:root{color-scheme:light;--ink:#11182d;--muted:#66718b;--blue:#315cff;--line:#e8edf6}
*{box-sizing:border-box}
body{margin:0;background:#f7f9fe;color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.6}
.shell{max-width:1160px;margin:auto;padding:0 36px}
.header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:32px 0}
.brand{display:flex;align-items:center;gap:13px;color:var(--ink);text-decoration:none;font-size:25px;font-weight:800;letter-spacing:-1px}
.logo{display:grid;place-items:center;width:48px;height:48px;border-radius:16px;background:linear-gradient(145deg,#559bff,#3449ff);color:white;font-size:39px;line-height:1;box-shadow:0 8px 18px #315cff24}
.badge{font-size:12px;font-weight:650;background:#edf1ff;color:#3b54a8;padding:8px 14px;border-radius:30px;text-align:center}
.hero{display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:76px;padding:60px 0 78px}
.eyebrow{font-size:12px;font-weight:750;letter-spacing:1.6px;text-transform:uppercase;color:var(--blue);margin:0 0 18px}
h1{font-size:clamp(40px,5.5vw,65px);letter-spacing:-3px;line-height:1.12;margin:0 0 25px;font-weight:800}
h1 span{color:var(--blue)}
.lead{font-size:18px;color:var(--muted);max-width:450px;margin:0 0 30px}
.button{display:inline-flex;align-items:center;gap:25px;padding:15px 23px;border-radius:17px;background:linear-gradient(110deg,#448cff,#3153ff);color:#fff;font-weight:650;font-size:15px;text-decoration:none;box-shadow:0 10px 24px #315cff25}
.button:hover{background:#264bdf}.button:focus-visible,.brand:focus-visible{outline:3px solid #162f99;outline-offset:5px}
.hint{font-size:12px;color:var(--muted);margin-top:16px}
.preview{background:#fff;border:1px solid var(--line);padding:25px;border-radius:32px;box-shadow:0 25px 70px #4054800b}
.preview-title{display:flex;align-items:center;gap:9px;font-size:13px;font-weight:700;margin:0 0 20px}
.dot{width:8px;height:8px;background:var(--blue);border-radius:50%}
.note{display:flex;align-items:flex-start;gap:15px;padding:17px;border:1px solid var(--line);border-radius:20px;margin-top:12px}
.symbol{display:grid;place-items:center;flex:0 0 39px;height:39px;border-radius:13px;font-size:25px;background:#edf2ff;color:#315cff}
.amber .symbol{background:#fff3da;color:#946100}.violet .symbol{background:#f1eaff;color:#7941c3}
.note small{font-size:11px;font-weight:650;color:#4964b1}.amber small{color:#946100}.violet small{color:#7941c3}
.note strong{display:block;font-size:14px;line-height:1.4;margin:3px 0 5px}.note p{font-size:12px;color:var(--muted);margin:0}
.preview-caption{font-size:10px;color:var(--muted);margin:17px 0 0}
.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.features article{border-radius:25px;background:white;border:1px solid var(--line);padding:25px}
.number{color:#4760ae;font-size:12px;font-weight:750;background:#edf1ff;padding:7px 11px;border-radius:10px}
h2{font-size:23px;letter-spacing:-.6px;line-height:1.3;margin:18px 0 10px}.features p{margin:0;font-size:14px;color:var(--muted)}
.testing{display:grid;grid-template-columns:1fr 1.5fr;gap:65px;padding:35px;margin:32px 0 50px;background:#edf2ff;border-radius:26px}
.testing h2{margin:0;max-width:300px}.testing .eyebrow{margin-bottom:12px}.testing p:not(.eyebrow){font-size:13px;color:#525e7a;margin:0 0 12px}.testing p:last-child{margin:0}
footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:24px 0 35px;font-size:12px;color:var(--muted)}footer span:first-child{color:var(--ink);font-weight:750}
@media(max-width:850px){.hero{gap:30px;padding-top:35px}h1{letter-spacing:-2px}.preview{padding:18px}.note{padding:13px;gap:10px}.testing{gap:25px}}
@media(max-width:650px){.shell{padding:0 20px}.header{padding:22px 0}.brand{font-size:22px}.logo{width:40px;height:40px;border-radius:13px;font-size:32px}.badge{font-size:10px;padding:6px 10px;max-width:125px}.hero{grid-template-columns:1fr;padding:35px 0;gap:35px}h1{font-size:43px;letter-spacing:-2px}.lead{font-size:16px}.preview{max-width:440px;width:100%;padding:21px}.features{grid-template-columns:1fr;gap:12px}.features article{padding:23px}.testing{grid-template-columns:1fr;gap:20px;padding:25px;margin:25px 0 30px}footer{flex-direction:column;gap:5px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}