@charset "UTF-8";
:root{--navy:#132c42;--blue:#235c81;--gold:#d6a342;--paper:#faf9f5;--ink:#152c3d;--muted:#526270;--line:#d7dedf;--display:Bahnschrift,'Arial Narrow','Segoe UI',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:112px}body{margin:0;padding:0;background:var(--paper);color:var(--ink);font:16px/1.6 'Segoe UI',Arial,sans-serif}a{color:inherit}img{max-width:100%;height:auto}button{font:inherit;cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #b27b15;outline-offset:5px}[hidden]{display:none!important}.az-wrap,.wrap{width:min(1240px,calc(100% - 64px));margin-inline:auto}.skip{position:fixed;top:-100px;left:15px;z-index:100;background:white;padding:12px}.skip:focus{top:12px}.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}
.az-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.az-header-inner{display:flex;align-items:center;gap:32px;min-height:86px}.az-brand{display:flex;align-items:center;gap:12px;font:700 26px/1 var(--display);text-decoration:none;white-space:nowrap}.az-brand img{width:39px;height:39px}.az-nav{display:flex;align-items:center;justify-content:flex-end;gap:25px;flex:1}.az-nav a{font-size:14px;text-decoration:none;white-space:nowrap;padding-block:31px 27px;border-bottom:4px solid transparent}.az-nav a[aria-current]{border-color:var(--gold);font-weight:700}.az-nav a:hover{color:var(--blue);border-bottom-color:var(--blue)}.menu-toggle{display:none;border:1px solid var(--line);padding:8px 13px;background:white;color:var(--ink);font-size:14px}.az-breadcrumbs{display:flex;flex-wrap:wrap;gap:9px;font-size:13px;color:var(--muted);padding-top:28px}.az-breadcrumbs a{text-decoration:none}.az-breadcrumbs a:hover{text-decoration:underline}.lesson-heading{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;padding:28px 0 36px}.section-kicker{font-size:13px;letter-spacing:1.7px;text-transform:uppercase;font-weight:700;color:var(--blue);margin:0 0 12px}.lesson-heading h1{font:650 clamp(38px,4.25vw,61px)/1.06 var(--display);letter-spacing:-1.8px;margin:0;max-width:900px}.lesson-deck{font-size:18px;max-width:740px;color:var(--muted);margin:19px 0 0;line-height:1.65}.notation-stamp{align-self:stretch;border-left:1px solid var(--line);padding-left:34px;display:flex;flex-direction:column;justify-content:center;min-width:175px}.notation-stamp strong{font:600 66px/1 var(--display);letter-spacing:-3px}.notation-stamp span{font-size:13px;color:var(--muted);margin-top:13px}.lesson-byline{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-top:19px}.lesson-byline strong{color:var(--ink)}
.cinema{background:var(--navy);color:white;padding:29px 0 31px}.cinema-label{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:19px}.cinema-label h2{font:500 23px/1.3 var(--display);margin:0}.cinema-label>a{font-size:14px;text-decoration:none;color:#d8e4ed}.lesson-video-grid{display:grid;grid-template-columns:minmax(0,1fr) 288px;gap:28px;align-items:start}.video-column{min-width:0}.video-stage{aspect-ratio:16/9;min-height:200px;background:#07151f;position:relative;overflow:hidden}.video-stage>img{width:100%;height:100%;display:block;object-fit:contain}.video-stage iframe{width:100%;height:100%;border:0;min-height:200px;display:block;position:absolute;inset:0}.load-video{position:absolute;inset:0;width:100%;height:100%;border:0;background:linear-gradient(transparent 63%,#07151f80);display:flex;align-items:center;justify-content:center;color:white}.play-disc{display:grid;place-items:center;width:76px;height:76px;border-radius:50%;background:var(--navy);box-shadow:0 0 0 7px #fff7}.play-disc svg{width:28px;height:28px;margin-left:4px;fill:white}.load-video:hover .play-disc{background:#24658d;transform:scale(1.06)}.video-consent{font-size:13px;line-height:1.6;color:#d0dce5;margin:11px 0 0}.video-consent a{text-underline-offset:3px}.video-actions{display:flex;gap:20px;align-items:center;justify-content:space-between;font-size:13px;margin-top:10px;color:#c6d6e1}.video-actions button{font-size:13px;padding:0;border:0;border-bottom:1px solid #a8bbc9;background:none;color:inherit}.video-status{font-size:14px;color:#fff0b6;margin:10px 0 0}.chapter-panel{background:#fff;color:var(--ink);padding:18px 19px 8px}.chapter-panel h3{font:600 20px var(--display);margin:0 0 10px}.chapter-panel a{display:grid;grid-template-columns:42px 1fr;gap:10px;border-top:1px solid #e3e8eb;padding:11px 0;font-size:14px;line-height:1.4;text-decoration:none}.chapter-panel a span{font-size:13px;color:#617381;font-variant-numeric:tabular-nums}.chapter-panel a:hover,.chapter-panel a[aria-current]{color:#1b597c;background:#edf3f6}.chapter-panel a[aria-current]{box-shadow:-3px 0 var(--gold);padding-left:7px;margin-left:-7px}.chapter-panel a[aria-current] span{color:#1b597c}
.article-layout{display:grid;grid-template-columns:225px minmax(0,790px);gap:65px;justify-content:center;padding-top:63px;padding-bottom:65px}.reading-nav{position:sticky;top:118px;align-self:start;border-top:3px solid var(--navy);padding-top:18px}.reading-nav h2{font:600 18px var(--display);margin:0 0 14px}.reading-nav a{display:block;font-size:14px;padding:8px 0;text-decoration:none;color:var(--muted);line-height:1.4}.reading-nav a:hover{color:var(--blue);text-decoration:underline}.reading-nav .return-video{margin-top:18px;border-top:1px solid var(--line);padding-top:17px;color:var(--blue)}.lesson-article{min-width:0;font:19px/1.8 Georgia,'Times New Roman',serif;color:#273944}.lesson-article .article-heading{font:650 36px/1.14 var(--display);letter-spacing:-.6px;margin:0 0 26px;color:var(--ink)}.lesson-article .section-kicker{font-family:'Segoe UI',Arial,sans-serif}.lesson-article p{margin:0 0 22px}.lesson-article .article-lead{font-size:22px;line-height:1.6;color:var(--ink)}.lesson-article h2:not(.article-heading){font:600 29px/1.22 var(--display);letter-spacing:-.4px;margin:46px 0 19px;color:var(--ink);scroll-margin-top:12px}.lesson-article strong{font-weight:700;color:var(--ink)}.lesson-figure{margin:32px 0}.lesson-figure img{width:100%;display:block;border:1px solid #dce2e5}.lesson-figure>a{display:block;cursor:zoom-in}.lesson-figure figcaption{font:14px/1.6 'Segoe UI',Arial,sans-serif;color:var(--muted);padding:13px 0 13px 17px;border-left:3px solid var(--gold);margin-top:12px}.lesson-figure figcaption span{display:block;color:var(--ink);font-weight:700;margin-bottom:3px}.course-next{border-top:1px solid var(--line);background:#eaf0f3;padding:34px 0}.course-next-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}.course-next h2{font:600 29px var(--display);margin:0 0 7px}.course-next p{font-size:15px;margin:0;color:var(--muted)}.az-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 21px;background:var(--navy);color:#fff;text-decoration:none;font-size:15px;border:1px solid var(--navy)}.az-button:hover{background:#245674}.az-footer{padding:36px 0;background:#fff;border-top:1px solid var(--line);font-size:14px}.az-footer-inner{display:flex;gap:25px;justify-content:space-between;align-items:center}.az-footer strong{font:600 23px var(--display)}.az-footer nav{display:flex;flex-wrap:wrap;gap:22px}.az-footer a{text-decoration:none}.az-footer a:hover{text-decoration:underline}
.az-dialog{border:0;border-top:5px solid var(--gold);padding:36px;width:min(470px,calc(100% - 32px));background:var(--paper);color:var(--ink);box-shadow:0 20px 90px #0004}.az-dialog::backdrop{background:#0a213b99;backdrop-filter:blur(3px)}.az-dialog h2{font:650 38px/1.2 var(--display);margin:0 0 15px}.az-dialog p{font-size:17px;line-height:1.65;margin:0 0 24px}.az-dialog .dialog-topic{font-size:13px;text-transform:uppercase;letter-spacing:1px;color:var(--blue);margin-bottom:10px}.legal-page{max-width:800px;padding-block:50px 70px}.legal-page h1{font:600 48px/1.1 var(--display);margin:0 0 28px;letter-spacing:-1px}.legal-page h2{font:600 25px/1.3 var(--display);margin:32px 0 12px}.legal-page p,.legal-page li{font-size:17px;line-height:1.8}.legal-page p{margin:0 0 16px}.catalogue-heading{padding-block:48px 28px;border-bottom:2px solid var(--navy)}.catalogue-heading h1{font:650 52px/1.08 var(--display);margin:0 0 18px;letter-spacing:-1px}.catalogue-heading p{max-width:770px;color:var(--muted);font-size:18px}.lesson-list{list-style:none;padding:0;margin:20px 0 65px}.lesson-list li{display:grid;grid-template-columns:55px 1fr auto;gap:22px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line)}.lesson-number{font:500 29px var(--display);color:#6b8597}.lesson-list h2{font:600 25px var(--display);margin:0 0 6px}.lesson-list p{font-size:15px;color:var(--muted);margin:0}.lesson-list a{font-size:15px;text-underline-offset:4px}.lesson-list li.current{border-left:4px solid var(--gold);padding-left:18px;background:#edf1f2}
/* La portada y el Cambio conservan su contenido y sus tableros. */
body.legacy-page{padding-left:0}.legacy-page .atlas-heading{padding-top:38px}.legacy-page .site-header{display:none}.legacy-page .wrap{width:min(1240px,calc(100% - 64px))}.legacy-page .article-toc{top:112px}.legacy-page .eyebrow{font-size:13px}
@media(max-width:1180px){.az-header-inner{gap:20px}.az-nav{gap:16px}.az-nav a{font-size:13px}.az-brand{font-size:23px}.lesson-video-grid{grid-template-columns:minmax(0,1fr) 270px;gap:22px}.article-layout{grid-template-columns:180px minmax(0,1fr);gap:35px}.notation-stamp{min-width:150px;padding-left:22px}}
@media(max-width:1000px){.az-header-inner{min-height:74px;justify-content:space-between;flex-wrap:wrap;padding-block:15px;gap:0}.menu-toggle{display:block}.az-nav{display:none;flex-basis:100%;padding-top:15px;flex-direction:column;align-items:stretch;gap:0}.az-nav.open{display:flex}.az-nav a{font-size:15px;padding:12px 0;border-bottom:1px solid var(--line)}.az-nav a[aria-current]{border-bottom:3px solid var(--gold)}.lesson-heading h1{font-size:45px}.notation-stamp{display:none}.lesson-heading{display:block}.lesson-video-grid{grid-template-columns:1fr}.chapter-panel nav{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}.chapter-panel{padding:20px}.article-layout{grid-template-columns:1fr;gap:30px;max-width:850px}.reading-nav{position:static}.reading-nav nav{display:grid;grid-template-columns:1fr 1fr;gap:0 23px}.reading-nav .return-video{display:none}.az-footer-inner{align-items:flex-start}.az-footer nav{gap:15px}}
@media(max-width:600px){html{scroll-padding-top:90px}.az-wrap,.wrap,.legacy-page .wrap{width:calc(100% - 36px)}.az-brand{font-size:23px;gap:9px}.az-brand img{width:32px;height:32px}.az-breadcrumbs{padding-top:20px;font-size:13px}.lesson-heading{padding:22px 0 27px}.lesson-heading h1{font-size:37px;letter-spacing:-1px}.lesson-deck{font-size:16px;margin-top:16px}.lesson-byline{gap:9px 15px;margin-top:16px}.cinema{padding:22px 0}.cinema-label{align-items:flex-start}.cinema-label h2{font-size:21px}.cinema-label>a{font-size:13px}.play-disc{width:60px;height:60px}.chapter-panel nav{grid-template-columns:1fr}.chapter-panel a{padding-block:12px}.chapter-panel{padding:18px}.video-actions{align-items:flex-start}.article-layout{padding-top:35px;padding-bottom:40px}.reading-nav nav{grid-template-columns:1fr}.lesson-article{font-size:18px;line-height:1.8}.lesson-article .article-heading{font-size:31px}.lesson-article .article-lead{font-size:20px}.lesson-article h2:not(.article-heading){font-size:26px;margin-top:35px}.lesson-figure figcaption{font-size:14px}.course-next-inner{display:block}.course-next .az-button{margin-top:22px}.az-footer-inner{display:block}.az-footer nav{margin-top:22px;gap:13px 20px}.az-dialog{padding:27px}.az-dialog h2{font-size:33px}.legal-page{padding-top:35px}.legal-page h1{font-size:37px}.catalogue-heading h1{font-size:39px}.lesson-list li{grid-template-columns:34px 1fr;gap:10px}.lesson-list li>a{grid-column:2}.lesson-list h2{font-size:23px}.lesson-list li.current{padding-left:12px}.lesson-number{font-size:24px}}
@media(min-width:761px) and (max-width:1000px){.menu-toggle{display:none}.az-header-inner{padding-bottom:0}.az-nav{display:flex;flex-direction:row;justify-content:space-between;gap:10px;padding-top:9px}.az-nav a{font-size:13px;padding:11px 0 14px}.az-nav a[aria-current]{border-bottom-width:3px}html{scroll-padding-top:140px}}
.video-stage{width:100%}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Entrada compacta y enlaces reconocibles a YouTube. */
.az-breadcrumbs{padding-top:16px}
.lesson-heading{padding:14px 0 22px;gap:26px}
.lesson-heading .section-kicker{margin-bottom:8px}
.lesson-heading h1{font-size:clamp(30px,3.2vw,43px);line-height:1.12;letter-spacing:-1px}
.lesson-deck{font-size:16px;line-height:1.5;margin-top:11px;max-width:830px}
.lesson-byline{margin-top:11px}
.notation-stamp strong{font-size:52px}
.cinema{padding-block:20px 24px}
.cinema-label{margin-bottom:14px}
.youtube-link{display:inline-flex;align-items:center;gap:9px}
.youtube-icon{width:25px;height:18px;flex:none;vertical-align:middle}
.az-footer-inner{display:grid;grid-template-columns:1fr auto;align-items:end;gap:22px}
.footer-brand{grid-column:1;grid-row:2;justify-self:start;font-size:25px}
.az-footer nav{grid-column:2;grid-row:1;align-items:center;margin:0}
@media(max-width:1000px){.lesson-heading h1{font-size:38px}}
@media(max-width:600px){.az-breadcrumbs{padding-top:13px}.lesson-heading{padding:12px 0 18px}.lesson-heading h1{font-size:30px;letter-spacing:-.6px}.lesson-deck{font-size:15px;margin-top:10px}.lesson-byline{margin-top:10px}.cinema-label{align-items:center}.cinema-label h2{font-size:19px}.cinema-label>a{white-space:nowrap;gap:6px}.youtube-icon{width:23px;height:17px}.az-footer-inner{grid-template-columns:1fr}.az-footer nav{grid-column:1;grid-row:1}.footer-brand{grid-row:2}}