*{box-sizing:border-box}
:root{--navy:#062b50;--navy2:#073e6e;--blue:#075bc0;--gold:#f1b900;--green:#11751e;--ink:#10233b;--muted:#657586;--line:#d7e0e8;--bg:#f3f6f8}
html,body{margin:0;padding:0;background:var(--bg);font-family:Arial,Helvetica,sans-serif;color:var(--ink)}
body{min-width:320px}.page{max-width:1500px;margin:0 auto;background:#fff;min-height:100vh;overflow:hidden}
.topbar{background:linear-gradient(105deg,#031e38,#073e6e);border-bottom:3px solid var(--gold);color:#fff}.topbar-inner{min-height:116px;padding:13px 45px;display:flex;align-items:center;justify-content:space-between;gap:35px}
.brand{flex:0 0 305px;display:block}.brand img{width:285px;max-height:78px;display:block;object-fit:contain;object-position:left center}
.features{display:flex;align-items:stretch;justify-content:flex-end;flex:1}.feature{display:flex;align-items:center;gap:10px;padding:0 28px;border-left:1px solid rgba(255,255,255,.38);min-width:205px}.feature:first-child{border-left:0}.feature i{font-style:normal;color:var(--gold);font-size:28px;line-height:1}.feature b{display:block;font-size:13px;letter-spacing:.3px;white-space:nowrap}.feature span{display:block;font-size:11px;color:#e6edf4;white-space:nowrap;margin-top:3px}
.hero{min-height:0;padding:30px 52px 22px;background:#fff}.hero-copy{max-width:100%}.eyebrow{font-size:10px;letter-spacing:1.4px;font-weight:800;color:#b47e00;margin-bottom:6px}.hero h1{margin:0 0 7px;color:#092f55;font-size:33px;line-height:1.08;text-transform:uppercase;white-space:nowrap}.hero p{margin:0;font-size:17px;color:#172b42;max-width:730px}
main{padding:0 44px 20px}.top-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:11px;overflow:hidden;box-shadow:0 4px 16px rgba(8,44,78,.08)}.card-header{height:45px;padding:0 20px;background:linear-gradient(90deg,#052b50,#073e6e);display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:800;text-transform:uppercase}.card-header span{color:var(--gold);font-size:19px}.card-body{padding:19px}
.mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}.mode{min-height:154px;padding:10px;border:1px solid #cbd7e0;border-radius:9px;background:#fff;color:#5c7082;font:inherit;text-align:center;cursor:pointer;overflow:hidden}.mode img{display:block;width:150px;height:72px;object-fit:contain;margin:0 auto}.mode b{display:block;margin-top:6px;color:#173755;font-size:12px}.mode small{display:block;margin-top:5px;color:#647586;font-size:10.5px;line-height:1.3}.mode.active{background:#e9f2fa;border-color:#075bc0;box-shadow:0 3px 10px rgba(7,91,192,.13)}.mode.active b{color:#062b50}.mode.active::after{content:"";display:block;width:28px;height:3px;border-radius:3px;background:#f1b900;margin:7px auto 0}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:13px 20px}.field.full{grid-column:1/-1}.field label{display:block;font-size:13px;font-weight:800;margin-bottom:6px}.row{display:flex;gap:8px}input,select{width:100%;height:43px;border:1px solid #c7d2dc;border-radius:7px;background:#fff;color:var(--ink);font:inherit;font-size:15px;padding:0 11px;outline:none}input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(7,91,192,.12)}.row select{max-width:105px}.static{min-width:62px;height:43px;border:1px solid #c7d2dc;border-radius:7px;background:#f5f8fa;color:var(--muted);display:grid;place-items:center;font-size:13px;font-weight:700}.field small{font-size:11px;color:var(--muted);margin-top:5px;display:block}.action{margin-top:14px}.primary{width:100%;height:46px;border:0;border-radius:7px;background:#062f58;color:#fff;font-size:17px;font-weight:800;cursor:pointer}.primary:hover{background:#074675}.button-icon{color:var(--gold);font-size:19px;vertical-align:-1px}.secondary{width:100%;border:0;background:transparent;color:#5d6d7b;font-size:11px;cursor:pointer;margin-top:6px}.error{display:none;margin-top:11px;padding:9px 11px;background:#fff0f0;border:1px solid #efc8c8;border-radius:7px;color:#a22d2d;font-size:12px}.hidden{display:none!important}
.main-result{border:1px solid #cde2cf;background:#f3faf3;border-radius:10px;text-align:center;padding:17px 10px}.main-result span{display:block;font-size:13px;font-weight:800;color:var(--green)}.main-result-illustration{display:block;width:min(280px,100%);height:72px;object-fit:contain;margin:4px auto 6px}.main-result strong{display:block;color:var(--green);font-size:36px;line-height:1.05;margin:7px 0 2px}.main-result small{font-size:15px;font-weight:700;color:var(--green)}.results-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:12px}.result{border:1px solid var(--line);border-radius:9px;padding:11px 6px;text-align:center}.result span{display:block;font-size:10px;font-weight:800;color:#19314d}.result strong{display:block;font-size:19px;color:#082d54;margin-top:6px;white-space:nowrap}.result small{font-size:11px;color:#586878}
.bottom-grid{display:grid;grid-template-columns:minmax(0,2.3fr) minmax(270px,.8fr);gap:18px;margin-top:18px}.memory{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px;padding:17px}.step{margin-bottom:17px}.step h3{font-size:13px;color:#0b3158;margin:0 0 7px}.equation{display:inline-block;padding:6px 9px;background:#f7f9fb;border:1px solid var(--line);border-radius:6px;font-family:Georgia,serif;font-style:italic;font-size:14px}.step p{font-size:12px;margin:7px 0 0;color:#3f5162;line-height:1.45}.real{border:1px solid var(--line);border-radius:9px;padding:13px;margin-bottom:10px;font-size:12px}.real b{display:block;margin-bottom:6px}.real span{font-weight:700}.real.green{background:#f5fbf5}.real.green b,.real.green span{color:var(--green)}.real.blue{background:#f4f8fd}.real.blue b,.real.blue span{color:var(--blue)}
.important{background:linear-gradient(145deg,#06294b,#06385f);color:#fff;border-radius:10px;padding:20px 21px}.important-title{font-size:17px;font-weight:800;color:var(--gold);margin-bottom:13px}.important p{font-size:12.5px;line-height:1.55;margin:0 0 14px}.important hr{border:0;border-top:1px solid rgba(255,255,255,.25);margin:13px 0}
footer{min-height:72px;background:#032848;border-top:2px solid var(--gold);padding:11px 44px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#fff}.footer-brand img{width:155px;max-height:42px;object-fit:contain}.footer-text{font-size:11px}.website{font-size:16px;color:var(--gold);font-weight:800;white-space:nowrap}
@media(max-width:1120px){.features{gap:0}.feature{padding:0 13px;min-width:160px}.feature span{font-size:10px}.hero h1{white-space:normal}.bottom-grid{grid-template-columns:1fr}.memory{grid-template-columns:1fr 1fr}}
@media(max-width:800px){.topbar-inner{padding:12px 18px;min-height:80px}.brand{flex-basis:auto}.brand img{width:215px}.features{display:none}.hero{padding:22px 18px 20px}.hero h1{font-size:27px}.hero p{font-size:15px}main{padding:0 12px 15px}.top-grid,.fields,.memory,.mode-tabs{grid-template-columns:1fr}.results-grid{grid-template-columns:1fr 1fr}.card-header{padding:0 15px;font-size:15px}.card-body{padding:15px}footer{padding:12px 18px;flex-direction:column;align-items:flex-start;gap:7px}.footer-text{font-size:10px}.website{font-size:14px}}