:root{--paper:#ffffff;--paper-ink:#1b2440}
.sp .s-hero{border-top:0}


.sp section{padding-block:64px;border-bottom:1px solid var(--line)}
.sec-head{display:grid;gap:12px;margin-bottom:32px}

/* hero */
.s-hero{padding-block:56px 64px}
.s-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.s-hero h1{font-size:clamp(2.4rem,6vw,4.4rem);font-weight:900;letter-spacing:-.02em;color:var(--ink)}
.s-hero h1 em{font-style:normal;color:var(--teal)}
.s-hero .lead{margin-top:18px}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.badge{font-family:var(--f-display);font-weight:600;font-size:.82rem;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink)}
.badge b{color:var(--teal)}
.isbn-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:24px;display:grid;gap:18px;min-width:0}
.isbn-card .lbl{font-family:var(--f-display);font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2)}
.barcode{background:#fff;border-radius:8px;padding:14px 14px 6px;display:flex;justify-content:center}
.barcode svg{width:100%;max-width:340px;height:auto}
.anatomy{display:flex;gap:6px;flex-wrap:wrap;font-family:var(--f-mono);font-size:1.15rem}
.seg{display:grid;gap:2px;text-align:center}
.seg b{padding:4px 8px;border-radius:6px;background:var(--green-soft);color:var(--ink);font-weight:600}
.seg.pub b{background:var(--green);color:var(--on-accent)}
.seg small{font-family:var(--f-display);font-size:.68rem;color:var(--ink-2);letter-spacing:.04em;line-height:1.2}
.dash{align-self:start;padding-top:4px;color:var(--ink-2)}
.isbn-card .reg{font-size:.92rem;color:var(--ink-2)}
.isbn-card .reg strong{color:var(--ink)}

/* qué publicamos */
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cols3 > div{display:grid;gap:8px;align-content:start;border-top:3px solid var(--green);padding-top:14px}
.cols3 p{color:var(--ink-2);font-size:.98rem}

/* metodología */
.method{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.facts{display:grid;gap:0;border:1px solid var(--line);border-radius:12px;background:var(--surface);overflow:hidden}
.fact{display:grid;grid-template-columns:92px 1fr;gap:16px;padding:16px 18px;border-bottom:1px solid var(--line);align-items:baseline}
.fact:last-child{border-bottom:0}
.fact .n{font-family:var(--f-head);font-weight:700;font-variant-numeric:tabular-nums lining-nums;font-size:1.6rem;color:var(--teal);line-height:1}
.fact p{font-size:.96rem;color:var(--ink-2)}
.fact p b{color:var(--ink);font-family:var(--f-display);font-weight:700}
.calc{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px;display:grid;gap:14px;min-width:0}
.calc h3{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:baseline}
.calc h3 small{font-family:var(--f-body);font-weight:400;font-size:.85rem;color:var(--ink-2)}
.crit{display:grid;grid-template-columns:1fr auto auto;gap:10px;align-items:center;font-size:.9rem;padding-block:4px;border-bottom:1px dashed var(--line)}
.crit .w{font-family:var(--f-mono);font-size:.8rem;color:var(--ink-2);width:3.2em;text-align:right}
.crit select{font-family:var(--f-mono);font-size:.9rem;padding:3px 6px;border-radius:6px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.total{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding-top:6px}
.total .score{font-family:var(--f-display);font-weight:900;font-size:2rem;font-variant-numeric:tabular-nums}
.vpill{font-family:var(--f-display);font-weight:700;font-size:.8rem;padding:5px 12px;border-radius:999px}
.vpill.ok{background:var(--green);color:var(--on-accent)}
.vpill.no{background:var(--line);color:var(--ink)}
.calc .hint{font-size:.82rem;color:var(--ink-2)}

/* proceso */
.phases{display:grid;gap:0;counter-reset:ph}
.phase{display:grid;grid-template-columns:200px 1fr;gap:28px;padding-block:26px;border-top:1px solid var(--line)}
.phase:first-child{border-top:0;padding-top:0}
.phase .ph-h{display:grid;gap:6px;align-content:start}
.phase .ph-n{font-family:var(--f-display);font-weight:900;font-size:.8rem;letter-spacing:.14em;color:var(--teal);text-transform:uppercase}
.phase .ph-who{font-size:.85rem;color:var(--ink-2)}
.phase .ph-day{font-family:var(--f-mono);font-size:.78rem;color:var(--ink-2);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:2px 8px;justify-self:start}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.steps li{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:baseline}
.steps li p{color:var(--ink-2);font-size:.98rem}
.steps li p b{color:var(--ink);font-weight:600}
.doc{font-family:var(--f-mono);font-size:.78rem;font-weight:600;color:var(--teal);background:var(--surface);border:1px solid var(--line);border-radius:5px;padding:1px 7px;white-space:nowrap;text-decoration:none;cursor:pointer}
.doc:hover{border-color:var(--green)}
.doc.off{color:var(--ink-2);cursor:default}
.ref{margin-top:22px;font-size:.88rem;color:var(--ink-2)}

/* formatos */
.formats{display:grid;grid-template-columns:300px 1fr;gap:28px;align-items:start}
.flist{display:grid;gap:18px;position:sticky;top:calc(env(safe-area-inset-top,0px) + 76px)}
.fgroup{display:grid;gap:4px}
.fgroup h4{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);font-weight:700;margin-bottom:2px}
.fbtn{all:unset;box-sizing:border-box;display:grid;grid-template-columns:48px 1fr;gap:8px;align-items:baseline;padding:8px 10px;border-radius:8px;cursor:pointer;font-size:.93rem;line-height:1.3;color:var(--ink)}
.fbtn .c{font-family:var(--f-mono);font-size:.78rem;color:var(--ink-2)}
.fbtn:hover{background:var(--surface)}
.fbtn[aria-selected="true"]{background:var(--surface);box-shadow:inset 3px 0 0 var(--green)}
.fbtn:focus-visible{outline:3px solid var(--green)}
.sheet-wrap{min-width:0;display:grid;gap:12px}
.sheet-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.sheet-bar .meta{font-size:.88rem;color:var(--ink-2)}
.sp .btn{font-family:var(--f-display);font-weight:700;font-size:.88rem;padding:9px 16px;border-radius:8px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);cursor:pointer}
.sp .btn.ghost{background:transparent;color:var(--ink)}
.sp .btn:hover{filter:brightness(1.1)}
.sheet{background:var(--paper);color:var(--paper-ink);border-radius:4px;box-shadow:0 1px 2px rgba(0,0,0,.08),0 12px 32px -12px rgba(31,46,75,.25);padding:clamp(22px,5vw,56px);font-family:var(--f-body);font-size:.95rem;line-height:1.65;display:grid;gap:14px;position:relative;overflow:hidden;min-height:560px;align-content:start}
.sheet::after{content:"";position:absolute;right:-60px;bottom:-60px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle at 30% 30%,#4fd1bd,#2a9a95);opacity:.85}
.sheet .lh{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:6px}
.sheet .lh img{height:52px;width:auto}
.sheet .lh .code{font-family:var(--f-mono);font-size:.72rem;color:#5a6684}
.sheet h3{color:#1d2a44;text-align:center;font-size:1rem;letter-spacing:.04em;text-transform:uppercase;margin-block:6px 4px}
.sheet .right{text-align:right}
.sheet .label{font-weight:600}
.sheet .note{font-size:.82rem;font-style:italic;color:#56607a}
.sheet .lines{display:grid;gap:0}
.sheet .ph{background:#e0f4f0;border-radius:3px;padding:0 3px;color:#11665c}
.sheet .tbl{overflow-x:auto}
.sheet table{border-collapse:collapse;width:100%;font-size:.88rem}
.sheet th,.sheet td{border:1px solid #9aa6bd;padding:5px 9px;text-align:left;vertical-align:top}
.sheet th{background:#eef2f8;font-family:var(--f-display);font-weight:700}
.sheet .signs{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;margin-top:34px;position:relative;z-index:1}
.sheet .sig{text-align:center;font-size:.85rem;min-width:200px;border-top:1px solid #1b2440;padding-top:6px;display:grid}
.sheet .foot{margin-top:auto;padding-top:18px;border-top:2px solid #4fd1bd;font-size:.75rem;color:#5a6684;position:relative;z-index:1;max-width:80%}
.toast{font-family:var(--f-display);font-size:.85rem;color:var(--teal);min-height:1.2em}

/* catálogo */
.book{display:grid;grid-template-columns:220px 1fr;gap:36px;align-items:start}
.cover{aspect-ratio:2/3;max-width:100%;border-radius:4px 10px 10px 4px;background:linear-gradient(160deg,#1f2e4b 0%,#26405f 55%,#2a9a95 140%);color:#fff;padding:20px 18px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 18px 40px -18px rgba(31,46,75,.6);position:relative;overflow:hidden}
.cover::before{content:"";position:absolute;left:10px;top:0;bottom:0;width:2px;background:rgba(255,255,255,.18)}
.cover .ct{font-family:var(--f-display);font-weight:900;font-size:1.35rem;line-height:1.05}
.cover .cs{font-family:var(--f-display);font-weight:600;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:#8fe8d9;margin-top:8px}
.cover .ca{font-size:.8rem}
.cover .wheel{width:70px;height:70px;border-radius:50%;border:6px dotted #4fd1bd;opacity:.9}
.bdata{display:grid;gap:14px;min-width:0}
.bdata dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 22px;margin:0;font-size:.95rem}
.bdata dt{font-family:var(--f-display);font-weight:600;color:var(--ink-2);font-size:.85rem}
.bdata dd{margin:0}

/* contacto */
.contact{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:start}
.mailbox{background:var(--navy);color:#fff;border-radius:14px;padding:28px;display:grid;gap:14px}
.mailbox .lbl{font-family:var(--f-display);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:#8fe8d9}
.mailbox .addr{font-family:var(--f-mono);font-size:clamp(1.05rem,2.6vw,1.45rem);font-weight:600;word-break:break-all;user-select:all;color:#fff}
.mailbox .row{display:flex;gap:10px;flex-wrap:wrap}
.mailbox .btn{background:#4fd1bd;border-color:#4fd1bd;color:var(--on-accent)}
.mailbox .btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.mailbox p{color:#d5def3;font-size:.95rem}
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.checklist li{display:grid;grid-template-columns:22px 1fr;gap:10px;font-size:.98rem;color:var(--ink-2)}
.checklist li::before{content:"";width:16px;height:16px;border:2px solid var(--green);border-radius:4px;margin-top:4px}
.fine{padding-block:28px 48px;font-size:.82rem;color:var(--ink-2);display:grid;gap:8px;max-width:80ch}

@media (max-width:860px){
  .s-hero-grid,.method,.formats,.contact,.book{grid-template-columns:1fr}
  .cols3{grid-template-columns:1fr}
  .phase{grid-template-columns:1fr;gap:12px}
  .flist{position:static;grid-template-columns:1fr 1fr}
  .book .cover{max-width:220px}
}
@media (max-width:520px){
  .flist{grid-template-columns:1fr}
  .bdata dl{grid-template-columns:1fr;gap:0 0}
  .bdata dd{margin-bottom:8px}
  .fact{grid-template-columns:64px 1fr}
}
.cover-img{width:100%;max-width:220px;border-radius:4px 10px 10px 4px;box-shadow:0 18px 40px -18px rgba(31,46,75,.6)}
.bdata > p{color:var(--ink-2)}

/* Estantería de libros */
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:28px}
.bookcard{display:grid;gap:6px;text-decoration:none;color:var(--ink);align-content:start}
.bookcard .cover,.bookcard .cover-img{aspect-ratio:2/3;width:100%;max-width:100%;transition:transform .2s ease,box-shadow .2s ease;object-fit:cover}
.bookcard:hover .cover,.bookcard:hover .cover-img{transform:translateY(-4px)}
.bk-t{font-family:var(--f-display);font-weight:700;line-height:1.25;margin-top:8px}
.bk-a{font-size:.88rem;color:var(--ink-2)}
.bk-i{font-size:.75rem;color:var(--teal)}
.btitle{font-size:clamp(1.6rem,3.4vw,2.3rem);font-weight:800}
.reader{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface);height:80vh;min-height:520px}
.reader iframe{width:100%;height:100%;border:0;display:block}
@media (prefers-reduced-motion:reduce){.bookcard .cover,.bookcard .cover-img{transition:none}}