:root{--navy:#0B1220;--white:#FFFFFF;--bone:#F4EFE4;--gold:#D4AF37;--ink-80:rgba(11,18,32,.8);--ink-65:rgba(11,18,32,.68);--line:rgba(11,18,32,.16);--line-strong:rgba(11,18,32,.32);--w-80:rgba(255,255,255,.82);--w-65:rgba(255,255,255,.68);--w-line:rgba(255,255,255,.2);--serif:"Playfair Display",serif;--sans:"Inter",system-ui,sans-serif;--sec:96px}
@media (max-width:760px){:root{--sec:56px}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--white);color:var(--navy);font:400 16px/1.65 var(--sans);overflow-x:hidden;overflow-wrap:break-word}
html[lang="es"] [data-l="en"],html[lang="en"] [data-l="es"]{display:none!important}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--ink-65)}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul{padding:0;list-style:none}
button{font:inherit;color:inherit}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;z-index:100;background:var(--white);padding:8px 16px}

/* grid */
.wrap{max-width:1200px;margin:0 auto;padding:0 32px}
.text{max-width:960px}
@media (max-width:760px){.wrap{padding:0 24px}}
.sec{padding:var(--sec) 0}
.sec--white{background:var(--white)}
.sec--bone{background:var(--bone)}
.sec--navy{background:var(--navy);color:var(--white)}
.sec--navy a{color:var(--white)}
.stack-8>*+*{margin-top:8px}.stack-16>*+*{margin-top:16px}.stack-24>*+*{margin-top:24px}.stack-32>*+*{margin-top:32px}.stack-48>*+*{margin-top:48px}
.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:64px;align-items:start}
.split--even{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.split--wide{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
@media (max-width:900px){.split,.split--wide,.split--even{grid-template-columns:minmax(0,1fr);gap:32px}}

/* type */
.t-hero{font:500 clamp(40px,4.4vw + 12px,76px)/1.06 var(--serif);letter-spacing:-.01em;text-wrap:balance}
.t-40{font:500 40px/1.18 var(--serif);text-wrap:balance}
.t-28{font:500 28px/1.25 var(--serif);text-wrap:balance}
.t-20{font:500 20px/1.4 var(--serif)}
.lead{font-size:20px;line-height:1.55}
.small{font-size:14px;line-height:1.6}
.label{font:600 13px/1.4 var(--sans);letter-spacing:.14em;text-transform:uppercase}
.muted{color:var(--ink-65)}
.sec--navy .muted{color:var(--w-65)}
p{text-wrap:pretty}
@media (max-width:760px){.t-40{font-size:28px;line-height:1.25}.lead{font-size:18px}.small{font-size:16px}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 24px;border:1px solid var(--navy);border-radius:0;background:transparent;color:var(--navy);font:500 16px/1.25 var(--sans);text-decoration:none;cursor:pointer;text-align:center;transition:background .15s,color .15s}
.btn:hover{background:var(--navy);color:var(--white)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:var(--navy);font-weight:600}
.btn--gold:hover{background:#c9a42f;border-color:#c9a42f;color:var(--navy)}
.btn--light{border-color:rgba(255,255,255,.7);color:var(--white)}
.btn--light:hover{background:var(--white);color:var(--navy)}
.btn--solid-light{background:var(--white);border-color:var(--white);color:var(--navy);font-weight:600}
.btn--solid-light:hover{background:var(--bone);color:var(--navy)}
.sec--navy .btn--light,.sec--navy .btn--solid-light{color:inherit}
.sec--navy .btn--solid-light{color:var(--navy)}
.sec--navy .btn--light:hover,.sec--navy .btn--solid-light:hover{color:var(--navy)}
.link-arrow{display:inline-flex;align-items:center;min-height:44px;font-weight:500;text-decoration:none;border-bottom:1px solid currentColor;padding:10px 0 2px}
@media (max-width:520px){.btn{width:100%}}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:var(--navy);color:var(--white)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{font:500 22px/1 var(--serif);color:var(--white);text-decoration:none;white-space:nowrap}
.brand:hover{color:var(--white)}
.nav{display:flex;align-items:center;gap:32px}
.nav ul{display:flex;gap:28px}
.nav a{color:var(--white);text-decoration:none;font-size:15px;font-weight:500;padding:8px 0;border-bottom:1px solid transparent}
.nav a:hover{color:var(--white);border-bottom-color:rgba(255,255,255,.5)}
.nav a[aria-current="page"]{border-bottom-color:var(--white)}
.lang{display:flex;align-items:center;gap:4px;font-size:13px;font-weight:600;letter-spacing:.08em}
.lang button{background:none;border:0;color:var(--w-65);cursor:pointer;padding:8px 6px;min-height:44px;min-width:36px}
.lang button[aria-pressed="true"]{color:var(--white);text-decoration:underline;text-underline-offset:5px}
.lang span{color:var(--w-65)}
.nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.4);color:var(--white);width:48px;height:48px;font-size:22px;line-height:1;cursor:pointer;border-radius:0}
.mnav{display:none}
@media (max-width:900px){
 .nav{display:none}
 .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
 .hdr .wrap{min-height:64px}
 .brand{font-size:20px}
 .mnav{position:fixed;inset:0;z-index:60;background:var(--navy);color:var(--white);padding:16px 24px 40px;flex-direction:column;overflow-y:auto}
 body.nav-open{overflow:hidden}
 body.nav-open .mnav{display:flex}
 .mnav-top{display:flex;justify-content:space-between;align-items:center;min-height:48px}
 .mnav ul{margin-top:48px}
 .mnav li{border-bottom:1px solid var(--w-line)}
 .mnav li a{display:block;padding:16px 0;color:var(--white);text-decoration:none;font:500 28px/1.25 var(--serif)}
 .mnav .lang{margin-top:32px;font-size:16px}
}

/* hero */
.hero{position:relative;background:var(--navy);color:var(--white);overflow:hidden}
.hero img.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:68% 40%}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,18,32,.92) 0%,rgba(11,18,32,.78) 45%,rgba(11,18,32,.42) 100%)}
.hero .wrap{position:relative;z-index:1;min-height:min(720px,86vh);display:flex;align-items:flex-end;padding-top:120px;padding-bottom:var(--sec)}
.hero-copy{max-width:1040px}
.hero .sub{font-size:20px;line-height:1.5;color:var(--white)}
.hero .note{color:var(--w-80)}
.tags{display:flex;flex-wrap:wrap;gap:8px 16px;color:var(--w-80)}
.tags li+li::before{content:"·";margin-right:16px;color:var(--w-65)}
@media (max-width:760px){
 .hero::after{background:linear-gradient(180deg,rgba(11,18,32,.45) 0%,rgba(11,18,32,.82) 45%,rgba(11,18,32,.95) 100%)}
 .hero .wrap{min-height:auto;padding-top:220px}
 .hero .sub{font-size:18px}
}

/* quote */
.quote{font:400 italic 40px/1.25 var(--serif);max-width:960px;text-wrap:balance}
@media (max-width:760px){.quote{font-size:28px}}

/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:48px 32px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
@media (max-width:1000px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:900px){.grid-3{grid-template-columns:minmax(0,1fr)}}
@media (max-width:640px){.grid-2,.grid-4{grid-template-columns:minmax(0,1fr)}}
.pub{display:flex;flex-direction:column;gap:16px}
.pub .cover{display:block;aspect-ratio:3/4;overflow:hidden;border:1px solid var(--line);background:var(--bone)}
.pub .cover img{width:100%;height:100%;object-fit:cover;object-position:top}
.pub .btn{align-self:flex-start;margin-top:auto}
@media (max-width:900px){.pub{display:grid;grid-template-columns:120px minmax(0,1fr);gap:8px 20px;align-items:start}.pub .cover{grid-row:1 / span 5}.pub .btn{margin-top:8px}}
@media (max-width:520px){.pub{grid-template-columns:minmax(0,1fr)}.pub .cover{grid-row:auto;max-width:200px}}

/* section head */
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:48px}
@media (max-width:760px){.sec-head{margin-bottom:32px}}

/* posts */
.post{border-top:1px solid var(--navy);padding-top:24px;display:flex;flex-direction:column;gap:12px}
.post h3 a{text-decoration:none}
.post h3 a:hover{text-decoration:underline}
.post .link-arrow{align-self:flex-start;margin-top:auto}

/* scope */
.scope li{border-top:1px solid var(--w-line);padding-top:24px}
.scope .num{font:400 28px/1 var(--serif);color:var(--w-65);margin-bottom:24px}
.scope p{color:var(--w-80)}
.who{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line-strong)}
.who li{padding:24px 24px 24px 0;border-bottom:1px solid var(--line-strong);font:500 20px/1.4 var(--serif)}
@media (max-width:760px){.who{grid-template-columns:minmax(0,1fr)}.who li{padding:16px 0}}

/* forms */
.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.form .full{grid-column:1 / -1}
@media (max-width:640px){.form{grid-template-columns:minmax(0,1fr)}}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:14px;font-weight:500}
.field .req{color:var(--ink-65)}
.field input,.field select,.field textarea{width:100%;min-height:48px;padding:12px 14px;border:1px solid var(--line-strong);border-radius:0;background:var(--white);color:var(--navy);font:400 16px/1.4 var(--sans);-webkit-appearance:none;appearance:none}
.field textarea{min-height:160px;resize:vertical}
.field select{padding-right:40px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%230B1220' stroke-width='1.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--navy);outline-offset:1px;border-color:var(--navy)}
.sec--navy .field label{color:var(--white)}
.sec--navy .field .req{color:var(--w-65)}
.sec--navy .field input:focus,.sec--navy .field select:focus{outline-color:var(--white)}
.notice{border:1px solid var(--navy);padding:20px 24px;font-size:16px}
.notice[hidden]{display:none}
@media (max-width:640px){.form .btn{width:100%}}
@media (max-width:760px){.field label{font-size:16px}}

/* buttons extra */
.btn--navy{background:var(--navy);color:var(--white);font-weight:600}
.btn--navy:hover{background:rgba(11,18,32,.86);color:var(--white)}
.btns{display:flex;flex-wrap:wrap;gap:12px}
.back{display:inline-flex;align-items:center;min-height:44px;color:inherit;text-decoration:none;font-size:15px}
.back:hover{text-decoration:underline;color:inherit}
.sec--navy .back{color:var(--w-80)}

/* page hero (inner pages) */
.phero{padding:var(--sec) 0}
.phero h1{max-width:980px}

/* books */
.books{display:grid;grid-template-columns:repeat(2,minmax(0,340px));gap:48px;justify-content:center}
.book{position:relative;display:flex;flex-direction:column;justify-content:space-between;gap:24px;aspect-ratio:3/4;padding:40px 32px 32px 60px;background:var(--bone);color:var(--navy);border:1px solid var(--line-strong);text-decoration:none;transition:transform .2s ease}
.book::before{content:"";position:absolute;left:0;top:0;bottom:0;width:20px;background:var(--navy)}
.book:hover{transform:translateY(-4px);color:var(--navy)}
.sec--navy .book:not(.book--dark),.sec--navy .book:not(.book--dark):hover{color:var(--navy)}
.sec--navy .book:not(.book--dark) .muted{color:var(--ink-65)}
.book--dark{background:var(--navy);color:var(--white);border-color:var(--navy)}
.book--dark::before{background:rgba(255,255,255,.16)}
.book--dark:hover{color:var(--white)}
.book--dark .muted{color:var(--w-65)}
.book .cta{display:inline-flex;align-items:center;min-height:44px;border-bottom:1px solid currentColor;align-self:flex-start;font-weight:500}
@media (max-width:760px){.books{grid-template-columns:minmax(0,1fr)}.book{aspect-ratio:auto;min-height:420px;padding:32px 24px 24px 48px}}

/* course */
.stats{display:flex;flex-wrap:wrap;gap:48px}
.stats .n{font:500 40px/1 var(--serif);margin-top:8px}
.modlist{border-top:1px solid var(--line-strong)}
.modlist li{display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:16px;align-items:baseline;padding:20px 0;border-bottom:1px solid var(--line-strong)}
.modlist .num{font:400 20px/1 var(--serif);color:var(--ink-65)}
.modlist .min{font-size:14px;color:var(--ink-65);white-space:nowrap}
@media (max-width:520px){.modlist li{grid-template-columns:40px minmax(0,1fr)}.modlist .min{grid-column:2;font-size:16px}}
.dash li{position:relative;padding:12px 0 12px 32px;border-top:1px solid var(--line)}
.dash li::before{content:"—";position:absolute;left:0}
.sec--navy .dash li{border-color:var(--w-line)}
.numlist li{display:grid;grid-template-columns:48px minmax(0,1fr);gap:16px;padding:20px 0;border-top:1px solid var(--w-line)}
.numlist .num{font:400 20px/1.4 var(--serif);color:var(--w-65)}
.icon-box{aspect-ratio:1/1;border:1px solid var(--line);background:var(--white);display:flex;align-items:center;justify-content:center;padding:32px}
.icon-box img{max-height:100%;width:auto;object-fit:contain}

/* articles list */
.rows{border-top:1px solid var(--navy)}
.rows li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 32px;align-items:end;padding:24px 0;border-bottom:1px solid var(--line-strong)}
.rows h3 a{text-decoration:none}
.rows h3 a:hover{text-decoration:underline}
@media (max-width:640px){.rows li{grid-template-columns:minmax(0,1fr)}}

/* prose */
.prose{font-size:18px;line-height:1.75}
.prose>*+*{margin-top:20px}
.prose h2{font:500 28px/1.25 var(--serif);margin-top:48px}
.prose h3{font:500 20px/1.4 var(--serif);margin-top:32px}
.prose ul,.prose ol{padding-left:24px}
.prose ul{list-style:disc}
.prose li+li{margin-top:8px}
.prose blockquote{margin:32px 0;padding-left:24px;border-left:1px solid var(--navy);font:400 italic 20px/1.5 var(--serif)}
.prose table{width:100%;border-collapse:collapse;font-size:16px;display:block;overflow-x:auto}
.prose th,.prose td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line-strong);vertical-align:top}
.prose a{word-break:break-word}
@media (max-width:760px){.prose{font-size:17px}.prose h2{font-size:24px}}
.figure{margin:0}
.figure img{width:100%;aspect-ratio:16/9;object-fit:cover}

.ccard{display:flex;flex-direction:column;gap:16px}
.ccard .btn{align-self:flex-start;margin-top:auto}
@media (max-width:900px){.ccard .icon-box{max-width:240px}}

/* course */
.course-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:56px;align-items:start}
.side{position:sticky;top:96px;max-height:calc(100vh - 120px);overflow-y:auto;padding-bottom:24px}
.side summary{display:none}
.side ul a{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:44px;padding:8px 0;border-bottom:1px solid var(--line);text-decoration:none;font-size:15px;line-height:1.35}
.side ul a:hover{color:var(--navy);text-decoration:underline}
.side .min{font-size:13px;color:var(--ink-65);white-space:nowrap}
.side .chk{display:inline-block;width:18px;visibility:hidden}
.side a.is-done .chk{visibility:visible}
.side a.is-current{font-weight:600}
.bar{height:4px;background:var(--line)}
.bar-fill{height:100%;background:var(--navy);transition:width .3s}
.module{margin-top:96px;padding-top:56px;border-top:1px solid var(--line-strong);scroll-margin-top:72px}
.module>h2{margin:12px 0 32px}
#overview{scroll-margin-top:96px}
.prose h4{font:600 18px/1.4 var(--sans);margin-top:32px}
.prose ol{list-style:decimal}
.prose .dash{list-style:none;padding-left:0}
.box{background:var(--bone);padding:32px}
.box>*+*{margin-top:16px}
.box h3{margin-top:8px}
.box--navy{background:var(--navy);color:var(--white)}
.box--navy a:not(.btn){color:var(--white)}
.box--navy .dash li{border-color:var(--w-line);font-size:16px}
.inside{gap:16px}
.card{border:1px solid var(--line-strong);padding:24px;font-size:16px}
.card>*+*{margin-top:12px}
@media (max-width:1000px){
 .course-grid{grid-template-columns:minmax(0,1fr);gap:24px}
 .side{position:sticky;top:64px;z-index:5;max-height:none;overflow:visible;background:var(--white);margin:0 -24px;padding:0 24px;border-bottom:1px solid var(--line-strong)}
 .side summary{display:flex;align-items:center;justify-content:space-between;min-height:52px;cursor:pointer;list-style:none}
 .side summary::-webkit-details-marker{display:none}
 .side summary::after{content:"+";font:400 24px/1 var(--sans)}
 .side details[open] summary::after{content:"−"}
 .side details[open]>div{max-height:calc(100vh - 140px);overflow-y:auto;padding-bottom:24px}
 .module{margin-top:56px;padding-top:40px;scroll-margin-top:124px}
 .box{padding:24px}
}

/* about */
.about-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:64px;align-items:start}
.portrait{aspect-ratio:1539/2119;background:var(--bone);overflow:hidden}
.portrait img{width:100%;height:100%;object-fit:cover;object-position:50% 30%}
.about-text{padding-top:8px}
.signature{font:400 italic 28px/1.2 var(--serif)}
@media (max-width:900px){.about-grid{grid-template-columns:minmax(0,1fr);gap:40px}.portrait{max-width:480px}}

/* footer */
.ftr{background:var(--navy);color:var(--white);padding:72px 0 32px}
.ftr a{color:var(--white)}
.ftr-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.ftr .label{color:var(--w-65);margin-bottom:16px}
.ftr address{font-style:normal}
.icons{display:flex;gap:12px}
.icons a{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--w-line)}
.icons a:hover{border-color:var(--white)}
.ftr-links li a{display:inline-block;padding:4px 0;text-decoration:none}
.ftr-links li a:hover{text-decoration:underline}
.ftr-bottom{margin-top:56px;padding-top:24px;border-top:1px solid var(--w-line);color:var(--w-65);font-size:14px}
@media (max-width:760px){.ftr{padding:56px 0 32px}.ftr-cols{grid-template-columns:minmax(0,1fr);gap:40px}.ftr-links li a{padding:10px 0}.ftr-bottom{font-size:16px}}