:root{--blue:#0f4c81;--blue-dark:#082f52;--blue-light:#eaf3fa;--blue-pale:#f4f8fc;--amber:#f4b740;--amber-dark:#835100;--amber-light:#fff8e7;--graphite:#1e1e1e;--slate:#4c5965;--muted:#6d7882;--line:#d9e1e8;--line-strong:#bdcbd6;--white:#fff;--success:#18794e;--success-light:#eaf7f0;--danger:#b42318;--danger-light:#fff0ee;--shadow:0 16px 44px #0f4c8117}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--white);color:var(--graphite);-webkit-font-smoothing:antialiased;margin:0;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.5}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit}.icon{fill:currentColor;flex:none;width:1.2em;height:1.2em}.shell{width:min(1180px,100% - 40px);margin:0 auto}.skip-link{z-index:100;background:var(--amber);color:var(--graphite);border-radius:8px;padding:10px 16px;font-weight:700;position:fixed;top:-60px;left:16px}.skip-link:focus{top:12px}.site-header{background:var(--blue);color:var(--white);border-bottom:1px solid #ffffff2e}.header-inner{align-items:center;gap:42px;min-height:78px;display:flex}.brand{align-items:center;gap:12px;min-width:max-content;text-decoration:none;display:inline-flex}.brand-mark{background:var(--amber);width:40px;height:40px;color:var(--blue-dark);border-radius:10px;place-items:center;font-size:23px;font-weight:900;display:grid;box-shadow:inset 0 0 0 1px #00000014}.brand>span:last-child{flex-direction:column;line-height:1.05;display:flex}.brand strong{letter-spacing:.13em;font-size:20px}.brand small{letter-spacing:.08em;color:#ffffffbd;text-transform:uppercase;margin-top:5px;font-size:10px}nav{align-items:center;gap:30px;margin-left:auto;display:flex}nav a{color:#ffffffd9;font-size:14px;font-weight:700;text-decoration:none}nav a:hover{color:var(--amber)}.header-actions{align-items:center;gap:10px;display:flex;position:relative}.privacy-chip{color:#ffffffe6;border:1px solid #ffffff40;border-radius:999px;align-items:center;gap:7px;padding:8px 12px;font-size:12px;display:inline-flex}.share-button{border:1px solid var(--amber);background:var(--amber);min-height:38px;color:var(--blue-dark);cursor:pointer;border-radius:999px;justify-content:center;align-items:center;gap:7px;padding:0 14px;font-size:12px;font-weight:900;transition:transform .15s,background .15s;display:inline-flex}.share-button:hover{background:#ffc752;transform:translateY(-1px)}.share-status{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.hero{background:var(--blue);color:var(--white);padding:64px 0 70px;position:relative;overflow:hidden}.hero:before{content:"";border:1px solid #ffffff12;border-radius:50%;width:640px;height:640px;position:absolute;top:-320px;right:-230px;box-shadow:0 0 0 70px #ffffff06,0 0 0 140px #ffffff05}.hero-grid{grid-template-columns:minmax(0,1.4fr) minmax(330px,.6fr);align-items:end;gap:72px;display:grid;position:relative}.eyebrow{text-transform:uppercase;letter-spacing:.14em;color:#cce2f3;align-items:center;gap:10px;font-size:12px;font-weight:800;display:flex}.eyebrow span{background:var(--amber);border-radius:99px;width:28px;height:3px}.hero h1{letter-spacing:-.04em;max-width:750px;margin:18px 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(42px,5.7vw,72px);font-weight:700;line-height:.98}.hero-copy{color:#ffffffcf;max-width:710px;margin:0;font-size:18px;line-height:1.65}.hero-badges{flex-wrap:wrap;gap:22px;margin-top:30px;display:flex}.hero-badges span{color:#ffffffe0;align-items:center;gap:7px;font-size:13px;font-weight:700;display:inline-flex}.hero-badges .icon{color:var(--amber)}.share-note{color:#ffffffc7;background:#ffffff0f;border:1px solid #ffffff29;border-radius:10px;align-items:flex-start;gap:10px;max-width:710px;margin-top:24px;padding:13px 15px;display:flex}.share-note .icon{color:var(--amber);margin-top:2px}.share-note p{margin:0;font-size:12px;line-height:1.55}.share-note strong{color:var(--white)}.share-note button{min-width:max-content;min-height:34px;color:var(--white);cursor:pointer;background:0 0;border:1px solid #ffffff4d;border-radius:7px;margin-left:auto;padding:0 12px;font-size:11px;font-weight:900}.share-note button:hover{border-color:var(--amber);color:var(--amber)}.update-card{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#072b4894;border:1px solid #ffffff29;border-radius:16px;align-self:end;gap:16px;padding:24px;display:flex;box-shadow:0 18px 34px #0000001f}.update-icon{background:var(--amber);width:42px;height:42px;color:var(--blue-dark);border-radius:10px;place-items:center;font-size:20px;display:grid}.update-card>div:last-child{flex-direction:column;min-width:0;display:flex}.update-label{color:#bcd8ed;text-transform:uppercase;letter-spacing:.1em;font-size:10px;font-weight:800}.update-card strong{margin-top:4px;font-size:17px}.update-card p{color:#ffffffb3;margin:6px 0 10px;font-size:12px;line-height:1.5}.update-card a{color:var(--amber);align-items:center;gap:5px;font-size:12px;font-weight:800;text-decoration:none;display:inline-flex}.calculator-section{background:linear-gradient(#f8fafc 0,#fff 26%);padding:66px 0 76px}.calculator-grid{grid-template-columns:minmax(0,1.13fr) minmax(390px,.87fr);align-items:start;gap:34px;display:grid}.form-card,.result-card,.empty-result{background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px}.form-card{padding:34px}.section-heading{align-items:flex-start;gap:14px;margin-bottom:28px;display:flex}.step{background:var(--blue);width:36px;height:36px;color:var(--white);letter-spacing:.05em;border-radius:9px;flex:none;place-items:center;font-size:12px;font-weight:900;display:grid}.section-heading h2{color:var(--blue-dark);letter-spacing:-.02em;margin:0;font-family:Georgia,Times New Roman,serif;font-size:28px;line-height:1.1}.section-heading p{color:var(--muted);margin:7px 0 0;font-size:13px}.field{min-width:0}.field label{color:#303c46;margin-bottom:7px;font-size:12px;font-weight:800;display:block}.field label span{color:var(--danger)}.field>small{color:var(--muted);overflow-wrap:anywhere;margin-top:6px;font-size:11px;line-height:1.4;display:block}.field input,.field select,.field textarea{border:1px solid var(--line-strong);background:var(--white);width:100%;color:var(--graphite);border-radius:9px;outline:none;transition:border-color .16s,box-shadow .16s}.field input,.field select{height:46px;padding:0 13px}.field textarea{resize:vertical;min-height:96px;padding:11px 13px}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #0f4c8124}.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--blue) 50%),linear-gradient(135deg,var(--blue) 50%,transparent 50%);background-position:calc(100% - 17px) 20px,calc(100% - 12px) 20px;background-repeat:no-repeat;background-size:5px 5px;padding-right:36px}.combobox-wrap{z-index:8;position:relative}.search-control{position:relative}.search-control input{padding-left:42px;font-weight:700}.search-symbol{color:var(--blue);font-size:23px;line-height:1;position:absolute;top:50%;left:14px;transform:translateY(-52%)rotate(-20deg)}.options-list{z-index:20;border:1px solid var(--line-strong);background:var(--white);border-radius:11px;max-height:320px;margin:0;padding:6px;list-style:none;position:absolute;top:72px;left:0;right:0;overflow-y:auto;box-shadow:0 18px 45px #082f522e}.options-list li{cursor:pointer;border-radius:7px;padding:10px 11px}.options-list li.active,.options-list li:hover{background:var(--blue-light)}.options-list strong,.options-list span{display:block}.options-list strong{color:var(--blue-dark);font-size:13px}.options-list span{color:var(--muted);margin-top:3px;font-size:11px}.options-list .empty-option{color:var(--muted);cursor:default}.selected-summary{border-left:4px solid var(--blue);background:var(--blue-pale);border-radius:8px;grid-template-columns:1.1fr 1fr;gap:18px;margin:18px 0 24px;padding:16px 18px;display:grid}.selected-summary>div span,.selected-summary dt{color:var(--muted);text-transform:uppercase;letter-spacing:.09em;font-size:9px;font-weight:800;display:block}.selected-summary>div strong{color:var(--blue-dark);margin-top:4px;font-size:13px;line-height:1.35;display:block}.selected-summary dl{grid-template-columns:repeat(3,1fr);gap:10px;margin:0;display:grid}.selected-summary dd{color:var(--graphite);overflow-wrap:anywhere;margin:3px 0 0;font-size:11px;font-weight:700}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 18px;display:grid}.unit-input{position:relative}.unit-input input{padding-right:78px}.unit-input span{color:var(--muted);font-size:11px;font-weight:800;position:absolute;top:50%;right:13px;transform:translateY(-50%)}.unit-input.readonly input{color:var(--blue-dark);background:#f4f6f8;font-weight:800}.unit-input.has-error input{border-color:var(--danger);box-shadow:0 0 0 2px #b4231814}.field>.error-text{color:var(--danger);font-weight:700}.manual-panel{border:1px solid var(--line);border-radius:10px;margin-top:24px;overflow:hidden}.toggle-row{cursor:pointer;background:#fbfcfd;align-items:center;gap:11px;padding:14px 16px;display:flex}.toggle-row>input{opacity:0;pointer-events:none;position:absolute}.toggle{background:#9aa6af;border-radius:99px;flex:none;width:38px;height:22px;transition:background .2s;position:relative}.toggle:after{content:"";background:#fff;border-radius:50%;width:16px;height:16px;transition:transform .2s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #0000003d}.toggle-row input:checked+.toggle{background:var(--blue)}.toggle-row input:checked+.toggle:after{transform:translate(16px)}.toggle-row input:focus-visible+.toggle{outline-offset:2px;outline:3px solid #0f4c8138}.toggle-row>span:last-child{flex-direction:column;display:flex}.toggle-row strong{font-size:12px}.toggle-row small{color:var(--muted);font-size:10px}.manual-fields{border-top:1px solid var(--line);background:var(--white);grid-template-columns:.7fr 1.3fr;gap:16px;padding:16px;display:grid}.inline-alert{border-radius:8px;align-items:flex-start;gap:9px;margin-top:18px;padding:12px 14px;font-size:12px;line-height:1.5;display:flex}.inline-alert.error{color:#7a1b14;background:var(--danger-light);border:1px solid #f3c6c1}.primary-button{background:var(--amber);color:#2d2108;cursor:pointer;border:0;border-radius:9px;justify-content:center;align-items:center;gap:9px;width:100%;min-height:49px;margin-top:22px;font-weight:900;transition:transform .15s,background .15s;display:inline-flex;box-shadow:0 6px 15px #f4b7403d}.primary-button:hover:not(:disabled){background:#ffc752;transform:translateY(-1px)}.primary-button:disabled{opacity:.48;cursor:not-allowed;box-shadow:none}.privacy-note{color:var(--muted);justify-content:center;align-items:center;gap:6px;margin:11px 0 0;font-size:10px;display:flex}.results-column{min-width:0;scroll-margin-top:20px}.results-heading{margin:4px 4px 22px}.result-card{border-color:#afc7d9;overflow:hidden}.result-topline{background:var(--blue);color:var(--white);justify-content:space-between;align-items:center;gap:12px;padding:18px 22px;display:flex}.result-topline>span:first-child{text-transform:uppercase;letter-spacing:.09em;font-size:10px;font-weight:900}.status-dot{color:#c8f3dc;padding-left:14px;font-size:10px;font-weight:800;position:relative}.status-dot:before{content:"";background:#5fe0a0;border-radius:50%;width:7px;height:7px;position:absolute;top:50%;left:0;transform:translateY(-50%);box-shadow:0 0 0 4px #5fe0a01f}.main-result{grid-template-columns:auto 1fr;align-items:baseline;column-gap:10px;padding:24px 22px 12px;display:grid}.main-result strong{color:var(--blue-dark);letter-spacing:-.04em;font-family:Georgia,Times New Roman,serif;font-size:clamp(42px,5vw,60px);line-height:1}.main-result>span{color:var(--blue);font-size:18px;font-weight:900}.main-result small{color:var(--muted);grid-column:1/-1;margin-top:7px;font-size:12px}.calculation-line{color:var(--muted);align-items:center;gap:9px;padding:0 22px 21px;font-size:11px;display:flex}.calculation-line span:nth-child(2){color:var(--blue);font-size:16px;font-weight:900}.fraction-grid{grid-template-columns:1fr 1fr;gap:12px;padding:0 22px;display:grid}.fraction-card{border-radius:10px;padding:16px}.fraction-card>span{text-transform:uppercase;letter-spacing:.08em;font-size:10px;font-weight:900;display:block}.fraction-card strong{margin-top:5px;font-size:23px;display:block}.fraction-card strong small{font-size:11px}.fraction-card p{margin:3px 0 0;font-size:10px}.fraction-card.control{color:#664300;background:var(--amber-light);border:1px solid #f0d58f}.fraction-card.threshold{color:var(--blue-dark);background:var(--blue-light);border:1px solid #c7ddec}.interpretation{color:#0e5f3b;background:var(--success-light);border-radius:8px;gap:9px;margin:18px 22px 0;padding:12px 13px;display:flex}.interpretation p{margin:0;font-size:11px;line-height:1.5}.ltl-card{color:#5b410d;background:#fffaf0;border:1px solid #ebcf8c;border-radius:9px;margin:14px 22px 0;padding:15px}.ltl-title{align-items:center;gap:8px;display:flex}.ltl-title strong{font-size:12px}.ltl-title span{background:#f8e5ae;border-radius:99px;margin-left:auto;padding:3px 7px;font-size:10px;font-weight:900}.ltl-values{grid-template-columns:1fr 1fr;gap:14px;margin:12px 0;display:grid}.ltl-values span,.ltl-values strong{display:block}.ltl-values span{color:#806c3b;text-transform:uppercase;font-size:9px;font-weight:800}.ltl-values strong{margin-top:2px;font-size:14px}.ltl-card>p{margin:0;font-size:10px;line-height:1.5}.export-area{border-top:1px solid var(--line);background:#fbfcfd;justify-content:space-between;align-items:center;gap:12px;margin-top:20px;padding:17px 22px;display:flex}.export-area>span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:10px;font-weight:900}.export-area>div{gap:8px;display:flex}.export-area button{border:1px solid var(--line-strong);background:var(--white);min-height:37px;color:var(--blue);cursor:pointer;border-radius:7px;align-items:center;gap:6px;padding:0 12px;font-size:11px;font-weight:900;display:inline-flex}.export-area button:hover{border-color:var(--blue);background:var(--blue-pale)}.empty-result{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:410px;padding:44px;display:flex}.empty-icon{background:var(--blue-light);width:64px;height:64px;color:var(--blue);border-radius:50%;place-items:center;font-size:28px;display:grid}.empty-result h3{color:var(--blue-dark);margin:18px 0 7px}.empty-result p{max-width:360px;color:var(--muted);margin:0;font-size:13px}.regulatory-note{color:#6d5316;background:#fffaf0;border:1px solid #ead79f;border-radius:9px;align-items:flex-start;gap:10px;margin-top:15px;padding:14px 16px;display:flex}.regulatory-note p{margin:0;font-size:10px;line-height:1.55}.method-section{background:var(--blue-dark);color:var(--white);padding:72px 0}.section-kicker{color:var(--amber);letter-spacing:.16em;font-size:10px;font-weight:900}.method-grid{grid-template-columns:.8fr 1.2fr;align-items:start;gap:90px;margin-top:16px;display:grid}.method-grid h2,.sources-heading h2{letter-spacing:-.03em;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(32px,4vw,46px);line-height:1.05}.method-grid>div>p{color:#ffffffad;max-width:420px;line-height:1.7}.method-steps{grid-template-columns:1fr 1fr;gap:24px 28px;margin:0;padding:0;list-style:none;display:grid}.method-steps li{gap:12px;display:flex}.method-steps li>span{width:28px;height:28px;color:var(--amber);border:1px solid #ffffff38;border-radius:50%;flex:none;place-items:center;font-size:11px;font-weight:900;display:grid}.method-steps strong{font-size:13px}.method-steps p{color:#ffffff9e;margin:5px 0 0;font-size:11px;line-height:1.5}.formula-band{background:#ffffff0d;border:1px solid #ffffff26;border-radius:11px;justify-content:center;align-items:center;gap:24px;margin-top:48px;padding:22px 30px;display:flex}.formula-band>span:first-child{color:#a9c9df;text-transform:uppercase;letter-spacing:.1em;font-size:11px;font-weight:800}.formula-band>strong{font-family:Georgia,Times New Roman,serif;font-size:23px}.fraction{text-align:center;flex-direction:column;min-width:150px;display:flex}.fraction b{font-size:12px}.fraction i{background:#ffffffa6;height:1px;margin:5px 0}.formula-band .equals{color:var(--amber);font-weight:900}.sources-section{background:#f7f9fb;padding:72px 0 76px}.sources-heading{grid-template-columns:1fr 1fr;align-items:end;gap:70px;display:grid}.sources-heading .section-kicker{color:var(--blue);margin-bottom:12px;display:block}.sources-heading h2{color:var(--blue-dark)}.sources-heading>p{color:var(--slate);margin:0;font-size:13px;line-height:1.7}.source-grid{grid-template-columns:repeat(4,1fr);gap:14px;margin-top:32px;display:grid}.source-grid a{border:1px solid var(--line);background:var(--white);border-radius:11px;flex-direction:column;min-height:140px;padding:19px;text-decoration:none;transition:transform .15s,border-color .15s,box-shadow .15s;display:flex;position:relative}.source-grid a:hover{border-color:#9ebbd0;transform:translateY(-2px);box-shadow:0 10px 22px #0f4c8114}.source-grid a>span{color:var(--blue);letter-spacing:.12em;font-size:10px;font-weight:900}.source-grid a strong{color:var(--blue-dark);margin-top:8px;font-size:15px}.source-grid a small{color:var(--muted);margin-top:4px;font-size:10px}.source-grid a .icon{color:var(--blue);position:absolute;bottom:16px;right:16px}.data-provenance{border:1px solid var(--line);background:var(--white);color:var(--slate);border-radius:9px;align-items:center;gap:12px;margin-top:18px;padding:14px 17px;display:flex}.data-provenance .icon{color:var(--blue);font-size:21px}.data-provenance p{margin:0;font-size:11px}.data-provenance span{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px}footer{color:var(--white);background:#061f35;padding:28px 0}.footer-inner{align-items:center;gap:28px;display:flex}.footer-brand .brand-mark{border-radius:8px;width:32px;height:32px;font-size:18px}.footer-brand strong{font-size:16px}.footer-brand small{font-size:8px}.footer-inner p{color:#ffffff8f;text-align:center;max-width:620px;margin:0 auto;font-size:10px}.footer-inner>span:last-child{color:#ffffff8c;white-space:nowrap;font-size:10px}:focus-visible{outline:3px solid var(--amber);outline-offset:3px}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}@media (width<=980px){nav{display:none}.header-actions{margin-left:auto}.hero-grid{grid-template-columns:1fr;gap:38px}.update-card{max-width:520px}.calculator-grid{grid-template-columns:1fr}.results-column{max-width:none}.method-grid{gap:48px}.source-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=680px){.shell{width:min(100% - 28px,1180px)}.header-inner{min-height:68px}.privacy-chip{justify-content:center;width:38px;height:38px;padding:0;font-size:0}.privacy-chip .icon{font-size:16px}.share-button{width:42px;padding:0}.share-button span{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.hero{padding:46px 0 50px}.hero h1{font-size:44px}.hero-copy{font-size:16px}.hero-badges{gap:12px 18px}.share-note{flex-wrap:wrap}.share-note p{width:calc(100% - 30px)}.share-note button{width:100%;margin-left:0}.calculator-section{padding:42px 0 52px}.form-card{padding:24px 18px}.section-heading h2{font-size:24px}.selected-summary,.form-grid,.manual-fields,.method-grid,.method-steps,.sources-heading{grid-template-columns:1fr}.selected-summary dl{grid-template-columns:repeat(3,1fr)}.results-heading{margin-top:10px}.fraction-grid{grid-template-columns:1fr}.main-result strong{font-size:48px}.export-area{flex-direction:column;align-items:flex-start}.export-area>div{width:100%}.export-area button{flex:1;justify-content:center}.method-section,.sources-section{padding:54px 0}.method-grid{gap:24px}.formula-band{flex-wrap:wrap;gap:14px;padding:18px}.formula-band>span:first-child{text-align:center;width:100%}.source-grid{grid-template-columns:1fr}.footer-inner{text-align:center;flex-direction:column}}@media (width<=420px){.brand small{display:none}.hero h1{font-size:38px}.hero-badges{flex-direction:column}.update-card{padding:18px}.selected-summary dl{grid-template-columns:1fr 1fr}.ltl-values{grid-template-columns:1fr}}
