._lesson_99mvm_1{--atom-red:#ce4054;--atom-blue:#238feb;--atom-grey:#969ca5;--atom-accent:#927951;color:var(--foreground);padding-bottom:60px}._header_99mvm_9{max-width:860px;padding:48px 0 34px}._eyebrow_99mvm_13{font:11px var(--font-mono,monospace);letter-spacing:.15em;color:var(--atom-accent);margin-bottom:17px}._header_99mvm_9 h1{font:400 clamp(36px, 4.5vw, 60px)/1.12 var(--font-serif,Georgia, serif);letter-spacing:-.035em;margin:0 0 22px}._header_99mvm_9 p,._section_99mvm_25>p{max-width:920px;color:var(--muted-foreground);font-size:16px;line-height:1.9}._jump_99mvm_31{color:var(--foreground);border-bottom:1px solid var(--atom-accent);margin-top:16px;padding:5px 0;font-size:13px;display:inline-block}._section_99mvm_25{margin:38px 0 64px;scroll-margin-top:90px}._section_99mvm_25 h2{font:400 clamp(24px, 2.8vw, 35px)/1.3 var(--font-serif,Georgia, serif);letter-spacing:-.025em;align-items:baseline;gap:17px;margin:0 0 20px;display:flex}._section_99mvm_25 h2>span{font:11px var(--font-mono,monospace);color:var(--atom-accent)}._section_99mvm_25>p{margin:0 0 20px}._section_99mvm_25 h3{margin:0 0 12px;font-size:17px;font-weight:500}._history_99mvm_63{border-block:1px solid var(--border);grid-template-columns:repeat(3,minmax(0,1fr));margin-top:30px;display:grid}._history_99mvm_63>div{padding:10px 27px 24px}._history_99mvm_63>div+div{border-left:1px solid var(--border)}._historyDrawing_99mvm_75{width:150px;height:116px;color:var(--muted-foreground);margin:8px auto 12px;display:block}._history_99mvm_63 small{font:11px var(--font-mono,monospace);color:var(--atom-accent);margin-bottom:10px;display:block}._history_99mvm_63 p{color:var(--muted-foreground);margin:0;font-size:14px;line-height:1.85}._particles_99mvm_94{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:28px 0;display:grid}._particle_99mvm_94{background:var(--card);border:1px solid var(--border);border-radius:8px;grid-template-columns:48px 1fr;gap:16px;padding:24px;display:grid}._particleBall_99mvm_109{color:#fff;border-radius:50%;place-items:center;width:43px;height:43px;font-size:20px;display:grid;box-shadow:inset -6px -5px 10px #0003,inset 4px 3px 10px #fff5}._particleBall_99mvm_109._electron_99mvm_121{width:25px;height:25px;margin:9px;font-size:17px}._proton_99mvm_127{background:var(--atom-red)}._neutron_99mvm_130{background:var(--atom-grey)}._electron_99mvm_121{background:var(--atom-blue)}._particle_99mvm_94 h3{margin:2px 0 5px}._particle_99mvm_94 p{color:var(--muted-foreground);margin:0;font-size:12px}._particle_99mvm_94 dl{border-top:1px solid var(--border);grid-column:1/-1;justify-content:space-between;margin:0;padding-top:18px;display:flex}._particle_99mvm_94 dt{color:var(--muted-foreground);margin-bottom:8px;font-size:11px}._particle_99mvm_94 dd{min-height:40px;margin:0}._note_99mvm_161{color:var(--muted-foreground);line-height:1.8;font-size:13px!important}._explorer_99mvm_166{border:1px solid var(--border);background:var(--card);border-radius:12px;grid-template-columns:minmax(0,1fr) 290px;scroll-margin-top:10px;display:grid;overflow:hidden}._viewport_99mvm_175{flex-direction:column;min-width:0;display:flex}._viewerTitle_99mvm_180{justify-content:space-between;align-items:center;gap:16px;padding:20px 24px 0;display:flex}._viewerTitle_99mvm_180>div{align-items:baseline;gap:13px;display:flex}._viewerTitle_99mvm_180 span{font:400 32px var(--font-serif,Georgia, serif)}._viewerTitle_99mvm_180 strong{font-size:14px;font-weight:400}._viewerTitle_99mvm_180 small{letter-spacing:.03em;color:var(--muted-foreground);font-size:11px}._canvas_99mvm_204{flex:auto;height:490px;min-height:440px}._canvas_99mvm_204 .model-stage{background:0 0;border-radius:0;height:100%;min-height:0}._canvas_99mvm_204 .model-stage canvas{touch-action:none;width:100%;height:100%;display:block;position:relative}._viewerControls_99mvm_222{border-top:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:10px;padding:15px 20px;display:flex}._viewerControls_99mvm_222 button{border:1px solid var(--border);cursor:pointer;background:var(--background);color:var(--foreground);border-radius:5px;align-items:center;gap:7px;padding:8px 10px;font-size:12px;display:flex}._viewerControls_99mvm_222>span{color:var(--muted-foreground);margin-left:auto;font-size:11px}._details_99mvm_247{border-left:1px solid var(--border);min-width:0;padding:26px 22px}._counts_99mvm_252{gap:17px;display:grid}._counts_99mvm_252>div{align-items:center;gap:12px;display:flex}._counts_99mvm_252 i{border-radius:50%;flex:none;width:12px;height:12px}._counts_99mvm_252 span{font-size:13px}._counts_99mvm_252 strong{font:400 25px var(--font-mono,monospace);margin-left:auto}._charge_99mvm_274{border-bottom:1px solid var(--border);margin-bottom:23px;padding:22px 0}._charge_99mvm_274 p{color:var(--muted-foreground);margin:10px 0 0;font-size:12px;line-height:1.65}._details_99mvm_247 h3{margin:0 0 15px;font-size:13px}._shells_99mvm_289{gap:5px;display:grid}._shells_99mvm_289 button{text-align:left;cursor:pointer;color:var(--foreground);background:0 0;border:1px solid #0000;border-radius:4px;grid-template-columns:56px 1fr 25px;align-items:center;gap:10px;padding:8px 7px;font-size:12px;display:grid}._shells_99mvm_289 button[aria-pressed=true]{border-color:var(--atom-blue);background:#238feb12}._shellBar_99mvm_311{background:#8493a51c;height:3px}._shellBar_99mvm_311 i{background:var(--atom-blue);min-width:3px;height:100%;display:block}._shells_99mvm_289 b{text-align:right;font-weight:500}._shellSum_99mvm_325{flex-wrap:wrap;align-items:baseline;gap:8px;margin-top:17px;font-size:12px;display:flex}._shellSum_99mvm_325>span{color:var(--muted-foreground);font-size:11px}._isotope_99mvm_337{border:1px solid var(--border);border-radius:8px;grid-template-columns:145px 1fr;gap:28px;margin-top:14px;padding:22px 24px;display:grid}._isotope_99mvm_337 small{color:var(--muted-foreground);font:10px var(--font-mono,monospace);letter-spacing:.06em;margin-bottom:9px;display:block}._isotope_99mvm_337 strong{font-size:19px;font-weight:500}._isotope_99mvm_337 p{color:var(--muted-foreground);margin:0;font-size:13px;line-height:1.85}._section_99mvm_25 ._scaleNote_99mvm_363{margin:12px 2px 38px;font-size:12px;line-height:1.7}._tableHeading_99mvm_368{justify-content:space-between;align-items:center;gap:24px;margin-bottom:20px;display:flex}._tableHeading_99mvm_368 h3{font:400 24px var(--font-serif,Georgia, serif);margin:0 0 6px}._tableHeading_99mvm_368 p{color:var(--muted-foreground);margin:0;font-size:13px}._search_99mvm_384{border-bottom:1px solid var(--border);color:var(--muted-foreground);align-items:center;gap:8px;padding:9px 0;display:flex}._search_99mvm_384 input{width:210px;min-width:0;color:var(--foreground);background:0 0;border:0;outline:none;font-size:12px}._tableScroll_99mvm_401{scrollbar-width:thin;margin-bottom:20px;padding-bottom:14px;overflow-x:auto}._table_99mvm_368{grid-template-rows:17px repeat(7,64px) 10px repeat(2,64px);grid-template-columns:repeat(18,minmax(0,1fr));gap:5px;min-width:780px;display:grid}._groupNumber_99mvm_414{font:10px var(--font-mono,monospace);color:var(--muted-foreground);text-align:center}._element_99mvm_419{--tile:#4e8599;border:1px solid color-mix(in srgb, var(--tile) 25%, var(--border));border-top:2px solid var(--tile);text-align:left;cursor:pointer;background:color-mix(in srgb, var(--tile) 7%, var(--card));min-width:0;color:var(--foreground);border-radius:3px;flex-direction:column;justify-content:center;align-items:flex-start;padding:4px 5px;transition:background .15s,border-color .15s,opacity .15s;display:flex}._element_99mvm_419 small{font:9px var(--font-mono,monospace);opacity:.65}._element_99mvm_419 strong{margin:3px 0 2px;font-size:clamp(14px,1.55vw,21px);font-weight:500;line-height:1.2}._element_99mvm_419>span{white-space:nowrap;text-overflow:ellipsis;opacity:.65;width:100%;font-size:8px;line-height:1.2;display:block;overflow:hidden}:is(._element_99mvm_419:hover,._element_99mvm_419:focus-visible){background:color-mix(in srgb, var(--tile) 22%, var(--card));outline:2px solid var(--tile);outline-offset:1px;z-index:1}._element_99mvm_419[aria-pressed=true]{border-color:var(--atom-blue);box-shadow:inset 0 0 0 1px var(--atom-blue);background:#238feb20}._element_99mvm_419[data-match=false]{opacity:.24}._element_99mvm_419[data-family=Alkali\ metal]{--tile:#b2775f}._element_99mvm_419[data-family="Alkaline earth metal"]{--tile:#b39550}._element_99mvm_419[data-family=Transition\ metal]{--tile:#8d848a}._element_99mvm_419[data-family=Metalloid]{--tile:#648f7f}._element_99mvm_419[data-family=Nonmetal]{--tile:#609993}._element_99mvm_419[data-family=Halogen]{--tile:#5e8da9}._element_99mvm_419[data-family=Noble\ gas]{--tile:#8b77ae}._element_99mvm_419[data-family=Lanthanide]{--tile:#9c7b72}._element_99mvm_419[data-family=Actinide]{--tile:#998366}._tableKey_99mvm_501{color:var(--muted-foreground);grid-area:2/4/4/12;place-self:center;gap:7px;font-size:11px;display:grid}._tableKey_99mvm_501 strong{color:var(--foreground);font-size:13px;font-weight:500}._seriesPlaceholder_99mvm_516{color:var(--muted-foreground);text-align:center;border:1px dashed var(--border);border-radius:4px;place-content:center;font-size:9px;display:grid}._seriesPlaceholder_99mvm_516 span{margin-top:7px;font-size:15px;display:block}._seriesLabel_99mvm_530{text-align:right;color:var(--muted-foreground);grid-column:1/3;align-self:center;padding-right:10px;font-size:10px}._searchCount_99mvm_538{font-size:13px!important}._next_99mvm_541{border-top:1px solid var(--border);padding-top:35px}._nextLinks_99mvm_545{flex-wrap:wrap;gap:18px 36px;margin-top:26px;display:flex}._nextLinks_99mvm_545 a{border-bottom:1px solid var(--border);align-items:center;gap:8px;padding-bottom:7px;font-size:13px;display:flex}._sources_99mvm_559{color:var(--muted-foreground);border-top:1px solid var(--border);flex-wrap:wrap;gap:12px 22px;padding-top:22px;font-size:11px;display:flex}._sources_99mvm_559 a{text-underline-offset:3px;text-decoration:underline}@media (max-width:1000px){._explorer_99mvm_166{grid-template-columns:minmax(0,1fr) 260px}._details_99mvm_247{padding:22px 16px}._viewerControls_99mvm_222>span{width:100%;margin:4px 0 0}._particles_99mvm_94{gap:12px}._particle_99mvm_94{gap:10px;padding:18px}._table_99mvm_368{gap:4px}}@media (max-width:700px){._header_99mvm_9{padding-top:30px}._history_99mvm_63{grid-template-columns:1fr}._history_99mvm_63>div{grid-template-columns:104px 1fr;gap:6px 18px;padding:20px 0;display:grid}._history_99mvm_63>div+div{border-left:0;border-top:1px solid var(--border)}._historyDrawing_99mvm_75{grid-row:1/4;align-self:center;width:104px;height:100px;margin:0}._history_99mvm_63 small,._history_99mvm_63 h3{margin:0}._history_99mvm_63 p{grid-column:2}._particles_99mvm_94{grid-template-columns:1fr;gap:10px}._particle_99mvm_94{grid-template-columns:48px 1fr 1.1fr;align-items:center;padding:20px}._particle_99mvm_94 dl{border:0;grid-column:3;gap:12px;padding:0}._particle_99mvm_94 dd{min-height:20px}._explorer_99mvm_166{grid-template-columns:1fr}._canvas_99mvm_204{height:370px;min-height:370px}._details_99mvm_247{border-left:0;border-top:1px solid var(--border);padding:22px}._counts_99mvm_252{grid-template-columns:repeat(3,1fr);gap:10px}._counts_99mvm_252>div{flex-wrap:wrap;gap:8px}._counts_99mvm_252 strong{width:100%;margin:0;font-size:26px}._charge_99mvm_274{padding:18px 0}._isotope_99mvm_337{grid-template-columns:1fr;gap:14px;padding:20px}._tableHeading_99mvm_368{flex-direction:column;align-items:flex-start;gap:14px}._search_99mvm_384,._search_99mvm_384 input{width:100%}._tableKey_99mvm_501{font-size:10px}._section_99mvm_25{margin-bottom:46px}._section_99mvm_25 h2{gap:12px}._viewerTitle_99mvm_180{padding:17px 20px 0}._element_99mvm_419 strong{font-size:18px}}@media (prefers-reduced-motion:reduce){._element_99mvm_419{transition:none}}