:root{
  --bg:#06111f;
  --bg2:#0a1930;
  --panel:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.16);
  --text:#f7fbff;
  --muted:#a8b8ca;
  --cyan:#00e5ff;
  --green:#00f5a0;
  --gold:#ffc857;
  --purple:#8c5cff;
  --shadow:0 32px 90px rgba(0,0,0,.42);
  --font:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --display:"Space Grotesk",Inter,system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{min-height:100svh;font-family:var(--font);color:var(--text);background:radial-gradient(circle at 20% 10%,rgba(0,229,255,.12),transparent 30%),radial-gradient(circle at 85% 0%,rgba(0,245,160,.1),transparent 26%),linear-gradient(135deg,#06111f,#0a1930 65%,#050814);overflow-x:hidden;padding-bottom:0}
a{text-decoration:none;color:inherit}button{font:inherit}.noise{position:fixed;inset:0;pointer-events:none;z-index:-1;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(circle at center,black,transparent 82%)}.bg-orb{position:fixed;border-radius:50%;filter:blur(30px);opacity:.4;z-index:-2}.orb-a{width:360px;height:360px;background:var(--cyan);left:-120px;top:120px;animation:drift 12s ease-in-out infinite}.orb-b{width:440px;height:440px;background:var(--purple);right:-160px;bottom:40px;animation:drift 14s ease-in-out infinite reverse}@keyframes drift{50%{transform:translate(36px,-28px) scale(1.1)}}
.topbar{position:sticky;top:14px;z-index:60;width:min(1180px,calc(100% - 28px));margin:14px auto 0;height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 14px;border:1px solid var(--line);border-radius:100px;background:rgba(6,17,31,.72);backdrop-filter:blur(20px);box-shadow:0 18px 50px rgba(0,0,0,.22)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:52px;height:52px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(135deg,var(--cyan),#4b7cff);color:#04101e;font-family:var(--display);font-weight:900;font-size:1.18rem;letter-spacing:-.06em}.brand b{display:block;font-family:var(--display);font-size:.98rem}.brand small{display:block;color:var(--muted);font-weight:800;font-size:.7rem;line-height:1.1}.top-actions{display:flex;gap:8px;align-items:center}.ghost-btn,.primary-btn{border:1px solid var(--line);border-radius:100px;padding:11px 15px;font-weight:900;font-size:.82rem;cursor:pointer;background:rgba(255,255,255,.07);color:#fff;transition:.2s}.primary-btn{border:0;background:linear-gradient(135deg,var(--cyan),var(--green));color:#03131d}.ghost-btn:hover,.primary-btn:hover{transform:translateY(-2px)}
.app-shell{width:min(1180px,calc(100% - 32px));margin:34px auto 70px;display:grid;grid-template-columns:.78fr 1.22fr;gap:28px;align-items:start}.intro-panel{position:sticky;top:108px;border:1px solid var(--line);border-radius:34px;background:linear-gradient(160deg,rgba(255,255,255,.1),rgba(255,255,255,.04));box-shadow:var(--shadow);padding:34px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.12em;margin-bottom:14px}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor;box-shadow:0 0 16px currentColor}.intro-panel h1{font-family:var(--display);font-size:clamp(2rem,4vw,3.4rem);line-height:.96;letter-spacing:-.055em}.intro-panel p{color:#c3d3e7;margin-top:18px}.doc-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:24px}.doc-stats span{border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.06);padding:13px 10px;color:var(--muted);font-size:.76rem;font-weight:800;text-align:center}.doc-stats b{display:block;color:#fff;font-size:1rem;font-family:var(--display)}
.reader-card{border:1px solid rgba(0,229,255,.22);border-radius:38px;background:linear-gradient(160deg,rgba(255,255,255,.1),rgba(255,255,255,.04));box-shadow:var(--shadow);padding:18px;overflow:hidden}.reader-toolbar{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;margin-bottom:16px}.round-btn{width:50px;height:50px;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.08);color:#fff;font-size:2rem;line-height:1;cursor:pointer;transition:.2s}.round-btn:hover{background:var(--cyan);color:#03131d;transform:scale(1.05)}.progress-info{text-align:center}.progress-info strong{font-family:var(--display);font-size:.95rem}.track{height:8px;border-radius:100px;background:rgba(255,255,255,.1);overflow:hidden;margin-top:8px}.track i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--green));border-radius:100px;transition:width .35s}
.book-stage{position:relative;perspective:1800px;min-height:620px;display:grid;place-items:center;padding:20px 12px 30px;border-radius:30px;background:radial-gradient(circle at center,rgba(0,229,255,.12),transparent 62%),rgba(0,0,0,.12);overflow:hidden}.book-shadow{position:absolute;width:74%;height:40px;bottom:22px;border-radius:50%;background:rgba(0,0,0,.42);filter:blur(18px)}.book{position:relative;z-index:2;width:min(100%,800px);display:grid;grid-template-columns:1fr 1fr;gap:0;transform-style:preserve-3d}.paper{position:relative;aspect-ratio:1/1.414;background:#fff;overflow:hidden;box-shadow:0 22px 55px rgba(0,0,0,.28);display:grid;place-items:center}.left-page{border-radius:16px 0 0 16px;transform-origin:right center}.right-page{border-radius:0 16px 16px 0;transform-origin:left center}.paper img{width:100%;height:100%;object-fit:contain;background:#fff}.page-glow{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(0,0,0,.08),transparent 16%,transparent 84%,rgba(0,0,0,.12));z-index:1}.page-num{position:absolute;right:12px;bottom:9px;z-index:2;color:#111;background:rgba(255,255,255,.72);border:1px solid rgba(0,0,0,.08);border-radius:100px;padding:4px 9px;font-weight:900;font-size:.72rem}.left-page .page-num{right:auto;left:12px}.book.turn-next .right-page{animation:turnNext .48s ease both}.book.turn-prev .left-page{animation:turnPrev .48s ease both}@keyframes turnNext{50%{transform:rotateY(-18deg);filter:brightness(.86)}100%{transform:rotateY(0)}}@keyframes turnPrev{50%{transform:rotateY(18deg);filter:brightness(.86)}100%{transform:rotateY(0)}}
.mobile-hint{display:none;text-align:center;color:var(--muted);font-size:.82rem;font-weight:800;margin-top:12px}.reader-footer{display:flex;justify-content:space-between;gap:10px;margin-top:16px}.text-btn{border:1px solid var(--line);background:rgba(255,255,255,.06);color:#fff;border-radius:100px;padding:11px 15px;font-weight:900;cursor:pointer}.text-btn:hover{background:rgba(255,255,255,.12)}
.thumb-drawer{position:fixed;right:18px;top:100px;bottom:18px;width:min(380px,calc(100% - 36px));z-index:80;transform:translateX(calc(100% + 30px));transition:.28s ease;background:rgba(6,17,31,.92);border:1px solid var(--line);border-radius:28px;backdrop-filter:blur(20px);box-shadow:var(--shadow);padding:18px;overflow:auto}.thumb-drawer.open{transform:translateX(0)}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.drawer-head b{display:block;font-family:var(--display);font-size:1.15rem}.drawer-head span{color:var(--muted);font-size:.82rem}.drawer-head button,.zoom-close{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.08);color:#fff;font-size:1.45rem;cursor:pointer}.thumb-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.thumb{border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.06);padding:8px;cursor:pointer;color:#fff;text-align:left;transition:.2s}.thumb img{width:100%;aspect-ratio:1/1.414;object-fit:contain;background:#fff;border-radius:12px;display:block}.thumb span{display:block;font-weight:900;font-size:.76rem;margin-top:7px;color:var(--muted)}.thumb.active{border-color:var(--green);box-shadow:0 0 0 3px rgba(0,245,160,.12)}
.zoom-modal{position:fixed;inset:0;z-index:120;background:rgba(3,8,16,.92);display:none;place-items:center;padding:24px}.zoom-modal.open{display:grid}.zoom-modal img{max-width:min(96vw,1000px);max-height:92svh;object-fit:contain;background:#fff;border-radius:18px;box-shadow:var(--shadow)}.zoom-close{position:absolute;right:18px;top:18px}.dock{display:none}
@media(max-width:980px){.app-shell{grid-template-columns:1fr}.intro-panel{position:relative;top:auto}.top-actions .ghost-btn:nth-child(2){display:none}.book-stage{min-height:560px}.book{width:min(100%,720px)}}
@media(max-width:680px){body{padding-bottom:92px}.topbar{height:66px;top:8px;width:calc(100% - 18px);margin-top:8px}.brand small{display:none}.brand-mark{width:46px;height:46px;border-radius:16px}.top-actions{display:none}.app-shell{width:calc(100% - 20px);margin-top:20px;margin-bottom:34px;gap:18px}.intro-panel{padding:22px;border-radius:28px}.intro-panel h1{font-size:2.1rem}.doc-stats{grid-template-columns:1fr 1fr 1fr}.reader-card{padding:12px;border-radius:28px}.reader-toolbar{grid-template-columns:auto 1fr auto;gap:8px}.round-btn{width:44px;height:44px;font-size:1.6rem}.book-stage{min-height:0;padding:16px 8px 22px;border-radius:24px;touch-action:pan-y}.book{width:min(100%,420px);display:block}.paper{display:none;border-radius:16px}.paper.single{display:grid}.paper.single .page-num{left:auto;right:12px}.book.turn-next .paper.single{animation:mobileNext .36s ease both}.book.turn-prev .paper.single{animation:mobilePrev .36s ease both}@keyframes mobileNext{0%{transform:translateX(0);opacity:1}50%{transform:translateX(-18px) rotateY(-8deg);opacity:.55}100%{transform:translateX(0);opacity:1}}@keyframes mobilePrev{0%{transform:translateX(0);opacity:1}50%{transform:translateX(18px) rotateY(8deg);opacity:.55}100%{transform:translateX(0);opacity:1}}.mobile-hint{display:block}.reader-footer{display:none}.thumb-drawer{top:84px;right:10px;left:10px;bottom:92px;width:auto;border-radius:24px}.thumb-grid{grid-template-columns:repeat(3,1fr);gap:8px}.thumb{padding:6px;border-radius:14px}.thumb img{border-radius:9px}.thumb span{font-size:.65rem}.dock{position:fixed;left:10px;right:10px;bottom:10px;z-index:70;display:grid;grid-template-columns:repeat(4,1fr);gap:6px;padding:8px;border:1px solid var(--line);border-radius:22px;background:rgba(6,17,31,.9);backdrop-filter:blur(18px);box-shadow:0 16px 40px rgba(0,0,0,.3)}.dock button{border:0;border-radius:16px;padding:8px 4px;background:rgba(255,255,255,.06);color:#fff;display:flex;flex-direction:column;align-items:center;gap:3px;font-weight:900}.dock span{font-size:1.25rem;line-height:1}.dock small{font-size:.62rem;color:var(--muted)}}
@media(max-width:420px){.intro-panel h1{font-size:1.86rem}.intro-panel p{font-size:.93rem}.doc-stats span{font-size:.68rem;padding:10px 6px}.progress-info strong{font-size:.82rem}.reader-card{border-radius:24px}.book{width:100%}.thumb-grid{grid-template-columns:repeat(2,1fr)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}

/* ===== FIX V2 · Navegación móvil estable ===== */
.round-btn:disabled,.dock button:disabled{opacity:.38;cursor:not-allowed;filter:grayscale(.4)}
.round-btn:disabled:hover{background:rgba(255,255,255,.08);color:#fff;transform:none}
.dock button:disabled{background:rgba(255,255,255,.035)}
.book-stage{touch-action:pan-y pinch-zoom;overscroll-behavior:contain}
@media(max-width:680px){
  .dock button{touch-action:manipulation;-webkit-tap-highlight-color:transparent}
  .round-btn{touch-action:manipulation;-webkit-tap-highlight-color:transparent}
}