/* Testemario. Papel cálido y tinta carbón, en los grises del logotipo. El color solo entra con los libros:
   cada colección pone el suyo en portadas, etiquetas y puntos. Reglas: filetes antes que sombras, radios
   pequeños, tarjetas planas sin anidar, sin vidrio ni degradados, etiquetas en versalitas solo si son cortas. */
:root{
  --paper:#F7F5F0; --sheet:#EFECE5; --ink:#2A2928; --ink-2:#55534F; --ink-3:#66645F; --line:#DCD7CD;
  --mark:#2A2928; --mark-ink:#F7F5F0; --focus:#1F4E9C; --ok:#1E7A46; --bad:#B42318; --card:#FCFBF8;
  --display:'Archivo','Arial Narrow',Arial,sans-serif; --title:'Anton','Archivo','Arial Narrow',sans-serif; --body:'Source Sans 3','Segoe UI',Arial,sans-serif; --mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  --r:4px; --maxw:1180px;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--paper:#161514;--sheet:#1F1E1C;--ink:#ECEAE6;--ink-2:#BDB9B2;--ink-3:#8F8C86;--line:#34322F;--mark:#ECEAE6;--mark-ink:#161514;--focus:#8FB4FF;--ok:#4CC383;--bad:#FF7B6E;--card:#1F1E1C;color-scheme:dark}}
:root[data-theme="dark"]{--paper:#161514;--sheet:#1F1E1C;--ink:#ECEAE6;--ink-2:#BDB9B2;--ink-3:#8F8C86;--line:#34322F;--mark:#ECEAE6;--mark-ink:#161514;--focus:#8FB4FF;--ok:#4CC383;--bad:#FF7B6E;--card:#1F1E1C;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.55 var(--body)}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4{font-family:var(--display);font-weight:800;letter-spacing:-.015em;line-height:1.08;margin:0;text-wrap:balance}
h1{font-size:clamp(2.1rem,4.6vw,3.6rem);font-stretch:92%}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
h3{font-size:1.15rem}
p{margin:0}
.in{max-width:var(--maxw);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.narrow{max-width:760px}
.mono{font-family:var(--mono);font-size:.78rem;letter-spacing:.02em;color:var(--ink-2)}
.small{font-size:.88rem;color:var(--ink-2)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.eyebrow{font-family:var(--display);font-weight:700;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2);display:flex;align-items:center;gap:.5rem}
.lead{font-size:1.18rem;line-height:1.5;color:var(--ink-2);max-width:62ch}
.dot{width:.7em;height:.7em;border-radius:50%;background:var(--c,var(--mark));display:inline-block;flex:none}
.mk{color:var(--mark-ink);background:linear-gradient(100deg,transparent .3em,var(--mark) .3em,var(--mark) calc(100% - .2em),transparent calc(100% - .2em));padding:0 .28em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
/* botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font:700 1rem/1 var(--display);letter-spacing:.01em;padding:.85rem 1.25rem;border-radius:999px;border:2px solid var(--ink);background:var(--ink);color:var(--paper);text-decoration:none;cursor:pointer;transition:transform .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn.sm{padding:.55rem .95rem;font-size:.9rem}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.amz{background:var(--mark);border-color:var(--mark);color:var(--mark-ink);font-size:1.08rem;padding:1rem 1.5rem}
/* cabecera */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--paper);border-bottom:1px solid var(--line)}
.top .in{display:flex;align-items:center;gap:1.5rem;min-height:64px}
.brand{color:var(--ink);display:inline-flex}
.wm{height:28px;width:auto}
.wm-d{display:none}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .wm-l{display:none}:root:not([data-theme="light"]) .wm-d{display:block}}
:root[data-theme="dark"] .wm-l{display:none}:root[data-theme="dark"] .wm-d{display:block}
.mainnav a{text-decoration:none;color:var(--ink-2)}
.mainnav a:hover{color:var(--ink)}

/* hero */
.hero{background:var(--sheet);border-bottom:1px solid var(--line)}
.hero-in{display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:center;padding-block:3.2rem 3.6rem}
.hero-copy{display:flex;flex-direction:column;gap:1.25rem;min-width:0}
.hero h1{font-size:clamp(2.4rem,5.4vw,4.4rem);line-height:1.02}
.finder{display:flex;flex-direction:column;gap:.5rem;max-width:560px}
.finder label{font-weight:700}
.finder-row{display:flex;gap:.5rem}
.finder input,.nl input,.nl select,.t-bar select,.err input,.err select,.err textarea{font:inherit;color:var(--ink);background:var(--card);border:2px solid var(--line);border-radius:999px;padding:.75rem 1.1rem;min-width:0}
.finder input{flex:1}
.err textarea{border-radius:var(--r)}
.finder-msg,.nl-msg{font-size:.92rem;color:var(--ink-2)}
.facts{list-style:none;display:flex;gap:1.6rem;padding:0;margin:.4rem 0 0;flex-wrap:wrap}
.facts li{font-size:.95rem;color:var(--ink-2)}
.facts b{display:block;font:900 1.9rem/1 var(--display);font-stretch:78%;color:var(--ink)}
.hero-demo{display:flex;flex-direction:column;gap:.6rem;min-width:0}
.demo-note{font-size:.88rem;color:var(--ink-3);text-align:center}
@media (max-width:900px){.hero-in{grid-template-columns:1fr;gap:2rem;padding-block:2.2rem 2.6rem}}
/* tarjeta de pregunta */
.qw{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:1.2rem 1.25rem 1.1rem;}
.qw-h{display:flex;justify-content:space-between;align-items:center}
.rev{display:inline-flex;gap:4px}.rev i{width:11px;height:11px;border:1.5px solid var(--ink-3);display:block;border-radius:2px}
.rev.big i{width:22px;height:22px;border-width:2.5px;border-color:var(--ink)}
.qw-q{font-weight:650;font-size:1.06rem;line-height:1.35;margin-top:.6rem}
.qw-o{list-style:none;padding:0;margin:.8rem 0 0;display:flex;flex-direction:column;gap:.35rem}
.opt{width:100%;display:flex;align-items:center;gap:.7rem;text-align:left;font:inherit;font-size:.98rem;color:var(--ink);background:transparent;border:1px solid transparent;border-radius:10px;padding:.45rem .55rem;cursor:pointer}
.opt:hover{background:var(--sheet)}
.bub{width:26px;height:26px;flex:none;border-radius:50%;border:2px solid var(--ink-3);display:flex;align-items:center;justify-content:center;font:700 .78rem/1 var(--display);color:var(--ink-2);text-transform:lowercase}
.opt.is-ok .bub{background:var(--mark);border-color:var(--mark);color:var(--mark-ink)}
.opt.is-ok{border-color:var(--mark)}
.opt.is-bad .bub{background:var(--ink);border-color:var(--ink);color:var(--paper);text-decoration:line-through}
.qw-s{margin-top:.8rem;padding-top:.7rem;border-top:1px dashed var(--line);font-size:.93rem;color:var(--ink-2)}
/* bandas y secciones */
section{padding-block:3rem}
.band{background:var(--sheet);border-block:1px solid var(--line)}
.sec-h{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:1.4rem}
.sec-h p{color:var(--ink-2);max-width:60ch}
.sec-h h2{display:flex;align-items:center;gap:.6rem}
.more{font-weight:700}
.tabs{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.4rem}
.tab{font:600 .92rem/1 var(--body);display:inline-flex;align-items:center;gap:.45rem;padding:.55rem .85rem;border-radius:999px;border:1.5px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer}
.tab::before{content:'';width:.6rem;height:.6rem;border-radius:50%;background:var(--c,var(--ink-3))}
.tab small{font-family:var(--mono);font-size:.72rem;color:var(--ink-3)}
.tab.on{border-color:var(--ink);background:var(--ink);color:var(--paper)}
.tab.on small{color:inherit;opacity:1}
/* libros */
.grid.books{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:1.6rem 1.2rem}
.grid.books.four{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}
.book{min-width:0}
.bk-link{display:flex;flex-direction:column;gap:.65rem;text-decoration:none}
.book .cv{width:100%;aspect-ratio:210/297;object-fit:cover;border-radius:3px 6px 6px 3px;box-shadow:0 1px 0 rgba(0,0,0,.08),0 10px 22px -12px rgba(20,22,26,.45);transition:transform .2s ease,box-shadow .2s ease}
.bk-link:hover .cv{transform:translateY(-4px) rotate(-.6deg);box-shadow:0 18px 30px -14px rgba(20,22,26,.5)}
.bk-meta{display:flex;flex-direction:column;gap:.25rem;min-width:0}
.bk-meta b{font-family:var(--display);font-weight:750;font-size:1rem;line-height:1.2}
.pill{align-self:flex-start;font:700 .68rem/1 var(--display);letter-spacing:.1em;text-transform:uppercase;padding:.3rem .5rem;border-radius:4px;background:color-mix(in srgb,var(--c) 14%,var(--card));border-left:3px solid var(--c);color:var(--ink)}
.book[hidden]{display:none}
/* método */
.m-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.m-item{display:flex;flex-direction:column;gap:.6rem;padding-top:1rem;border-top:3px solid var(--ink);min-width:0}
.m-item p{color:var(--ink-2);font-size:.98rem}
.m-k{font:900 1.6rem/1 var(--display);font-stretch:78%;min-height:28px;display:flex;align-items:center}
@media (max-width:900px){.m-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.m-grid{grid-template-columns:1fr}}
/* por dentro */
.inside-in{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.pages{position:relative;margin:0;min-height:420px}
.pages img{position:absolute;width:62%;border-radius:2px;box-shadow:0 20px 40px -20px rgba(0,0,0,.45);background:#fff}
.pages img:first-child{left:0;top:0;transform:rotate(-2.5deg)}
.pages img:last-child{right:0;top:12%;transform:rotate(2.5deg)}
.inside-copy{display:flex;flex-direction:column;gap:1rem;min-width:0}
.inside-copy p{color:var(--ink-2)}
@media (max-width:900px){.inside-in{grid-template-columns:1fr}.pages{min-height:0;aspect-ratio:1.25/1}}
.spec{width:100%;border-collapse:collapse;font-size:.96rem}
.spec th{text-align:left;font-weight:600;color:var(--ink-2);padding:.55rem 1rem .55rem 0;border-bottom:1px solid var(--line);width:38%;vertical-align:top}
.spec td{padding:.55rem 0;border-bottom:1px solid var(--line)}
/* newsletter */
.news{background:var(--ink);color:var(--paper)}
.news-in{display:grid;grid-template-columns:1fr 1.2fr;gap:2rem;align-items:center}
.news p{opacity:.8;margin-top:.5rem}
.nl{display:flex;gap:.5rem;flex-wrap:wrap}
.news-in>*{min-width:0}
.nl input{flex:1 1 220px}.nl select{flex:1 1 180px;width:100%;max-width:100%;text-overflow:ellipsis}
.news .btn{background:var(--mark);border-color:var(--mark);color:var(--mark-ink)}
.news .nl-msg{flex-basis:100%;color:var(--paper);opacity:.85}
@media (max-width:860px){.news-in{grid-template-columns:1fr}}
/* faq */
.faq h2{margin-bottom:1rem}
details{border-bottom:1px solid var(--line);padding:.9rem 0}
summary{cursor:pointer;font-weight:700;font-size:1.05rem}
details p{margin-top:.5rem;color:var(--ink-2)}
/* páginas internas */
.page-h{padding-block:2.6rem 1rem;display:flex;flex-direction:column;gap:1rem}
.crumbs{display:flex;gap:.5rem;flex-wrap:wrap;font-size:.88rem;color:var(--ink-3);padding-top:1.2rem}
.crumbs a{color:var(--ink-2)}
.colsec{padding-block:2rem;border-top:1px solid var(--line)}
.tbl-h{margin:2rem 0 1rem}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);margin-bottom:3rem}
.tbl{width:100%;border-collapse:collapse;font-size:.92rem;min-width:640px}
.tbl th{text-align:left;font:700 .78rem/1.2 var(--display);letter-spacing:.06em;text-transform:uppercase;padding:.7rem .8rem;background:var(--sheet);border-bottom:1px solid var(--line)}
.tbl td{padding:.6rem .8rem;border-bottom:1px solid var(--line)}
.tbl td.n{text-align:right;font-variant-numeric:tabular-nums}
/* ficha de libro */
.pdp{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center;padding-block:1.5rem 2.5rem}
.pdp-media{background:var(--sheet);border-radius:16px;overflow:hidden}
.pdp-media .mock{width:100%}
.pdp-info{display:flex;flex-direction:column;gap:1rem;min-width:0}
.pdp-info h1{font-size:clamp(1.8rem,3.4vw,2.7rem)}
.pdp-info .sub{font-size:1.1rem;color:var(--ink-2)}
.buy{display:flex;align-items:center;gap:1.2rem;flex-wrap:wrap;margin-top:.4rem}
.price{font:900 2rem/1 var(--display);font-stretch:80%}
.price small{display:block;font:500 .78rem/1.3 var(--body);color:var(--ink-3)}
.ship{font-size:.88rem;color:var(--ink-3)}
.opo-link a{font-weight:700}
@media (max-width:900px){.pdp{grid-template-columns:1fr;gap:1.5rem}}
.pdp-body{display:grid;grid-template-columns:1.4fr 1fr;gap:3rem;padding-block:1rem 3rem}
.desc{min-width:0;max-width:68ch}
.desc h3{margin:1.6rem 0 .6rem}
.desc p{margin-bottom:.8rem}
.desc ul{padding-left:1.2rem;margin:0}
.desc li{margin-bottom:.35rem}
.side{display:flex;flex-direction:column;gap:1rem;min-width:0}
.page-shot{border:1px solid var(--line);border-radius:4px;background:#fff}
@media (max-width:900px){.pdp-body{grid-template-columns:1fr}}
/* oposiciones */
.kpis{display:flex;gap:2.5rem;flex-wrap:wrap;margin-top:.5rem}
.kpis div{display:flex;flex-direction:column;gap:.2rem;max-width:300px}
.kpis b{font:900 2.4rem/1 var(--display);font-stretch:78%}
.kpis span{font-size:.86rem;color:var(--ink-3)}
.callout{background:var(--sheet);border:1px solid var(--line);border-left:5px solid var(--mark);border-radius:var(--r);padding:1.1rem 1.3rem;display:flex;flex-direction:column;gap:.5rem;max-width:760px}
.opo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;padding-bottom:3rem}
.opo-g h2{font-size:1.3rem;display:flex;align-items:center;gap:.5rem;margin-bottom:.6rem}
.opo-l{list-style:none;margin:0;padding:0}
.opo-l a{display:flex;justify-content:space-between;gap:1rem;padding:.7rem 0;border-bottom:1px solid var(--line);text-decoration:none}
.opo-l a:hover b{text-decoration:underline}
/* test online */
.t-bar{display:flex;gap:.7rem;align-items:center;flex-wrap:wrap;background:var(--sheet);border:1px solid var(--line);border-radius:var(--r);padding:1rem}
.t-bar label{font-weight:700;font-size:.92rem}
.t-score{margin:1.2rem 0;min-height:1px}
.t-score .res{display:flex;gap:1.6rem;flex-wrap:wrap;background:var(--card);border:2px solid var(--ink);border-radius:var(--r);padding:1rem 1.2rem}
.t-score .res div{display:flex;flex-direction:column}
.t-score .res b{font:900 2rem/1 var(--display);font-stretch:78%}
.t-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.t-list li{min-width:0}
.t-list .qw{height:100%}
.t-list .qw-e{display:block;margin-top:.4rem;font-size:.9rem;color:var(--ink-2)}
.t-end{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;margin-top:1.2rem;padding-bottom:3rem}
@media (max-width:860px){.t-list{grid-template-columns:1fr}}
/* prosa */
.prose{padding-block:2.6rem 3.5rem;display:flex;flex-direction:column;gap:1rem}
.prose h2{font-size:1.35rem;margin-top:1rem}
.prose p{color:var(--ink-2);max-width:68ch}
.note{background:var(--sheet);border-left:4px solid var(--mark);padding:.8rem 1rem;border-radius:6px}
.err{display:flex;flex-direction:column;gap:.5rem;max-width:560px}
.err label{font-weight:700;margin-top:.4rem}
.err .btn{align-self:flex-start;margin-top:.6rem}
/* pie */
.foot{border-top:1px solid var(--line);margin-top:0;background:var(--sheet)}
.foot .in{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem;padding-block:2.6rem 1.6rem}
.fcol{display:flex;flex-direction:column;gap:.45rem;min-width:0}
.fcol p{font-size:.92rem;color:var(--ink-2);max-width:40ch}
.fcol h4,.fcol .fh{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:.3rem}
.fcol a{font-size:.94rem;color:var(--ink-2);text-decoration:none}
.fcol a:hover{color:var(--ink);text-decoration:underline}
.foot .legal{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-block:1rem 1.6rem;border-top:1px solid var(--line);font-size:.8rem;color:var(--ink-3);grid-template-columns:none}
@media (max-width:860px){.foot .in{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.foot .in{grid-template-columns:1fr}}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

/* v2: títulos grandes como en las portadas, sello de verificación y doble formato */
.hero h1{font-family:var(--title);font-weight:400;text-transform:uppercase;letter-spacing:.005em;line-height:1.04;font-stretch:normal}
.hero h1 .mk{padding:0}
.pdp-info h1{font-size:clamp(1.6rem,3vw,2.3rem)}
.verif{display:flex;align-items:center;gap:.6rem;margin-top:.9rem;font-weight:600;color:var(--ink);font-size:.95rem}
.verif svg{width:28px;height:28px;flex:none}
.btn.kdl{background:var(--paper);border:2px solid var(--ink);color:var(--ink);font-size:1.02rem;padding:.9rem 1.3rem}
.buy .fmt{display:flex;flex-direction:column;gap:.25rem}
.buy .fmt small{font-size:.78rem;color:var(--ink-3)}

/* Testemario: botones rectos, marcador del lema como subrayado de rotulador, contacto en el pie */
.btn{border-radius:var(--r)}
/* el lema en dos tonos, como el logotipo: «tes» oscuro, «temario» claro */
.mk{color:var(--ink-3);background:none;padding:0;box-shadow:none}
.foot .flema{font-family:var(--title);text-transform:uppercase;font-size:1.25rem;letter-spacing:.01em;color:var(--ink);margin:.6rem 0 .4rem}
.foot .contact,.foot .social{display:flex;flex-wrap:wrap;gap:.4rem 1rem;margin-top:.6rem;font-weight:600}
.foot .contact a,.foot .social a{color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line)}
.foot .contact a:hover,.foot .social a:hover{border-bottom-color:var(--ink)}

.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}