:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Tahoma,Arial,sans-serif;color:#171717;background:#f1f2f3;--ink:#111;--line:#d9dcde;--muted:#65696d;--blue:#2f6fed;--green:#14a38b;--gold:#c6a45e}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:#f1f2f3}.tool-header{position:sticky;top:0;z-index:50;min-height:70px;padding:10px clamp(14px,4vw,52px);display:flex;align-items:center;justify-content:space-between;gap:18px;background:#111;color:#fff;border-bottom:1px solid #ffffff18}.tool-header img{display:block;width:132px;height:49px;object-fit:contain;background:#fff;border-radius:5px}.tool-header nav{display:flex;gap:7px}.tool-header a{color:#eee;text-decoration:none;border:1px solid #ffffff25;border-radius:10px;padding:9px 12px;font-size:12px}.tool-header a:hover,.tool-header a:focus-visible{background:#fff;color:#111;outline:0}.tool-main{width:min(1120px,100%);margin:auto;padding:34px 20px 70px}.tool-hero{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:end;margin-bottom:24px}.tool-hero .eyebrow{margin:0 0 8px;color:var(--accent,var(--blue));font-size:10px;font-weight:900;letter-spacing:.16em}.tool-hero h1{font-size:clamp(34px,5vw,61px);line-height:1.02;margin:0}.tool-hero p{max-width:610px;color:var(--muted);line-height:1.8;margin:13px 0 0}.hero-mark{display:grid;place-items:center;width:92px;height:92px;border-radius:26px;background:var(--accent,var(--blue));color:#fff;font-size:42px;box-shadow:0 18px 38px color-mix(in srgb,var(--accent,var(--blue)),transparent 70%)}.calculator-shell{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);gap:12px;align-items:start}.calc-card,.result-panel,.info-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:0 7px 28px #0000000a}.calc-card h2,.result-panel h2{font-size:18px;margin:0 0 16px}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.field{display:flex;flex-direction:column;gap:7px}.field.full{grid-column:1/-1}.field label{font-size:12px;font-weight:800}.field small{color:var(--muted);font-size:10px;line-height:1.5}.field input,.field select{width:100%;min-height:48px;border:1px solid #cfd3d6;border-radius:12px;background:#fafafa;padding:10px 12px;color:#171717;font:inherit;font-size:15px;outline:0}.field input:focus,.field select:focus{border-color:var(--accent,var(--blue));box-shadow:0 0 0 3px color-mix(in srgb,var(--accent,var(--blue)),transparent 86%)}.convert-row{display:grid;grid-template-columns:1fr auto 1fr;gap:8px;align-items:end}.swap{width:44px;height:48px;border:0;border-radius:12px;background:#111;color:#fff;font-size:18px;cursor:pointer}.primary-result{padding:20px;border-radius:17px;background:linear-gradient(145deg,#111,#2a2a2a);color:#fff}.primary-result small{color:#c9ccce}.primary-result strong{display:block;margin:7px 0;font-size:clamp(30px,5vw,51px);line-height:1;overflow-wrap:anywhere}.primary-result span{font-size:13px;color:#e0e2e3}.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}.metric{padding:13px;border:1px solid var(--line);border-radius:13px;background:#fafafa}.metric b{display:block;font-size:19px}.metric span{display:block;color:var(--muted);font-size:10px;margin-top:5px}.breakdown{display:grid;gap:7px;margin-top:12px}.breakdown div{display:flex;justify-content:space-between;gap:12px;padding-bottom:7px;border-bottom:1px dashed #ddd;font-size:12px}.breakdown span{color:var(--muted)}.status-note{margin-top:12px;padding:11px 12px;border-radius:12px;background:#eef4ff;color:#244a9a;font-size:11px;line-height:1.7}.status-note.warn{background:#fff3d8;color:#755000}.engineering-note{margin:18px 0 0;padding:14px 16px;border-right:4px solid var(--accent,var(--blue));border-radius:10px;background:#fff;color:#5f6367;font-size:11px;line-height:1.8}.tool-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:17px}.tool-links a{background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 11px;color:#222;text-decoration:none;font-size:11px}.academy-hero{--accent:var(--gold)}.video-section{margin-top:28px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:13px}.section-head h2{font-size:24px;margin:0}.section-head p{margin:0;color:var(--muted);font-size:12px}.series-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}.series-card{position:relative;overflow:hidden;min-height:235px;padding:18px;border:1px solid var(--line);border-radius:19px;background:#fff}.series-card::after{content:"";position:absolute;width:130px;height:130px;left:-45px;bottom:-50px;border-radius:50%;background:var(--series,#2f6fed);opacity:.11}.series-card .play{display:grid;place-items:center;width:47px;height:47px;border-radius:50%;background:var(--series,#2f6fed);color:#fff;margin-bottom:35px}.series-card h3{font-size:18px;margin:0}.series-card p{color:var(--muted);font-size:12px;line-height:1.7}.series-card span{position:absolute;right:18px;bottom:16px;color:var(--series,#2f6fed);font-size:10px;font-weight:900}.series-card:nth-child(2){--series:#14a38b}.series-card:nth-child(3){--series:#e0a216}.series-card:nth-child(4){--series:#7058d9}.series-card:nth-child(5){--series:#2699db}.series-card:nth-child(6){--series:#e45647}.academy-cta{display:grid;grid-template-columns:1fr auto;align-items:center;gap:22px;margin-top:14px;padding:22px;border-radius:20px;background:#111;color:#fff}.academy-cta h2{margin:0 0 7px}.academy-cta p{margin:0;color:#c7c9ca;font-size:12px}.academy-cta a{background:#fff;color:#111;text-decoration:none;border-radius:12px;padding:12px 16px;font-weight:800;font-size:12px}.tool-footer{text-align:center;color:#777;font-size:10px;padding:24px}
@supports not (color:color-mix(in srgb,#000,#fff)){.hero-mark{box-shadow:0 18px 38px #0002}}
.main-site-link{border-color:var(--gold)!important;color:#e8c982!important;font-weight:800;white-space:nowrap}.main-site-link:hover,.main-site-link:focus-visible{background:var(--gold)!important;color:#111!important}.language-switch{display:flex;gap:3px;padding:3px;border:1px solid #ffffff30;border-radius:11px;background:#ffffff10}.language-switch button{border:0;border-radius:8px;background:transparent;color:#bbb;padding:8px 10px;font:inherit;font-size:11px;cursor:pointer}.language-switch button.active{background:#fff;color:#111;font-weight:900}.language-switch button:focus-visible{outline:2px solid var(--accent,#2f6fed);outline-offset:2px}[dir="ltr"] .engineering-note{border-right:0;border-left:4px solid var(--accent,var(--blue))}[dir="ltr"] .series-card span:last-child{right:auto;left:18px}[dir="ltr"] .tool-main,[dir="ltr"] .tool-header{text-align:left}

/* Academy: neutral surfaces with muted color reserved for the series icons. */
.academy-page .series-card,.academy-page .series-card:nth-child(n){border-color:#c6a45e66;background:linear-gradient(145deg,#fff,#f7f3ea)}
.academy-page .series-card::after{content:none}
.academy-page .series-card:nth-child(1){--series:#5f7182}.academy-page .series-card:nth-child(2){--series:#62766c}.academy-page .series-card:nth-child(3){--series:#8a7345}.academy-page .series-card:nth-child(4){--series:#736978}.academy-page .series-card:nth-child(5){--series:#607784}.academy-page .series-card:nth-child(6){--series:#85675f}
.academy-page .series-card .play{background:var(--series);color:#fff;box-shadow:0 8px 22px #00000018}
.academy-page .series-card span{color:#8a691f}
.academy-page .series-card span:last-child{color:#8a6d32}
@media(max-width:760px){.tool-header{gap:8px}.main-site-link{font-size:0!important;padding:9px 10px!important}.main-site-link::before{content:"ENGEX ↗";font-size:10px}.tool-header img{width:104px;height:41px}.tool-header nav{display:none}.language-switch{margin-inline-start:auto}.language-switch button{padding:7px 8px}.tool-main{padding:25px 12px 55px}.tool-hero{grid-template-columns:1fr}.hero-mark{display:none}.calculator-shell{grid-template-columns:1fr}.series-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.academy-cta{grid-template-columns:1fr}.academy-cta a{text-align:center}.section-head p{display:none}}
@media(max-width:500px){.field-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.convert-row{grid-template-columns:1fr 42px 1fr}.series-grid{grid-template-columns:1fr}.series-card{min-height:210px}.tool-header img{width:112px;height:43px}.tool-header a{padding:8px 9px}}