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/* Innova eBook v1.3 — refinamientos visuales y carga de imágenes */
.site-header{position:sticky;top:0;z-index:20;backdrop-filter:blur(16px);box-shadow:0 5px 24px #102d3208}
.brand-icon{box-shadow:0 8px 18px #102d3220}
.nav-cta{box-shadow:0 8px 18px #102d3215;transition:transform .18s,box-shadow .18s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 24px #102d3224}
.form-section{box-shadow:0 10px 35px #102d3206;transition:box-shadow .2s,border-color .2s}
.form-section:focus-within{border-color:#c8d9c5;box-shadow:0 14px 38px #102d320b}
input[type=file]{padding:11px;background:#f5f8f1;border-style:dashed;cursor:pointer}
input[type=file]::file-selector-button{border:0;border-radius:8px;padding:9px 12px;margin-right:12px;background:#dcebd2;color:#244d36;font:700 12px 'DM Sans';cursor:pointer}
.chapter-image-field{margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.chapter-illustration{margin:28px 0 8px}
.chapter-illustration img{display:block;width:100%;max-height:540px;object-fit:contain;background:#f5f7f1;border-radius:16px;border:1px solid var(--line)}
.chapter-illustration figcaption{font-size:11px;color:var(--muted);margin-top:8px;text-align:center}
.reader-cover{position:relative}
.reader-cover:after{content:'INNOVA eBOOK';position:absolute;right:28px;top:25px;font-size:10px;letter-spacing:.17em;font-weight:800;color:#ffffffbd}
.success-banner{box-shadow:0 8px 24px #285b360d}
.btn:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #a5ce88;outline-offset:3px}
@media(max-width:760px){.site-header{position:relative}.reader-cover:after{right:18px;top:17px;font-size:9px}}