:root{--ink:#173d32;--text:#303f37;--muted:#637064;--paper:#f5f3eb;--sand:#eae7db;--line:#d4d9cc;--orange:#b55c32;--white:#fffef9;--serif:Georgia,'Times New Roman',serif;--sans:'Segoe UI',Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.65 var(--sans)}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}h1,h2,h3,p,figure{margin:0}h1,h2,h3{color:var(--ink);font-weight:400}h1{font:clamp(3.2rem,5.25vw,5.3rem)/1.05 var(--serif);letter-spacing:-.055em}h1 em{font-weight:400;color:var(--orange)}h2{font:clamp(2.2rem,3.5vw,3.5rem)/1.13 var(--serif);letter-spacing:-.035em}h3{font:1.6rem/1.25 var(--serif)}p+p{margin-top:16px}a:focus-visible{outline:3px solid var(--orange);outline-offset:6px}a:hover{text-decoration:underline;text-underline-offset:5px}.wrap{width:min(1220px,calc(100% - 96px));margin-inline:auto}.skip{position:absolute;z-index:30;top:-100px;left:24px;background:var(--ink);color:white;padding:10px 16px}.skip:focus{top:10px}.site-header{border-bottom:1px solid var(--line)}.header-inner{min-height:108px;display:flex;align-items:center;justify-content:space-between;gap:32px}.brand{display:flex;gap:13px;align-items:center;color:var(--ink);flex-shrink:0}.brand:hover{text-decoration:none}.brand svg{width:30px;height:36px}.brand>span{font:1.6rem/1 var(--serif);letter-spacing:-.035em}.brand i{font-size:1.2rem}.brand small{display:block;margin-top:9px;font:9px/1 var(--sans);letter-spacing:.26em}.header-inner nav{display:flex;gap:34px;align-items:center}.header-inner nav a{font-size:14px;padding:8px 0;border-bottom:1px solid transparent}.header-inner nav a[aria-current]{border-color:var(--ink);font-weight:600}.eyebrow{font-size:11px;font-weight:600;letter-spacing:.19em;line-height:1.5;color:var(--muted)}.dot{display:inline-block;width:6px;height:6px;background:var(--orange);border-radius:50%;margin-right:8px;vertical-align:middle}.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center;padding-block:56px 64px}.hero-copy .eyebrow{margin-bottom:30px}.lead{font-size:17px;line-height:1.7;color:#59675c;max-width:520px}.hero-copy .lead{max-width:425px;margin:28px 0 30px}.button{background:var(--ink);color:var(--white);display:inline-flex;gap:35px;align-items:center;justify-content:space-between;padding:15px 22px;font-size:13px;font-weight:600;min-height:52px}.button:hover{background:#245442;text-decoration:none}.button span{font-size:20px;font-weight:400}.hero-foot{font-size:9px;letter-spacing:.2em;margin-top:35px;color:var(--muted)}.hero-art{position:relative;background:#e0e4ce;align-self:stretch}.hero-art img{width:100%;height:100%;min-height:490px;object-fit:cover}.hero-art figcaption{position:absolute;inset:auto 22px 18px;display:flex;justify-content:space-between;gap:12px;color:#fff8e3;font-size:9px;letter-spacing:.1em}.intro-section{padding-block:75px 90px;border-top:1px solid var(--line)}.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;margin-top:24px}.intro-grid>div{max-width:500px}.text-link{display:inline-flex;gap:24px;align-items:center;font-size:13px;font-weight:600;color:var(--ink);border-bottom:1px solid #98a797;padding-bottom:5px;margin-top:22px}.text-link span{font-size:21px;line-height:1}.work-band{background:var(--sand);padding-block:76px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:45px}.work-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:38px}.work-item{position:relative;border-top:1px solid #aeb9a9;padding-top:22px;min-height:220px;padding-right:30px}.work-item:hover{text-decoration:none}.work-item:hover h3{text-decoration:underline;text-underline-offset:6px}.number{font-size:10px;color:var(--muted);letter-spacing:.13em}.work-item h3{margin-top:25px;margin-bottom:14px}.work-item p{font-size:14px;max-width:270px;color:#5d695f}.circle-arrow{position:absolute;right:0;top:20px;width:30px;height:30px;border:1px solid #afbaa9;display:grid;place-items:center;border-radius:50%;color:var(--ink)}.update-section{display:grid;grid-template-columns:1fr 1fr;gap:70px;padding-block:90px}.update-section h2{margin-top:22px}.update-section>div+div{padding-top:30px;max-width:480px}.date{font-size:12px;color:var(--orange);margin-bottom:13px}.site-footer{background:var(--ink);color:#e8eadc;padding-block:55px 22px}.site-footer .brand{color:#f5f3eb}.footer-top{display:grid;grid-template-columns:1fr 1fr auto;gap:50px;align-items:start;padding-bottom:45px}.footer-top>p{font:1.65rem/1.35 var(--serif)}.footer-top nav{display:grid;gap:6px;font-size:12px}.footer-bottom{border-top:1px solid #476457;padding-top:19px;display:flex;justify-content:space-between;gap:20px;font-size:10px;color:#bdcbbd}.page-intro{padding-block:75px 50px}.page-intro h1{margin-top:24px}.page-intro .lead{margin-top:27px;max-width:560px}.page-index{display:flex;gap:30px;font-size:12px;margin-top:35px;flex-wrap:wrap}.page-index a{border-bottom:1px solid #b3bdad;padding-bottom:7px}.service-list{padding-bottom:45px}.service-row{display:grid;grid-template-columns:90px 1.15fr 1fr;gap:35px;padding-block:52px;border-top:1px solid var(--line);scroll-margin-top:32px}.big-number{font:2.7rem/1 var(--serif);color:#8b9b88}.service-row h2{font-size:2.5rem;margin:13px 0 20px}.service-row p{max-width:470px;font-size:15px}.service-row ul{font-size:14px;color:#5d6b5f;align-self:center;padding-left:20px;line-height:2}.next-section{padding-block:55px 85px;display:grid;grid-template-columns:1fr 1fr;gap:70px}.next-section h2{margin-top:20px}.next-section>div+div{align-self:end;max-width:480px}.next-section .button{margin-top:25px}.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;padding-block:20px 90px}.method-steps article{display:flex;gap:25px;padding-block:27px;border-top:1px solid var(--line)}.step-number{font-size:11px;color:var(--orange);padding-top:10px}.method-steps h2{font-size:1.8rem;margin-bottom:13px}.method-steps p{font-size:15px;max-width:420px}.visit-sheet{background:var(--white);padding:35px 38px;border:1px solid #d8dccf;transform:rotate(1deg);box-shadow:0 12px 35px #173d3209}.sheet-top{display:flex;justify-content:space-between;font-size:9px;letter-spacing:.12em;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px}.visit-sheet h2{font-size:2.3rem;margin-block:24px}.visit-sheet dl{margin:0 0 28px}.visit-sheet dl>div{display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid #e8ebdf;padding-block:10px;font-size:12px}.visit-sheet dt{color:var(--muted)}.visit-sheet dd{margin:0;text-align:right}.status{color:#8b511e;background:#f3e9d0;padding:3px 7px;font-size:10px}.visit-sheet h3{font:600 11px var(--sans);margin-bottom:14px}.checks{padding:0;list-style:none;font-size:12px}.checks li{margin-bottom:12px;display:flex;gap:12px;align-items:center}.checks span{color:var(--ink);font-size:17px}.sheet-note{font-size:10px;color:var(--muted);line-height:1.6;border-top:1px solid var(--line);padding-top:18px;margin-top:22px}.document-section{display:grid;grid-template-columns:1fr 1fr;gap:70px}.document-section h2{margin-top:20px}.document-section>div+div{max-width:490px;padding-top:18px}.back-section{display:flex;justify-content:space-between;gap:30px;align-items:center;padding-block:60px}
@media(min-width:1600px){.hero-grid{gap:110px}.hero-copy h1{font-size:5.3rem}}@media(max-width:900px){.wrap{width:calc(100% - 48px)}.hero-grid{gap:30px}.hero-copy h1{font-size:3.7rem}.hero-art img{min-height:510px}.header-inner nav{gap:20px}.intro-grid,.update-section,.next-section,.method-grid,.document-section{gap:35px}.work-grid{gap:24px}.service-row{grid-template-columns:45px 1fr 1fr;gap:22px}.visit-sheet{padding:25px}.footer-top{gap:30px}}@media(max-width:650px){.wrap{width:calc(100% - 40px)}.header-inner{min-height:135px;align-items:flex-start;justify-content:center;flex-direction:column;gap:19px;padding-block:20px}.brand>span{font-size:1.45rem}.brand svg{width:25px}.header-inner nav{width:100%;justify-content:space-between;gap:12px}.header-inner nav a{font-size:12px}.hero-grid{grid-template-columns:1fr;padding-block:35px 42px;gap:35px}.hero-copy h1{font-size:3.9rem}.hero-copy .eyebrow{font-size:9px;margin-bottom:22px}.hero-copy .lead{font-size:16px;margin-top:22px}.hero-foot{margin-top:25px}.hero-art{height:420px}.hero-art img{min-height:0}.hero-art figcaption{font-size:8px}.intro-section{padding-block:45px}.intro-grid,.update-section,.next-section,.method-grid,.document-section{grid-template-columns:1fr;gap:24px}.intro-grid>div{font-size:15px}.work-band{padding-block:45px}.section-heading{display:block;margin-bottom:28px}.section-heading .text-link{margin-top:25px}.work-grid{grid-template-columns:1fr;gap:22px}.work-item{min-height:0;padding-bottom:12px}.work-item h3{margin-top:12px}.work-item p{max-width:none}.update-section{padding-block:48px}.update-section>div+div{padding-top:0}.update-section h2{margin-top:15px}.footer-top{grid-template-columns:1fr;gap:30px}.footer-top nav{display:flex;gap:22px;flex-wrap:wrap}.footer-bottom{flex-direction:column;gap:7px}.page-intro{padding-block:40px 35px}.page-intro h1{font-size:3.3rem}.page-index{gap:20px}.service-row{grid-template-columns:35px 1fr;padding-block:35px}.service-row ul{grid-column:2;margin:0}.service-row h2{font-size:2rem}.big-number{font-size:1.8rem}.service-list{padding-bottom:10px}.next-section{padding-block:25px 50px}.method-grid{padding-block:0 45px}.visit-sheet{transform:none}.document-section>div+div{padding-top:0}.back-section{display:block;padding-block:40px}.back-section .button{margin-top:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Unidad 4: controles del ejemplo de seguimiento. */
.volver-arriba{position:fixed;right:20px;bottom:20px;border:1px solid var(--line);background:var(--white);color:var(--ink);padding:10px 16px;font:600 13px var(--sans);cursor:pointer;z-index:10;box-shadow:0 3px 15px #173d3214}
.volver-arriba[hidden]{display:none}.volver-arriba:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--orange);outline-offset:4px}
.lista-visita{display:grid;gap:17px}.lista-visita label{display:flex;align-items:flex-start;gap:12px;font-size:14px;cursor:pointer}.lista-visita input{width:18px;height:18px;flex-shrink:0;accent-color:var(--ink);margin:3px 0 0}.lista-visita progress{width:100%;height:12px;accent-color:var(--ink)}.lista-visita output{font-size:13px;color:var(--ink)}.lista-visita button{border:1px solid var(--ink);background:transparent;color:var(--ink);padding:10px 14px;font:600 12px var(--sans);cursor:pointer;justify-self:start}.lista-visita fieldset{border:0;padding:0;margin:0;display:grid;gap:17px}.lista-visita legend{font-weight:600;font-size:13px;margin-bottom:17px}.visit-sheet .sheet-note{margin-top:22px}.visit-sheet h2{line-height:1.15}