:root{color-scheme:dark;--bg:#10110f;--panel:#1a1c19;--panel-2:#242622;--ink:#f4f4ee;--muted:#b3b5aa;--line:rgba(255,255,255,.12);--lime:#d8ff5c;--lime-dark:#172000}*{box-sizing:border-box}body{min-width:320px;margin:0;background:radial-gradient(circle at 85% -10%,#45521a 0,transparent 30rem),var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit;text-decoration:none}.shell{width:min(1120px,calc(100% - 48px));margin:auto}.topbar{display:flex;align-items:center;justify-content:space-between;min-height:80px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.05em}.brand-mark{display:grid;width:30px;height:30px;place-items:center;border-radius:9px;background:var(--lime);color:#151710;font-size:1.1rem}.nav{display:flex;align-items:center;gap:19px;color:var(--muted);font-size:.9rem}.nav a:hover{color:white}.language-select{appearance:none;padding:8px 26px 8px 10px;border:1px solid var(--line);border-radius:99px;background:linear-gradient(45deg,transparent 50%,#e8e8dd 50%) calc(100% - 12px) 52%/5px 5px no-repeat,linear-gradient(135deg,#e8e8dd 50%,transparent 50%) calc(100% - 8px) 52%/5px 5px no-repeat,transparent;color:#e8e8dd;font:inherit;font-size:.76rem;font-weight:800;letter-spacing:.06em}.hero{display:grid;grid-template-columns:1fr minmax(340px,.85fr);gap:clamp(50px,9vw,125px);align-items:center;padding:clamp(75px,12vw,142px) 0 122px}.eyebrow{margin:0 0 20px;color:var(--lime);font-size:.75rem;font-weight:800;letter-spacing:.15em;text-transform:uppercase}h1{max-width:570px;margin:0 0 22px;font-size:clamp(3.7rem,7vw,6.5rem);line-height:.91;letter-spacing:-.085em}.copy{max-width:520px;margin:0;color:var(--muted);font-size:1.1rem;line-height:1.6}.store-note{margin:28px 0 0;color:#d5d6cd;font-size:.88rem}.calculator{overflow:hidden;border:1px solid rgba(216,255,92,.34);border-radius:22px;background:#171916;box-shadow:0 24px 70px rgba(0,0,0,.35)}.display{min-height:160px;padding:25px 26px 18px;text-align:right;background:linear-gradient(135deg,#292d20,#1b1d19)}.display small{display:block;min-height:23px;color:#a9b099;font-size:.87rem;overflow:hidden;text-overflow:ellipsis}.value{margin-top:21px;overflow:hidden;color:#fbfbed;font-size:clamp(2.4rem,5vw,3.6rem);font-weight:700;letter-spacing:-.07em;text-overflow:ellipsis;white-space:nowrap}.keys{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}.key{min-height:62px;border:0;background:var(--panel);color:var(--ink);font-size:1.1rem;cursor:pointer;transition:background .15s}.key:hover{background:var(--panel-2)}.key--operator{color:var(--lime);font-weight:800}.key--clear{color:#ffb8a9}.key--equals{background:var(--lime);color:var(--lime-dark);font-weight:900}.key--equals:hover{background:#e2ff81}.section{padding:0 0 112px}.feature-head{display:flex;justify-content:space-between;gap:35px;align-items:end;margin-bottom:30px;border-top:1px solid var(--line);padding-top:28px}.feature-head h2{margin:0;font-size:clamp(2rem,4vw,3.6rem);line-height:.98;letter-spacing:-.065em}.feature-head p{max-width:410px;margin:0;color:var(--muted);line-height:1.58}.features{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.feature{padding:26px;min-height:220px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.02)}.feature span{display:block;margin-bottom:50px;color:var(--lime);font-size:.75rem;font-weight:800;letter-spacing:.1em}.feature h3{margin:0 0 10px;font-size:1.3rem;letter-spacing:-.04em}.feature p{margin:0;color:var(--muted);font-size:.94rem;line-height:1.55}.footer{display:flex;justify-content:space-between;padding:27px 0 42px;border-top:1px solid var(--line);color:#909286;font-size:.8rem}.error{display:grid;min-height:calc(100vh - 160px);place-items:center;text-align:center}.error h1{margin:0 0 16px;font-size:clamp(5rem,14vw,10rem)}.error p{max-width:450px;margin:0;color:var(--muted);line-height:1.6}.error a{margin-top:28px;padding:13px 18px;border-radius:99px;background:var(--lime);color:var(--lime-dark);font-weight:800}@media(max-width:760px){.shell{width:min(100% - 32px,1120px)}.topbar{min-height:68px}.nav{gap:10px;font-size:.82rem}.nav>a{display:none}.hero{grid-template-columns:1fr;padding-top:76px}.feature-head{display:grid}.features{grid-template-columns:1fr}.feature{min-height:180px}.feature span{margin-bottom:28px}.footer{display:block}.footer span+span{display:block;margin-top:8px}}