*,:before,:after{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border-width:0;border-style:solid;border-color:#e5e7eb}:before,:after{--tw-content: ""}html,:host{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{margin:0;line-height:inherit}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;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.visible{visibility:visible}.static{position:static}.block{display:block}.hidden{display:none}.grow{flex-grow:1}.rounded{border-radius:.25rem}:root{--ink:#0b0d0f;--panel:#11161a;--panel2:#151b20;--copper:#b66a27;--brass:#e6ac4c;--cream:#fff0c9;--muted:#b6c0c8;--amber:#ff9f1f;--green:#46df7f;--blue:#2587e8;--paper:#e8c78a;--line:#57351e}*{box-sizing:border-box}html{background:#090b0d;color:#f5ead2;scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:radial-gradient(circle at 70% 0,#2b1a0e 0,transparent 27%),linear-gradient(#0b0e10,#080a0c);color:#e9e2d7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}h1,h2,h3,.brand{font-family:Georgia,Times New Roman,serif;color:var(--cream)}.topbar{height:72px;position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:24px;padding:0 4vw;background:linear-gradient(180deg,#15181a 0,#0c0f11);border-top:2px solid #8a4e20;border-bottom:2px solid #7c461f;box-shadow:0 8px 28px #0009,inset 0 1px #e9a34c55}.topbar:before,.topbar:after{content:"";position:absolute;top:11px;bottom:11px;width:10px;border:2px solid #7f481e}.topbar:before{left:14px}.topbar:after{right:14px}.brand{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:700;white-space:nowrap}.brand img{width:42px;height:42px;filter:drop-shadow(0 0 10px #ff991a88)}.brand small{font-family:inherit;font-size:.62em;color:#d89e49}.topbar nav{display:flex;gap:7px;margin-left:auto}.topbar nav a{display:flex;align-items:center;gap:7px;padding:10px 12px;border-radius:8px;color:#eadfc8;font-size:14px}.topbar nav a:hover{background:#2b2117;color:#ffd177}.topbar nav img{width:23px;height:23px}.search{border:1px solid #69411f;border-radius:999px;padding:9px 17px;color:#efc775}.hero{min-height:650px;display:grid;grid-template-columns:47% 53%;border-bottom:3px solid #7b451d;position:relative;overflow:hidden;background:linear-gradient(90deg,#0b0d0f 0 44%,#1b120b 70%)}.hero:before{content:"";position:absolute;inset:0;background-image:url(/images/ui/soot-overlay.svg);opacity:.22;pointer-events:none}.hero-copy{padding:92px 5vw 70px 6vw;position:relative;z-index:3;background:linear-gradient(90deg,#090c0e 0,#090c0ef7 72%,transparent)}.eyebrow{font-size:12px;letter-spacing:.22em;color:#d99b3f;font-weight:800;text-transform:uppercase}.hero h1{font-size:clamp(54px,6.2vw,92px);line-height:.91;margin:14px 0 24px;text-shadow:0 3px 0 #331a08,0 0 28px #d37a2040}.hero h1 span{color:#ffd98a}.lede{max-width:700px;font:21px/1.55 Georgia,serif;color:#d6d8d9}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid #8a5425;border-radius:8px;padding:14px 21px;font-weight:800;box-shadow:inset 0 1px #fff2,0 6px 18px #0006}.btn.primary{background:linear-gradient(#ffc660,#d98a29);color:#241509;border-color:#f4c06b}.btn.ghost{background:#11171b;color:#f0d7a6}.btn.small{padding:10px 14px;margin-top:14px}.statusline{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px;font-size:13px;color:#c7c9c7}.statusline span:first-child{color:#62e795}.hero-visual{position:relative;min-height:650px;overflow:hidden}.hero-visual>img{width:100%;height:100%;-o-object-fit:cover;object-fit:cover;filter:saturate(1.08) contrast(1.04)}.hero-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#090c0e 0,transparent 25%),linear-gradient(0deg,#090c0e55,transparent 30%)}.hero-plaque{position:absolute;z-index:4;right:5%;top:24%;padding:20px 17px;border:2px solid #8b5224;outline:1px solid #e2a34b55;background:#11161bd9;color:#d9ad66;font:700 14px/1.85 Georgia,serif;text-align:center;box-shadow:0 10px 30px #000b}.section{max-width:1500px;margin:auto;padding:54px 4vw}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section-head h2,.calculator-rig h2,.lower-grid h2{font-size:38px;margin:6px 0}.section-head>p{color:#c7aa78;letter-spacing:.08em;text-transform:uppercase;font-size:12px}.system-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.system-card{position:relative;overflow:hidden;border:1px solid #77451f;background:#0d1216;border-radius:10px;box-shadow:inset 0 0 0 3px #1c2428,0 12px 30px #0008;transition:.2s transform,.2s border-color}.system-card:hover{transform:translateY(-4px);border-color:#d28e38}.system-card>img{width:100%;aspect-ratio:16/9;-o-object-fit:cover;object-fit:cover}.card-copy{position:relative;padding:18px 60px 20px 20px;min-height:132px;background:linear-gradient(#11171b,#0b1115)}.card-copy h3{font-size:28px;margin:0 0 8px}.card-copy p{margin:0;color:#b9c2c8;line-height:1.45}.round-arrow{position:absolute;right:18px;bottom:20px;width:38px;height:38px;border:2px solid #e2a84b;border-radius:50%;display:grid;place-items:center;color:#f6cf82;font-size:24px}.calculator-rig{display:grid;grid-template-columns:2fr 1fr;gap:24px;background:linear-gradient(90deg,#d8b36f,#f0d59e 52%,#c9a667);color:#21170f;border-block:5px solid #553016;box-shadow:inset 0 0 50px #81531d55}.drafting{display:grid;grid-template-columns:100px 1fr;gap:24px;align-items:center}.drafting>img{width:90px}.calculator-rig h2{color:#29180c}.calculator-rig p{font:18px/1.55 Georgia,serif}.eyebrow.dark{color:#70410f}.checklist{margin:0;padding:24px 30px;background:#dfc18a;border:1px solid #7c5225;box-shadow:0 4px 15px #0003;list-style:none;align-self:center}.checklist li{padding:8px 0;border-bottom:1px dashed #9d7741}.checklist li:before{content:"☑";margin-right:10px}.lower-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.panel{border:1px solid #75471f;background:linear-gradient(145deg,#13191d,#0b1013);padding:28px;border-radius:10px;box-shadow:inset 0 0 0 3px #1b2327,0 15px 36px #0007}.timeline{display:grid;gap:8px}.timeline a{display:grid;grid-template-columns:130px 1fr;gap:18px;padding:13px 15px;border:1px solid #334149;background:#0e1418}.timeline span{color:#aeb8bf}.answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.answer-grid a{padding:16px;border:1px solid #60401f;background:#10171b;font-weight:700}.answer-grid a span{display:block;font-weight:400;color:#c69b5d;margin-top:6px}.proof{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;padding-block:20px;background:#0b0e10;border-block:1px solid #4d301b}.proof div{text-align:center;padding:26px}.proof span{font:700 35px Georgia,serif;color:#f1bd61}.proof small{display:block;color:#98a2a9}.site-footer{display:grid;grid-template-columns:1.3fr 1fr auto;gap:28px;align-items:center;padding:32px 5vw 45px;border-top:2px solid #75431f;background:#0a0d0f;color:#9fa9ae}.footer-brand{display:flex;gap:15px;align-items:center}.footer-brand img{width:50px}.footer-brand strong{font:700 20px Georgia,serif;color:#f0d9a7}.footer-brand p{margin:5px 0 0}.footer-links{display:flex;gap:15px;flex-wrap:wrap}.footer-links a{color:#d9bd8a}.footer-motto{font:700 12px/1.5 Georgia,serif;letter-spacing:.1em;color:#b87a35}.inner{max-width:1320px;margin:auto;padding:50px 4vw 80px}.page-hero{padding:35px 0}.page-hero.compact{max-width:900px}.page-hero h1{font-size:58px;margin:8px 0 16px}.page-hero p{font:20px/1.55 Georgia,serif;color:#bec5c9}.calc-shell{display:grid;grid-template-columns:1fr 1.3fr;gap:24px;padding:28px;border:1px solid #7a4a22;background:linear-gradient(145deg,#141b20,#0b1013);border-radius:12px;box-shadow:0 20px 50px #0008}.calc-form{display:grid;gap:16px}.calc-form label{font-weight:700;color:#e8cd9a}.calc-form input{display:block;width:100%;margin-top:8px;background:#070a0c;color:#fff;border:1px solid #704823;border-radius:8px;padding:14px;font-size:20px}.calc-results{display:grid;grid-template-columns:1fr 1fr;gap:12px}.calc-results div{padding:22px;border:1px solid #3c4a50;background:#0b1115}.calc-results small{display:block;color:#aab5ba}.calc-results strong{font:700 38px Georgia,serif;color:#efb65a}.error{color:#ff8e70}.guide-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.guide-list>a{display:grid;grid-template-columns:170px 1fr 40px;gap:18px;align-items:center;background:#0f1519;border:1px solid #4d3925;border-radius:9px;overflow:hidden;padding-right:16px}.guide-list img{width:170px;height:125px;-o-object-fit:cover;object-fit:cover}.guide-list small{color:#d49235;text-transform:uppercase;letter-spacing:.12em}.guide-list h2{font-size:22px;margin:5px 0}.guide-list p{margin:0;color:#aeb8bf}.guide-list>a>span{font-size:28px;color:#eab458}.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px}.article-wrap.single{grid-template-columns:1fr}.article-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:25px;align-items:center;border-bottom:1px solid #5b3b21;padding-bottom:26px}.article-hero h1{font-size:50px;line-height:1.02;margin:8px 0 16px}.article-hero p{font:19px/1.5 Georgia,serif;color:#bac1c5}.article-hero img{width:100%;aspect-ratio:16/9;-o-object-fit:cover;object-fit:cover;border:1px solid #77471f;border-radius:9px}.evidence-badge{display:inline-block;padding:7px 10px;border:1px solid #2f754d;background:#10251a;color:#72e89a;font-size:12px}.article-prose{font-size:17px;line-height:1.78;color:#d0d3d2;max-width:880px}.article-prose h1{display:none}.article-prose h2{font-size:30px;margin-top:40px;border-bottom:1px solid #49311d;padding-bottom:8px}.article-prose blockquote{margin:22px 0;padding:14px 18px;border-left:4px solid #d28a2f;background:#151a1d;color:#d8bd8b}.article-prose a{color:#e7ad54;text-decoration:underline}.article-prose li{margin:8px 0}.aside-card{display:block;position:sticky;top:92px;margin-bottom:15px;padding:20px;border:1px solid #5a3c22;background:#11171b;border-radius:9px}.aside-card b{display:block;color:#f2cf8a;font-family:Georgia,serif;font-size:19px;margin-bottom:8px}.aside-card a,.aside-card span{color:#e8ad52}.aside-card p{color:#9fa9ae;font-size:14px}.aside-card.tool{top:auto;position:relative}@media(max-width:1050px){.topbar nav a{font-size:0;padding:8px}.topbar nav img{width:26px;height:26px}.hero{grid-template-columns:1fr}.hero-copy{padding:70px 6vw 40px;background:linear-gradient(#090c0ef7,#090c0ed8)}.hero-visual{min-height:420px}.system-grid{grid-template-columns:repeat(2,1fr)}.calculator-rig,.lower-grid,.article-wrap,.guide-list,.article-hero{grid-template-columns:1fr}.aside-card{position:relative;top:auto}}@media(max-width:680px){.topbar{height:62px;padding-inline:18px}.brand{font-size:18px}.brand img{width:35px;height:35px}.search{display:none}.hero{min-height:auto}.hero-copy{padding:55px 20px 34px}.hero h1{font-size:51px}.lede{font-size:18px}.hero-visual{min-height:330px}.hero-plaque{right:12px;top:14%;font-size:11px}.section{padding:38px 17px}.section-head{align-items:start;flex-direction:column}.section-head h2,.calculator-rig h2,.lower-grid h2{font-size:31px}.system-grid{grid-template-columns:1fr}.calculator-rig{padding-inline:20px}.drafting{grid-template-columns:60px 1fr;gap:14px}.drafting>img{width:58px}.answer-grid,.proof{grid-template-columns:1fr 1fr}.lower-grid{padding-inline:17px}.site-footer{grid-template-columns:1fr}.footer-motto{display:none}.page-hero h1{font-size:44px}.calc-shell{grid-template-columns:1fr}.guide-list>a{grid-template-columns:115px 1fr 25px}.guide-list img{width:115px;height:115px}.guide-list p{display:none}.article-hero h1{font-size:39px}}.guides-drop{position:relative;align-self:stretch;display:flex;align-items:center}.guides-drop>summary{list-style:none;cursor:pointer;padding:9px 17px;border:1px solid #69411f;border-radius:999px;color:#efc775;font-size:14px;white-space:nowrap;background:transparent}.guides-drop>summary::-webkit-details-marker{display:none}.guides-drop>summary:hover,.guides-drop[open]>summary{background:#2b2117;color:#ffd177}.drop-panel{position:absolute;top:100%;right:0;margin-top:2px;background:#12161a;border:1px solid #5b3b21;border-radius:0 0 12px 12px;box-shadow:0 18px 40px #000c;padding:14px 16px;width:660px;max-width:92vw;z-index:60}.drop-head{display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid #3a2a18;padding-bottom:8px;margin-bottom:10px}.drop-head a{color:#ffd177;font-weight:700}.drop-head span{color:#8a94a0;font-size:12px}.drop-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:6px 16px}.drop-cols b{display:block;color:#e6ac4c;font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:5px;margin-top:4px}.drop-cols a{display:block;padding:2.5px 0;color:#d8d2c4;font-size:13.5px;white-space:nowrap}.drop-cols a:hover{color:#ffd177}.drop-foot{display:flex;justify-content:space-between;gap:10px;border-top:1px solid #3a2a18;margin-top:10px;padding-top:10px}.drop-foot a{color:#ffd177;font-size:13.5px}.steam-btn{margin-left:8px;border-radius:999px;padding:9px 16px;color:#1a1206;background:linear-gradient(180deg,#ffc964,#e09a2f);font-weight:700;font-size:13.5px;white-space:nowrap}.zoomable{margin:0}.zoomable figcaption{font-size:12px;color:#8a94a0;margin-top:6px}.zoomable a img{transition:transform .15s ease,border-color .15s ease}.zoomable a:hover img{transform:scale(1.015);border-color:#e6ac4c}@media(max-width:680px){.steam-btn{display:none}.drop-panel{width:min(94vw,560px);padding:12px}.drop-cols{grid-template-columns:1fr 1fr}.drop-cols a{white-space:normal}.topbar{gap:8px;padding:0 14px}.topbar:before,.topbar:after{display:none}.brand{font-size:15px;gap:6px}.brand img{width:28px;height:28px}.brand small{display:none}.topbar nav{gap:2px}.topbar nav a{padding:6px 4px}.guides-drop>summary{padding:7px 12px;font-size:13px}}