/* =========================================================
   POWEST — Catálogo Corporativo 2026 · Visor tipo revista
   ========================================================= */

:root{
  --bg-0: #0a0b0d;
  --bg-1: #16181c;
  --bg-2: #1f2227;
  --panel: #1b1d21;
  --line: rgba(255,255,255,.09);
  --line-strong: rgba(255,255,255,.16);
  --text: #f3f4f6;
  --text-dim: #9aa0a8;
  --text-faint: #666c74;
  --red: #e2142a;
  --red-dim: #a30f1f;
  --red-glow: rgba(226,20,42,.35);
  --radius: 3px;
  --ease: cubic-bezier(.22,.8,.28,1);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background: var(--bg-0);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  overflow:hidden;
  -webkit-font-smoothing: antialiased;
}

::selection{ background: var(--red); color:#fff; }

/* ---------- background texture ---------- */
.stage-bg{
  position:fixed; inset:0; z-index:0;
  background:
    radial-gradient(ellipse 120% 80% at 50% -10%, #26292f 0%, transparent 55%),
    radial-gradient(ellipse 100% 60% at 50% 110%, #16181c 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
}
.stage-bg::after{
  content:"";
  position:absolute; inset:0;
  background-image:
    repeating-linear-gradient(90deg, rgba(255,255,255,.015) 0px, rgba(255,255,255,.015) 1px, transparent 1px, transparent 64px);
  opacity:.5;
}

/* ---------- app shell ---------- */
.app{
  position:relative; z-index:1;
  height:100vh; height:100dvh;
  display:flex; flex-direction:column;
}

/* ---------- top bar ---------- */
.topbar{
  flex:0 0 auto;
  display:flex; align-items:center; justify-content:space-between;
  gap:12px;
  padding: 12px 20px;
  background: linear-gradient(180deg, rgba(10,11,13,.92), rgba(10,11,13,.75));
  border-bottom:1px solid var(--line);
  backdrop-filter: blur(10px);
}
.brand{
  display:flex; align-items:center; gap:10px;
  min-width:0;
}
.brand__mark{
  font-family:'Oswald', sans-serif;
  font-weight:700;
  font-size:19px;
  letter-spacing:.5px;
  color:#fff;
  white-space:nowrap;
}
.brand__mark .o{
  color: var(--red);
}
.brand__sep{
  width:1px; height:20px; background:var(--line-strong);
  display:none;
}
.brand__sub{
  font-size:11.5px;
  letter-spacing:1.6px;
  text-transform:uppercase;
  color: var(--text-dim);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
@media (min-width:640px){
  .brand__sep{ display:block; }
}

.topbar__actions{
  display:flex; align-items:center; gap:6px;
  flex:0 0 auto;
}
.icon-btn{
  appearance:none; border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--text);
  width:38px; height:38px;
  border-radius: var(--radius);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer;
  transition: border-color .18s var(--ease), background .18s var(--ease), color .18s var(--ease);
}
.icon-btn svg{ width:17px; height:17px; }
.icon-btn:hover{ border-color: var(--red); color:#fff; background: rgba(226,20,42,.12); }
.icon-btn:active{ transform: translateY(1px); }
.icon-btn[aria-pressed="true"]{ border-color: var(--red); background: rgba(226,20,42,.18); color:#fff; }

/* ---------- viewer ---------- */
.viewer{
  flex:1 1 auto;
  position:relative;
  display:flex; align-items:center; justify-content:center;
  padding: 14px 8px 10px;
  min-height:0;
  touch-action: pan-y;
}

.book-frame{
  position:relative;
  filter: drop-shadow(0 30px 60px rgba(0,0,0,.55));
  transition: width .25s var(--ease), height .25s var(--ease);
}
#book{
  width:100%;
  height:100%;
}

/* StPageFlip injects its own page markup inside #book; keep pages crisp */
#book img{
  -webkit-user-drag:none;
  user-select:none;
  pointer-events:none;
  width:100%; height:100%;
  object-fit:cover;
  display:block;
}

.page{
  background:#fff;
}
.page-loading{
  display:flex; align-items:center; justify-content:center;
  background: linear-gradient(135deg,#e9eaec,#d7d9dc);
  width:100%; height:100%;
}

/* side nav chevrons (desktop) */
.nav-edge{
  position:absolute; top:0; bottom:0;
  width:8%; min-width:34px; max-width:90px;
  display:flex; align-items:center;
  justify-content:center;
  background:transparent;
  border:none;
  cursor:pointer;
  color: rgba(255,255,255,.35);
  z-index:3;
  transition: color .18s var(--ease), background .18s var(--ease);
}
.nav-edge:hover{ color:#fff; background: linear-gradient(90deg, rgba(226,20,42,.08), transparent); }
.nav-edge.next:hover{ background: linear-gradient(270deg, rgba(226,20,42,.08), transparent); }
.nav-edge.prev{ left:0; }
.nav-edge.next{ right:0; }
.nav-edge svg{ width:26px; height:26px; }
@media (max-width:720px){
  .nav-edge{ display:none; }
}

/* ---------- bottom bar ---------- */
.bottombar{
  flex:0 0 auto;
  display:flex; flex-direction:column; gap:8px;
  padding: 8px 18px 16px;
  background: linear-gradient(0deg, rgba(10,11,13,.92), rgba(10,11,13,0));
}
.progress-row{
  display:flex; align-items:center; gap:12px;
}
.progress-track{
  flex:1;
  height:3px;
  background: var(--line);
  border-radius:2px;
  position:relative;
  cursor:pointer;
}
.progress-fill{
  position:absolute; left:0; top:0; bottom:0;
  width:0%;
  background: linear-gradient(90deg, var(--red-dim), var(--red));
  border-radius:2px;
  transition: width .25s var(--ease);
}
.progress-track:hover .progress-fill{ box-shadow: 0 0 10px var(--red-glow); }

.controls-row{
  display:flex; align-items:center; justify-content:center;
  gap:14px;
}
.controls-row .spacer{ flex:1; }
.page-indicator{
  font-variant-numeric: tabular-nums;
  font-size:13px;
  color: var(--text-dim);
  letter-spacing:.4px;
  min-width:74px;
  text-align:center;
}
.page-indicator b{ color:#fff; font-weight:600; }

.ctrl-btn{
  appearance:none; border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color:#fff;
  width:42px; height:42px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer;
  transition: border-color .18s var(--ease), background .18s var(--ease), transform .12s var(--ease);
}
.ctrl-btn svg{ width:18px; height:18px; }
.ctrl-btn:hover{ border-color:var(--red); background: rgba(226,20,42,.15); }
.ctrl-btn:active{ transform: scale(.94); }
.ctrl-btn:disabled{ opacity:.3; cursor:default; }
.ctrl-btn:disabled:hover{ border-color:var(--line); background: rgba(255,255,255,.03); }

/* ---------- loading overlay ---------- */
.loader{
  position:fixed; inset:0; z-index:50;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:18px;
  background: var(--bg-0);
  transition: opacity .5s var(--ease), visibility .5s;
}
.loader.hide{ opacity:0; visibility:hidden; pointer-events:none; }
.loader__mark{
  font-family:'Oswald', sans-serif;
  font-weight:700;
  font-size:26px;
  letter-spacing:1px;
  color:#fff;
}
.loader__mark .o{ color:var(--red); }
.loader__bar{
  width:200px; height:2px; background:var(--line); border-radius:2px; overflow:hidden;
}
.loader__bar i{
  display:block; height:100%; width:0%;
  background: linear-gradient(90deg, var(--red-dim), var(--red));
  transition: width .2s var(--ease);
}
.loader__pct{ font-size:11px; letter-spacing:2px; color:var(--text-faint); text-transform:uppercase; }

/* ---------- thumbnail grid overlay ---------- */
.grid-overlay{
  position:fixed; inset:0; z-index:40;
  background: rgba(8,9,10,.97);
  backdrop-filter: blur(6px);
  display:flex; flex-direction:column;
  opacity:0; visibility:hidden; pointer-events:none;
  transition: opacity .28s var(--ease), visibility .28s;
}
.grid-overlay.open{ opacity:1; visibility:visible; pointer-events:auto; }
.grid-overlay__head{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 22px;
  border-bottom:1px solid var(--line);
  flex:0 0 auto;
}
.grid-overlay__title{
  font-family:'Oswald', sans-serif;
  font-size:15px; letter-spacing:1.5px; text-transform:uppercase; color:#fff;
}
.grid-overlay__body{
  flex:1; overflow-y:auto;
  padding: 20px 22px 40px;
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap:14px;
}
.thumb{
  cursor:pointer;
  border-radius:2px;
  overflow:hidden;
  border:1px solid var(--line);
  position:relative;
  aspect-ratio: 210 / 297;
  background:#25272b;
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}
.thumb:hover{ border-color: var(--red); transform: translateY(-2px); }
.thumb img{ width:100%; height:100%; object-fit:cover; display:block; }
.thumb__num{
  position:absolute; left:0; bottom:0; right:0;
  font-size:10.5px; text-align:center; padding:3px 0;
  background: linear-gradient(0deg, rgba(0,0,0,.75), transparent);
  color:#fff; letter-spacing:.5px;
}
.thumb.active{ border-color: var(--red); box-shadow: 0 0 0 1px var(--red); }

/* ---------- hint (first-time swipe/click hint) ---------- */
.hint{
  position:absolute; bottom:14px; left:50%; transform:translateX(-50%);
  font-size:11.5px; letter-spacing:.5px; color: var(--text-faint);
  display:flex; align-items:center; gap:8px;
  opacity:0; animation: hintFade 6s ease forwards;
  pointer-events:none;
  z-index:2;
}
@keyframes hintFade{
  0%{ opacity:0; }
  8%{ opacity:1; }
  80%{ opacity:1; }
  100%{ opacity:0; }
}

/* ---------- zoom / lightbox overlay ---------- */
.zoom-overlay{
  position:fixed; inset:0; z-index:45;
  background: rgba(6,7,8,.97);
  display:flex; align-items:center; justify-content:center;
  opacity:0; visibility:hidden; pointer-events:none;
  transition: opacity .25s var(--ease), visibility .25s;
}
.zoom-overlay.open{ opacity:1; visibility:visible; pointer-events:auto; }
.zoom-overlay__img{
  max-width:92vw; max-height:88vh;
  object-fit:contain;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
  border-radius:2px;
  background:#fff;
}
.zoom-overlay__close{
  position:absolute; top:16px; right:16px; z-index:2;
}
.zoom-overlay__indicator{
  position:absolute; bottom:18px; left:50%; transform:translateX(-50%);
}
.zoom-overlay .nav-edge{
  display:flex;
  color: rgba(255,255,255,.55);
  width:12%;
  min-width:44px;
}
.zoom-overlay .nav-edge:hover{ color:#fff; }

/* ---------- scrollbar (grid overlay) ---------- */
.grid-overlay__body::-webkit-scrollbar{ width:8px; }
.grid-overlay__body::-webkit-scrollbar-thumb{ background: var(--line-strong); border-radius:4px; }
.grid-overlay__body::-webkit-scrollbar-track{ background:transparent; }

/* ---------- responsive tuning ---------- */
@media (max-width:480px){
  .topbar{ padding:10px 12px; }
  .brand__mark{ font-size:16px; }
  .brand__sub{ font-size:10px; letter-spacing:1.2px; }
  .icon-btn{ width:34px; height:34px; }
  .ctrl-btn{ width:38px; height:38px; }
  .bottombar{ padding: 6px 12px 14px; }
}

@media (max-width: 430px){
  .brand__sub{ display:none; }
}