/* S.I.G.N — Elektron kataloq */
:root{
  --navy:#244b73; --main:#2f5f8f; --logo:#285078; --light:#5880b8;
  --ink:#14263d; --muted:#6b7a8c; --line:#d9e0e8;
  --stage:#e6ebf1; --white:#fff;
  --top-h:64px; --tools-h:56px;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--stage);overflow:hidden;-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.ic{width:1em;height:1em;display:block;flex:0 0 auto}

/* ---- Top bar ---- */
.fb-top{position:fixed;inset:0 0 auto 0;height:var(--top-h);display:flex;align-items:center;gap:18px;padding:0 20px;background:var(--white);border-bottom:1px solid var(--line);z-index:30}
.fb-brand{display:flex;align-items:center;height:100%;text-decoration:none}
.fb-brand img{height:40px;width:auto;display:block}
.fb-brand-txt{font-weight:800;font-size:22px;color:var(--logo);letter-spacing:.04em}
.fb-title{display:flex;flex-direction:column;line-height:1.2;padding-left:18px;border-left:1px solid var(--line);min-width:0}
.fb-title strong{font-size:15px;font-weight:600;color:var(--ink)}
.fb-title span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fb-top-actions{margin-left:auto;display:flex;gap:8px}
.fb-btn{display:inline-flex;align-items:center;gap:7px;height:38px;padding:0 14px;border-radius:6px;font-size:14px;font-weight:600;text-decoration:none;border:1px solid transparent;transition:background .15s,border-color .15s,color .15s}
.fb-btn .ic{font-size:19px}
.fb-btn-solid{background:var(--navy);color:#fff}
.fb-btn-solid:hover{background:var(--logo)}
.fb-btn-ghost{color:var(--navy);border-color:var(--line);background:#fff}
.fb-btn-ghost:hover{border-color:var(--navy)}

/* ---- Stage ---- */
.fb-stage{background:var(--stage) url(siz-fon.svg) repeat;background-size:420px 420px;position:fixed;left:0;right:0;top:var(--top-h);bottom:calc(var(--tools-h) + 20px);display:flex;align-items:center;justify-content:center;padding:22px 76px 8px}
.fb-shift{transition:transform .6s cubic-bezier(.4,.1,.2,1);will-change:transform}
.fb-holder{margin:0 auto;filter:drop-shadow(0 18px 28px rgba(20,38,61,.22)) drop-shadow(0 2px 4px rgba(20,38,61,.12))}
.fb-book{margin:0 auto}
.fb-page-el{background:#fff;overflow:hidden}
.fb-page-el .pg{position:absolute;inset:0;background:#fff}
.fb-page-el img{position:absolute;inset:0;width:100%;height:100%;object-fit:fill;display:block;user-select:none;-webkit-user-drag:none;pointer-events:none}
.fb-page-el .pg-wait{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#b6c2cf;font-size:28px}
.fb-page-el .pg-wait .ic{animation:fbspin 1s linear infinite}
.fb-page-el .pg-shade{position:absolute;top:0;bottom:0;width:9%;pointer-events:none}
.stf__item.--left .pg-shade{right:0;background:linear-gradient(to left,rgba(0,0,0,.16),rgba(0,0,0,.04) 35%,rgba(0,0,0,0))}
.stf__item.--right .pg-shade{left:0;background:linear-gradient(to right,rgba(0,0,0,.13),rgba(0,0,0,.03) 35%,rgba(0,0,0,0))}
.--portrait .stf__item .pg-shade{display:none}
.stf__item.--hard .pg-shade{display:none}

.fb-side{position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--navy);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:24px;box-shadow:0 4px 14px rgba(20,38,61,.10);transition:opacity .2s,background .15s,color .15s;z-index:5}
.fb-side:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.fb-side[disabled]{opacity:0;pointer-events:none}
.fb-side-prev{left:16px}.fb-side-next{right:16px}

/* ---- Loader ---- */
.fb-loader{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--stage);z-index:8;transition:opacity .4s}
.fb-loader.is-done{opacity:0;pointer-events:none}
.fb-loader-box{text-align:center;color:var(--navy);width:260px}
.fb-loader-box>.ic{font-size:46px;margin:0 auto 10px}
.fb-loader-txt{font-size:14px;font-weight:600;margin-bottom:12px}
.fb-bar{height:4px;background:#d3dbe5;border-radius:2px;overflow:hidden}
.fb-bar span{display:block;height:100%;width:0;background:var(--navy);transition:width .2s}
.fb-loader.is-error .fb-bar{display:none}
.fb-loader.is-error .fb-loader-txt{font-weight:500;color:var(--ink);line-height:1.5}

/* ---- Toolbar ---- */
.fb-tools{position:fixed;left:0;right:0;margin:0 auto;width:max-content;bottom:14px;height:var(--tools-h);display:flex;align-items:center;gap:2px;padding:0 8px;background:var(--navy);border-radius:10px;box-shadow:0 10px 30px rgba(20,38,61,.28);z-index:20;max-width:calc(100vw - 16px)}
.fb-tool{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:0;background:transparent;color:#fff;border-radius:6px;cursor:pointer;font-size:21px;text-decoration:none;flex:0 0 auto;transition:background .15s,opacity .15s}
.fb-tool:hover{background:rgba(255,255,255,.12)}
.fb-tool.is-on{background:rgba(255,255,255,.18)}
.fb-tool[disabled]{opacity:.35;pointer-events:none}
.fb-sep{width:1px;height:26px;background:rgba(255,255,255,.2);margin:0 6px;flex:0 0 auto}
.fb-page{display:flex;align-items:center;gap:6px;color:#cfdbe8;font-size:14px;padding:0 4px;white-space:nowrap}
.fb-page input{width:62px;height:34px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:#fff;border-radius:6px;text-align:center;font:inherit;font-weight:600;outline:none}
.fb-page input:focus{border-color:#fff;background:rgba(255,255,255,.15)}

/* ---- Panels ---- */
.fb-panel{position:fixed;top:0;bottom:0;left:0;width:360px;max-width:92vw;background:#fff;z-index:50;transform:translateX(-102%);transition:transform .3s cubic-bezier(.4,.1,.2,1);display:flex;flex-direction:column}
.fb-panel.is-open{transform:none;box-shadow:8px 0 30px rgba(20,38,61,.18)}
.fb-panel-head{height:var(--top-h);flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 12px 0 20px;border-bottom:1px solid var(--line);font-size:15px}
.fb-x{width:38px;height:38px;border:0;background:transparent;border-radius:6px;font-size:20px;cursor:pointer;color:var(--muted)}
.fb-x:hover{background:#eef2f6;color:var(--ink)}
.fb-dim{position:fixed;inset:0;background:rgba(20,38,61,.35);z-index:40;opacity:0;pointer-events:none;transition:opacity .3s}
.fb-dim.is-on{opacity:1;pointer-events:auto}
.fb-thumbs{flex:1;overflow:auto;padding:16px;display:grid;grid-template-columns:1fr 1fr;gap:16px 14px;align-content:start}
.fb-thumb{border:0;background:none;padding:0;cursor:pointer;text-align:center}
.fb-thumb .im{position:relative;background:#f1f4f7;border:1px solid var(--line);border-radius:3px;overflow:hidden;transition:border-color .15s,box-shadow .15s}
.fb-thumb img{display:block;width:100%;height:100%;object-fit:fill}
.fb-thumb:hover .im{border-color:var(--light)}
.fb-thumb.is-cur .im{border-color:var(--navy);box-shadow:0 0 0 2px var(--navy)}
.fb-thumb span{display:block;font-size:12px;color:var(--muted);margin-top:6px}
.fb-thumb.is-cur span{color:var(--navy);font-weight:600}

.fb-search{position:relative;margin:16px 16px 8px}
.fb-search .ic{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:18px}
.fb-search input{width:100%;height:44px;border:1px solid var(--line);border-radius:6px;padding:0 12px 0 38px;font:inherit;font-size:15px;outline:none}
.fb-search input:focus{border-color:var(--navy)}
.fb-results{flex:1;overflow:auto;padding:4px 16px 20px}
.fb-muted{color:var(--muted);font-size:13px;line-height:1.5;margin:8px 2px}
.fb-res{display:block;width:100%;text-align:left;border:0;border-bottom:1px solid #edf1f5;background:none;padding:12px 4px;cursor:pointer;border-radius:0}
.fb-res:hover{background:#f5f8fb}
.fb-res b{display:block;font-size:12px;color:var(--navy);margin-bottom:3px;font-weight:600}
.fb-res span{font-size:13px;line-height:1.45;color:var(--ink)}
.fb-res mark{background:#ffe58a;color:inherit;padding:0 1px}

/* ---- Zoom ---- */
.fb-zoom{position:fixed;inset:0;background:#2a2f36;z-index:60;display:none;flex-direction:column}
.fb-zoom.is-open{display:flex}
.fb-zoom-bar{height:56px;flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 10px 0 18px;background:var(--navy);color:#cfdbe8;font-size:14px}
.fb-zoom-scroll{flex:1;overflow:auto;cursor:grab;-webkit-overflow-scrolling:touch}
.fb-zoom-scroll.is-drag{cursor:grabbing}
.fb-zoom-inner{display:flex;gap:0;margin:24px auto;width:max-content;box-shadow:0 10px 40px rgba(0,0,0,.4)}
.fb-zoom-inner .zp{position:relative;background:#fff}
.fb-zoom-inner img{display:block;width:100%;height:100%}

/* ---- Toast ---- */
.fb-toast{position:fixed;left:50%;bottom:calc(var(--tools-h) + 30px);transform:translate(-50%,10px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:6px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;z-index:70}
.fb-toast.is-on{opacity:1;transform:translate(-50%,0)}

@keyframes fbspin{to{transform:rotate(360deg)}}

/* Tam ekran */
:fullscreen body,body.is-full{background:var(--stage)}

/* ---- Responsive ---- */
@media (max-width:900px){
  .fb-stage{padding:14px 12px 6px}
  .fb-side{display:none}
  .fb-title{display:none}
}
@media (max-width:640px){
  :root{--top-h:56px;--tools-h:52px}
  .fb-top{padding:0 12px;gap:10px}
  .fb-brand img{height:32px}
  .fb-hide-sm{display:none}
  .fb-btn{height:36px;padding:0 12px;font-size:13px}
  .fb-tools{bottom:10px;padding:0 4px}
  .fb-tool{width:38px;height:40px;font-size:20px}
  .fb-sep{margin:0 2px}
  .fb-page input{width:52px}
  .fb-stage{bottom:calc(var(--tools-h) + 14px)}
}
@media (max-width:420px){
  .fb-hide-xs{display:none}
  .fb-sep{display:none}
  .fb-tools{gap:0}
  .fb-tool{width:35px;font-size:19px}
  .fb-page{gap:4px;font-size:13px;padding:0 2px}
  .fb-page input{width:48px}
  .fb-btn span{display:none}
  .fb-btn{width:40px;padding:0;justify-content:center}
}
@media (max-height:480px) and (orientation:landscape){
  :root{--top-h:48px;--tools-h:46px}
  .fb-brand img{height:28px}
  .fb-stage{padding:8px 60px 4px}
  .fb-tool{height:38px}
}

/* Labeled tools (search / download) */
.fb-tool-lbl{width:auto;padding:0 12px;gap:7px;font-size:14px;font-weight:600}
.fb-tool-lbl .ic{font-size:20px}
.fb-tool-dl{background:#fff;color:var(--navy);margin-left:6px}
.fb-tool-dl:hover{background:#e8eef5}
.fb-tool.is-pulse{animation:fbpulse 1.4s ease-out 3}
@keyframes fbpulse{0%{box-shadow:0 0 0 0 rgba(255,255,255,.7)}100%{box-shadow:0 0 0 12px rgba(255,255,255,0)}}

/* First-visit hint */
.fb-hint{position:fixed;left:50%;bottom:calc(var(--tools-h) + 30px);transform:translate(-50%,12px);width:min(420px,calc(100vw - 24px));background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 14px 40px rgba(20,38,61,.22);padding:16px 16px 12px;z-index:25;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s}
.fb-hint.is-on{opacity:1;pointer-events:auto;transform:translate(-50%,0)}
.fb-hint::after{content:"";position:absolute;left:50%;bottom:-7px;width:12px;height:12px;background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transform:translateX(-50%) rotate(45deg)}
.fb-hint-row{display:flex;gap:12px;align-items:flex-start;font-size:13.5px;line-height:1.45;color:var(--ink);margin-bottom:10px}
.fb-hint-row .ic{font-size:20px;color:var(--navy);margin-top:1px;flex:0 0 auto;width:34px;height:34px;padding:7px;border:1px solid var(--line);border-radius:6px}
.fb-hint-row b{color:var(--navy)}
.fb-hint-ok{display:block;margin-left:auto;height:34px;padding:0 16px;border:0;border-radius:6px;background:var(--navy);color:#fff;font-weight:600;font-size:13px;cursor:pointer}
.fb-hint-ok:hover{background:var(--logo)}

@media (max-width:640px){
  .fb-tool-lbl span{display:none}
  .fb-tool-lbl{width:38px;padding:0}
  .fb-tool-dl{margin-left:2px}
}
@media (max-width:420px){ .fb-tool-lbl{width:35px} }