.feu-hero{padding-top:28px;background:linear-gradient(180deg,#f8fbff 0,#eef3f9 100%)}.feu-breadcrumb{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:21px;color:#64748b;font:10px Inter,sans-serif}.feu-breadcrumb a{color:#1d4ed8;text-decoration:none}.feu-breadcrumb a:hover{text-decoration:underline}.feu-hero-grid{align-items:start;gap:34px}.feu-lead{max-width:680px;color:#475569;font:14px/1.75 Inter,sans-serif}.feu-direct{margin:17px 0;padding:13px 15px;border:1px solid #bfdbfe;border-left:4px solid #3b82f6;border-radius:9px;background:#eff6ff;color:#1e3a8a;font:12px/1.55 Inter,sans-serif}.feu-stats{grid-template-columns:repeat(3,1fr);margin:17px 0}.feu-stats .stat-val{font-size:17px}.feu-stats .stat-label{font-size:8px}
.feu-card{padding:23px;border:1px solid #e2e8f0;border-radius:15px;background:#fff;box-shadow:0 18px 45px rgba(29,53,87,.12)}.feu-card-head,.feu-result-head{display:flex;justify-content:space-between;gap:12px;align-items:start;margin-bottom:16px}.feu-card-head span,.feu-result-head span{color:#e63946;font:700 9px Inter,sans-serif;letter-spacing:.07em;text-transform:uppercase}.feu-card-head h2,.feu-result-head h2{margin:3px 0 0;font-size:18px}.feu-card-head>b{padding:5px 8px;border-radius:99px;background:#dcfce7;color:#166534;font:700 9px Lexend,sans-serif}.feu-unit-switch{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:0 0 10px;padding:9px 10px;border:1px solid #dbe3ed;border-radius:10px;background:#fff}.feu-unit-switch>span{margin-right:auto;color:#475569;font:700 9px Lexend,sans-serif;text-transform:uppercase}.feu-unit-switch label{cursor:pointer}.feu-unit-switch input{position:absolute;opacity:0;pointer-events:none}.feu-unit-switch label span{display:block;padding:7px 11px;border:1px solid #dbe3ed;border-radius:8px;color:#64748b;font:700 9px Lexend,sans-serif}.feu-unit-switch input:checked+span{border-color:#1d3557;background:#1d3557;color:#fff}.feu-unit-switch input:focus-visible+span{outline:3px solid rgba(29,53,87,.18)}.feu-sample-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.feu-group{margin:0;padding:13px;border:1px solid #e2e8f0;border-radius:12px;background:#f8fafc}.feu-group legend,.feu-context legend{padding:0 6px;color:#1d3557;font:700 9px Lexend,sans-serif;text-transform:uppercase;letter-spacing:.04em}.feu-group label{display:block;margin-bottom:10px;color:#475569;font:700 9px Lexend,sans-serif}.feu-group label:last-child{margin-bottom:0}.feu-group label small{display:block;margin:2px 0 5px;color:#94a3b8;font:400 8px Inter,sans-serif}.feu-input-wrap{position:relative;display:block}.feu-input-wrap input{box-sizing:border-box;width:100%;padding:11px 58px 11px 10px;border:1.5px solid #dbe3ed;border-radius:9px;background:#fff;color:#1d3557;font:700 14px Lexend,sans-serif}.feu-input-wrap input:focus{outline:0;border-color:#1d3557;box-shadow:0 0 0 3px rgba(29,53,87,.1)}.feu-input-wrap>b{position:absolute;top:50%;right:9px;transform:translateY(-50%);color:#64748b;font:700 7px Lexend,sans-serif}.feu-unit-note{margin:7px 0 10px;color:#64748b;font:9px/1.5 Inter,sans-serif}.feu-context{display:grid;grid-template-columns:1fr;gap:6px;margin:0 0 10px;padding:10px 12px;border:1px solid #fde68a;border-radius:10px;background:#fffbeb}.feu-context label{display:flex;gap:8px;align-items:start;cursor:pointer}.feu-context input{margin-top:2px;accent-color:#1d3557}.feu-context b,.feu-context small{display:block}.feu-context b{color:#78350f;font:600 8px Lexend,sans-serif}.feu-context small{margin-top:2px;color:#a16207;font:8px Inter,sans-serif}.feu-examples{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:12px}.feu-examples>span{color:#64748b;font:600 9px Lexend,sans-serif}.feu-examples button{padding:6px 9px;border:1px solid #cbd5e1;border-radius:99px;background:#fff;color:#1d3557;cursor:pointer;font:600 8px Lexend,sans-serif}.feu-examples button:hover{border-color:#1d3557;background:#eff6ff}.feu-error{display:none;margin:0 0 10px;padding:10px;border-radius:8px;background:#fff1f2;color:#be123c;font:600 11px/1.5 Inter,sans-serif}.feu-error.show{display:block}.feu-actions{display:grid;grid-template-columns:1fr auto;gap:8px}.feu-actions>button:last-child,.feu-print{padding:10px 13px;border:1px solid #cbd5e1;border-radius:9px;background:#fff;color:#475569;cursor:pointer;font:600 10px Lexend,sans-serif}.feu-actions>button:last-child:hover,.feu-print:hover{border-color:#94a3b8;background:#f8fafc}
.feu-result{margin-top:20px;padding-top:18px;border-top:1px solid #e2e8f0}.feu-result[hidden]{display:none}.feu-result-head{align-items:center;margin-bottom:0}.feu-result-head>b{padding:6px 9px;border-radius:99px;font:700 9px Lexend,sans-serif}.feu-result-head>b.is-low{background:#dcfce7;color:#166534}.feu-result-head>b.is-middle{background:#fffbeb;color:#92400e}.feu-result-head>b.is-high{background:#fff1f2;color:#be123c}.feu-main-value{padding:15px 0 8px;text-align:center}.feu-main-value strong{color:#1d3557;font:800 36px Lexend,sans-serif}.feu-main-value>span{margin-left:3px;color:#64748b;font:700 13px Lexend,sans-serif}.feu-main-value p{margin:4px 0 0;color:#475569;font:600 10px Inter,sans-serif}.feu-gauge{position:relative;height:10px;margin:7px 2px 3px;border-radius:99px;background:linear-gradient(90deg,#22c55e 0 33%,#f59e0b 33% 66%,#ef4444 66% 100%)}.feu-gauge i{position:absolute;top:50%;left:33%;width:15px;height:15px;border:3px solid #fff;border-radius:50%;background:#1d3557;box-shadow:0 1px 5px rgba(15,23,42,.35);transform:translate(-50%,-50%);transition:left .25s ease}.feu-gauge-labels{display:flex;justify-content:space-between;color:#94a3b8;font:7px Inter,sans-serif}.feu-result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-top:10px}.feu-result-grid>div{padding:11px 5px;border:1px solid #e2e8f0;border-radius:9px;background:#f8fafc;text-align:center}.feu-result-grid span,.feu-result-grid strong,.feu-result-grid small{display:block}.feu-result-grid span{color:#94a3b8;font:8px Inter,sans-serif;text-transform:uppercase}.feu-result-grid strong{margin:4px 0 2px;color:#1d3557;font:700 12px Lexend,sans-serif}.feu-result-grid small{color:#64748b;font:8px/1.3 Inter,sans-serif}.feu-working{margin:9px 0;padding:11px;border-radius:8px;background:#1d3557}.feu-working span{display:block;margin-bottom:4px;color:#bfdbfe;font:700 8px Inter,sans-serif;text-transform:uppercase}.feu-working code{display:block;color:#fff;font:600 9px/1.5 monospace;overflow-wrap:anywhere}.feu-working-light{margin-top:-2px;border:1px solid #bfdbfe;background:#eff6ff}.feu-working-light[hidden]{display:none}.feu-working-light span{color:#1d4ed8}.feu-working-light code{color:#1e3a8a}.feu-result-note{margin-top:9px;padding:10px;border-left:4px solid #22c55e;border-radius:7px;background:#f0fdf4;color:#166534;font:10px/1.5 Inter,sans-serif}.feu-result-note.is-middle{border-color:#f59e0b;background:#fffbeb;color:#92400e}.feu-result-note.is-high{border-color:#ef4444;background:#fff1f2;color:#991b1b}.feu-context-warning{margin-top:8px;padding:11px;border:1px solid #bfdbfe;border-radius:8px;background:#eff6ff}.feu-context-warning strong{display:block;color:#1e40af;font:700 9px Lexend,sans-serif}.feu-context-warning p{margin:5px 0 0;color:#1e3a8a;font:9px/1.5 Inter,sans-serif}.feu-context-warning.is-warn{border-color:#fde68a;background:#fffbeb}.feu-context-warning.is-warn strong{color:#92400e}.feu-context-warning.is-warn p{color:#78350f}.feu-source-warning{margin-top:8px;padding:10px;border-radius:7px;background:#f8fafc;color:#475569;font:9px/1.5 Inter,sans-serif}.feu-print{margin-top:9px}
.feu-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:30px;align-items:start}.feu-layout .main-article{min-width:0}.feu-formula{margin:18px 0;padding:18px;border-radius:11px;background:#1d3557;color:#fff;text-align:center;font:700 16px/1.45 Lexend,sans-serif}.feu-formula-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}.feu-formula-grid>div{padding:15px;border:1px solid #bfdbfe;border-radius:10px;background:#eff6ff}.feu-formula-grid span,.feu-formula-grid strong{display:block}.feu-formula-grid span{color:#1d4ed8;font:700 8px Inter,sans-serif;text-transform:uppercase}.feu-formula-grid strong{margin-top:5px;color:#1e3a8a;font:700 11px/1.45 Lexend,sans-serif}.feu-key{display:grid;grid-template-columns:1fr 1fr;gap:7px;padding:0;list-style:none}.feu-key li{padding:10px;border-radius:8px;background:#f8fafc;font-size:11px}.feu-note{margin:17px 0;padding:14px 16px;border:1px solid #bfdbfe;border-radius:10px;background:#eff6ff;color:#1e3a8a;font:12px/1.65 Inter,sans-serif}.feu-steps{padding:0;list-style:none}.feu-steps li{display:grid;grid-template-columns:30px 1fr;gap:12px;margin-bottom:9px;padding:13px;border:1px solid #e2e8f0;border-radius:10px;background:#fff}.feu-steps li>b{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:#e63946;color:#fff;font:700 10px Lexend,sans-serif}.feu-steps h3{margin:2px 0 5px;font-size:12px}.feu-steps p{margin:0;font-size:11px}.feu-worked-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}.feu-worked-grid>div{padding:18px;border:1px solid #e2e8f0;border-top:3px solid #1d3557;border-radius:11px;background:#fff}.feu-worked-grid>div+div{border-top-color:#e63946}.feu-worked-grid span{color:#e63946;font:700 9px Inter,sans-serif;text-transform:uppercase}.feu-worked-grid h3{margin:6px 0;font-size:12px}.feu-worked-grid code{display:block;padding:9px;border-radius:7px;background:#f1f5f9;color:#1d3557;font:600 9px/1.45 monospace}.feu-worked-grid p{font-size:11px}.feu-range-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:17px 0}.feu-range-grid>div{padding:14px 9px;border:1px solid #e2e8f0;border-top:3px solid #22c55e;border-radius:9px;background:#fff;text-align:center}.feu-range-grid>div:nth-child(2){border-top-color:#f59e0b}.feu-range-grid>div:nth-child(3){border-top-color:#ef4444}.feu-range-grid span,.feu-range-grid strong{display:block}.feu-range-grid span{color:#64748b;font:700 8px Inter,sans-serif;text-transform:uppercase}.feu-range-grid strong{margin:5px 0;color:#1d3557;font:800 17px Lexend,sans-serif}.feu-range-grid p{margin:0;font-size:9px}.feu-check{padding:0;list-style:none}.feu-check li{position:relative;margin-bottom:8px;padding:11px 12px 11px 36px;border-radius:8px;background:#f8fafc;font-size:12px}.feu-check li:before{content:'✓';position:absolute;left:12px;color:#16a34a;font-weight:800}.feu-lab-grid,.feu-compare{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}.feu-lab-grid>div,.feu-compare>div{padding:18px;border:1px solid #dbe3ed;border-radius:11px;background:#fff}.feu-lab-grid span,.feu-compare span{display:block;color:#e63946;font:700 9px Inter,sans-serif;text-transform:uppercase}.feu-lab-grid h3,.feu-compare h3{margin:5px 0;font-size:13px}.feu-lab-grid p,.feu-compare p{font-size:11px}.feu-alert{margin:15px 0;padding:14px 16px;border-left:4px solid #e63946;border-radius:8px;background:#fff1f2;color:#881337;font:12px/1.6 Inter,sans-serif}.feu-faq details{border-bottom:1px solid #e2e8f0}.feu-faq summary{padding:14px 3px;cursor:pointer;color:#1d3557;font:600 13px Lexend,sans-serif}.feu-faq p{margin:0;padding:0 3px 14px;font-size:12px}.feu-sources li{margin-bottom:9px;font-size:12px}.feu-source-note{padding:11px;border-radius:8px;background:#f8fafc;color:#64748b;font-size:10px}.feu-author{margin-top:25px;padding:20px;border:1px solid #dbe3ed;border-radius:13px;background:#fff}.feu-author>div>span{color:#e63946;font:700 9px Inter,sans-serif;text-transform:uppercase;letter-spacing:.06em}.feu-author h2{margin:4px 0 7px;font-size:16px}.feu-author p{margin:0 0 8px;font-size:11px}.feu-author-link{color:#1d4ed8;font:600 10px Lexend,sans-serif;text-decoration:none}.feu-sidebar nav{display:grid}.feu-sidebar .health-item{text-decoration:none}.feu-sidebar .health-icon{font-size:8px;font-weight:800}.feu-source-card p{font-size:11px}
@media(max-width:900px){.feu-layout{grid-template-columns:1fr}.feu-sidebar{position:static}}@media(max-width:760px){.feu-range-grid{grid-template-columns:1fr}}@media(max-width:600px){.feu-card{padding:17px}.feu-sample-grid,.feu-actions,.feu-result-grid,.feu-formula-grid,.feu-key,.feu-worked-grid,.feu-lab-grid,.feu-compare{grid-template-columns:1fr}.feu-main-value strong{font-size:30px}.feu-stats{grid-template-columns:repeat(3,1fr)}.feu-stats .stat-box{padding:9px 3px}}@media(max-width:390px){.feu-unit-switch>span{width:100%;margin-bottom:2px}}@media print{header,footer,#progress-bar,.feu-hero-grid>div:first-child,#feu-form,.feu-print,.feu-content{display:none!important}.feu-hero-grid{display:block!important}.feu-card{box-shadow:none;border:0}.feu-result{border:0}}
.update-badge i{display:inline-block;width:7px;height:7px;border-radius:50%;background:#e63946;margin-right:6px;animation:feu-pulse 2s infinite}
@keyframes feu-pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.4);opacity:.4}}
.text-link, .feu-content p a, .feu-content li a, .feu-content td a, .main-article p a, .main-article li a { color: #e63946 !important; text-decoration: underline !important; text-decoration-color: rgba(230, 57, 70, 0.45) !important; text-underline-offset: 3px !important; text-decoration-thickness: 1.5px !important; font-weight: 600 !important; transition: all 0.2s ease !important; }
.text-link:hover, .feu-content p a:hover, .feu-content li a:hover, .feu-content td a:hover, .main-article p a:hover, .main-article li a:hover { color: #c0303c !important; text-decoration-color: #c0303c !important; }
.feu-case-card{background:#f8fafc;border:1px solid #e2e8f0;border-radius:10px;padding:20px;margin-bottom:20px}
.feu-case-card.case-1{border-left:4px solid #10b981}
.feu-case-card.case-2{border-left:4px solid #ef4444}
.feu-case-title{margin-top:0;margin-bottom:8px;font-size:15px;color:#1d3557;font-family:'Lexend',sans-serif;font-weight:700}
.feu-case-meta{margin:8px 0 12px 18px;font-size:12.5px;line-height:1.65;color:#334155}
.feu-table-wrap{margin:17px 0;overflow-x:auto;border:1px solid #dbe3ed;border-radius:10px}.feu-table-wrap table{width:100%;border-collapse:collapse;background:#fff}.feu-table-wrap th{padding:12px;background:#1d3557;color:#fff;text-align:left;font:700 9px Lexend,sans-serif}.feu-table-wrap td{padding:12px;border-top:1px solid #e2e8f0;color:#475569;font:11px/1.5 Inter,sans-serif}.feu-table-wrap td:first-child{color:#1d3557;font-weight:700}
.takeaways-box{background:#1d3557;color:#fff;border-radius:12px;padding:24px;margin:24px 0}
.takeaways-title{color:#93c5fd;font:700 12px Lexend,sans-serif;text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px}
.takeaways-list{list-style:none;padding:0;margin:0}
.takeaways-list li{display:flex;align-items:flex-start;gap:10px;margin-bottom:12px;font:13px/1.6 Inter,sans-serif;color:#f1f5f9}
.takeaways-list li:last-child{margin-bottom:0}
.takeaways-bullet{display:inline-block;width:8px;height:8px;border-radius:50%;margin-top:7px;flex-shrink:0}
.tb-red{background:#ef4444}
.tb-green{background:#22c55e}
.tb-yellow{background:#eab308}
.tb-blue{background:#38bdf8}
.tb-purple{background:#c084fc}
.author-card{display:flex;gap:16px;align-items:flex-start;padding:20px;border:1px solid #dbe3ed;border-radius:12px;background:#fff;margin-top:28px}
.author-avatar{width:48px;height:48px;border-radius:50%;background:#eff6ff;display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0}
.author-name{font:700 15px Lexend,sans-serif;color:#1d3557;margin-bottom:2px}
.author-name a{color:#1d3557!important;text-decoration:none!important}
.author-name a:hover{color:#e63946!important}
.author-title{font:600 11px Inter,sans-serif;color:#64748b;margin-bottom:8px}
.author-card p{font:12px/1.6 Inter,sans-serif;color:#475569;margin:0}