:root{color-scheme:light;--ink:#173e4f;--teal:#126b72;--cream:#f6f9ed;--yellow:#ffe196;--line:#bdcfc7}
*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:ui-rounded,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6;font-size:18px}a{color:var(--teal);text-underline-offset:.2em}button,input,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--ink);outline-offset:5px}header,main,footer{width:min(1080px,calc(100% - 40px));margin:auto}.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:850;font-size:24px}.brand img{width:40px;height:40px}.back{font-weight:700}.hero{display:grid;grid-template-columns:1fr 180px;gap:25px;align-items:center;padding:45px 0 25px}.kicker{display:inline-block;background:var(--yellow);padding:5px 12px;border-radius:30px;font-weight:800;font-size:13px;letter-spacing:.06em;text-transform:uppercase}h1{font-size:clamp(36px,6vw,58px);line-height:1.1;margin:18px 0}h2{font-size:28px;line-height:1.25;margin-top:0}h3{font-size:21px;margin:0 0 10px}.hero p{max-width:700px}.hero img{width:170px;height:auto}.free{font-weight:700;font-size:16px}.safety{background:#e4efe9;border:1px solid var(--line);border-radius:18px;padding:22px;margin-bottom:24px}.safety p{margin:8px 0}.safety strong{font-weight:800}form,.session{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;margin:0 0 28px;box-shadow:0 8px 24px #173e4f0a}.choices-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-weight:800;margin-bottom:12px}.choice{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:12px;padding:14px 12px;margin-bottom:10px;cursor:pointer;line-height:1.35}.choice:has(input:checked){border:2px solid var(--teal);padding:13px 11px;background:#eef7f2}input{accent-color:var(--teal);width:19px;height:19px;flex:0 0 19px}.hint{font-size:15px;line-height:1.45}.primary,.secondary,.stop{display:inline-flex;justify-content:center;align-items:center;min-height:48px;border-radius:12px;border:2px solid var(--teal);padding:12px 20px;font-weight:800;text-decoration:none}.primary{background:var(--teal);color:#fff}.primary:hover{background:#0c5259;border-color:#0c5259}.secondary{background:#fff;color:var(--teal)}.secondary:hover{background:#e4efe9}.stop{background:#fff;color:#722c2b;border-color:#722c2b}.stop:hover{background:#f9eeeb}.start-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:20px}.privacy{font-size:15px;color:#345767}.session{scroll-margin-top:20px}.session-grid{display:grid;grid-template-columns:1fr 150px;gap:26px;align-items:start}.step{font-weight:800;color:var(--teal)}#instruction{font-size:24px;line-height:1.5}#amplitude-note{padding-left:14px;border-left:4px solid var(--yellow)}.clock{text-align:center;background:#eef7f2;border-radius:18px;padding:18px 8px}.clock strong{display:block;font-size:40px;font-variant-numeric:tabular-nums}.clock small{font-size:14px}.status{border-top:1px solid var(--line);padding-top:16px}.actions{display:flex;gap:12px;flex-wrap:wrap}.actions button{flex:1 1 auto}.method{margin:38px 0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{border:1px solid var(--line);background:#fff;border-radius:16px;padding:20px}.number{display:block;font-weight:800;color:var(--teal);font-size:14px;margin-bottom:8px}.card p{margin:0;font-size:16px}.references{padding:20px 0 30px;font-size:16px;border-top:1px solid var(--line)}.references li{margin:6px 0}footer{padding:22px 0 40px;border-top:1px solid var(--line);font-size:15px;display:flex;gap:20px;flex-wrap:wrap}.skip{position:absolute;top:-100px;left:10px;background:white;padding:10px;z-index:2}.skip:focus{top:5px}[hidden]{display:none!important}
@media(max-width:760px){.choices-grid,.cards{grid-template-columns:1fr 1fr}.hero{grid-template-columns:1fr 110px}.hero img{width:110px}.topbar{align-items:flex-start}.brand{font-size:21px}}
@media(max-width:480px){body{font-size:17px}header,main,footer{width:calc(100% - 28px)}.hero{grid-template-columns:1fr;padding-top:28px}.hero img{display:none}.choices-grid,.cards,.session-grid{grid-template-columns:1fr}form,.session,.safety{padding:20px}.clock{display:flex;align-items:center;justify-content:center;gap:15px}.clock strong{font-size:32px}#instruction{font-size:22px}.topbar{gap:12px}.back{font-size:15px}.actions{flex-direction:column}.actions button{width:100%}.start-row .primary{width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media print{header,footer,form,.session,.hero img{display:none!important}body{background:#fff;color:#000;font-size:12pt}main{width:100%}.cards{grid-template-columns:1fr 1fr}.card,.safety{break-inside:avoid;box-shadow:none}.hero{display:block;padding:0}h1{font-size:28pt}.references{font-size:10pt}}

.guides{margin:24px 0;border:1px solid var(--line);border-radius:20px;background:#f6f9ed;padding:20px}.guides-heading{display:flex;justify-content:space-between;gap:14px;align-items:center}.guides-heading h3{margin:12px 0 0;font-size:25px}.illustration-label{font-size:13px;color:#345767}.guides canvas{display:block;width:min(100%,440px);height:auto;margin:0 auto;max-height:560px;object-fit:contain}.guides figcaption p{margin:10px 0}.guide-controls{display:flex;gap:10px;flex-wrap:wrap}.guide-controls button{font-size:15px;flex:1;min-height:48px}.guide-controls button:disabled{color:#345767;background:#eef7f2;border-color:#71908a;opacity:1}.guides .hint{font-size:14px}#guide-caption{font-size:15px;color:#345767}@media(max-width:480px){.guides{padding:12px;margin-left:-8px;margin-right:-8px}.guides-heading h3{font-size:21px}.guides-heading{align-items:start}.illustration-label{max-width:85px}.guide-controls{flex-direction:column}.guides canvas{max-height:none}}
.session .actions{position:sticky;bottom:8px;background:#fff;padding:10px 0;border-radius:12px;z-index:1}