:root{--bg:#000;--deep:#0B1220;--card:#0F1B2E;--sub:#16243A;--pri:#3B82F6;--acc:#60A5FA;--txt:#E2E8F0;--mut:#94A3B8;--faint:#475569;--line:rgba(59,130,246,.22)}
*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:84px}
body{background:var(--bg);color:var(--txt);font:400 16px/1.7 'Inter',sans-serif;overflow-x:hidden}
::selection{background:rgba(59,130,246,.35);color:#fff}
.navbar,.hero,main,.foot{position:relative;z-index:1}
.wrap{max-width:900px;margin:0 auto;padding:0 20px}
.navbar{position:fixed;top:12px;left:50%;transform:translateX(-50%);z-index:10;display:flex;align-items:center;gap:14px;max-width:calc(100vw - 20px);padding:8px 16px;background:rgba(11,18,32,.85);backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:999px;font-family:'Azeret Mono',monospace;font-size:12px}
.brand{color:var(--acc);font-weight:900;letter-spacing:.05em}
.links{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none}.links::-webkit-scrollbar{display:none}
.links a{color:var(--mut);text-decoration:none;padding:4px 9px;border-radius:999px;transition:.3s}
.links a:hover{color:#fff}.links a.active{background:var(--pri);color:#fff}
.hero{padding:150px 0 40px}
.title{font:900 clamp(2.2rem,7vw,4rem)/1.1 'Azeret Mono',monospace;letter-spacing:-.03em;margin-bottom:18px}
.title::after{content:'';display:inline-block;width:.45em;height:.9em;margin-left:.15em;background:var(--pri);vertical-align:-.1em;animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}
.hero p{color:var(--mut);margin-bottom:6px}.hero p strong{color:var(--acc);font-weight:600}
blockquote{margin:22px 0;padding:14px 18px;background:rgba(15,27,46,.8);border:1px solid var(--line);border-left:3px solid var(--pri);border-radius:6px;color:var(--mut)}
blockquote strong{color:var(--txt)}blockquote h3{margin:0 0 8px}
.index{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px;margin-top:34px}
.index a{display:flex;gap:12px;align-items:center;padding:12px 14px;background:rgba(15,27,46,.75);border:1px solid var(--line);border-radius:6px;color:var(--txt);text-decoration:none;font-size:14px;transition:.3s}
.index a:hover{border-color:var(--pri);transform:translateY(-2px);box-shadow:0 0 20px rgba(59,130,246,.15)}
.index b{font:600 13px 'Azeret Mono',monospace;color:var(--pri)}
.sec{padding:44px 0 6px}
.sec-head{display:flex;align-items:baseline;gap:14px;margin-bottom:22px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.sec-n{font:600 14px 'Azeret Mono',monospace;color:var(--pri)}
h2{font:900 clamp(1.4rem,4vw,2rem)/1.2 'Azeret Mono',monospace;letter-spacing:-.02em}
h3{font:600 1.05rem 'Azeret Mono',monospace;color:var(--acc);margin:30px 0 10px}
.sec p{margin-bottom:14px;color:#cbd5e1}.sec strong{color:#fff;font-weight:600}.sec em{color:var(--mut)}
a{color:var(--acc);text-underline-offset:3px}
code{font:13px 'JetBrains Mono',monospace;background:var(--sub);padding:2px 6px;border-radius:4px}
.sec ul,.sec ol{margin:0 0 16px;padding:0;list-style:none}
.sec ul>li{position:relative;padding:6px 0 6px 22px;color:#cbd5e1}
.sec ul>li::before{content:'//';position:absolute;left:0;color:var(--pri);font:600 12px 'Azeret Mono',monospace;top:9px}
.sec ol{counter-reset:n}.sec ol>li{counter-increment:n;position:relative;padding:12px 14px 12px 54px;margin-bottom:8px;background:rgba(15,27,46,.75);border:1px solid var(--line);border-radius:6px;color:#cbd5e1}
.sec ol>li::before{content:counter(n,decimal-leading-zero);position:absolute;left:14px;top:12px;font:600 14px 'Azeret Mono',monospace;color:var(--pri)}
.sec ul>li.chk{padding:12px 14px 12px 50px;margin-bottom:8px;background:rgba(15,27,46,.75);border:1px solid var(--line);border-radius:6px;cursor:pointer}
.sec ul>li.chk::before{content:none}
.box{position:absolute;left:14px;top:15px;width:20px;height:20px;border:2px solid var(--pri);border-radius:4px;transition:.2s}
.chk.done{opacity:.55}.chk.done .box{background:var(--pri);box-shadow:inset 0 0 0 3px var(--deep)}
.tw{overflow-x:auto;margin:18px 0 22px;border:1px solid var(--line);border-radius:8px;background:rgba(15,27,46,.7)}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:520px}
th{font:600 12px 'Azeret Mono',monospace;text-transform:uppercase;letter-spacing:.08em;color:var(--acc);text-align:left;background:var(--sub)}
th,td{padding:11px 14px;border-bottom:1px solid rgba(59,130,246,.12);vertical-align:top}
tr:last-child td{border-bottom:0}td{color:#cbd5e1}td:first-child{white-space:nowrap}
.close blockquote{font-size:1.15rem;border-left-width:4px}
.foot{padding:50px 20px 60px;color:var(--faint);font:12px 'Azeret Mono',monospace;text-align:center}
@media(max-width:600px){.brand{display:none}.hero{padding-top:110px}td:first-child{white-space:normal}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.title::after{animation:none}}
@media print{canvas,.navbar{display:none}body{background:#fff;color:#000}.sec p,.sec ul>li,td{color:#000}}

/* Fondo de ondas: copiado del sitio original (components.css §11 + responsive.css) */
#bg-wave,#bg-wave-tl{position:fixed;width:45vw;height:45vh;z-index:0;pointer-events:none;opacity:.5}
#bg-wave{bottom:0;right:0;mask-image:radial-gradient(ellipse 100% 100% at bottom right,#000 0%,rgba(0,0,0,.85) 40%,rgba(0,0,0,.4) 65%,rgba(0,0,0,0) 100%);-webkit-mask-image:radial-gradient(ellipse 100% 100% at bottom right,#000 0%,rgba(0,0,0,.85) 40%,rgba(0,0,0,.4) 65%,rgba(0,0,0,0) 100%)}
#bg-wave-tl{top:0;left:0;mask-image:radial-gradient(ellipse 100% 100% at top left,#000 0%,rgba(0,0,0,.85) 40%,rgba(0,0,0,.4) 65%,rgba(0,0,0,0) 100%);-webkit-mask-image:radial-gradient(ellipse 100% 100% at top left,#000 0%,rgba(0,0,0,.85) 40%,rgba(0,0,0,.4) 65%,rgba(0,0,0,0) 100%)}
@media screen and (max-width:768px){
#bg-wave,#bg-wave-tl{width:130vw!important;height:20vh!important;opacity:.2!important}}

/* ===== Componentes didácticos ===== */
.key,.warn{margin:20px 0;padding:14px 18px;border-radius:8px;background:rgba(59,130,246,.08);border:1px solid var(--line);border-left:3px solid var(--pri)}
.tag{display:block;margin-bottom:6px;font:600 11px 'Azeret Mono',monospace;text-transform:uppercase;letter-spacing:.1em;color:var(--acc)}
.key p,.warn p{margin:0 0 8px;color:#cbd5e1}.key p:last-child,.warn p:last-child{margin-bottom:0}
.warn{background:rgba(245,158,11,.08);border-color:rgba(245,158,11,.35);border-left-color:#F59E0B}.warn .tag{color:#FBBF24}
.hero .key{margin:26px 0 0}

.cards{display:grid;gap:12px;margin:18px 0 22px}
.c2{grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr))}
.c3{grid-template-columns:repeat(auto-fit,minmax(min(250px,100%),1fr))}
.card{padding:16px 16px 10px;background:rgba(15,27,46,.75);border:1px solid var(--line);border-top:2px solid var(--pri);border-radius:8px;font-size:14.5px;line-height:1.55}
.card h3{margin:0 0 10px;font-size:.98rem}
.card p{margin-bottom:10px}
.sec .card ul>li{padding:5px 0 5px 20px}.sec .card ul>li::before{top:8px}

.pairs{display:grid;gap:8px;margin:16px 0}
.pair{display:flex;gap:16px;padding:10px 14px;background:rgba(15,27,46,.75);border:1px solid var(--line);border-radius:6px;font-size:14px;line-height:1.5}
.pair b{flex:0 0 34%;color:#fff;font-weight:600}.pair span{color:#cbd5e1}
.pairs.grid{grid-template-columns:repeat(auto-fit,minmax(min(250px,100%),1fr))}
.pairs.grid .pair{flex-direction:column;gap:3px}.pairs.grid .pair b{flex:none;color:var(--acc)}

.timeline{margin:18px 0 22px;border-left:2px solid var(--line)}
.tl{position:relative;display:grid;grid-template-columns:54px 1fr;gap:12px;padding:9px 0 9px 18px;font-size:14px;line-height:1.5}
.tl::before{content:'';position:absolute;left:-6px;top:15px;width:10px;height:10px;border-radius:50%;background:var(--pri);box-shadow:0 0 0 3px var(--bg)}
.yr{font:600 13px 'Azeret Mono',monospace;color:var(--pri);padding-top:1px}
.tl b{display:block;color:#fff;font-weight:600}.tl span:not(.yr){color:#cbd5e1}

details.fold{margin:12px 0;border:1px solid var(--line);border-radius:8px;background:rgba(15,27,46,.7)}
details.fold summary{display:flex;justify-content:space-between;gap:12px;padding:13px 16px;cursor:pointer;list-style:none;font:600 .92rem 'Azeret Mono',monospace;color:var(--acc)}
details.fold summary::-webkit-details-marker{display:none}
details.fold summary::after{content:'+';color:var(--pri);font-size:1.2rem;line-height:1}
details.fold[open] summary::after{content:'\2212'}
details.fold summary:hover{color:#fff}
.fold-body{padding:0 14px 14px}.fold-body .pairs{margin:4px 0 12px}.fold-body p{font-size:14px;margin-bottom:6px}
.fold-body ul{margin:0}

.steps ol{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(380px,100%),1fr));gap:8px;margin:0}
.steps ol>li{margin:0;font-size:14.5px}

.prog{margin:0 0 16px;font:600 12px 'Azeret Mono',monospace;color:var(--mut)}
.prog i{display:block;height:6px;margin-top:6px;border-radius:99px;background:var(--sub);overflow:hidden}
.prog i b{display:block;height:100%;width:0;background:var(--pri);transition:width .3s}
.sec h3+ul>li.chk:first-child,.sec h3+ul{margin-top:0}

@media(max-width:600px){.pair{flex-direction:column;gap:3px}.pair b{flex:none}.tl{grid-template-columns:44px 1fr;gap:8px}}
@media print{details.fold:not([open])>.fold-body{display:block}.key,.warn,.card,.pair,details.fold{background:#fff;border-color:#999}.tag,.yr,.tl b,.pair b,.card h3{color:#000}.key p,.warn p,.tl span,.pair span{color:#000}}

/* ===== Versión interactiva (v2) ===== */
[hidden]{display:none!important}

/* Quiz personal vs. sensible */
.quiz{margin:20px 0 24px;padding:18px;border-radius:10px;background:rgba(15,27,46,.8);border:1px solid var(--line)}
.quiz-title{font:600 13px 'Azeret Mono',monospace;color:var(--acc);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}
.qi{padding:12px 0;border-top:1px solid rgba(59,130,246,.12)}
.qi:first-of-type{border-top:0}
.qt{color:#fff;font-weight:600;margin-bottom:8px}
.qb{display:flex;gap:8px;flex-wrap:wrap}
.qb button{font:600 13px 'Inter',sans-serif;padding:7px 14px;border-radius:999px;border:1px solid var(--pri);background:transparent;color:var(--acc);cursor:pointer;transition:.2s}
.qb button:hover:not(:disabled){background:var(--pri);color:#fff}
.qb button:disabled{cursor:default;opacity:.5}
.qb button.pick{opacity:1}
.qi.ok .qb button.pick{background:#059669;border-color:#059669;color:#fff}
.qi.no .qb button.pick{background:#B45309;border-color:#B45309;color:#fff}
.qw{margin-top:8px;font-size:14px;color:#cbd5e1}
.qw b{color:#fff}
.quiz-score{margin-top:10px;font:600 14px 'Azeret Mono',monospace;color:var(--acc)}

/* Tabs de la sección 3 */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:18px 0 0}
.tabs button{font:600 13px 'Azeret Mono',monospace;padding:9px 14px;border-radius:8px 8px 0 0;border:1px solid var(--line);border-bottom:0;background:var(--sub);color:var(--mut);cursor:pointer}
.tabs button:hover{color:#fff}
.tabs button.on{background:var(--card);color:#fff;border-top:2px solid var(--pri)}
.cards.tabs-src{grid-template-columns:1fr;margin-top:0;border-top-left-radius:0}
.cards.tabs-src .card{border-top:0;border-radius:0 8px 8px 8px;background:var(--card)}
.cards.tabs-src .card[hidden]{display:none!important}

/* Línea de tiempo: botón de expandir */
.more{font:600 13px 'Azeret Mono',monospace;margin:-8px 0 20px;padding:9px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--acc);cursor:pointer}
.more:hover{border-color:var(--pri);color:#fff}

/* Buscador de herramientas */
.finder{margin:6px 0 18px}
.finder label{display:block;font:600 12px 'Azeret Mono',monospace;color:var(--mut);margin-bottom:6px;text-transform:uppercase;letter-spacing:.06em}
.finder input{width:100%;padding:12px 14px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--txt);font:15px 'Inter',sans-serif}
.finder input:focus{outline:2px solid var(--pri);outline-offset:1px}
.finder-msg{margin-top:6px;font-size:13px;color:var(--mut);min-height:1em}

/* Pasos de "Si ya te filtraron" */
.stepper{margin:10px 0 18px}
.dots{display:flex;gap:6px;margin-bottom:12px}
.dot{flex:1;height:6px;border-radius:99px;background:var(--sub)}
.dot.on{background:var(--pri)}
.stepper-ol{display:block!important;margin:0!important}
.stepper-ol>li{font-size:16px;padding:20px 20px 20px 62px!important;min-height:120px}
.stepper-ol>li::before{left:18px!important;top:18px!important;font-size:18px!important}
.snav{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px}
.snav button{font:600 14px 'Azeret Mono',monospace;padding:10px 16px;border-radius:8px;border:1px solid var(--pri);background:var(--pri);color:#fff;cursor:pointer}
.snav button.prev{background:transparent;color:var(--acc)}
.snav button:disabled{opacity:.35;cursor:default}
.snav .cnt{font:600 13px 'Azeret Mono',monospace;color:var(--mut)}

/* Checklist: estado guardado */
.sec ul>li.chk{transition:.2s}
.sec ul>li.chk:hover{border-color:var(--pri)}
.chk.done strong{text-decoration:line-through;text-decoration-color:var(--faint)}

/* Bloque "En corto" más visible */
.key .tag{color:#93C5FD}

.stepper-ol>li::before{content:attr(data-n)!important}

.qb button.right{border-color:#059669;color:#34D399;opacity:1}