@charset "UTF-8";
:root{--red:#bd2428;--red-bright:#e53535;--ink:#222426;--muted:#65696b;--line:#e5e5e1;--paper:#f5f5f2;--black:#101112;--width:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:#fff;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.65}a{color:inherit}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}img{max-width:100%;height:auto;display:block}button{border:0}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #2872b9;outline-offset:5px}[hidden]{display:none!important}.wrap{max-width:var(--width);width:calc(100% - 80px);margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-100px;left:16px;background:white;color:#111;padding:12px;z-index:100}.skip-link:focus{top:10px}
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.hero{position:relative;min-height:560px;display:flex;align-items:center;background:#202020;color:white;isolation:isolate}.hero-image,.hero-shade{position:absolute;inset:0;width:100%;height:100%;z-index:-2}.hero-image{object-fit:cover;object-position:center top}.hero-shade{z-index:-1;background:linear-gradient(90deg,rgba(9,12,12,.88),rgba(9,12,12,.62) 42%,rgba(9,12,12,.06) 100%)}.hero-content{padding-block:65px 80px}.eyebrow{font-size:11px;line-height:1.5;letter-spacing:2px;font-weight:700;margin:0 0 14px;text-transform:uppercase}.hero .eyebrow{color:#ff7778}.hero h1{font-size:clamp(38px,4.6vw,66px);line-height:1.08;letter-spacing:-2.3px;margin:0 0 24px;max-width:700px;font-weight:800}.hero h1 em{font-style:normal;color:#ff6668}.hero-content>p:not(.eyebrow){color:#e4e4e4;line-height:1.7;margin:0 0 30px;font-size:17px}.button{display:inline-flex;gap:28px;align-items:center;justify-content:center;background:var(--red);color:white;text-decoration:none;padding:14px 22px;font-size:14px;font-weight:700;border-radius:3px;transition:background .15s}.button:hover{background:#9d1e22}.button span{font-size:20px}.hero-caption{position:absolute;right:40px;bottom:20px;font-size:9px;letter-spacing:2px;color:#dedede}.intro-strip{display:flex;justify-content:space-between;gap:20px;padding-block:23px;border-bottom:1px solid var(--line);color:#565a5c;font-size:12px}.intro-strip b{color:var(--red);font-size:11px;letter-spacing:1px;margin-right:12px}
.catalogue{padding-block:72px 80px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:50px;margin-bottom:34px}.section-heading .eyebrow{color:var(--red)}.section-heading h2{font-size:36px;line-height:1.18;letter-spacing:-1.1px;margin:0;font-weight:750}.section-heading>p{max-width:320px;margin:0 0 3px;color:var(--muted);font-size:14px}.catalogue-tools{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:22px;border-bottom:1px solid var(--line)}.filters{display:flex;flex-wrap:wrap;gap:6px}.filter{background:transparent;color:#555a5c;padding:8px 12px;border-radius:3px;font-size:12px;min-height:38px}.filter:hover{background:var(--paper)}.filter[aria-pressed=true]{background:var(--ink);color:#fff}.search{display:flex;align-items:center;gap:8px;min-width:210px;border:1px solid #d7d9d8;border-radius:3px;padding:7px 12px}.search>span[aria-hidden]{font-size:22px;line-height:1}.search input{width:170px;min-width:0;border:0;background:transparent;font-size:12px;padding:4px;color:var(--ink)}.search input:focus{outline-offset:7px}.result-count{font-size:12px;margin:15px 0 0;color:var(--muted)}.tutorial{display:grid;grid-template-columns:220px 1fr auto;gap:30px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}.tutorial-image{overflow:hidden;border-radius:4px;background:var(--paper)}.tutorial-image img{width:100%;height:150px;object-fit:cover;transition:transform .2s}.tutorial:hover .tutorial-image img{transform:scale(1.025)}.tutorial-copy .eyebrow{color:var(--muted);font-size:9px;letter-spacing:1.5px;margin-bottom:7px}.tutorial h3{font-size:23px;line-height:1.2;letter-spacing:-.4px;margin:0 0 8px;color:var(--red)}.tutorial h3 a{text-decoration:none}.tutorial h3 a:hover{text-decoration:underline;text-underline-offset:4px}.tutorial-description{font-size:14px;color:#626668;margin:0;max-width:600px}.tutorial-meta-line{font-size:11px;color:#74787a;margin:12px 0 0;display:flex;gap:10px;align-items:center}.read-link{font-size:11px;text-decoration:none;font-weight:700;white-space:nowrap;display:flex;align-items:center;gap:15px;padding:12px 0 12px 12px}.read-link span{font-size:20px;color:var(--red)}.read-link:hover{color:var(--red)}.empty-state{padding:50px 15px;text-align:center}.empty-state h3{font-size:23px}.manual-section{background:var(--paper);padding:65px 0}.manual-inner{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.manual-inner .eyebrow{color:var(--red)}.manual-inner h2{font-size:36px;line-height:1.2;letter-spacing:-1px;margin:0}.manual-inner h2 span{color:var(--red)}.manual-inner>div>p:not(.eyebrow){color:var(--muted);font-size:15px}.text-link{font-size:13px;font-weight:700;text-decoration:none;display:inline-flex;gap:18px;margin-top:15px;padding-bottom:7px;border-bottom:1px solid var(--red)}
.site-footer{background:var(--black);color:#bfc0c1;padding:32px 0}.footer-inner{width:calc(100% - 80px);max-width:var(--width);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.footer-brand{font-size:22px;color:white;letter-spacing:-.7px;font-weight:700;text-decoration:none}.footer-brand span{color:#ff6266}.footer-inner p{font-size:12px;margin:0}.footer-inner>a:last-child{font-size:11px;text-decoration:none}
.article-wrap{padding-top:30px;padding-bottom:80px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:11px;margin-bottom:44px}.breadcrumbs a{text-decoration:none}.article-layout{display:grid;grid-template-columns:minmax(0,800px) 220px;gap:75px}.tutorial-page{min-width:0}.tutorial-page>.eyebrow{color:var(--red)}.tutorial-page h1{font-size:clamp(32px,4vw,48px);line-height:1.12;letter-spacing:-1.4px;margin:0 0 23px}.tutorial-intro{font-size:18px;color:#606668;line-height:1.75;margin:0 0 30px}.tutorial-meta{display:grid;grid-template-columns:repeat(3,1fr);background:var(--paper);margin:28px 0 40px;border-radius:4px;padding:22px 0}.meta-box{padding:0 24px;border-right:1px solid #dcdcda}.meta-box:last-child{border:0}.meta-label{font-size:11px;color:var(--muted);margin-bottom:5px}.meta-value{font-size:16px;font-weight:700}.tutorial-card{margin:35px 0}.tutorial-page h2{font-size:27px;line-height:1.3;color:var(--red);letter-spacing:-.5px;margin:40px 0 18px;scroll-margin-top:108px}.tutorial-page h3{font-size:21px;line-height:1.4;margin:24px 0 12px;letter-spacing:-.3px}.tutorial-page p{margin-block:12px}.tutorial-page li{padding-left:4px;margin:8px 0}.tutorial-page ul,.tutorial-page ol{padding-left:23px}.tutorial-page a{color:var(--red);text-underline-offset:3px}.callout{background:#faf3ee;border-left:3px solid #cb8a4b;padding:17px 21px;font-size:14px;border-radius:0 3px 3px 0;margin:24px 0}.callout strong{font-size:12px;letter-spacing:.4px}.steps{display:grid;gap:15px}.step{border-top:1px solid var(--line);padding-top:10px;margin-top:24px}.figure{margin:20px 0 0}.figure img{width:100%;height:auto;max-height:660px;object-fit:contain;background:#f4f4f1;border-radius:4px}.caption{font-size:11px;color:var(--muted);margin-top:8px;line-height:1.5}.img-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.img-grid .figure img{aspect-ratio:4/3;object-fit:contain}.article-aside{padding-top:12px}.toc{position:sticky;top:112px}.toc-links{display:flex;flex-direction:column;gap:14px}.toc-links a{font-size:12px;line-height:1.4;text-decoration:none;color:#5f6466}.toc-links a:hover{color:var(--red)}.aside-note{font-size:12px;color:#6d7173;border-top:1px solid var(--line);padding-top:20px;margin-top:25px}.aside-more{margin-top:55px;border-top:2px solid var(--red);padding-top:20px;display:flex;flex-direction:column;gap:12px}.aside-more a{font-size:12px;text-decoration:none}.article-end{margin-top:50px;padding-top:25px;border-top:1px solid var(--line);font-size:14px}.archive-note{font-size:12px!important;background:var(--paper);padding:14px 18px;color:#626668;border-left:2px solid #999}.legacy-content{overflow-wrap:anywhere}.legacy-content p{margin:18px 0}.legacy-content img{max-width:100%;height:auto;max-height:650px;object-fit:contain;margin:25px auto}.legacy-content table{border-collapse:collapse;width:100%;font-size:13px;margin:20px 0}.legacy-content td,.legacy-content th{border:1px solid var(--line);padding:10px;vertical-align:top}.maintenance-table{overflow-x:auto}.maintenance-table table{min-width:550px}
@media(min-width:1500px){.hero{min-height:620px}}
@media(max-width:1200px){#main-nav{gap:16px}#main-nav a{font-size:12px}.brand{font-size:23px}.header-inner{gap:20px}.article-layout{gap:40px}}
@media(max-width:1100px){.header-inner{min-height:74px;flex-wrap:wrap;gap:0}.brand img{width:40px;height:52px}.js .menu-toggle{display:block}#main-nav{width:100%;flex-wrap:wrap;gap:0;padding:10px 0 20px}#main-nav a{padding:12px 18px 12px 0;min-width:33.333%}#main-nav a[aria-current]:after{display:none}.js #main-nav{display:none}.js #main-nav.is-open{display:flex}.hero{min-height:520px}.catalogue-tools{align-items:flex-start;flex-wrap:wrap}.section-heading h2{font-size:32px}.tutorial{grid-template-columns:190px 1fr;gap:25px}.tutorial-image img{height:140px}.read-link{display:none}.article-layout{grid-template-columns:minmax(0,1fr) 190px;gap:35px}.manual-inner{gap:45px}}
@media(max-width:760px){.wrap,.footer-inner{width:calc(100% - 40px)}.header-inner{width:calc(100% - 32px)}.hero{min-height:490px}.hero-content{padding-block:55px 65px}.hero h1{font-size:43px;letter-spacing:-1.5px}.hero-image{object-position:58% center}.hero-shade{background:linear-gradient(90deg,rgba(9,12,12,.88),rgba(9,12,12,.55))}.hero-content>p:not(.eyebrow){font-size:15px}.hero-caption{font-size:8px;right:20px}.intro-strip{gap:10px;font-size:10px;padding-block:18px}.intro-strip span{flex:1}.intro-strip b{display:block;margin:0 0 4px}.catalogue{padding-block:48px}.section-heading{display:block;margin-bottom:25px}.section-heading h2{font-size:30px}.section-heading>p{margin-top:18px;max-width:440px}.catalogue-tools{gap:16px}.search{width:100%}.search input{width:100%;font-size:14px}.filter{font-size:11px;padding:8px 10px}.tutorial{grid-template-columns:128px 1fr;gap:19px;padding:23px 0;align-items:start}.tutorial-image img{height:125px}.tutorial h3{font-size:19px;line-height:1.25}.tutorial-description{font-size:12px;line-height:1.55}.tutorial-meta-line{font-size:10px;flex-wrap:wrap;gap:5px}.tutorial-copy .eyebrow{font-size:8px;margin-bottom:5px}.manual-section{padding:42px 0}.manual-inner{grid-template-columns:1fr;gap:20px}.manual-inner h2{font-size:30px}.footer-inner{flex-wrap:wrap;gap:15px}.footer-inner p{order:3;width:100%;font-size:11px}.article-wrap{padding-top:23px;padding-bottom:45px}.breadcrumbs{margin-bottom:28px}.article-layout{display:block}.article-aside{display:none}.tutorial-page h1{font-size:35px;letter-spacing:-1px}.tutorial-intro{font-size:16px}.tutorial-meta{padding:16px 0;margin:23px 0 30px}.meta-box{padding:0 14px}.meta-value{font-size:13px}.meta-label{font-size:10px}.tutorial-page h2{font-size:25px}.tutorial-page h3{font-size:20px}.img-grid{grid-template-columns:1fr}.tutorial-page{font-size:15px}.callout{padding:15px}.legacy-content table{font-size:12px}}
@media(max-width:380px){.hero h1{font-size:37px}.tutorial{grid-template-columns:95px 1fr;gap:14px}.tutorial-image img{height:105px}.tutorial h3{font-size:17px}.brand{font-size:21px}#main-nav a{min-width:50%}.meta-box{padding:0 10px}.hero-content>p:not(.eyebrow) br{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Conservar la parte superior de la foto; en móvil se muestra completa. */
@media (max-width:760px) {
  .hero {display:block;min-height:0;background:var(--black)}
  .hero-image {position:relative;inset:auto;z-index:auto;width:100%;height:auto;object-fit:contain;object-position:center top}
  .hero-shade,.hero-caption {display:none}
  .hero-content {padding-block:32px 38px}
}

/* Cabecera específica del tutorial de aceite: imagen completa, sin recortes. */
.article-banner {margin:0;background:#171714}
.article-banner img {display:block;width:100%;max-width:1600px;height:auto;margin-inline:auto}

/* Guías revisadas y movilidad eléctrica. */
.review-date{font-size:12px;color:var(--muted);margin:0 0 25px!important}
.article-sources{border-top:1px solid var(--line);margin-top:42px;padding-top:12px;font-size:13px;overflow-wrap:anywhere}
.article-sources h2{font-size:21px;margin-top:15px}
.electric-highlights{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:30px 0}
.electric-highlights>div{padding:20px 16px;background:var(--black);border-radius:5px;color:white;border-top:3px solid var(--red)}
.electric-highlights span,.cost-example>span{display:block;font-size:10px;letter-spacing:1px;color:#ff9292}
.electric-highlights strong{display:block;font-size:18px;line-height:1.3;margin-top:12px}
.electric-highlights p{font-size:13px;color:#ddd;line-height:1.5}
.electric-options{display:grid;gap:14px}
.electric-options section{border:1px solid var(--line);border-left:3px solid var(--red);border-radius:4px;padding:18px 22px}
.electric-options h3{margin:0;color:var(--red)}
.electric-options p{margin-bottom:0}
.cost-example{background:var(--paper);border-radius:5px;padding:22px;margin:22px 0}
.cost-example>span{color:var(--muted);line-height:1.6}
.cost-example p{font-size:21px;line-height:1.6}
.cost-example strong{color:var(--red);white-space:nowrap}
.review-table{overflow-x:auto;margin:25px 0}
.review-table table{width:100%;border-collapse:collapse;font-size:14px}
.review-table th,.review-table td{text-align:left;vertical-align:top;padding:13px;border:1px solid var(--line)}
.review-table th{background:var(--paper)}
.tutorial-page a.official-link{color:white;text-decoration:none}
.review-table caption{text-align:left;font-size:13px;color:var(--muted);margin-bottom:12px}
.review-table tbody th{font-weight:700;background:#fafaf8;min-width:100px}
.maintenance-photo{max-width:500px;margin:24px auto}
.maintenance-diagram{max-width:700px;margin:24px auto}
.tyre-wear-photo{display:flex;align-items:center;gap:22px;padding:20px;background:var(--paper);border-radius:4px}
.tyre-wear-photo img{width:140px;max-width:40%;height:auto;flex-shrink:0}
.tyre-wear-photo .caption{margin:0;font-size:13px}
.article-aside .toc{position:static}
@media(max-width:600px){.electric-highlights{grid-template-columns:1fr}.electric-highlights>div{padding:17px 20px}.electric-highlights strong{margin-top:6px}.cost-example p{font-size:18px}.review-table th,.review-table td{padding:9px;font-size:12px}}

/* Apoyos visuales de la guía de aceite */
.oil-hero{margin:28px 0 34px}.oil-hero img{max-height:430px;object-fit:cover;object-position:center 55%}
.oil-standards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0 10px}
.oil-standard{border:1px solid var(--line);border-top:3px solid var(--red);border-radius:4px;padding:20px 16px;background:var(--paper);display:flex;flex-direction:column;align-items:flex-start}
.oil-standard-label{font-size:9px;letter-spacing:.7px;color:var(--muted)}
.oil-standard>strong{font-size:38px;line-height:1.2;margin:12px 0;color:var(--red)}
.oil-standard-example{font-size:12px;font-weight:700}.oil-standard p{font-size:12px;line-height:1.6}
@media(max-width:600px){.oil-standards{grid-template-columns:1fr}.oil-standard{padding:16px 20px}.oil-standard>strong{font-size:30px;margin:8px 0}.oil-hero img{max-height:none;object-fit:contain}}

/* Tabla ilustrada de materiales del escape */
.exhaust-table{border:1px solid var(--line);border-radius:8px;overflow-x:auto}
.exhaust-table:focus-visible{outline:2px solid var(--red);outline-offset:3px}
.exhaust-table table{min-width:780px;width:100%;font-size:12px;table-layout:fixed}
.exhaust-table thead th{background:var(--red);color:white;font-size:12px;padding:14px 9px;border-color:rgba(255,255,255,.18)}
.exhaust-table thead th:first-child{width:19%}.exhaust-table thead th:last-child{width:29%}
.exhaust-table tbody th,.exhaust-table tbody td{vertical-align:middle;padding:13px 9px;border:1px solid var(--line);background:white}
.exhaust-table tbody tr:nth-child(even) th,.exhaust-table tbody tr:nth-child(even) td{background:#fafaf8}
.exhaust-table tbody td:last-child{font-size:12px;line-height:1.6}
.exhaust-table tbody th{min-width:0}.exhaust-material-name{display:block;margin-top:8px;font-size:14px;line-height:1.3}
.exhaust-material-photo{display:block;position:relative;overflow:hidden;aspect-ratio:1.65;background:#fafaf8;border-radius:4px}
.exhaust-material-photo img{position:absolute;display:block;width:200%;max-width:none;height:200%;object-fit:fill;left:0;top:0}
.exhaust-material-photo.aluminium img{left:-100%}.exhaust-material-photo.carbon img{top:-100%}.exhaust-material-photo.titanium img{left:-100%;top:-100%}
@media(max-width:600px){.exhaust-table table{min-width:780px}.exhaust-table tbody th{position:sticky;left:0;z-index:1;box-shadow:3px 0 6px #00000008}.exhaust-table thead th:first-child{position:sticky;left:0;z-index:2}}

.exhaust-connections { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:clamp(8px,2vw,20px); margin:24px 0; }
.exhaust-connections .figure { margin:0; }
.exhaust-connections .figure > img { height:clamp(90px,20vw,180px); object-fit:contain; background:white; }
.exhaust-connections .caption { text-align:center; font-weight:700; font-size:14px; }

/* Materiales: fotografía grande, datos al lado y observaciones debajo */
.exhaust-material-cards{display:grid;gap:24px;margin:25px 0}
.exhaust-material-card{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:0 24px;border:1px solid var(--line);border-radius:8px;padding:20px;background:#fff;overflow:hidden;align-items:center}
.exhaust-material-card .exhaust-material-photo{width:100%;aspect-ratio:1.5;border-radius:5px}
.exhaust-material-details{margin:0}.exhaust-material-details>div{display:grid;grid-template-columns:1.3fr 1fr;gap:10px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.4}.exhaust-material-details>div:last-child{border-bottom:0}.exhaust-material-details dt{font-weight:700}.exhaust-material-details dd{margin:0}
.tutorial-page .exhaust-material-observations{grid-column:1/-1;border-top:1px solid var(--line);padding-top:16px;margin:16px 0 0;font-size:14px;line-height:1.65}.exhaust-material-observations strong{color:var(--red)}
@media(max-width:600px){.exhaust-material-card{grid-template-columns:1fr;padding:16px}.exhaust-material-card .exhaust-material-photo{margin-bottom:10px}.exhaust-material-details>div{font-size:14px;padding:11px 0}}

/* Original spark-plug photos: layout only, no retouching. */
.spark-sheet{margin:24px 0}.spark-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:5px}.spark-photo{display:block;position:relative;overflow:hidden;align-self:start}.spark-photo img{position:absolute;width:217.241379%;max-width:none;height:auto;max-height:none;margin:0;border-radius:0}@media(max-width:600px){.spark-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}}

@media (min-width: 761px) {
  .electric-guide {
    position: sticky;
    top: 112px;
    align-self: start;
    max-height: calc(100vh - 124px);
    overflow-y: auto;
    padding-top: 0;
  }
  .electric-guide .toc {
    border-top: 4px solid var(--red);
    background: #fcf5f5;
    padding: 16px;
  }
  .electric-guide .eyebrow,
  .electric-guide .toc-links a { color: var(--red); }
  .electric-guide .toc-links a { font-weight: 700; }
  .electric-guide .toc-links a:hover { text-decoration: underline; }
}