@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/fef07dbb0973bf53-s.3p2_lha1f2xer.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/8a480f0b521d4e75-s.1qq4vpdcun5oj.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/53b9e256198e5412-s.390ncx5urfkfu.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/7178b3e590c64307-s.21jp631_3pja2.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/caa3a2e1cccd8315-s.p.0wgildi0cnwt9.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Geist Fallback;src:local(Arial);ascent-override:95.94%;descent-override:28.16%;line-gap-override:0.0%;size-adjust:104.76%}.geist_a71539c9-module__T19VSG__className{font-family:Geist,Geist Fallback;font-style:normal}.geist_a71539c9-module__T19VSG__variable{--font-geist-sans:"Geist", "Geist Fallback"}
@font-face{font-family:Geist Mono;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/5ce348bf30bf5439-s.31988l_ccedte.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Geist Mono;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/4fa387ec64143e14-s.2tuy5pz7dlieh.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Geist Mono;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/6306c77e7c8268e4-s.2dbetqa9o8jxf.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+2000-2001,U+2004-2008,U+200A,U+23B8-23BD,U+2500-259F}@font-face{font-family:Geist Mono;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/7d817b4c03b0c5f1-s.1uyisp29ctx0d.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Geist Mono;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/bbc41e54d2fcbd21-s.1rgnod-3esatf.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Geist Mono;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/797e433ab948586e-s.p.0r6juujl39pe6.woff2?dpl=dpl_59jfP51Y57xzoK9UiZm1m85YxtpD)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Geist Mono Fallback;src:local(Arial);ascent-override:74.67%;descent-override:21.92%;line-gap-override:0.0%;size-adjust:134.59%}.geist_mono_8d43a2aa-module__8Li5zG__className{font-family:Geist Mono,Geist Mono Fallback;font-style:normal}.geist_mono_8d43a2aa-module__8Li5zG__variable{--font-geist-mono:"Geist Mono", "Geist Mono Fallback"}
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-outline-style:solid}}}@layer theme{:root,:host{--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:"Geist", "Geist Fallback", ui-sans-serif, system-ui, sans-serif;--default-mono-font-family:"Geist Mono", "Geist Mono Fallback", ui-monospace, monospace}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.fixed{position:fixed}.static{position:static}.table{display:table}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}}:root{--background:#f6f8fb;--foreground:#162033;--muted:#5a667a;--line:#d8e0ea;--panel:#fff;--panel-soft:#edf6f7;--ink:#0f2437;--blue:#1d5fd1;--teal:#0f766e;--green:#2f855a;--yellow:#b7791f;--red:#c2410c;--violet:#6d4aff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--background);min-height:100vh;color:var(--foreground);margin:0;font-family:Geist,Geist Fallback,ui-sans-serif,system-ui,sans-serif;line-height:1.5;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.site-header,.site-footer,.page-shell,.content-section{width:calc(100% - 32px);max-width:1180px;margin-inline:auto}.site-header{justify-content:space-between;align-items:center;gap:24px;padding:18px 0;display:flex}.brand{align-items:center;gap:12px;min-width:260px;display:flex}.brand-mark{color:#0c5d55;background:#d9f4f1;border:1px solid #a7d8d4;place-items:center;width:44px;height:44px;font-weight:800;display:grid}.brand strong,.brand small{display:block}.brand small{color:var(--muted);font-size:12px}.site-nav{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.site-nav a{border:1px solid var(--line);color:#26364f;background:#fff;padding:8px 11px;font-size:14px}.site-nav a:hover,.site-footer a:hover{color:var(--blue);border-color:#95b8d8}.site-footer{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:24px;margin-top:48px;padding:28px 0 40px;display:flex}.site-footer strong{color:var(--foreground)}.site-footer p{max-width:520px;margin:6px 0 0}.site-footer nav{flex-wrap:wrap;gap:12px;display:flex}.page-shell{grid-template-columns:minmax(0,1fr);gap:28px;display:grid}.page-shell>*{min-width:0}.hero-tool{border-top:1px solid var(--line);grid-template-columns:minmax(0,.9fr) minmax(420px,1.25fr);align-items:start;gap:28px;padding-top:26px;display:grid}.hero-copy h1,.article-header h1{color:var(--ink);letter-spacing:0;margin:0;font-size:clamp(34px,5vw,64px);line-height:.98}.hero-copy p,.article-header p,.section-heading p{color:var(--muted);font-size:18px}.eyebrow{color:var(--teal);letter-spacing:0;text-transform:uppercase;margin-bottom:10px;font-size:13px;font-weight:800;display:inline-block}.quick-answer{border-left:5px solid var(--teal);color:#26364f;background:#fff;padding:16px 18px}.action-row{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.button-primary,.button-secondary{border:1px solid #0000;justify-content:center;align-items:center;min-height:42px;padding:10px 14px;font-weight:700;display:inline-flex}.button-primary{background:var(--blue);color:#fff}.button-secondary{border-color:var(--line);color:var(--ink);background:#fff}.content-section{border-top:1px solid var(--line);margin-top:34px;padding-top:22px}.section-heading{justify-content:space-between;align-items:end;gap:18px;margin-bottom:16px;display:flex}.section-heading h2,.tool-result h3{color:var(--ink);margin:0;font-size:26px;line-height:1.15}.periodic-table-wrap{border:1px solid var(--line);background:#fff;padding:14px;overflow-x:auto}.periodic-table{grid-template-rows:repeat(9,74px);grid-template-columns:repeat(18,minmax(62px,1fr));gap:6px;min-width:1130px;display:grid}.element-link{min-width:0;display:block}.element-tile{color:#172033;background:#f8fafc;border:1px solid #cbd5e1;grid-template-rows:14px 24px 16px 15px;height:74px;padding:5px;transition:transform .12s,border-color .12s;display:grid}a.element-link:hover .element-tile{border-color:#1d5fd1;transform:translateY(-2px)}.element-number{color:#637083;font-size:10px}.element-symbol{font-size:22px;font-weight:800;line-height:1}.element-name,.element-charge{text-overflow:ellipsis;white-space:nowrap;font-size:10px;overflow:hidden}.element-charge{color:#0b5f59;font-family:Geist Mono,Geist Mono Fallback,ui-monospace,monospace;font-weight:700}.alkali-metal{background:#dff4e6}.alkaline-earth{background:#fff3bf}.transition-metal{background:#e6edff}.post-transition{background:#e7f1f8}.metalloid{background:#e6f4d7}.nonmetal{background:#e8f8f5}.halogen{background:#ffe4d6}.noble-gas{background:#efe7ff}.lanthanide{background:#ede8ff}.actinide{background:#ffe8e8}.legend-grid{color:var(--muted);flex-wrap:wrap;gap:10px 16px;margin-top:12px;font-size:13px;display:flex}.legend-grid span{align-items:center;gap:6px;display:inline-flex}.legend-dot{border:1px solid #cbd5e1;width:14px;height:14px}.tool-panel{border:1px solid var(--line);background:var(--panel);padding:18px}.tool-two-col{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.tool-input-row{gap:8px;margin-bottom:14px;display:grid}.tool-input-row label{color:#26364f;font-weight:800}.tool-input-row input,.tool-input-row select{width:100%;color:var(--ink);background:#fff;border:1px solid #b9c6d6;padding:12px 13px}.tool-input-row input:focus,.tool-input-row select:focus{border-color:var(--blue);outline:3px solid #b7d7ff}.tool-result{background:#edf8f7;border:1px solid #cce3e2;padding:16px}.tool-result p{color:#344258;margin-bottom:0}.fact-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:16px 0;display:grid}.fact-list div,.resource-card,.text-link-panel{border:1px solid var(--line);background:#fff;padding:14px}.fact-list dt{color:var(--muted);text-transform:uppercase;font-size:12px;font-weight:700}.fact-list dd{margin:4px 0 0;font-family:Geist Mono,Geist Mono Fallback,ui-monospace,monospace;font-weight:800}.data-table{border-collapse:collapse;background:#fff;width:100%}.data-table th,.data-table td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:10px 12px}.data-table th{color:#fff;background:#1c3856}.compact-table th,.compact-table td{padding:8px 10px;font-size:14px}.table-scroll{overflow-x:auto}.resource-grid,.link-grid,.card-grid,.download-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.download-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.download-card{border:1px solid var(--line);background:#fff;align-content:start;gap:9px;min-height:160px;padding:16px;display:grid}.download-card span{color:#0c5d55;background:#d9f4f1;width:fit-content;padding:4px 8px;font-size:12px;font-weight:800}.download-card strong{color:var(--ink);font-size:18px;line-height:1.2}.download-card p{color:var(--muted);margin:0}.download-card:hover,.resource-card:hover,.text-link-panel:hover{border-color:#95b8d8}.asset-preview{object-fit:contain;border:1px solid var(--line);background:#fff;width:100%;max-height:620px;display:block}.resource-card h3,.text-link-panel strong{color:var(--ink);margin:0 0 6px;font-size:18px;display:block}.resource-card p,.text-link-panel span{color:var(--muted)}.article-header{border-top:1px solid var(--line);padding-top:26px}.article-body{width:calc(100% - 32px);max-width:820px;margin:28px auto 0}.article-body h2{color:var(--ink);margin-top:32px}.article-body p,.article-body li{color:#344258;font-size:17px}@media (max-width:900px){.site-header,.site-footer,.section-heading,.hero-tool{display:grid}.hero-tool{width:100%;min-width:0;grid-template-columns:minmax(0,1fr)!important}.hero-copy,.tool-panel,.quick-answer,.periodic-table-wrap{min-width:0;max-width:100%}.action-row{grid-template-columns:minmax(0,1fr);display:grid}.site-nav{justify-content:start}.resource-grid,.link-grid,.card-grid,.download-grid,.tool-two-col,.fact-list{grid-template-columns:1fr}}@media print{.site-header,.site-footer,.action-row,.tool-panel,.content-section:not(.printable-section){display:none}body{background:#fff}.page-shell{width:100%}.periodic-table-wrap{border:0;padding:0;overflow:visible}.periodic-table{grid-template-columns:repeat(18,1fr);gap:3px;min-width:0}}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}