:root{--ink:#20384c;--navy:#172b40;--teal:#147d73;--amber:#f7bf58;--line:#d7e3e6;--paper:#f1f6f5}*{box-sizing:border-box}body{margin:0;color:var(--ink);font-family:'Hiragino Kaku Gothic ProN','Yu Gothic',system-ui,sans-serif;background:var(--paper);font-size:14px}button,input,select{font:inherit}button{cursor:pointer;min-height:44px}button:disabled{opacity:.45;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #d78a16;outline-offset:3px}header{display:flex;justify-content:space-between;align-items:center;padding:18px 4%;gap:20px;background:white;border-bottom:1px solid var(--line)}.brand{font-size:22px;font-weight:800;display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}.brand span{background:var(--amber);border-radius:50%;font-size:30px;line-height:44px;width:44px;text-align:center;color:#815b16}nav{display:flex;gap:6px}nav button{padding:10px 18px;border:0;border-radius:9px;color:#557079;background:transparent}nav .active{color:white;background:var(--navy)}main{max-width:1800px;margin:auto;padding:30px 3.5%}.intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}.eyebrow{font-size:11px;color:#668887;letter-spacing:.7px;font-weight:700}h1{font-size:clamp(26px,3.2vw,43px);letter-spacing:-1px;margin:10px 0}h2{font-size:20px;margin:8px 0 16px}h3{font-size:17px;margin:0 0 16px}p{line-height:1.85;color:#607982}.intro p{margin:0}.intro-badge{background:#fff0ce;border:1px solid #ebd095;border-radius:30px;padding:14px 20px;white-space:nowrap}.model-note{border-left:3px solid #91b4b1;padding:8px 14px;font-size:12px;margin:0 0 24px;background:#e8f0ec}.lab-layout{display:grid;grid-template-columns:minmax(0,1fr) 305px;gap:22px;align-items:start}.lab-main{min-width:0}.arena-card{background:white;border:1px solid var(--line);border-radius:17px;overflow:hidden}.arena-top{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;gap:16px}.arena-top h2{margin:4px 0 0}.arena-top #progress{font-size:12px;font-weight:700;text-align:right}canvas{display:block;width:100%;height:auto}#arena{background:#e3e7d6}.arena-legend{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:12px 20px;background:#f4f6e9;color:#607463;font-size:11px}.shoot-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:17px 20px}.shoot-controls #shot-status{flex-basis:100%;font-size:12px;color:#607982;min-height:22px}.primary,.secondary{border:0;border-radius:9px;padding:11px 18px;font-weight:700}.primary{background:var(--teal);color:white}.secondary{background:#eaf2f1;color:var(--ink)}#single{background:var(--amber);color:#584617}.panel,.chart-card{background:white;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:18px;min-width:0}.tip{background:#fff4d9;border-color:#e7d6a9}.tip p{font-size:12px;margin-bottom:0}label{display:block;font-size:12px;font-weight:600;color:#597680;margin:16px 0 7px}input,select{width:100%;min-height:42px;border:1px solid #cadadc;border-radius:8px;padding:9px;color:var(--ink);background:#f9fcfb;margin-top:7px}input[type=range]{padding:0;accent-color:var(--teal);min-height:30px;margin:0}output{float:right;font-size:16px;font-weight:800;color:var(--ink)}.range-labels{display:flex;justify-content:space-between;font-size:10px;color:#7b9295}#start{width:100%;margin-top:16px}.hint{font-size:12px;line-height:1.85;color:#70868c}.metrics{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin:18px 0}.metric{background:white;border:1px solid var(--line);padding:16px 10px;border-radius:12px}.metric small{font-size:11px;color:#66858a;display:block}.metric strong{display:block;font-size:24px;color:var(--teal);margin:8px 0 2px}.metric em{font-style:normal;font-size:10px;color:#8da0a2}.charts{display:grid;grid-template-columns:1fr 1fr;gap:18px}.chart-title{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}.chart-title h2{font-size:16px;margin:0}.chart-title span{font-size:10px}.chart-title label{margin:0;font-size:10px}.chart-title select{min-height:34px;padding:5px;min-width:70px;margin:4px 0}.chart-card p{font-size:11px;margin-bottom:0}.dark{background:var(--navy);color:#d4eee6;border-color:var(--navy)}.dark p{color:#99beb7}.table-scroll{overflow:auto;max-height:500px}table{border-collapse:collapse;width:100%;font-size:12px;white-space:nowrap}th,td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:right}th{background:#eff5f3;font-weight:500;color:#69878b}th:first-child,td:first-child{text-align:left}td button{min-height:32px;padding:5px 10px;border:0;border-radius:6px;background:#eaf2f1;color:var(--ink)}td input[type=checkbox],.reg-option input{width:18px;min-height:18px;accent-color:var(--teal);vertical-align:middle;margin:0 8px 0 0}summary{cursor:pointer;font-weight:700}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.empty{padding:40px;border:1px dashed #b7ccca;border-radius:14px;color:#7c9396;text-align:center}.comparison-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px}.comparison-cards .panel{border-top:4px solid var(--teal)}.comparison-cards .panel:nth-child(2){border-top-color:#d29a36}.compare-numbers{display:flex;gap:30px;flex-wrap:wrap}.compare-numbers strong{display:block;font-size:25px;margin-top:8px}.compare-numbers small{font-size:11px}.inline-controls{display:flex;gap:16px}.reg-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:22px;align-items:start}.reg-option{display:block;background:#f3f8f5;padding:12px;border-radius:8px;margin:0 0 8px;font-size:12px;cursor:pointer}.reg-option small{display:block;font-weight:400;margin:6px 0 0 26px;color:#6f8c8e}.error-note{background:#fff4db;border-left:4px solid #e2ac48;padding:17px;line-height:1.9;color:#705322}.equation{font-size:20px;font-weight:700;color:var(--teal);padding:15px 0;line-height:1.9}.reg-info{display:flex;gap:30px;flex-wrap:wrap}.reg-info strong{font-size:24px;display:block;margin:5px 0}.reg-info small{font-size:11px}.prediction-inputs{display:flex;align-items:end;gap:15px;flex-wrap:wrap}.prediction-inputs label{flex:1;min-width:110px;margin:0}.prediction-inputs button{margin-bottom:0}.prediction-number{font-size:25px;color:var(--teal);font-weight:700}footer{display:flex;justify-content:space-between;gap:20px;padding:22px 4%;background:white;border-top:1px solid var(--line);font-size:11px;color:#7c9496}.text-button{border:0;background:transparent;color:#8b7460;font-size:11px;padding:6px}.model-details{margin-top:24px}.mobile-only{display:none}[hidden]{display:none!important}@media(min-width:1600px){.lab-layout{grid-template-columns:minmax(0,1fr) 330px}}@media(max-width:1150px){.metrics{grid-template-columns:repeat(3,1fr)}.intro-badge{display:none}.charts{gap:12px}.chart-card{padding:16px}}@media(max-width:950px){.lab-layout{grid-template-columns:1fr}.lab-layout aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.lab-layout aside .tip{grid-column:1/-1}.reg-layout{grid-template-columns:250px minmax(0,1fr)}}@media(max-width:600px){header{display:block;padding:15px}.brand{font-size:21px}nav{margin-top:15px;gap:4px}nav button{flex:1;padding:10px 5px;font-size:12px}main{padding:22px 12px}.mobile-only{display:block}.intro p{font-size:12px}.model-note{font-size:11px}.arena-top{padding:14px;gap:10px}.arena-top #progress{font-size:10px}.arena-legend{padding:10px 12px;font-size:10px}.shoot-controls{padding:15px 12px;gap:8px}.shoot-controls button{padding:10px 11px;font-size:12px}.metrics{gap:8px}.metric{padding:12px 8px}.metric strong{font-size:21px}.metric small{font-size:10px}.charts,.lab-layout aside,.comparison-cards,.reg-layout{grid-template-columns:1fr}.lab-layout aside{gap:0}.panel,.chart-card{padding:16px}.section-heading{display:block}.section-heading button{margin-bottom:12px}.equation{font-size:17px}.reg-info{gap:20px}.prediction-inputs{gap:12px}.inline-controls{gap:10px}.model-details p{font-size:12px}footer{flex-wrap:wrap}}
/* A continuous experiment flow, with jump links instead of tabs. */
html{scroll-behavior:smooth;scroll-padding-top:24px}nav a{padding:10px 15px;border-radius:9px;color:#42666d;background:#eef5f2;text-decoration:none;font-weight:600;white-space:nowrap}.flow-section{scroll-margin-top:24px;margin:32px 0 42px}.flow-heading{display:flex;gap:16px;align-items:start;margin-bottom:19px}.flow-heading>span{background:#e0ede6;color:#357864;border-radius:11px;padding:11px;font-size:17px;font-weight:800}.flow-heading h2{margin:0 0 6px;font-size:24px}.flow-heading p{margin:0;font-size:13px}.setup-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(270px,1fr);gap:22px}.condition-grid{display:grid;grid-template-columns:1fr 1fr 150px;gap:28px}.condition-panel{padding:28px}.condition-panel #start{width:auto;margin-top:30px;padding:14px 25px}.condition-grid label{min-height:25px}.condition-grid output{font-size:18px}.speed-control{margin:0 0 0 auto;min-width:150px}.speed-control select{margin:3px 0 0}.shoot-controls{gap:14px}.arena-card{max-width:100%}.reg-jump{display:inline-block;color:#147d73;font-weight:700;margin:0 0 16px}.model-details{margin:40px 0}.intro{margin-bottom:24px}#analysis .metrics{margin-top:0}#regression{padding-top:20px;border-top:1px solid var(--line)}@media(max-width:1100px){.condition-grid{grid-template-columns:1fr 1fr;gap:15px}.condition-grid>div:last-child{grid-column:1/-1;max-width:250px}.setup-layout{grid-template-columns:minmax(0,1.7fr) minmax(250px,1fr)}}@media(max-width:800px){.setup-layout{grid-template-columns:1fr}.setup-layout>div{display:grid;grid-template-columns:1fr 1fr;gap:16px}.speed-control{margin-left:0}}@media(max-width:600px){nav{display:flex;gap:5px}nav a{font-size:12px;text-align:center;padding:11px 7px;flex:1}.flow-heading{gap:10px}.flow-heading>span{font-size:14px;padding:8px}.flow-heading h2{font-size:21px}.flow-heading p{font-size:12px}.condition-panel{padding:18px}.condition-grid{grid-template-columns:1fr;gap:5px}.condition-grid>div:last-child{grid-column:auto;max-width:none}.condition-panel #start{width:100%;margin-top:17px}.setup-layout>div{display:block}.shoot-controls .speed-control{flex-basis:100%;display:flex;gap:12px;align-items:center}.speed-control select{width:auto;flex:1}.reg-layout{grid-template-columns:1fr}.flow-section{margin:25px 0 34px}.charts{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.danger{border:1px solid #d8a39d;color:#963e34;background:#fff1ee;border-radius:9px;padding:11px 18px;font-weight:700;min-height:44px}