/* E-katalog: flipbook sahnesi ve katalog kartları */

/* ---------- Katalog listesi ---------- */
.ebooks{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:34px 26px}
.ebook{display:grid;gap:16px;color:inherit}
.ebook-cover{position:relative;border-radius:4px 14px 14px 4px;overflow:hidden;background:var(--bg-2);box-shadow:0 30px 50px -28px rgba(7,9,15,.55),0 2px 0 rgba(0,0,0,.04);
  transform:perspective(1100px) rotateY(0);transform-origin:left center;transition:transform .8s var(--ease),box-shadow .8s var(--ease)}
.ebook-cover img{width:100%;height:100%;object-fit:cover}
.ebook-spine{position:absolute;inset:0 auto 0 0;width:16px;background:linear-gradient(90deg,rgba(0,0,0,.3),rgba(255,255,255,.22) 45%,rgba(0,0,0,.1))}
.ebook:hover .ebook-cover{transform:perspective(1100px) rotateY(-18deg);box-shadow:26px 36px 60px -30px rgba(7,9,15,.6)}
.ebook-body{display:grid;gap:4px}
.ebook-body b{font:700 18px var(--fh)}
.ebook-body small{color:var(--blue);font-weight:600;font-size:13px}
.ebook-body span{color:var(--muted);font-size:14px}

/* ---------- Flipbook sahnesi ---------- */
.fb{--fb-bg:#0b0f19;position:relative;background:radial-gradient(1200px 600px at 50% 30%,#1b2440,var(--fb-bg) 70%);color:#fff;padding-top:86px;
  height:100vh;height:100svh;min-height:560px;display:flex;flex-direction:column;overflow:hidden}
.fb.is-full{padding-top:0}
.fb-top{display:flex;align-items:center;gap:14px;padding:14px var(--pad) 6px;position:relative;z-index:3}
.fb-back{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.08);flex:none;transition:background .2s}
.fb-back:hover{background:rgba(255,255,255,.16)}
.fb-back svg,.fb-btn svg{width:20px;height:20px}
.fb-title{flex:1;min-width:0}
.fb-title h1{font:700 clamp(16px,1.6vw,20px) var(--fh);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fb-title small{color:#9aa6c2;font-size:12.5px}
.fb-top-actions{display:flex;gap:8px}
.fb-btn{height:42px;min-width:42px;padding:0 10px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:6px;color:#dfe6f5;background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.08);font-weight:600;font-size:13.5px;transition:background .2s,color .2s,transform .2s}
.fb-btn:hover:not(:disabled){background:rgba(255,255,255,.16);color:#fff}
.fb-btn:disabled{opacity:.35;cursor:default}
.fb-btn[aria-pressed="true"],.fb-btn[aria-expanded="true"]{background:var(--blue);border-color:var(--blue);color:#fff}
.fb-btn .off{display:none}.fb-btn.muted .on{display:none}.fb-btn.muted .off{display:inline}

.fb-stage{position:relative;flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:8px clamp(56px,6vw,90px)}
.fb-book{width:100%;height:100%;max-height:100%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .6s var(--ease)}
.fb.ready .fb-book{opacity:1}
.fb-book .stf__parent{margin:auto}
.fb-mount{width:100%;display:flex;justify-content:center}
.fb-pg{background:#fff;overflow:hidden;position:relative}
.fb-pg img{width:100%;height:100%;object-fit:contain;display:block;opacity:0;transition:opacity .4s;user-select:none}
.fb-pg.ready img{opacity:1}
.fb-pg::before{content:"";position:absolute;inset:0;background:linear-gradient(110deg,#f1f3f8 30%,#fff 50%,#f1f3f8 70%);background-size:220% 100%;animation:fbShimmer 1.4s infinite linear}
.fb-pg.ready::before{display:none}
.fb-pg-n{position:absolute;bottom:8px;left:50%;transform:translateX(-50%);font:600 10px var(--fb);color:#9aa3b5;opacity:0}
.fb-pg:not(.ready) .fb-pg-n{opacity:1}
@keyframes fbShimmer{to{background-position:-120% 0}}
.fb-nav{position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.1);color:#fff;display:grid;place-items:center;z-index:2;transition:background .2s,opacity .2s}
.fb-nav svg{width:24px;height:24px}
.fb-nav:hover:not(:disabled){background:var(--blue)}
.fb-nav:disabled{opacity:0;pointer-events:none}
.fb-nav.prev{left:clamp(6px,1.5vw,24px)}.fb-nav.next{right:clamp(6px,1.5vw,24px)}

.fb-bar{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px var(--pad) 16px;position:relative;z-index:3;flex-wrap:wrap}
.fb-sep{width:1px;height:26px;background:rgba(255,255,255,.14);margin:0 6px}
.fb-page{display:inline-flex;align-items:center;gap:6px;height:42px;padding:0 12px;border-radius:12px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.08);font:600 14px var(--fb);color:#b8c2d9}
.fb-page input{width:44px;background:transparent;border:0;color:#fff;font:inherit;text-align:right;-moz-appearance:textfield}
.fb-page input::-webkit-inner-spin-button{-webkit-appearance:none}
.fb-page input:focus{outline:none}
.fb-page:focus-within{border-color:var(--blue)}

.fb-thumbs{position:absolute;left:0;right:0;bottom:78px;z-index:4;display:flex;gap:10px;overflow-x:auto;padding:14px var(--pad);background:rgba(7,9,15,.82);backdrop-filter:blur(12px);scrollbar-width:thin}
.fb-thumbs[hidden]{display:none}
.fb-thumbs button{flex:none;display:grid;gap:4px;justify-items:center;opacity:.6;transition:opacity .2s,transform .2s}
.fb-thumbs button:hover{opacity:1;transform:translateY(-3px)}
.fb-thumbs button.on{opacity:1}
.fb-thumbs img{height:96px;min-width:60px;border-radius:4px;background:#fff;box-shadow:0 8px 16px -8px rgba(0,0,0,.6)}
.fb-thumbs button.on img{outline:2px solid var(--blue);outline-offset:2px}
.fb-thumbs span{font:600 11px var(--fb);color:#9aa6c2}

.fb-zoom{position:fixed;inset:0;z-index:3000;background:rgba(5,7,12,.96);opacity:0;transition:opacity .25s}
.fb-zoom.show{opacity:1}
.fb-zoom-scroll{position:absolute;inset:0;overflow:auto;cursor:grab;display:flex;align-items:flex-start;justify-content:center;touch-action:pan-x pan-y pinch-zoom}
.fb-zoom-scroll:active{cursor:grabbing}
.fb-zoom img{max-width:none;width:min(1600px,160vw);height:auto;margin:40px auto;cursor:zoom-out;user-select:none;-webkit-user-drag:none}
.fb-zoom.fit img{width:auto;max-width:94vw;max-height:94vh;margin:3vh auto;cursor:zoom-in}
.fb-zoom-x{position:fixed;top:16px;right:16px;z-index:2}
.fb-tip{position:absolute;left:50%;bottom:90px;transform:translateX(-50%);padding:10px 16px;border-radius:12px;background:#fff;color:var(--ink);font-weight:600;font-size:14px;z-index:5;animation:fbTip 1.8s var(--ease) both}
@keyframes fbTip{0%{opacity:0;transform:translate(-50%,10px)}12%,80%{opacity:1;transform:translate(-50%,0)}100%{opacity:0}}

/* Açılış: kapak 3D olarak açılır */
.fb-intro{position:absolute;inset:0;display:grid;place-items:center;align-content:center;gap:18px;z-index:2;perspective:2200px;transition:opacity .6s var(--ease)}
.fb-intro.gone{opacity:0}
.fb-intro-book{position:relative;height:min(70vh,640px);aspect-ratio:var(--ar);transform-style:preserve-3d;transform:rotateX(8deg) rotateY(-8deg) scale(.92);transition:transform 1.1s var(--ease)}
.fb-intro-page{position:absolute;inset:0;background:linear-gradient(90deg,#e9edf5,#fff 20%);border-radius:2px 6px 6px 2px;box-shadow:0 40px 80px -30px rgba(0,0,0,.7)}
.fb-intro-cover{position:absolute;inset:0;transform-origin:left center;transform-style:preserve-3d;transition:transform 1.1s cubic-bezier(.65,0,.35,1);border-radius:2px 6px 6px 2px;overflow:hidden;box-shadow:0 40px 80px -30px rgba(0,0,0,.7)}
.fb-intro-cover img{width:100%;height:100%;object-fit:cover;backface-visibility:hidden}
.fb-intro-cover::after{content:"";position:absolute;inset:0 auto 0 0;width:18px;background:linear-gradient(90deg,rgba(0,0,0,.35),rgba(255,255,255,.2) 50%,transparent)}
.fb-intro.open .fb-intro-book{transform:rotateX(0) rotateY(0) scale(1) translateX(50%)}
.fb-intro.open .fb-intro-cover{transform:rotateY(-165deg)}
.fb-intro-hint{font-size:13px;color:#9aa6c2;letter-spacing:.08em}
.fb-intro.open .fb-intro-hint{opacity:0;transition:opacity .3s}

.fb-text summary{font:700 16px var(--fh)}
.fb-text section+section{margin-top:18px}
.fb-text h2{font:700 13px var(--fb);letter-spacing:.1em;text-transform:uppercase;color:var(--blue)}
.fb-text p{color:var(--muted);font-size:14.5px;margin-top:6px}

@media (max-width:700px){
  .fb{padding-top:78px;min-height:520px}
  .fb-stage{padding:4px 8px}
  .fb-nav{display:none}
  .fb-btn span{display:none}
  .fb-sep{display:none}
  .fb-bar{gap:4px;padding-bottom:12px}
  .fb-bar .fb-btn{min-width:38px;height:38px}
  .fb-thumbs{bottom:66px}
}

/* Flipbook sayfasında yüzen WhatsApp/telefon düğmeleri kontrol çubuğunu kapatmasın */
body:has(.fb) .float-cta{display:none}
/* Sayfa içi bağlantılar: hafif vurgu, üzerine gelince belirginleşir */
.fb-link{position:absolute;z-index:2;border-radius:6px;background:rgba(47,116,255,.08);box-shadow:inset 0 0 0 1.5px rgba(47,116,255,.35);transition:background .25s,box-shadow .25s;cursor:pointer}
.fb-link:hover,.fb-link:focus-visible{background:rgba(47,116,255,.18);box-shadow:inset 0 0 0 2px var(--blue,#0b4fd1);outline:none}
@media (hover:none){.fb-link{background:rgba(47,116,255,.12)}}