@font-face{font-family:Inter;src:local('Inter');font-display:swap}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f8f9fc;color:#192237;font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:16px;line-height:1.55}button,input,select{font:inherit}button,a,input,summary{touch-action:manipulation}button{cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #2b49ee;outline-offset:5px}header{height:100px;margin:0 5vw;display:flex;align-items:center;gap:36px;border-bottom:1px solid #dce0e9}.wordmark{font-weight:900;font-size:32px;letter-spacing:-2px;text-decoration:none}.wordmark span{font-size:12px;vertical-align:top;margin:6px 0 0 5px;display:inline-block;letter-spacing:0}.header-title,.preview-label,.tool-label,.eyebrow,.smallcaps{font-size:12px;font-weight:700;letter-spacing:1.4px}.header-title{color:#687287}.preview-label{margin-left:auto;color:#586278;border:1px solid #dce0e9;padding:6px 10px;border-radius:4px;font-size:10px}.shell{max-width:1440px;margin:0 auto;display:grid;grid-template-columns:250px minmax(0,1fr);min-height:650px;padding:52px 5vw 70px;gap:48px}aside{padding-top:6px;display:flex;flex-direction:column}.tool-label{font-size:11px;color:#687287;letter-spacing:1px}nav{margin-top:37px;display:grid;gap:12px}.step{display:flex;align-items:center;gap:12px;text-align:left;border:none;background:none;color:#8a93a2;padding:8px 0;font-size:14px;cursor:default}.step.can-go{cursor:pointer;color:#526079}.step b{display:grid;place-items:center;height:28px;width:28px;border:1px solid #d5dae5;border-radius:50%;font-size:12px}.step.active{color:#2b49ee;font-weight:650}.step.active b{background:#2b49ee;color:white;border-color:#2b49ee}.side-note{margin-top:auto;padding-top:70px;font-size:14px;color:#47536a}.mini-line{display:block;width:30px;height:3px;background:#2b49ee}.side-note small{font-size:12px;color:#687287}.eyebrow{color:#2b49ee;margin:0 0 14px;font-size:11px}h1{font-size:clamp(34px,4vw,53px);line-height:1.08;letter-spacing:-2px;font-weight:750;max-width:760px;margin:0 0 20px}h1 em{color:#2b49ee;font-style:normal}h2{font-size:25px;line-height:1.2;letter-spacing:-.6px;margin:0 0 14px}h3{font-size:18px;line-height:1.3;margin:0 0 8px}p{margin:0 0 18px}.intro{max-width:630px;color:#687287;font-size:17px;line-height:1.6}.choices{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:36px}.choice{background:white;border:1px solid #dce0e9;border-radius:12px;padding:28px;text-align:left;color:#192237;position:relative;min-height:220px;transition:transform .18s,border-color .18s,box-shadow .18s}.choice:hover{transform:translateY(-3px);border-color:#2b49ee;box-shadow:0 10px 28px #19223708}.choice.primary{background:#2b49ee;color:white;border-color:#2b49ee}.choice-icon{display:inline-grid;place-items:center;width:40px;height:40px;background:#eef1ff;color:#2b49ee;border-radius:8px;font-size:23px;margin-bottom:28px}.choice.primary .choice-icon{background:#ffffff1c;color:white}.choice strong{display:block;font-size:21px;line-height:1.25;letter-spacing:-.4px;margin-bottom:12px}.choice p{font-size:14px;color:#69738b;line-height:1.55;max-width:250px;margin:0}.choice.primary p{color:#e3e7ff}.arrow{position:absolute;right:24px;top:28px;font-size:24px}.quiet-row{display:flex;gap:24px;flex-wrap:wrap;margin-top:25px;color:#687287;font-size:12px}.quiet-row span:before{content:'✓';color:#2b49ee;margin-right:7px}.zone-strip{display:flex;gap:5px;margin-top:48px;height:7px}.zone-strip span{flex:1;border-radius:2px}.strip-label{display:flex;justify-content:space-between;color:#727e90;font-size:11px;margin-top:8px;letter-spacing:.3px}footer{margin:0 5vw;padding:24px 0;border-top:1px solid #dce0e9;color:#798397;display:flex;justify-content:space-between;gap:20px;font-size:11px}footer span:first-child{letter-spacing:1px;font-weight:650}.skip{position:fixed;left:16px;top:-80px;background:white;z-index:5;padding:12px}.skip:focus{top:12px}.back,.link-btn{border:0;background:none;padding:0;color:#55647a;text-decoration:underline;text-underline-offset:4px;font-size:14px}.back{margin-bottom:24px;text-decoration:none}.back:hover,.link-btn:hover{color:#2b49ee}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:48px;padding:12px 20px;background:#2b49ee;border:1px solid #2b49ee;border-radius:7px;color:white;font-size:14px;font-weight:650;text-decoration:none}.btn:hover{background:#2037b9}.btn.secondary{background:white;color:#192237;border-color:#d4dae5}.btn.secondary:hover{border-color:#2b49ee;color:#2b49ee}.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:28px}.mode-choices{grid-template-columns:repeat(3,1fr);gap:12px}.mode-choices .choice{padding:24px 20px;min-height:190px}.mode-choices strong{font-size:18px}.form-panel{background:white;border:1px solid #dce0e9;border-radius:12px;padding:30px;margin-top:26px;max-width:710px}.field{margin-bottom:26px}.field:last-of-type{margin-bottom:0}.field label{display:block;font-size:15px;font-weight:650;margin-bottom:6px}.field .hint{font-size:13px;line-height:1.5;color:#687287;margin:0 0 12px}.input-unit{position:relative;max-width:270px}.input-unit input{width:100%;height:58px;border:1px solid #bbc4d4;border-radius:7px;padding:10px 62px 10px 15px;font-size:24px;font-variant-numeric:tabular-nums;color:#192237;background:#fdfdff}.input-unit span{position:absolute;right:16px;top:18px;color:#687287;font-size:14px}.input-unit input[aria-invalid=true]{border:2px solid #b93849}.error{color:#aa283c;font-size:13px;margin:6px 0 0}.optional{font-weight:400;color:#737e92;font-size:12px;margin-left:8px}.note{border-left:3px solid #2b49ee;padding:14px 18px;background:#edf0ff;color:#465477;font-size:14px;margin-top:24px;border-radius:0 6px 6px 0}.result-cards{display:flex;gap:16px;flex-wrap:wrap;margin:30px 0}.metric{flex:1;min-width:140px;padding:22px;background:white;border:1px solid #dce0e9;border-radius:10px}.metric.featured{background:#2b49ee;color:white;border-color:#2b49ee}.metric label{font-size:12px;display:block;letter-spacing:.5px;margin-bottom:10px}.metric strong{font-size:44px;line-height:1.1;letter-spacing:-1.6px;font-weight:650}.metric strong small{font-size:16px;margin-left:7px;letter-spacing:0;font-weight:400}.metric p{font-size:11px;color:#7c879a;margin:10px 0 0}.metric.featured p{color:#d8dfff}.table-wrap{overflow:auto;border:1px solid #dce0e9;border-radius:10px;background:white;margin-top:20px}table{width:100%;border-collapse:collapse;font-size:14px;white-space:nowrap;text-align:left}th{font-size:11px;color:#728097;letter-spacing:.8px;font-weight:650;background:#f0f3f9}th,td{padding:16px 18px;border-bottom:1px solid #e6eaf1}tr:last-child td{border-bottom:0}td b{font-size:13px}.zone-tag{display:inline-flex;align-items:center;justify-content:center;min-width:32px;height:30px;color:var(--zone);background:color-mix(in srgb,var(--zone) 12%,white);border-radius:5px;font-size:12px;font-weight:700;margin-right:12px}.zone-name{display:inline-block;vertical-align:middle}.zone-name small,td .pct{display:block;font-size:11px;color:#788397;margin-top:3px}.numeric{font-variant-numeric:tabular-nums;font-weight:650}.table-note{color:#758196;font-size:12px;margin:12px 0 25px}.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-top:34px}details{border-bottom:1px solid #dce0e9;padding:18px 0}summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;font-weight:600;font-size:15px}summary::-webkit-details-marker{display:none}summary:after{content:'+';font-size:23px;font-weight:400;color:#6e7a90}details[open] summary:after{content:'−'}details p{color:#59667c;margin:16px 0 0;font-size:14px}details ol,details ul{font-size:14px;color:#59667c;padding-left:22px}details li{margin:10px 0}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}#status{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);border-radius:8px;background:#192237;color:white;font-size:14px;padding:12px 20px;box-shadow:0 5px 25px #19223730;z-index:20;max-width:90vw}#status:empty{display:none}main:focus{outline:none}
@media(min-width:1450px){.shell{padding-left:45px;padding-right:45px}}@media(max-width:1000px){.shell{grid-template-columns:180px minmax(0,1fr);gap:25px}.choice{padding:24px;min-height:240px}.mode-choices{grid-template-columns:1fr}.mode-choices .choice{min-height:90px;display:flex;align-items:center;gap:20px}.mode-choices .choice-icon{margin:0}.mode-choices p{display:none}.mode-choices strong{margin:0}}@media(max-width:720px){header{height:78px;margin:0 22px;gap:18px}.wordmark{font-size:26px}.header-title{display:none}.preview-label{font-size:9px}.shell{display:block;padding:22px 22px 44px;min-height:0}aside{padding:0}.tool-label,.side-note{display:none}nav{display:flex;gap:16px;margin:0 0 35px;justify-content:space-between}.step{font-size:11px;gap:6px;white-space:nowrap}.step b{width:23px;height:23px;font-size:10px}h1{font-size:38px;letter-spacing:-1.7px}.intro{font-size:16px}.choices{gap:12px;margin-top:25px}.choice{padding:20px;min-height:230px}.choice strong{font-size:18px}.choice p{font-size:13px}.choice-icon{margin-bottom:22px}.arrow{right:15px;top:20px}.quiet-row{gap:10px 18px;font-size:11px}.zone-strip{margin-top:32px}footer{margin:0 22px;flex-direction:column;gap:8px;padding:20px 0;font-size:10px}.form-panel{padding:22px}.metric{padding:20px;min-width:125px}.metric strong{font-size:36px}.metric strong small{font-size:13px}.result-cards{gap:10px}.section-title h2{font-size:21px}th,td{padding:14px 12px}.zone-tag{margin-right:8px}.zone-name b{font-size:12px}.table-wrap{margin-left:-3px;margin-right:-3px}.btn{min-height:50px}.back{margin-bottom:18px}}@media(max-width:390px){.choices{grid-template-columns:1fr}.choice{min-height:185px}.choice-icon{margin-bottom:14px}.step{font-size:10px;gap:4px}nav{gap:6px}.metric{min-width:110px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.prep-summary{display:flex;gap:36px;margin:28px 0;color:#738096;font-size:12px}.prep-summary b{display:block;color:#192237;font-size:22px;letter-spacing:-.6px}.workout-chart{display:flex;align-items:flex-end;gap:3px;height:110px;border-bottom:1px solid #d9dfeb;margin-top:35px}.workout-chart>div{min-width:5px;border-radius:3px 3px 0 0}.chart-labels{display:flex;justify-content:space-between;font-size:10px;letter-spacing:.7px;color:#78859a;margin-top:9px}.protocol-list{margin:30px 0}.protocol-list>div{display:flex;gap:20px;padding:16px 0;border-bottom:1px solid #dce0e9}.protocol-list>div>span{font-size:12px;padding-top:3px;color:#768299}.protocol-list p{margin:0;color:#62718a;font-size:14px}.protocol-list b{display:block;font-size:15px;color:#192237;margin-bottom:4px}.protocol-list .test-row b,.protocol-list .test-row>span{color:#2b49ee}.download-panel{margin-top:35px;padding:28px;background:#edf0f8;border-radius:10px}.download-panel>p:not(.eyebrow){font-size:14px;color:#65728a}.download-panel .actions{gap:12px 18px}.next-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid #dce0e9;margin-top:34px;padding-top:30px}.next-panel p{font-size:13px;margin:0;color:#69758d}.copy-values{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}.end-actions{border-top:1px solid #dce0e9;padding-top:25px;gap:30px}button:disabled{cursor:default;opacity:.55}#copy-data{width:100%;margin-top:12px;font-size:14px;font-family:inherit;padding:12px;border:1px solid #bac3d7;border-radius:4px}@media(max-width:720px){.next-panel{align-items:flex-start;flex-direction:column}.download-panel{padding:22px}.download-panel .btn{width:100%}.prep-summary{gap:26px}.section-title .smallcaps{font-size:9px}}
.shell{display:block;max-width:1020px;min-height:530px;padding-top:24px}.tool-label,.side-note{display:none}aside{padding:0}nav{display:flex;gap:30px;margin:0 0 34px}.step{font-size:13px}h1{font-size:32px;letter-spacing:-1px;line-height:1.2;margin-bottom:14px}.intro{font-size:16px;max-width:760px}.choices{margin-top:28px}.choice{min-height:170px;padding:24px;border-radius:8px;display:flex;flex-direction:column}.choice:hover{transform:none;box-shadow:none}.choice strong{font-size:18px;max-width:260px}.choice p{max-width:330px}.choice-next{font-size:22px;margin-top:auto;padding-top:16px;color:#536078}.data-options{padding:0;margin:26px 0 0;border:0;display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:610px}.data-option{border:1px solid #bbc4d4;border-radius:7px;padding:22px;display:flex;align-items:center;gap:14px;background:white;cursor:pointer}.data-option:has(input:checked){border-color:#2b49ee;background:#f0f3ff}.data-option input{width:20px;height:20px;margin:0;accent-color:#2b49ee}.metric{min-width:190px;overflow-wrap:anywhere}.metric-label{font-size:14px;font-weight:650;line-height:1.35}.metric-subtitle{font-size:12px;line-height:1.5;color:#6d7a91;margin:4px 0 16px}.metric p{font-size:12px}.metric .link-btn{font-size:12px}.result-cards{align-items:stretch}.metric strong{display:block;white-space:nowrap}.form-panel{max-width:none}.preview-label{font-weight:500}.header-title{letter-spacing:.6px;font-size:11px}footer{justify-content:flex-end}footer span:first-child{display:none}@media(max-width:720px){.shell{padding-top:18px}nav{gap:22px;justify-content:flex-start;margin-bottom:28px}.step{font-size:12px}h1{font-size:28px;letter-spacing:-.7px}.choices{grid-template-columns:1fr}.choice{min-height:145px}.data-options{grid-template-columns:1fr}.data-option{padding:18px}.result-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(155px,1fr))}.metric{min-width:0;padding:18px}.metric-subtitle{overflow-wrap:anywhere;min-height:36px}.metric strong{font-size:32px}.metric strong small{font-size:12px}.section-title .smallcaps{display:none}}

.howto-test-title{margin-top:32px}

footer span:first-child{display:inline;letter-spacing:0;font-weight:400}
