:root{--primary-color:#7912b4;--secondary-color:#2ecc71;--background-color:#080808;--text-color:#e2eaf1;--nav-foot-bg-color:#111;--nav-foot-text-color:#e2eaf1;--box-shadow-color:rgba(243,139,3,.8)}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);border:0}*{box-sizing:border-box;margin:0;padding:0}body{font-family:sans-serif;background-color:var(--background-color);color:var(--text-color);max-width:100%}a{text-decoration:none;color:var(--text-color);font-size:1rem;font-weight:700;text-transform:capitalize}.header{position:fixed;width:100%;background-color:var(--nav-foot-bg-color);z-index:1000}.nav{display:flex;justify-content:space-between;align-items:center}.logo{font-size:1rem;color:var(--primary-color);padding-left:20px}.logo img{max-width:100%;max-height:60px;width:auto;height:auto;display:block;border-radius:10px;object-fit:contain}.hamburger{display:flex;flex-direction:column;justify-content:space-between;width:50px;height:24px;padding-right:20px;cursor:pointer;z-index:1001}.hamburger .line{height:4px;background-color:var(--text-color);border-radius:2px;transition:all .3s ease-in-out}.hamburger.active .line:nth-child(1){transform:translateY(10px) rotate(45deg)}.hamburger.active .line:nth-child(2){opacity:0}.hamburger.active .line:nth-child(3){transform:translateY(-10px) rotate(-45deg)}.nav__link{position:fixed;top:5rem;left:50%;transform:translateX(-50%);width:100%;background-color:var(--background-color);z-index:1000;padding:10px 15px}.nav__link a{display:block;text-align:center;padding:10px 0}.nav__link a:hover{background-color:var(--box-shadow-color);border-radius:10px;margin:0 5px}.hide{display:none}@media screen and (max-width:599px){.about-image{display:none}.heading-h1{margin-top:2rem}main #example #rates{margin:0}}@media screen and (min-width:600px){.nav{background-color:var(--nav-foot-bg-color);display:flex;align-items:center;padding:10px 30px}.nav__link{display:flex;align-items:center;position:static;width:auto;margin-right:20px;background:none;transform:none;left:auto;top:auto;gap:5px}.nav__link a{display:inline-block;padding:12px 20px;transition:padding .2s ease}.nav__link a:hover{background-color:var(--box-shadow-color);border-radius:10px;margin:0}.hamburger{display:none}main #example{margin-top:1rem}.text{margin-top:1.5rem}}main{max-width:var(--max);margin:0 auto;padding:2rem 1rem}article{background:var(--card);border:1px solid var(--ring);border-radius:16px;padding:1.5rem}h1,h2,h3{font-family:Lora,serif;line-height:1.25}h1{font-size:2rem;color:var(--primary);margin:.3rem 0 1rem}h2{font-size:1.5rem;margin:2rem 0 .75rem}h3{font-size:1.2rem;margin:1.5rem 0 .5rem}.lede{line-height:1.3;margin:.8rem 0;text-align:justify}.hero{display:flex;flex-direction:column;gap:1rem}.hero .cta{display:flex;flex-wrap:wrap;gap:.75rem;padding:1rem 0}.btn{display:inline-block;padding:.75rem 1rem;border-radius:10px;font-weight:700;border:1px solid transparent}.btn-primary{background:var(--secondary-color)}.btn-primary:hover{box-shadow:0 2px 10px var(--box-shadow-color)}.btn-outline{border-color:var(--text-color)}.btn-outline:hover{box-shadow:0 2px 10px var(--box-shadow-color)}.meta{display:flex;gap:1rem;color:#6c6b6b;font-size:.9rem;padding:.5rem 0}.note{border:1px solid #dbeafe;color:var(--secondary-color);padding:1rem;border-radius:12px;margin:.5rem 0}.grid{display:grid;grid-template-columns:1fr;gap:1rem}.formula{background:#0f172a;color:#e2e8f0;border-radius:12px;padding:1rem;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Courier New,monospace;overflow:auto}.kpi{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}.kpi .pill{background:#f1f5f9;border:1px solid var(--text-color);border-radius:10px;padding:.75rem;text-align:center;color:var(--background-color)}.breadcrumbs{font-size:.9rem;color:var(--muted);margin-bottom:1rem}.img-wrap{border-radius:12px;overflow:hidden;border:1px solid var(--ring)}.img-wrap img{display:block;width:100%;height:auto}.text h1{color:var(--secondary-color)}.concept p{line-height:1.3}@media (min-width:768px){.hero{flex-direction:row;align-items:flex-start;gap:2rem;padding-top:3rem;padding-bottom:1.5rem}.hero .text{flex:1;padding:0}.hero .text h1{margin:0}.hero .visual{flex:1;padding:0 .5rem}.grid-2{grid-template-columns:1fr 1fr}main #example{margin-top:1rem;padding:1rem}}.worked-example{background:#f9fafb;border:1px solid #e5e7eb;border-radius:12px;padding:1.5rem;margin:2rem 0;font-family:Roboto,sans-serif;color:#333}.worked-example h3{font-size:1.3rem;margin-bottom:1rem;color:#1f2937;font-weight:700}.worked-example ul{list-style:none;padding:0;margin:0 0 1.5rem}.worked-example ul li{position:relative;padding-left:1.5rem;margin-bottom:.5rem;line-height:1.6;font-size:1rem}.worked-example ul li:before{content:"✔";position:absolute;left:0;color:#16a34a;font-weight:700}.worked-example .steps{margin-top:1.2rem;border-top:1px dashed #d1d5db;padding-top:1rem}.worked-example .steps li:before{content:"→";color:#0077cc}.footer{background-color:#111;color:var(--text-color);padding:40px 20px;text-align:center}.footer__content{max-width:1200px;margin:0 auto}.footer__logo{font-size:1.5rem;font-weight:700;display:flex;justify-content:center;margin-bottom:20px;align-items:center}.footer_img_logo{max-width:100%;height:auto;display:block;object-fit:contain}.footer__links{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}.footer__links a{color:var(--text-color);text-decoration:none;font-weight:600;transition:color .3s ease}.footer__links a:hover{color:var(--box-shadow-color)}.footer__copy{font-size:.875rem;color:#888;text-align:center;line-height:1.6;margin-top:1.5rem;opacity:.6}.footer__disclaimer{margin:.8rem 0;font-size:.875rem;color:#888;text-align:center}.footer_privacy_policy{display:flex;gap:3px;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:1rem}.footer_privacy_policy a{color:var(--text-color);text-decoration:none;padding:0 10px;position:relative;font-weight:400;text-transform:none;font-size:.8rem}.footer_privacy_policy a:not(:last-child):after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);height:16px;border-right:1px solid #aaa}@media screen and (min-width:600px){.footer__socials{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.footer__links{flex-direction:row;justify-content:center;gap:30px}}.footer__social-follow{margin-bottom:20px;display:flex;align-items:center;gap:8px;font-weight:600;font-size:1rem;justify-content:center}.footer__social-link{color:#21a4eb;display:inline-flex;align-items:center;transition:color .3s ease}.footer__social-link:hover,.footer__social-link:focus{color:#c0ddec;outline:none}.footer__social-link svg{vertical-align:middle;fill:currentColor;width:24px;height:24px}@media (max-width:480px){.footer__social-follow{align-items:center;gap:4px;font-size:.9rem}.footer__social-link svg{width:20px;height:20px}}#difference{padding:5px 20px;border-radius:10px;color:var(--text-color);font-family:Inter,Segoe UI,sans-serif}#difference h2{font-size:clamp(1.4rem,2vw,2rem);font-weight:700;margin-bottom:10px}#difference p{font-size:clamp(.95rem,1.3vw,1.1rem);line-height:1.6;margin-top:10px}.comparison-table{width:100%;border-collapse:collapse;margin-top:20px;background:#fafafa;border-radius:10px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.05)}.comparison-table thead{background:#1e88e5;color:#fff}.comparison-table th,.comparison-table td{padding:14px 16px;text-align:left;font-size:clamp(.9rem,1.2vw,1rem);border-bottom:1px solid #e0e0e0}.comparison-table tbody tr:nth-child(even){background:#f3f7ff}.comparison-table tbody tr:hover{background:#e9f2ff;transition:.2s ease-in-out}@media (max-width:768px){.comparison-table{display:block;overflow-x:auto;white-space:nowrap}#difference h2,#difference p{text-align:center}}@media (max-width:500px){#difference{padding:15px}.comparison-table th,.comparison-table td{padding:10px 12px;font-size:.9rem}main #example{margin:0}main #rates{margin:1.5rem 0!important}}@media (min-width:1024px){#difference{padding:30px 40px}.comparison-table th,.comparison-table td{padding:16px 20px;font-size:1rem}}#example,#example+section{margin-top:18px;margin:0 2.5rem;padding:.2rem;background:#fff;border-radius:12px;font-family:Inter,Segoe UI,sans-serif;color:#333;box-shadow:0 2px 8px rgba(0,0,0,.04)}#example h2,#example+section h2{font-size:clamp(1.4rem,2vw,2rem);font-weight:700;margin-bottom:10px}#example h3{font-size:clamp(1.2rem,1.8vw,1.5rem);margin-top:20px;margin-bottom:10px}#example p,#example+section p{font-size:clamp(.95rem,1.3vw,1.1rem);line-height:1.6;margin-top:10px}#example ol{margin-left:1.2rem;margin-top:10px;font-size:clamp(.95rem,1.3vw,1.05rem);line-height:1.65}.small{font-size:.9rem;opacity:.75}.data-table,#example+section table{width:100%;border-collapse:collapse;margin-top:20px;background:#fafafa;border-radius:10px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.05)}.data-table th,.data-table td,#example+section table th,#example+section table td{padding:14px 16px;font-size:clamp(.9rem,1.2vw,1rem);text-align:left;border-bottom:1px solid #e0e0e0}.data-table thead,#example+section table thead{background:#1e88e5;color:#fff}.data-table tbody tr:nth-child(even),#example+section table tbody tr:nth-child(even){background:#f3f7ff}.data-table tbody tr:hover,#example+section table tbody tr:hover{background:#e9f2ff;transition:.2s ease-in-out}@media (max-width:768px){.data-table,#example+section table{display:block;overflow-x:auto;white-space:nowrap}#example h2,#example+section h2,#example p,#example+section p{text-align:center}}@media (max-width:500px){#example,#example+section{padding:15px}.data-table th,.data-table td,#example+section table th,#example+section table td{padding:10px 12px;font-size:.9rem}#example h3{font-size:1.1rem}}@media (min-width:1024px){#example,#example+section{padding:30px 40px}.data-table th,.data-table td,#example+section table th,#example+section table td{padding:16px 20px}}#mistakes,[aria-label="Best practices"],[aria-label="FAQ"]{padding:.5rem 20px;border-radius:12px;font-family:Inter,Segoe UI,sans-serif;color:var(--text-color);box-shadow:0 2px 8px rgba(0,0,0,.05)}#mistakes h2,[aria-label="Best practices"] h2,[aria-label="FAQ"] h2{font-size:clamp(1.4rem,2vw,2rem);font-weight:700;margin-bottom:12px}#mistakes p,[aria-label="Best practices"] p,[aria-label="FAQ"] p{font-size:clamp(.95rem,1.3vw,1.1rem);line-height:1.65;margin-top:10px}#mistakes ul,[aria-label="Best practices"] ul{margin-top:10px;padding-left:1.2rem;font-size:clamp(.95rem,1.3vw,1.05rem);line-height:1.65;display:flex;flex-direction:column;gap:8px}#mistakes li,[aria-label="Best practices"] li{position:relative;padding-left:4px}#mistakes li::marker,[aria-label="Best practices"] li::marker{color:#3949ab}#who,[aria-label="Who should use corrected CUF?"]{padding:.5rem 20px;border-radius:12px;font-family:Inter,Segoe UI,sans-serif;color:var(--text-color);box-shadow:0 2px 8px rgba(0,0,0,.05)}#who h2,[aria-label="Who should use corrected CUF?"] h2,[aria-label="Who should use corrected CUF?"] h2{font-size:clamp(1.4rem,2vw,2rem);font-weight:700;margin-bottom:12px}#who ul,[aria-label="Who should use corrected CUF?"] ul{margin-top:10px;padding-left:1.2rem;font-size:clamp(.95rem,1.3vw,1.05rem);line-height:1.65;display:flex;flex-direction:column;gap:8px}#who li,[aria-label="Who should use corrected CUF?"] li{position:relative;padding-left:4px}#who li::marker,[aria-label="Who should use corrected CUF?"] li::marker{color:#3949ab}#limitations,[aria-label="Limitations of corrected CUF"]{padding:.5rem 20px;border-radius:12px;font-family:Inter,Segoe UI,sans-serif;color:var(--text-color);box-shadow:0 2px 8px rgba(0,0,0,.05)}#limitations h2,[aria-label="Limitations of corrected CUF"] h2,[aria-label="Limitations of corrected CUF"] h2{font-size:clamp(1.4rem,2vw,2rem);font-weight:700;margin-bottom:12px}#limitations ul,[aria-label="Limitations of corrected CUF"] ul{margin-top:10px;padding-left:1.2rem;font-size:clamp(.95rem,1.3vw,1.05rem);line-height:1.65;display:flex;flex-direction:column;gap:8px}#limitations li,[aria-label="Limitations of corrected CUF"] li{position:relative;padding-left:4px}#limitations li::marker,[aria-label="Limitations of corrected CUF"] li::marker{color:#3949ab}.faq-item{background:#f7f9ff;border:1px solid #e2e6f3;padding:16px 18px;border-radius:10px;margin-top:14px;box-shadow:0 1px 4px rgba(0,0,0,.04);transition:background .2s ease;color:var(--background-color)}.faq-item:hover{background:#eef3ff}.faq-item h3{font-size:clamp(1.1rem,1.7vw,1.3rem);margin-bottom:6px;color:#2d3a7c}.faq-item p{margin-top:6px;font-size:clamp(.95rem,1.2vw,1.05rem);line-height:1.65}.note{margin-top:1rem;font-size:.95rem}.note a{color:#1e88e5;font-weight:600;text-decoration:none}.note a:hover{text-decoration:underline}@media (max-width:768px){#who h2{margin-top:0}#limitations h2{margin-top:0}#mistakes h2,[aria-label="Best practices"] h2,[aria-label="FAQ"] h2{text-align:center}#mistakes ul,[aria-label="Best practices"] ul{padding-left:1rem}.faq-item{padding:14px 16px}}@media (max-width:500px){#mistakes,[aria-label="Best practices"],[aria-label="FAQ"]{padding:15px}.faq-item h3{font-size:1rem}.faq-item p{font-size:.9rem}}@media (min-width:1024px){#mistakes,[aria-label="Best practices"],[aria-label="FAQ"]{padding:10px 30px}.faq-item{padding:18px 22px}}[aria-label="Explore more"]{margin-top:18px;padding:20px;background:#fff;border-radius:12px;font-family:Inter,Segoe UI,sans-serif;color:#333;box-shadow:0 2px 8px rgba(0,0,0,.05)}[aria-label="Explore more"] h2{font-size:clamp(1.4rem,2vw,2rem);font-weight:700;margin-bottom:12px}[aria-label="Explore more"] ul{list-style:none;padding:0;margin-top:10px;display:flex;flex-direction:column;gap:12px}[aria-label="Explore more"] a{display:block;width:100%;padding:14px 18px;background:#f7f9ff;border:1px solid #e0e6f5;border-radius:10px;text-decoration:none;font-size:clamp(.95rem,1.2vw,1.1rem);font-weight:500;color:#1e3a8a;transition:all .2s ease}[aria-label="Explore more"] a:hover{background:#e9efff;border-color:#c4d2ff;transform:translateY(-2px);box-shadow:0 2px 6px rgba(0,0,0,.07)}@media (max-width:768px){[aria-label="Explore more"] h2{text-align:center}[aria-label="Explore more"] ul{gap:10px}}@media (max-width:500px){[aria-label="Explore more"]{padding:15px}[aria-label="Explore more"] a{padding:12px 14px;font-size:.95rem}}@media (min-width:1024px){[aria-label="Explore more"]{padding:30px 40px}[aria-label="Explore more"] a{padding:16px 20px}}.heading-h1{color:var(--text-color);text-align:center;font-size:clamp(1.8rem,5vw,3rem);margin:0 auto;padding:0 16px;line-height:1.3;margin-top:3rem}@media screen and (min-width:200px){.heading-h1{margin-top:5rem}main #example{margin-top:1.5rem}}@media screen and (min-width:600px){.heading-h1{font-size:2.5rem}}@media screen and (min-width:1024px){.heading-h1{font-size:3rem}}@media (max-width:767px){.hero{padding-top:0!important;margin-top:0!important}.hero .visual{margin-top:0!important;padding-top:0!important}.hero .visual img{margin-top:0!important;padding-top:0!important;display:block}}main #rates{margin-top:2rem;padding:1rem}.example h2{text-align:center}.author-bio{--bio-bg:#fff;--bio-border:#e2e8f0;--bio-text:#1e293b;--bio-muted:#64748b;--bio-accent:#0ea5e9;--bio-shadow:0 10px 25px -5px rgba(0,0,0,.08),0 4px 6px -2px rgba(0,0,0,.05);max-width:860px;margin:4rem auto;padding:2rem;background:var(--bio-bg);border-radius:1rem;border:1px solid var(--bio-border);box-shadow:var(--bio-shadow);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;color:var(--bio-text);line-height:1.7}@media (prefers-color-scheme:dark){.author-bio{--bio-bg:#0f172a;--bio-border:#1e293b;--bio-text:#e2e8f0;--bio-muted:#94a3b8;--bio-shadow:0 10px 25px -5px rgba(0,0,0,.4)}}.author-bio h3{margin:0 0 1.25rem;font-size:clamp(1.25rem,2.5vw,1.5rem);font-weight:700;color:var(--bio-text);position:relative;padding-bottom:.5rem}.author-bio h3::after{content:"";position:absolute;left:0;bottom:0;width:60px;height:4px;background:var(--bio-accent);border-radius:2px}.author-bio address{font-style:normal}.author-bio p{margin:0 0 1rem;font-size:clamp(.95rem,2vw,1.05rem);color:var(--bio-text)}.author-bio p:last-child{margin-bottom:0}.author-bio strong{color:var(--bio-accent);font-weight:700}.author-bio a{color:var(--bio-accent)}.author-bio a:hover,.author-bio a:focus{transform:translateY(-2px);color:cadetblue}@media (max-width:640px){.author-bio{margin:2.5rem 1rem;padding:1.5rem;border-radius:.75rem}.author-bio a{width:100%;text-align:center}}.source-note{font-size:.875rem;color:#475569;margin-top:1.5rem;padding:1rem;background:#f8fafc;border-left:4px solid #0ea5e9;border-radius:0 .5rem .5rem 0}.source-note a{color:var(--bio-text);font-weight:600;text-decoration:none}@media (prefers-color-scheme:dark){.source-note{background:#3b4047;color:#cbd5e1}}.cuf-section{background:var(--bg-dark);color:var(--text-main);line-height:1.65;font-family:"Roboto",sans-serif}.cuf-section h2{font-size:2rem;margin-bottom:1.2rem;font-weight:700;color:#fff;letter-spacing:.3px}.cuf-section h3{color:var(--accent);font-weight:600;margin-top:1rem;margin-bottom:.5rem;font-size:1.25rem}.cuf-section p{margin-bottom:1.1rem;font-size:1.05rem;color:var(--text-main)}.cuf-box{background:var(--bg-card);padding:1.1rem 0;border-left:3px solid var(--accent);border-radius:6px;margin:.5rem 0;color:var(--text-main)}.cuf-section ul{padding-left:1.5rem;margin:1.2rem 0}.cuf-section li{margin-bottom:.65rem;color:var(--text-main)}.cuf-highlight{color:var(--accent-light);font-weight:600}.cuf-section a{color:var(--accent-light);text-decoration:none}.cuf-section a:hover{color:var(--accent);text-decoration:underline}@media (max-width:600px){.cuf-section{padding:2rem 1rem}.cuf-section h2{font-size:1.7rem}.cuf-section h3{font-size:1.15rem}}