/* Libros del Revés · capa visual optimizada */
:root{
  --night:#0e171c;--night-2:#14252d;--night-3:#070b0f;
  --paper:#f2e4ca;--paper-soft:#d7c29f;--muted:rgba(242,228,202,.72);--quiet:rgba(242,228,202,.48);
  --sand:#c58b5b;--sand-light:#e1bb77;--rust:#b8563f;--blue:#263f4d;--line:rgba(242,228,202,.18);
  --glass:rgba(12,21,26,.76);--shadow:0 28px 92px rgba(0,0,0,.46);--radius-xl:34px;--radius-lg:24px;--radius-md:16px;
}
*{box-sizing:border-box}html{background:var(--night-3)}
body{
  font-family:Inter,"Helvetica Neue",Arial,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif!important;
  color:var(--paper)!important;
  background:
    radial-gradient(circle at 16% 12%,rgba(184,86,63,.24),transparent 24rem),
    radial-gradient(circle at 82% 0%,rgba(225,187,119,.15),transparent 28rem),
    linear-gradient(180deg,#14262d 0%,#0f1a20 42%,#080c10 100%)!important;
  text-rendering:optimizeLegibility;
}
body::before{opacity:.075!important;background-size:5px 5px!important}
body::after{content:"";position:fixed;inset:auto -18vw 12vh -18vw;height:1px;background:linear-gradient(90deg,transparent,rgba(225,187,119,.32),rgba(184,86,63,.38),transparent);box-shadow:0 0 42px rgba(184,86,63,.28);transform:rotate(-2.2deg);pointer-events:none;z-index:0}.nav{background:rgba(10,18,23,.72)!important;backdrop-filter:blur(18px) saturate(1.15)!important;border-bottom:1px solid rgba(242,228,202,.10);padding:.78rem clamp(1rem,3.6vw,3rem)!important}.brand{gap:.7rem!important}.brand-mark{background:linear-gradient(135deg,rgba(242,228,202,.08),rgba(225,187,119,.08))!important;border-color:rgba(225,187,119,.28)!important;box-shadow:0 0 26px rgba(184,86,63,.18)!important}.nav-links{gap:clamp(.55rem,1.3vw,1.15rem)!important}.nav-links a{border-radius:999px;padding:.42rem .64rem!important;transition:background .2s ease,color .2s ease,transform .2s ease}.nav-links a:hover,.nav-links a.active{background:rgba(242,228,202,.08);color:var(--paper)!important;transform:translateY(-1px)}
h1,h2,h3{letter-spacing:-.055em!important}.hero{position:relative;isolation:isolate}.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(255,255,255,.03),transparent 44%),radial-gradient(ellipse at center bottom,rgba(225,187,119,.07),transparent 55%);pointer-events:none}.hero-copy,.lead,.subtitle{color:var(--muted)!important}.eyebrow{color:var(--sand-light)!important;letter-spacing:.18em!important}.btn,button.btn,a.btn{border:1px solid rgba(242,228,202,.22)!important;background:rgba(242,228,202,.075)!important;color:var(--paper)!important;border-radius:999px!important;box-shadow:0 10px 34px rgba(0,0,0,.16);transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease!important}.btn:hover,button.btn:hover,a.btn:hover{transform:translateY(-2px);background:rgba(225,187,119,.12)!important;border-color:rgba(225,187,119,.52)!important;box-shadow:0 18px 42px rgba(0,0,0,.22)}.btn.primary,button.btn.primary,a.btn.primary{background:linear-gradient(135deg,rgba(184,86,63,.95),rgba(197,139,91,.92))!important;border-color:transparent!important;color:#fff6e8!important}.btn.ghost{background:transparent!important}
/* Home */.cover-stage{filter:drop-shadow(0 34px 70px rgba(0,0,0,.38))}.cover,.fake-cover,.rail-card,.editorial-block,.search-panel,.controls,.detail,.panel,.card,.modal-card,.book-card,.author-row,.authors-list,.sidebar,.cart-drawer,.modal,.catalogue-toolbar{background:linear-gradient(145deg,rgba(242,228,202,.105),rgba(242,228,202,.045))!important;border:1px solid rgba(242,228,202,.14)!important;box-shadow:var(--shadow)}.rail-card{min-height:0!important;padding:1.25rem!important;border-radius:24px!important;overflow:hidden;position:relative}.rail-card::after{content:"";position:absolute;inset:auto 1rem 1rem 1rem;height:1px;background:linear-gradient(90deg,rgba(225,187,119,.65),transparent);opacity:.55}.rail-card:hover{transform:translateY(-5px)!important;background:linear-gradient(145deg,rgba(242,228,202,.15),rgba(242,228,202,.055))!important}.home-rail{padding-bottom:clamp(3rem,7vw,5rem)!important}.rail-card strong{color:var(--paper)!important}.rail-card p{color:var(--muted)!important;line-height:1.48!important}
/* Editoriales */.editorial-block{border-radius:30px!important;padding:clamp(1.2rem,3vw,2.2rem)!important;overflow:hidden}.editorial-block:nth-child(even){background:linear-gradient(145deg,rgba(38,63,77,.38),rgba(242,228,202,.045))!important}.editorial-block .number,.book-meta{color:var(--sand-light)!important}.tag{border:1px solid rgba(225,187,119,.26)!important;background:rgba(225,187,119,.075)!important;color:var(--paper)!important;border-radius:999px!important}.visual .cover,.visual .fake-cover{border-radius:20px!important;overflow:hidden}.visual img,.book-cover img,.modal-image img,.portrait-frame img,.author-thumb img,.book-portada{filter:saturate(.88) contrast(1.03);}
/* Catalogo publico */.catalogue-shell,.authors-shell{position:relative;z-index:1}.search-panel,.controls{border-radius:26px!important;padding:clamp(1rem,2vw,1.35rem)!important;position:sticky;top:74px;z-index:5;backdrop-filter:blur(16px)}.input,input,select,textarea{background:rgba(3,8,12,.45)!important;border:1px solid rgba(242,228,202,.16)!important;color:var(--paper)!important;border-radius:16px!important;outline:none!important}.input:focus,input:focus,select:focus,textarea:focus{border-color:rgba(225,187,119,.52)!important;box-shadow:0 0 0 4px rgba(225,187,119,.08)!important}.book-grid,.books-grid{gap:clamp(1rem,2vw,1.3rem)!important}.book-card{border-radius:24px!important;overflow:hidden;transition:transform .22s ease,border-color .22s ease,background .22s ease!important}.book-card:hover{transform:translateY(-5px);border-color:rgba(225,187,119,.38)!important;background:linear-gradient(145deg,rgba(242,228,202,.14),rgba(242,228,202,.055))!important}.book-title,.book-card h2,.book-card strong{letter-spacing:-.035em}.price,.precio-neto,.modal-precio-row.destacado .val{color:var(--sand-light)!important}.modal{background:rgba(5,10,14,.58)!important;backdrop-filter:blur(8px)}.modal-card{border-radius:28px!important}.close,.modal-close,.cart-close{background:rgba(242,228,202,.10)!important;color:var(--paper)!important;border:1px solid rgba(242,228,202,.15)!important}.facts{gap:.7rem!important}.fact{background:rgba(4,9,12,.32)!important;border:1px solid rgba(242,228,202,.11)!important;border-radius:18px!important}.related-grid{gap:.8rem!important}.availability-result.ok{background:rgba(90,146,111,.18)!important;border-color:rgba(118,190,145,.35)!important}.availability-result.warn{background:rgba(225,187,119,.15)!important;border-color:rgba(225,187,119,.36)!important}.availability-result.no{background:rgba(184,86,63,.16)!important;border-color:rgba(184,86,63,.36)!important}
/* Autores */.alphabet{gap:.32rem!important}.letter{border-radius:999px!important}.letter.active{background:linear-gradient(135deg,var(--rust),var(--sand))!important;color:white!important}.authors-list{border-radius:26px!important}.author-row{box-shadow:none!important;border-radius:18px!important;background:rgba(242,228,202,.045)!important}.author-row.active,.author-row:hover{background:rgba(225,187,119,.10)!important;border-color:rgba(225,187,119,.32)!important}.portrait-frame,.portrait-placeholder{border-radius:26px!important;background:rgba(242,228,202,.06)!important;border:1px solid rgba(242,228,202,.14)!important}.author-thumb{border-radius:16px!important;overflow:hidden;background:rgba(242,228,202,.08)!important}.detail-section{border-top:1px solid rgba(242,228,202,.10)!important}
/* Contacto y bibliotecas */.choice{gap:1rem!important}.card,.panel{border-radius:26px!important}.image{border-radius:34px!important;box-shadow:var(--shadow)!important;border:1px solid rgba(242,228,202,.14)!important;overflow:hidden}.small-note{color:var(--quiet)!important}.footer{border-top:1px solid rgba(242,228,202,.12)!important;background:rgba(7,11,15,.58)!important;color:var(--quiet)!important}.footer a:hover{color:var(--paper)!important}
/* Librerías */.tabs,.catalogo-header,.cart-foot{border-color:rgba(242,228,202,.12)!important}.tab-btn{border-radius:999px!important}.tab-btn.active{background:linear-gradient(135deg,var(--rust),var(--sand))!important;color:white!important}.cart-float{background:linear-gradient(135deg,var(--rust),var(--sand))!important;border:0!important;color:white!important;box-shadow:0 22px 58px rgba(0,0,0,.36)!important}.badge-novedad,.badge-reposicion,.badge-consignacion,.descuento-badge{border-radius:999px!important}
@media (max-width:860px){.nav{position:sticky!important;top:0}.nav-links{overflow-x:auto;max-width:62vw;white-space:nowrap;padding-bottom:.15rem}.hero{min-height:auto!important;padding-top:4rem!important}.hero-grid,.layout{grid-template-columns:1fr!important}.search-panel,.controls{position:relative;top:0}.book-grid,.books-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))!important}.editorial-block{grid-template-columns:1fr!important}.visual{min-height:260px}.authors-shell .layout{display:block}.authors-list{max-height:none!important;margin-bottom:1rem}.detail{position:relative!important;top:0!important}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}