/* Civilization OS — original, dependency-free design */
:root{--bg:#101a24;--bg2:#142432;--panel:#162533;--panel2:#192c3a;--border:#385262;--border-lite:#2d4453;--text:#e5f2e9;--muted:#abc2c6;--mint:#b4f0d2;--brass:#e7b55f;--coral:#f88d7c;--ink:#0a131b;--radius:12px;--display:Georgia,'Times New Roman',serif;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--sans:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;background:var(--bg);color:var(--text);font:400 16px/1.65 var(--sans);overflow-x:hidden}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:var(--mint);text-underline-offset:4px}a:hover{color:#fff}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--brass);outline-offset:4px}::selection{background:var(--brass);color:var(--ink)}.shell{width:min(1330px,calc(100% - 76px));margin-inline:auto}.skip{position:absolute;top:-100px;left:12px;z-index:100;padding:12px 20px;background:var(--mint);color:var(--ink);font-weight:700}.skip:focus{top:10px}.grain{pointer-events:none;position:fixed;inset:0;z-index:20;opacity:.12;background-image:radial-gradient(#c5dbc6 .4px,transparent .6px);background-size:8px 8px;mask-image:linear-gradient(to bottom,#000,transparent 80%)}
.masthead{position:sticky;top:0;z-index:30;background:rgba(16,26,36,.95);border-bottom:1px solid var(--border-lite);backdrop-filter:blur(14px)}.nav-shell{width:min(1500px,calc(100% - 62px));min-height:75px;margin:auto;display:flex;align-items:center;gap:30px}.brand{text-decoration:none;display:inline-flex;align-items:center;gap:11px;color:var(--text);font-family:var(--mono);font-size:15px;font-weight:750;letter-spacing:.08em;line-height:1.16;flex-shrink:0}.brand b{color:var(--mint)}.brand small{display:block;color:var(--muted);font:500 9px/1.5 var(--mono);letter-spacing:.16em;margin-top:5px}.brand-symbol{color:var(--brass);font-size:37px;font-weight:300}.site-nav{display:flex;gap:30px;margin-left:auto}.site-nav a,.home-link{color:var(--muted);font-size:12px;font-family:var(--mono);letter-spacing:.04em;text-decoration:none}.site-nav a:hover,.home-link:hover{color:var(--mint)}.home-link{padding:9px 14px;border:1px solid var(--border);border-radius:3px;white-space:nowrap}
.hero{min-height:570px;padding-block:92px 96px;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(310px,1fr);align-items:center;gap:40px}.eyebrow,.kicker,.hero-kicker,.panel-index,.tiny-tag,.annotation,.stamp,.status-pill,.ticker-inner,.essay-top,.essay-number,.evidence-tag,.boundary b,.methods-detail h4,.method-card>span,.reference-note{font-family:var(--mono);letter-spacing:.11em}.eyebrow{font-size:10px;font-weight:700;color:var(--mint)}.pulse{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 14px var(--mint);margin-right:8px}.divider-dot{padding-inline:9px;color:var(--brass)}.hero-kicker{font-size:12px;color:var(--brass);margin:36px 0 8px}.hero h1{font:400 clamp(35px,3.55vw,63px)/1.12 var(--display);letter-spacing:-.035em;max-width:780px;margin:0}.hero h1 em,.guide-head h2 em,.methods-head h2 em{color:var(--mint);font-weight:400}.hero-lead{max-width:665px;font-size:16px;color:#bed2d4;margin:30px 0 26px}.hero-lead strong{color:var(--text)}.hero-actions,.control-actions,.readout-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;gap:18px;text-decoration:none;font:700 12px/1.25 var(--mono);letter-spacing:.035em;min-height:45px;padding:12px 17px;border:1px solid transparent;border-radius:4px;transition:background .2s,border-color .2s,transform .2s;color:var(--text)}.button:hover{transform:translateY(-2px);color:var(--text)}.button-primary{color:#122720;background:var(--mint);border-color:var(--mint)}.button-primary:hover{color:#102019;background:#d3ffe8}.button-quiet{color:var(--mint);background:transparent;border-color:var(--border)}.button-quiet:hover{border-color:var(--mint);background:#1c3240}.button-outline{background:transparent;color:var(--brass);border-color:#866b46}.button-outline:hover{color:#ffe2a9;background:#433526}.guardrail{max-width:650px;color:var(--muted);font-size:12px;margin-top:26px;line-height:1.8}.stamp{display:inline-block;color:var(--brass);font-weight:700;font-size:10px;margin-right:8px}
.hero-visual{position:relative;aspect-ratio:1;max-width:460px;width:100%;justify-self:center;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle at 50% 50%,#315466 0,#172a38 22%,rgba(27,49,64,.35) 52%,transparent 69%)}.hero-visual::before,.hero-visual::after{content:"";position:absolute;inset:3%;border:1px dashed #597481;border-radius:50%;opacity:.6}.hero-visual::after{inset:12%;border-style:solid;opacity:.25}.orbit{position:absolute;border:1px solid #5d8291;border-radius:50%;opacity:.6;transform:rotate(-20deg)}.orbit-1{width:78%;height:46%}.orbit-2{width:46%;height:78%;transform:rotate(20deg);border-color:#a49262}.orbit-3{width:65%;height:65%;border-style:dashed;opacity:.28}.orb-core{width:154px;height:154px;border:2px solid var(--mint);border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;background:radial-gradient(circle,#254956,#0e202c);box-shadow:0 0 0 12px #b4f0d20d,0 0 70px #b4f0d223}.orb-core>span{font:400 63px/1 var(--display);color:var(--mint);letter-spacing:-.07em}.orb-core>small{font:600 10px var(--mono);color:var(--brass);margin-top:5px}.orbit-label{position:absolute;color:var(--muted);font:9px var(--mono);letter-spacing:.05em;background:var(--bg);padding:3px 7px}.orbit-label-a{top:14%;right:0}.orbit-label-b{bottom:22%;left:-2%}.orbit-label-c{bottom:11%;right:3%}.hero-vector{position:absolute;bottom:-12px;font:10px var(--mono);letter-spacing:.2em;color:var(--brass)}.hero-vector span{color:#7495a0}
.ticker{background:var(--brass);color:#162029;border-block:1px solid #ffd49b}.ticker-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px 18px;width:min(1400px,calc(100% - 76px));margin:auto;padding:12px 0;font-size:10px;font-weight:800}.console-section{padding-top:106px;padding-bottom:128px}.section-heading{display:flex;gap:30px;justify-content:space-between;align-items:flex-end;margin-bottom:28px}.kicker{margin:0 0 18px;color:var(--brass);font-size:11px;font-weight:700}.section-heading h2,.reference-head h2{font:400 clamp(34px,3vw,48px)/1.15 var(--display);letter-spacing:-.025em;margin:0 0 10px}.section-heading p:not(.kicker),.reference-head>p{max-width:710px;margin:0;color:var(--muted)}.status-cluster{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.status-pill{display:inline-flex;gap:8px;align-items:center;border:1px solid var(--border);padding:8px 10px;color:var(--mint);font-size:10px;white-space:nowrap}.status-light{height:6px;width:6px;border-radius:50%;background:var(--mint)}.notice{display:flex;gap:18px;padding:16px 20px;border:1px solid #726344;background:#302d25;color:#e5dcca;font-size:12px;line-height:1.65;margin-bottom:16px}.notice>strong{font:800 10px/1.7 var(--mono);letter-spacing:.07em;color:var(--brass);white-space:nowrap}.notice b{color:#fff}.js-only{display:none}.js .js-only{display:grid}.noscript-message{padding:26px;border:2px solid var(--brass);background:#352b23;color:#fff}.simulator{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:16px}.panel{border:1px solid var(--border);background:linear-gradient(155deg,#1a2c39,#13222e);border-radius:var(--radius);padding:25px;box-shadow:0 18px 70px #03080e2c}.panel-top{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding-bottom:20px;border-bottom:1px solid var(--border-lite)}.panel-index{font-size:10px;color:var(--brass);font-weight:700}.panel h3{font:400 27px/1.2 var(--display);margin:8px 0 0}.tiny-tag{color:var(--mint);font-size:9px;border:1px solid #45645b;border-radius:3px;padding:6px 8px;font-weight:700;white-space:nowrap}.panel-intro,.inspect-panel>p{font-size:13px;color:var(--muted);margin:20px 0 22px}.lever-grid{display:grid;gap:13px}.lever{padding:15px 16px;background:#0e1c28a8;border:1px solid #2d4859;border-radius:7px}.lever-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.lever-heading label{font-weight:750;font-size:13px}.lever-heading output{color:var(--mint);font:800 11px var(--mono)}.lever input[type=range]{width:100%;display:block;margin:18px 0 6px;accent-color:var(--mint);cursor:pointer;min-height:19px}.lever p{margin:7px 0 8px;color:var(--muted);font-size:12px}.lever-ends{display:flex;justify-content:space-between;gap:12px;color:#b6c6ce;font:10px var(--mono)}.shock-fieldset{border:0;margin:26px 0 0;padding:20px 0 0;border-top:1px solid var(--border-lite);min-width:0}.shock-fieldset legend{float:left;padding:0;font-size:16px;font-weight:750}.subtitle{font:9px var(--mono);color:var(--muted);margin-left:10px;letter-spacing:.08em}.field-hint{clear:both;padding-top:8px;font-size:12px;color:var(--muted);margin:0 0 16px}.shock-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.shock{display:flex;align-items:center;gap:10px;position:relative;border:1px solid var(--border);padding:12px 10px;cursor:pointer;border-radius:5px;min-width:0;background:#13232f}.shock:has(input:checked){border-color:var(--coral);background:#493037}.shock:has(input:focus-visible){outline:3px solid var(--brass);outline-offset:2px}.shock input{width:17px;height:17px;flex-shrink:0;accent-color:var(--coral)}.shock span:nth-child(2){min-width:0;flex:1}.shock b{display:block;font-size:12px}.shock small{display:block;font-size:10px;color:var(--muted);line-height:1.5;margin-top:2px}.shock>span:last-child{color:var(--coral);font-size:20px}.control-actions{margin-top:24px}.micro-note{color:var(--muted);font-size:11px;margin:14px 0 0}
.schematic-frame{margin-top:20px;border:1px solid var(--border);background:radial-gradient(ellipse at center,#173645,#0e1b28 70%);border-radius:5px;overflow:hidden}.schematic-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:7px;padding:12px 13px;border-bottom:1px solid #284252;font:9px var(--mono);letter-spacing:.04em;color:var(--muted)}.schematic-top span:first-child{color:var(--brass)}.schematic{display:block;width:100%;height:auto;overflow:visible}.schematic-links{fill:none;stroke:#688d93;stroke-width:1.1;stroke-dasharray:3 7;opacity:.58}.node circle{fill:#183342;stroke:var(--mint);stroke-width:1.5}.node .node-glyph{font:27px var(--display);text-anchor:middle;fill:var(--mint)}.node .node-caption{font:9px var(--mono);fill:#d6e8df;text-anchor:middle;letter-spacing:.04em}.node .node-state{font:800 10px var(--mono);fill:var(--brass);text-anchor:middle}.node[data-level="low"] circle{stroke:var(--coral)}.node[data-level="low"] .node-state{fill:var(--coral)}.node[data-level="high"] circle{stroke:var(--brass)}.node[data-level="high"] .node-state{fill:var(--mint)}.node[data-node="strain"][data-level="high"] circle{stroke:var(--coral)}.node[data-node="strain"][data-level="high"] .node-state{fill:var(--coral)}.node[data-node="strain"][data-level="low"] circle{stroke:var(--mint)}.node[data-node="strain"][data-level="low"] .node-state{fill:var(--mint)}.map-caption{font-size:11px;color:var(--muted);line-height:1.5;margin:10px 0 22px}.readouts{display:grid;gap:9px}.readout{display:grid;grid-template-columns:minmax(0,1fr) 75px 60px;gap:8px;align-items:center;border-bottom:1px solid var(--border-lite);padding:7px 0}.readout b,.readout small{display:block}.readout b{font-size:12px;font-weight:700}.readout small{font-size:10px;color:var(--muted)}.readout .meter{font:700 11px var(--mono);text-align:right}.readout[data-level="low"] .meter{color:var(--coral)}.readout[data-level="medium"] .meter{color:var(--brass)}.readout[data-level="high"] .meter{color:var(--mint)}.readout.adverse[data-level="high"] .meter{color:var(--coral)}.readout.adverse[data-level="low"] .meter{color:var(--mint)}.segments{display:flex;gap:4px;justify-content:flex-end}.segments i{width:14px;height:8px;display:block;background:#335263;border-radius:1px}.readout[data-level="low"] .segments i:nth-child(1),.readout[data-level="medium"] .segments i:nth-child(-n+2),.readout[data-level="high"] .segments i{background:var(--mint)}.readout.adverse .segments i{background:#335263}.readout.adverse[data-level="low"] .segments i:nth-child(1),.readout.adverse[data-level="medium"] .segments i:nth-child(-n+2),.readout.adverse[data-level="high"] .segments i{background:var(--coral)}.readout-footer{padding:17px;background:#10212d;border-left:3px solid var(--brass);margin-top:24px}.readout-footer strong{color:var(--brass);font-size:13px}.readout-footer p{font-size:12px;color:#c5d6d7;margin:6px 0 0;line-height:1.65}.readout-actions{margin-top:18px}.secondary-grid{grid-template-columns:1.07fr 1fr;gap:16px;margin-top:16px}.compare-status{font-size:13px;color:var(--muted);margin-top:18px;line-height:1.7}.compare-results{overflow-x:auto}.compare-table{border-collapse:collapse;width:100%;min-width:380px;margin-top:16px;font-size:12px}.compare-table th,.compare-table td{border-bottom:1px solid var(--border);padding:10px 6px;text-align:left}.compare-table th{color:var(--brass);font:700 11px var(--mono)}.compare-table td:nth-child(n+2){font-weight:700}.compare-context{padding:10px 12px;background:#0b1b27;margin-top:12px;font:11px/1.65 var(--mono);color:var(--muted)}.rule-select{margin-bottom:15px}.rule-select label{display:block;margin:15px 0 8px;font-size:12px;font-weight:700}.rule-select select{width:100%;background:#10202d;color:var(--text);border:1px solid var(--border);border-radius:4px;padding:10px}.rule-explanation{padding:17px;border-left:3px solid var(--mint);background:#0d202a;font-size:12px;line-height:1.7}.rule-explanation strong{color:var(--mint)}.rule-explanation p{margin:7px 0 0}.rule-explanation ul{margin:10px 0 0;padding-left:19px}.rule-explanation li+li{margin-top:5px}.text-link{display:inline-block;margin-top:16px;font-size:12px}
.essay-intro{padding:5px 0 40px}.guide-head{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:end}.guide-head h2,.methods-head h2{font:400 clamp(39px,4.5vw,67px)/1.1 var(--display);letter-spacing:-.035em;margin:0}.guide-head>div:last-child p{font-size:14px;line-height:1.8;color:var(--muted);margin:0 0 16px}.guide-head .annotation{font-size:10px!important;color:var(--brass)!important}.essays{padding-bottom:125px}.essay{border-top:1px solid var(--border);padding:25px 0 66px;scroll-margin-top:80px}.essay:last-child{border-bottom:1px solid var(--border)}.essay-top{display:flex;justify-content:space-between;gap:20px;color:var(--brass);font-size:10px;font-weight:700}.essay-top span:last-child{color:var(--muted)}.essay-grid{display:grid;grid-template-columns:.84fr 1.16fr;gap:8%;margin-top:15px}.essay-title{position:relative}.essay-number{color:#426072;font:400 100px/1 var(--display);position:absolute;top:-4px;right:20px;opacity:.43;pointer-events:none}.essay h3{position:relative;font:400 clamp(30px,3.1vw,48px)/1.13 var(--display);letter-spacing:-.025em;margin:18px 0 22px;max-width:440px}.essay-question{color:var(--brass);font:italic 19px/1.35 var(--display);max-width:430px}.essay-body p{font-size:14px;color:#c3d6d6;line-height:1.88;margin:0 0 17px}.essay-body strong{color:var(--text)}.essay-body a{font:11px var(--mono);text-decoration:underline}.evidence-tag{display:inline;font-size:9px;font-weight:800;color:#172620;background:var(--mint);padding:4px 6px;margin-right:5px;white-space:nowrap}.evidence-tag.interpretation{background:var(--brass);color:#231d13}.essay-body .boundary{border-left:2px solid var(--coral);padding:10px 13px;background:#2a2830;font-size:12px;margin:24px 0 0}.boundary b{color:var(--coral);font-size:10px;display:block;margin-bottom:3px}
.methods-section{background:#1a2c37;border-block:1px solid #365464;padding:100px 0 110px}.methods-head{display:grid;grid-template-columns:1.15fr .85fr;align-items:end;gap:50px;margin-bottom:35px}.methods-head p{color:var(--muted);font-size:14px}.methods-head code{color:var(--mint)}.method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.method-card{padding:25px 22px;background:#101f2b;border:1px solid var(--border);min-height:260px}.method-card>span{font-size:10px;color:var(--brass)}.method-card h3{font:400 24px/1.2 var(--display);margin:20px 0 12px}.method-card p{font-size:12px;color:var(--muted);line-height:1.8;margin:0}.methods-detail{margin-top:55px;padding-top:32px;border-top:1px solid #5a747c}.methods-detail h3{font:400 33px var(--display);margin:0 0 10px}.rule-intro{max-width:930px;color:var(--muted);font-size:14px}.rulebook-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:25px}.rulebook-grid>div{border-top:2px solid var(--brass);padding:8px 12px 12px 0}.rulebook-grid h4{font-size:11px;color:var(--brass);margin:12px 0}.rulebook-grid p{font-size:12px;color:#c4d6d6;line-height:1.8;margin:0}.rulebook-warning{background:#2d292a;border-left:3px solid var(--coral);color:#f2d9d4;padding:16px;margin:30px 0 0;font-size:12px}.blindspots{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;padding:55px 0;border-top:1px solid var(--border);margin-top:50px}.blindspots h3{font:400 32px/1.2 var(--display);margin:0}.blindspots p{font-size:13px;color:var(--muted);line-height:1.9}.ethical-box{border:1px solid #6b806d;background:linear-gradient(90deg,#203e3b,#1a2d36);padding:35px 42px}.ethical-box blockquote{font:italic 31px/1.3 var(--display);color:var(--mint);margin:10px 0 16px;max-width:940px}.ethical-box>p:last-child{font-size:12px;color:#b9d4d0;max-width:800px}
.references-section{padding-top:100px;padding-bottom:100px}.reference-head{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:end;margin-bottom:35px}.reference-head p{font-size:13px;color:var(--muted)}.references{counter-reset:citations;list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 34px}.references li{counter-increment:citations;position:relative;padding:19px 4px 19px 46px;border-top:1px solid var(--border);font-size:13px;line-height:1.75;color:#c5d9d7}.references li:before{content:counter(citations,decimal-leading-zero);position:absolute;top:22px;left:0;color:var(--brass);font:700 12px var(--mono)}.references li b{color:var(--text)}.references li a{display:inline-block;margin-left:7px;font-size:12px}.reference-note{font:400 11px/1.8 var(--mono);color:var(--muted);margin-top:34px;max-width:940px}.signoff{border-top:1px solid var(--border);text-align:center;padding-top:85px;padding-bottom:100px}.signoff h2{font:400 clamp(37px,4vw,58px)/1.13 var(--display);margin:12px 0}.signoff p{max-width:700px;margin:0 auto 25px;font-size:14px;color:var(--muted)}.footer{border-top:1px solid var(--border);background:#0a141d}.footer-inner{display:flex;justify-content:space-between;gap:30px;padding-block:40px}.footer-brand{font:800 15px var(--mono);letter-spacing:.15em}.footer-brand span{color:var(--mint)}.footer p{color:var(--muted);font-size:11px;margin:6px 0}.footer-links{display:flex;align-items:flex-start;flex-wrap:wrap;justify-content:flex-end;gap:10px 20px}.footer-links a{font:11px var(--mono);text-decoration:none}
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@media(max-width:820px){.site-nav{display:none}.home-link{margin-left:auto}.hero{grid-template-columns:1fr;min-height:auto;padding-block:72px 75px}.hero-visual{max-width:370px;margin-top:10px}.hero h1{max-width:730px}.section-heading{display:block}.status-cluster{justify-content:flex-start;margin-top:16px}.simulator,.secondary-grid,.guide-head,.essay-grid,.methods-head,.blindspots,.reference-head{grid-template-columns:1fr}.essay-grid{gap:6px}.essay-title .essay-number{font-size:75px;right:0}.essay h3{max-width:650px}.essay{padding-bottom:40px}.essay-body{max-width:740px}.rulebook-grid{grid-template-columns:repeat(2,1fr)}.references{grid-template-columns:1fr}.guide-head,.methods-head{gap:20px}.blindspots{gap:15px}.footer-inner{flex-direction:column}.footer-links{justify-content:flex-start}}
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