transition:background .15s,border-color 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#0000001f;border-radius:6px;flex-direction:column;justify-content:center;align-items:center;width:80px;min-width:80px;height:80px;padding:4px;display:flex}.info-atomic-num{opacity:.7;align-self:flex-start;font-size:10px;font-weight:600}.info-big-symbol{font-size:32px;font-weight:700;line-height:1.1}.info-big-mass{opacity:.8;font-size:10px}.info-name-block{flex-direction:column;gap:4px;display:flex}.info-name{margin:0;font-size:22px;font-weight:700;line-height:1.1}.info-category-tag{color:#1a1a1a;border:1px solid #0000001f;border-radius:10px;width:fit-content;padding:2px 8px;font-size:11px;font-weight:600;display:inline-block}.info-discovery,.info-appearance{color:var(--text-secondary);font-size:11px;line-height:1.3}.info-wiki-link{color:var(--link);white-space:nowrap;font-weight:600;text-decoration:none}.info-wiki-link:hover{text-decoration:underline}.info-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:4px 10px;display:grid}.info-field{flex-direction:column;gap:1px;display:flex}.info-field--wide{grid-column:1/-1}.info-label{text-transform:uppercase;letter-spacing:.05em;color:var(--text-faint);font-size:10px;font-weight:600}.info-label-sub{text-transform:none;letter-spacing:0;font-size:9px;font-weight:400}.info-value{color:var(--text-primary);font-family:SF Mono,Fira Code,ui-monospace,monospace;font-size:12px;font-weight:500}.info-unit{color:var(--text-muted);font-size:11px}.table-wrapper{opacity:0;flex-direction:column;flex:1;gap:10px;min-height:0;display:flex;overflow:auto}.table-wrapper--settled{opacity:1;transition:opacity .25s}@media (prefers-reduced-motion:reduce){.table-wrapper--settled{transition:none}}@property --tile-size{syntax:"<length>";inherits:true;initial-value:44px}.periodic-grid{grid-template-columns:20px repeat(18, var(--tile-size));grid-template-rows:16px repeat(7, var(--tile-size)) 8px repeat(2, var(--tile-size));gap:2px;width:fit-content;transition:--tile-size .18s 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.15s}.group-label--btn:hover{color:var(--text-secondary);background:var(--label-hover-bg)}.group-label--btn.active{color:var(--accent);background:var(--accent-subtle)}.series-label{color:var(--text-dim);justify-content:flex-end;align-items:center;padding-right:4px;font-size:9.5px;font-style:italic;display:flex}.periodic-grid>div{min-height:0;position:relative;overflow:visible}.element-tile{background:var(--tile-bg,#e0e0e0);color:#1a1a1a;cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;touch-action:manipulation;width:100%;height:100%;font:inherit;text-align:left;appearance:none;border:1px solid #0000001a;border-radius:3px;flex-direction:column;justify-content:space-between;align-items:center;padding:1px 1px 2px;transition:box-shadow 80ms,transform 80ms;display:flex;position:relative}.element-tile:hover{z-index:2;transform:scale(1.08);box-shadow:0 0 0 2px #1565c0}.element-tile.selected{z-index:3;box-shadow:0 0 0 2.5px #1565c0,0 2px 8px #1565c04d}.element-tile.compared{z-index:3;box-shadow:0 0 0 2.5px #2e7d32,0 2px 8px #2e7d324d}.element-tile:focus-visible{z-index:6;outline-width:3px}.element-tile.dimmed{opacity:.55}.element-tile.missing{background:repeating-linear-gradient(-45deg,#e4e4e4 0 4px,#d2d2d2 4px 8px)}.app--locked .element-tile.selected{box-shadow:0 0 0 3px var(--lecture-ink), 0 0 0 6.5px var(--lecture-halo), 0 6px 18px #00000073;z-index:5;transform:scale(1.16)}.app--locked .element-tile.selected:hover{transform:scale(1.16)}.element-tile.ghost{border:1.5px dashed var(--border-strong);color:var(--text-ghost);background:0 0}.element-tile.ghost .tile-phase-dot{display:none}.tile-number{align-self:flex-start;width:100%;font-size:8.5px;font-weight:600;line-height:1}.phase-dot{border-radius:50%;flex-shrink:0;display:inline-block}.tile-phase-dot{width:5px;height:5px;position:absolute;top:3px;right:3px}.tile-symbol{font-size:16px;font-weight:700;line-height:1.1}.tile-bottom{white-space:nowrap;text-overflow:ellipsis;max-width:100%;font-size:9.5px;font-weight:600;line-height:1;overflow:hidden}.tile-bottom--config{letter-spacing:-.2px;font-size:8px;font-weight:500}.category-legend{flex-wrap:wrap;gap:6px 14px;padding:6px 0 2px;display:flex}.legend-item{align-items:center;gap:5px;display:flex}.legend-swatch--missing{background:repeating-linear-gradient(-45deg,#e4e4e4 0 2px,#c8c8c8 2px 4px)}.legend-swatch{border:1px solid #00000026;border-radius:2px;flex-shrink:0;width:12px;height:12px;display:inline-block}.legend-swatch--ghost{border:1.5px dashed var(--border-strong);background:0 0}.legend-label{color:var(--text-secondary);font-size:10.5px}.trend-legend{flex-direction:row;align-items:flex-start;gap:16px;padding:4px 0;display:flex}.trend-gradient-main{flex-direction:column;flex-shrink:1;gap:4px;width:min(400px,55%);display:flex}.trend-gradient-bar{border:1px solid #0000001a;border-radius:3px;width:100%;max-width:400px;height:12px}.trend-gradient-labels{max-width:400px;color:var(--text-muted);justify-content:space-between;font-size:10px;display:flex}.trend-gradient-labels span:nth-child(2){color:var(--text-strong);font-weight:600}.trend-missing-note{color:var(--text-faint);white-space:nowrap;flex-shrink:0;align-items:center;gap:5px;height:12px;font-size:10px;display:flex}.ion-legend{flex-wrap:wrap;gap:6px 12px;padding:4px 0;display:flex}.ion-legend-item{align-items:center;gap:5px;display:flex}.temp-bar{background:var(--surface);border:1px solid var(--border);border-radius:8px;flex-wrap:wrap;flex-shrink:0;align-items:center;gap:10px;padding:8px 14px;transition:background-color .2s,border-color .2s;display:flex}.temp-heading{text-transform:uppercase;letter-spacing:.07em;color:var(--text-muted);white-space:nowrap;font-size:11px;font-weight:700}.temp-range{min-width:120px;max-width:300px;height:4px;accent-color:var(--accent);cursor:pointer;flex:1}.temp-readout{white-space:nowrap;flex-shrink:0;width:150px;font-size:13px}.temp-secondary{color:var(--text-faint);margin-left:4px;font-size:11px}.phase-mode-btn{border:1px solid var(--border);background:var(--control-bg);cursor:pointer;white-space:nowrap;color:var(--text-secondary);border-radius:5px;padding:3px 7px;font-size:10.5px;font-weight:600;transition:background .12s,color .12s,border-color .12s}.phase-mode-btn:hover:not(.active){background:var(--control-hover-bg);border-color:var(--accent-2);color:var(--accent)}.phase-mode-btn.active{color:#fff;background:#e65100;border-color:#e65100}.unit-toggle{border:1px solid var(--border);border-radius:5px;flex-shrink:0;display:flex;overflow:hidden}.unit-btn{background:var(--control-bg);cursor:pointer;color:var(--text-secondary);border:none;padding:3px 7px;font-size:10.5px;font-weight:600;transition:background .12s,color .12s}.unit-btn+.unit-btn{border-left:1px solid var(--border)}.unit-btn.active{background:var(--accent);color:#fff}.unit-btn:hover:not(.active){background:var(--control-hover-bg);color:var(--accent)}.preset-unit{font-weight:400}.temp-presets{flex-wrap:wrap;gap:4px;display:flex}.temp-preset{border:1px solid var(--border);background:var(--control-bg);color:var(--text-secondary);cursor:pointer;white-space:nowrap;border-radius:4px;padding:3px 7px;font-size:10.5px;transition:background .12s}.temp-preset:hover{background:var(--control-hover-bg);border-color:var(--accent-2)}.temp-preset.active{background:var(--accent);color:#fff;border-color:var(--accent)}.phase-legend{flex-shrink:0;align-items:center;gap:10px;margin-left:auto;display:flex}.phase-dot-legend{border-top:1px solid var(--border-subtle);flex-wrap:wrap;align-items:center;gap:12px;padding:4px 2px 0;display:flex}.phase-legend-item{color:var(--text-secondary);align-items:center;gap:4px;font-size:10.5px;display:flex}.phase-legend-item .phase-dot{width:8px;height:8px}.bohr-svg{flex-shrink:0;display:block}@media (height<=880px){.main-content{gap:8px;padding-top:40px}.info-panel{padding:8px 14px 10px}.info-col{gap:7px}.info-hero{gap:12px}.info-symbol-block{width:58px;min-width:58px;height:58px}.info-big-symbol{font-size:24px}.info-name{font-size:17px}.bohr-svg{width:92px;height:92px}.info-grid{gap:2px 10px}.spectrum-strip{height:24px}.spectrum-axis{height:10px}}.spectrum-wrap{flex-direction:column;gap:1px;max-width:520px;display:flex}.spectrum-strip{border:1px solid var(--border);background:#000;border-radius:4px;width:100%;height:34px;display:block}.spectrum-axis{height:12px;color:var(--text-dim);font-size:9px;position:relative}.spectrum-axis span{position:absolute;transform:translate(-50%)}