:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#173142;background:#f5f7f7;font-size:16px;line-height:1.6;color-scheme:light}
*{box-sizing:border-box}body{margin:0}.demo-banner{background:#e3f0ed;color:#23584f;text-align:center;padding:9px 18px;font-size:.76rem;letter-spacing:.04em;font-weight:650}.masthead{max-width:1220px;margin:auto;display:flex;align-items:center;gap:12px;padding:25px 30px;border-bottom:1px solid #dce3e5;font-size:.74rem;letter-spacing:.09em;font-weight:700}.mark{display:grid;place-items:center;width:31px;height:31px;border-radius:8px;background:#176e68;color:white;font:700 20px Georgia}.estimate{margin-left:auto;color:#5a717e;font-size:.75rem;letter-spacing:0;font-weight:500}main{max-width:1160px;margin:auto;padding:38px 28px}.heading{margin-bottom:29px}.eyebrow{font-size:.69rem;font-weight:750;letter-spacing:.17em;color:#247269;margin:0 0 12px}h1{font-family:Georgia,serif;font-weight:500;font-size:clamp(2rem,4vw,3.25rem);line-height:1.16;letter-spacing:-.025em;margin:0 0 15px}.subtitle{color:#5e727d;margin:0}h2{font-size:1.5rem;line-height:1.3;margin:0 0 16px}h3{font-size:1.05rem;line-height:1.45}p{margin:0 0 16px}#progress{display:flex;gap:0;margin:0 0 25px;max-width:700px}.step{flex:1;border-top:3px solid #d9e2e4;padding-top:9px;font-size:.75rem;color:#627780}.step.current{border-color:#17796e;color:#135b52;font-weight:700}.step.done{border-color:#89b5ac}#layout{display:grid;grid-template-columns:minmax(0,1fr);gap:25px;align-items:start}#layout.with-guide{grid-template-columns:minmax(0,1.5fr) minmax(290px,1fr)}#app{background:white;border:1px solid #dce5e6;border-radius:15px;padding:30px;box-shadow:0 6px 22px #18313a04;min-width:0}#guide{background:#eef3f2;border:1px solid #d6e2df;border-radius:12px;padding:24px;min-width:0}#guide h2{font-size:1.2rem}#guide h3{color:#205c54;margin-bottom:9px}#guide p{font-size:.92rem;line-height:1.65;color:#344d58}#guide summary{cursor:pointer;font-weight:700}#guide .disclaimer{font-size:.81rem;border-top:1px solid #cddbd8;padding-top:15px;margin-top:20px}.note{background:#edf5f2;border-left:3px solid #72a598;padding:15px 18px;border-radius:4px;color:#2d584e;font-size:.92rem}.muted{color:#5c717c;font-size:.9rem}button{font:inherit;font-size:.95rem;font-weight:650;border:1px solid #176e68;border-radius:7px;background:#176e68;color:#fff;padding:11px 20px;cursor:pointer;min-height:46px}button:hover{background:#105d58}button:disabled{opacity:.58;cursor:wait}.secondary{background:white;color:#245a58;border-color:#b8ceca}.secondary:hover{background:#edf5f3}.quiet{background:transparent;color:#5b6370;border:1px solid #c8d2d5;font-weight:500;font-size:.84rem;padding:8px 12px}.quiet:hover{background:#f0f3f4}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:23px;align-items:center}.exit-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:27px;border-top:1px solid #e2e8e9;padding-top:20px}fieldset{border:0;border-bottom:1px solid #e4eaeb;padding:0 0 22px;margin:0 0 22px;min-width:0}legend{font-weight:650;margin-bottom:11px;width:100%;padding:0}.choice{display:flex;align-items:flex-start;gap:9px;font-size:.94rem;margin:8px 0;padding:4px 0}.choice input{margin-top:6px;accent-color:#176e68;flex-shrink:0;width:16px;height:16px}.field{display:block;font-weight:650;margin:19px 0 8px;font-size:.95rem}textarea,input[type=text],select{width:100%;font:inherit;border:1px solid #acbfc5;border-radius:7px;padding:11px 12px;background:#fff;color:#173142}textarea{min-height:100px;resize:vertical;line-height:1.5;font-size:1rem}input[type=text]{max-width:430px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #83cbbf;outline-offset:3px}.case-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:18px}.case-top h2{margin:0}.timer{font-variant-numeric:tabular-nums;font-size:1rem;font-weight:700;white-space:nowrap;padding:7px 12px;background:#eaf4f1;border-radius:6px;color:#195d53}.timer.urgent{background:#fff0dd;color:#935017}.facts{border-top:1px solid #dce5e6;border-bottom:1px solid #dce5e6;padding:18px 0 2px}.facts p{font-size:.94rem}.saved{font-size:.82rem;color:#517367;margin-top:9px;margin-bottom:0;min-height:24px}#error{background:#fff1e8;border:1px solid #e4b497;border-radius:8px;padding:14px 17px;color:#7b3b1d;max-width:850px}footer{font-size:.77rem;color:#62747d;border-top:1px solid #dce5e6;margin-top:31px;padding-top:19px}footer p{margin:0 0 5px}.code{display:block;font-family:ui-monospace,monospace;font-size:.86rem;overflow-wrap:anywhere;background:#edf3f3;padding:12px;border-radius:6px;margin-bottom:18px}.debrief{border-top:1px solid #dce5e6;padding-top:18px;margin-top:25px}[hidden]{display:none!important}
.case-top{position:sticky;top:0;background:white;z-index:2;padding:10px 0;border-bottom:1px solid #dce5e6}
@media(min-width:950px){#guide{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto}}
@media(max-width:800px){#layout.with-guide{grid-template-columns:minmax(0,1fr)}#guide{order:-1}#guide details:not([open]){padding:0}.masthead{padding:18px 20px}main{padding:28px 18px}.heading{margin-bottom:24px}#app{padding:23px}}
@media(max-width:430px){.estimate{max-width:65px;font-size:.7rem;text-align:right}.masthead{font-size:.62rem;gap:9px}#app{padding:19px}#progress .step{font-size:.66rem}.demo-banner{font-size:.64rem}button{width:100%}.case-top{gap:8px}.case-top h2{font-size:1.28rem}.timer{padding:6px 8px}}