@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@500;600;700&family=Golos+Text:wght@400;500;600;700&display=swap');

.fb{
  --fb-blue:#2f5bff;--fb-blue-d:#2144d8;--fb-violet:#7a3cff;--fb-cyan:#12b3e8;
  --fb-red:#e5352b;--fb-orange:#ff7a45;--fb-red-bg:#fdecea;
  --fb-green:#12b76a;--fb-green-d:#0b8a52;--fb-green-bg:#e7f8f0;
  --fb-amber:#f5a312;--fb-amber-bg:#fff4dd;--fb-amber-t:#8a5800;
  --fb-ink:#12142a;--fb-muted:#5b6178;
  --fb-line:#e5e8f4;--fb-line-2:#d3d9ec;
  --fb-surface:#f7f8fd;--fb-surface-2:#eef1fa;
  --fb-shadow-1:0 2px 10px rgba(18,20,42,.06);
  --fb-shadow-2:0 14px 38px rgba(18,20,42,.16);
  --fb-grad:linear-gradient(135deg,#2f5bff,#7a3cff);
  --fb-grad-fb2:linear-gradient(135deg,#2f5bff,#7a3cff);
  --fb-grad-epub:linear-gradient(135deg,#12b76a,#12b3a0);
  --fb-font-d:'Unbounded',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --fb-font-b:'Golos Text',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  background:#ffffff;color:var(--fb-ink);
  font-family:var(--fb-font-b);font-size:16px;line-height:1.5;
  max-width:1120px;margin:0 auto;padding:20px 22px 34px;position:relative;
}
.fb,.fb *,.fb *::before,.fb *::after{box-sizing:border-box}
.fb :where(h2,h3,p,ul,li,div,section,aside,details,summary){margin:0;padding:0}
.fb ul{list-style:none}
.fb img{display:block;max-width:100%}
.fb button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.fb [hidden]{display:none!important}
.fb ::selection{background:var(--fb-blue);color:#fff}
.fb ::-webkit-scrollbar{width:10px;height:10px}
.fb ::-webkit-scrollbar-track{background:#f4f6fc}
.fb ::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--fb-blue),var(--fb-green));border-radius:8px;border:2px solid #f4f6fc}
.fb :focus-visible{outline:3px solid rgba(47,91,255,.5);outline-offset:2px;border-radius:8px}
.fb .fb-ctl:focus-visible{outline:none}
.fb-ic{width:18px;height:18px;flex:none}

.fb-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 18px;border-radius:12px;font-weight:600;font-size:15px;transition:transform .18s,box-shadow .18s,background .18s,border-color .18s,color .18s;white-space:nowrap;user-select:none}
.fb-btn:active{transform:scale(.97)}
.fb-btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.fb-primary{background:var(--fb-grad);color:#fff;box-shadow:0 6px 18px rgba(47,91,255,.32)}
.fb-primary:hover:not([disabled]){transform:translateY(-1px);box-shadow:0 10px 24px rgba(47,91,255,.42);filter:brightness(1.05)}
.fb-outline{background:#fff;border:1.5px solid var(--fb-line-2);color:var(--fb-ink)}
.fb-outline:hover:not([disabled]){border-color:var(--fb-blue);color:var(--fb-blue-d);background:#f6f8ff}
.fb-danger{background:transparent;color:var(--fb-red)}
.fb-danger:hover:not([disabled]){background:var(--fb-red-bg)}
.fb-sm{height:34px;padding:0 12px;font-size:13.5px;border-radius:10px}
.fb-iconbtn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;border:1.5px solid var(--fb-line);background:#fff;color:var(--fb-muted);transition:.18s}
.fb-iconbtn:hover:not([disabled]){color:var(--fb-blue-d);border-color:var(--fb-blue);background:#f6f8ff}
.fb-iconbtn .fb-ic{width:16px;height:16px}

.fb-top{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--fb-line);position:relative}
.fb-top::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--fb-blue),var(--fb-violet),var(--fb-green),var(--fb-cyan))}
.fb-brand{display:flex;align-items:center;gap:10px;min-width:0}
.fb-logo{width:32px;height:32px;border-radius:9px;background:var(--fb-grad);display:grid;place-items:center;color:#fff;box-shadow:0 4px 12px rgba(47,91,255,.35);flex:none}
.fb-logo .fb-ic{width:17px;height:17px}
.fb-word{font-family:var(--fb-font-d);font-weight:700;font-size:15px;white-space:nowrap}
.fb-wf{color:var(--fb-blue)} .fb-wa{color:var(--fb-violet)} .fb-we{color:var(--fb-green-d)}
.fb-tag{font-size:11px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;color:var(--fb-muted);background:var(--fb-surface-2);padding:4px 9px;border-radius:999px}
.fb-top-r{margin-left:auto;display:flex;align-items:center;gap:10px}
.fb-sound{width:40px;height:40px;border-radius:11px}
.fb-sound.fb-off{color:var(--fb-muted);background:var(--fb-surface)}

.fb-hero{padding:28px 0 16px}
.fb-hero h2{font-family:var(--fb-font-d);font-weight:700;font-size:clamp(21px,3.5vw,33px);line-height:1.22;letter-spacing:-.4px;margin-bottom:12px}
.fb-gf{background:var(--fb-grad-fb2);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:var(--fb-blue)}
.fb-ge{background:var(--fb-grad-epub);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:var(--fb-green-d)}
.fb-lead{color:var(--fb-muted);font-size:17px;max-width:720px}
.fb-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.fb-badges li{display:flex;align-items:center;gap:7px;padding:8px 14px;border:1px solid var(--fb-line);border-radius:999px;background:#fff;font-size:14px;font-weight:600;box-shadow:var(--fb-shadow-1)}
.fb-badges .fb-ic{width:16px;height:16px}
.fb-badges li:nth-child(1) .fb-ic{color:var(--fb-violet)}
.fb-badges li:nth-child(2) .fb-ic{color:var(--fb-green-d)}
.fb-badges li:nth-child(3) .fb-ic{color:var(--fb-blue)}
.fb-badges li:nth-child(4) .fb-ic{color:var(--fb-amber)}
.fb-honest{display:flex;gap:12px;margin-top:16px;padding:14px 16px;border:1.5px solid var(--fb-amber-bg);background:var(--fb-amber-bg);border-radius:14px;color:var(--fb-amber-t);font-size:14px;line-height:1.5}
.fb-honest .fb-ic{color:var(--fb-amber);width:22px;height:22px;flex:none;margin-top:2px}
.fb-honest b{color:#6b4600}

.fb-warn{display:flex;align-items:center;gap:10px;background:var(--fb-red-bg);border:1px solid #f4c4c0;color:#8a1d16;border-radius:14px;padding:12px 16px;font-size:14px;font-weight:600;margin-bottom:16px}
.fb-warn .fb-ic{color:var(--fb-red);width:20px;height:20px}

.fb-modes{display:grid;grid-template-columns:1fr 1fr;gap:6px;background:var(--fb-surface-2);border-radius:16px;padding:5px;margin:16px 0}
.fb-mode{display:flex;align-items:center;justify-content:center;gap:10px;padding:13px 6px;border-radius:12px;font-weight:700;font-size:15px;color:var(--fb-muted);transition:.18s}
.fb-mode:hover{color:var(--fb-ink)}
.fb-mode.fb-on{background:var(--fb-grad);color:#fff;box-shadow:0 6px 16px rgba(47,91,255,.28)}
.fb-mode-fb{font-family:var(--fb-font-d);letter-spacing:.5px}
.fb-mode-ep{font-family:var(--fb-font-d);letter-spacing:.5px}

.fb-work{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:22px;align-items:start}
.fb-main{display:flex;flex-direction:column;gap:18px;min-width:0}
.fb-side{position:sticky;top:16px;display:flex;flex-direction:column;gap:16px;max-height:calc(100vh - 32px);overflow-y:auto;padding-right:5px;scrollbar-width:thin;scrollbar-color:#8fa2ff #f1f3fa}

.fb-dz{position:relative;border:2px dashed var(--fb-line-2);border-radius:24px;padding:28px 22px 24px;text-align:center;cursor:pointer;background:#fff;transition:border-color .2s,background .2s,transform .2s}
.fb-dz:hover{border-color:#9fb1ff;background:#fbfcff}
.fb-dz.fb-over{border-color:var(--fb-blue);background:#f0f4ff;transform:scale(1.005)}
.fb-ill{width:232px;max-width:76%;margin:0 auto 10px}
.fb-ill svg{display:block;width:100%;height:auto}
.fb-il-arrow{animation:fb-nudge 2.4s ease-in-out infinite}
@keyframes fb-nudge{0%,100%{transform:translateX(0)}50%{transform:translateX(5px)}}
.fb-dz-t{font-family:var(--fb-font-d);font-weight:600;font-size:18px;margin-bottom:6px}
.fb-dz-s{color:var(--fb-muted);font-size:14px;margin-bottom:12px}
.fb-dz-hint{margin-top:14px;font-size:13px;color:var(--fb-muted)}

.fb-panel{background:#fff;border:1px solid var(--fb-line);border-radius:20px;padding:18px;box-shadow:var(--fb-shadow-1)}
.fb-panel h3{font-family:var(--fb-font-d);font-weight:600;font-size:15px;display:flex;align-items:center;gap:9px;margin-bottom:14px}
.fb-panel h3 .fb-ic{color:var(--fb-blue)}
.fb-panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}

.fb-fileinfo{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--fb-line);border-left:3px solid var(--fb-blue);border-radius:12px;background:var(--fb-surface);margin-bottom:14px}
.fb-fi-icon{width:40px;height:50px;border-radius:6px;background:var(--fb-grad-fb2);display:grid;place-items:center;color:#fff;flex:none;box-shadow:var(--fb-shadow-1)}
.fb-fi-icon .fb-ic{width:18px;height:18px}
.fb-fi-meta{min-width:0;flex:1}
.fb-fi-name{font-weight:600;font-size:14.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fb-fi-sub{color:var(--fb-muted);font-size:12.5px;margin-top:2px}
.fb-dot{opacity:.55;margin:0 5px}

.fb-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.fb-fields .fb-field:first-child{grid-column:1/-1}

.fb-field{margin-bottom:15px}
.fb-field>label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:var(--fb-muted);margin-bottom:6px}
.fb-ctl{width:100%;height:44px;border:1.5px solid var(--fb-line-2);border-radius:12px;background:#fbfcff;padding:0 12px;font-family:var(--fb-font-b);font-size:15px;color:var(--fb-ink);transition:.15s}
.fb-ctl:focus{border-color:var(--fb-blue);box-shadow:0 0 0 4px rgba(47,91,255,.12);background:#fff}
.fb select.fb-ctl{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235b6178' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:38px;cursor:pointer}
.fb-hint{font-size:12.5px;color:var(--fb-muted);margin-top:6px;line-height:1.45}
.fb-switchfield{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.fb-sf-t{min-width:0}
.fb-switch{position:relative;width:46px;height:26px;flex:none;margin-top:2px}
.fb-switch input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%;margin:0}
.fb-switch .fb-tr{position:absolute;inset:0;background:#d8dded;border-radius:999px;transition:.2s;pointer-events:none}
.fb-switch .fb-tr::after{content:'';position:absolute;left:3px;top:3px;width:20px;height:20px;background:#fff;border-radius:50%;box-shadow:0 1px 3px rgba(0,0,0,.25);transition:.2s}
.fb-switch input:checked+.fb-tr{background:var(--fb-grad)}
.fb-switch input:checked+.fb-tr::after{transform:translateX(20px)}
.fb-switch input:focus-visible+.fb-tr{outline:3px solid rgba(47,91,255,.45);outline-offset:2px}
.fb-example{font-size:13px;color:var(--fb-muted);margin-top:6px;word-break:break-all}
.fb-convert{width:100%}
.fb-status{margin-top:10px;font-size:13.5px;color:var(--fb-muted);min-height:18px}

.fb-preview{max-height:360px;overflow-y:auto;border:1px solid var(--fb-line);border-radius:12px;background:var(--fb-surface);padding:10px;font-size:14px}
.fb-preview ol{padding-left:24px;margin:0}
.fb-preview li{padding:5px 0;color:var(--fb-ink)}
.fb-preview .fb-empty{color:var(--fb-muted);padding:8px}
.fb-preview h4{font-size:13.5px;color:var(--fb-muted);margin-bottom:6px;font-weight:600}

.fb-tip{display:flex;gap:11px;background:#f4fbff;border-color:#d9f1fb}
.fb-tip .fb-tip-ic{color:var(--fb-cyan);width:22px;height:22px;margin-top:2px;flex:none}
.fb-tip b{display:block;margin-bottom:6px}
.fb-tip ul{list-style:disc;padding-left:20px;margin-top:4px}
.fb-tip li{font-size:13.5px;color:var(--fb-muted);line-height:1.5;margin-bottom:3px}

.fb-faq{margin:40px 0 8px}
.fb-faq h3{font-family:var(--fb-font-d);font-weight:600;font-size:20px;margin-bottom:14px}
.fb-faq details{border:1px solid var(--fb-line);border-radius:14px;margin-bottom:10px;background:#fff;transition:border-color .2s,box-shadow .2s}
.fb-faq details[open]{border-color:#c9d4ff;box-shadow:var(--fb-shadow-1)}
.fb-faq summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px;font-weight:600;font-size:15.5px;cursor:pointer;list-style:none}
.fb-faq summary::-webkit-details-marker{display:none}
.fb-faq-plus{color:var(--fb-blue);transition:transform .2s}
.fb-faq details[open] .fb-faq-plus{transform:rotate(45deg)}
.fb-faq-a{padding:0 18px 16px}
.fb-faq-a p{font-size:15px;color:var(--fb-muted);line-height:1.65}

.fb-overlay{position:fixed;inset:0;z-index:9990;display:none;place-items:center;background:rgba(255,255,255,.86);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);pointer-events:none}
.fb-overlay.fb-on{display:grid}
.fb-do-box{border:3px dashed var(--fb-blue);border-radius:28px;padding:44px 60px;text-align:center;background:rgba(240,244,255,.65);margin:20px}
.fb-do-ic{width:54px;height:54px;color:var(--fb-blue);margin:0 auto;animation:fb-bounce 1s ease-in-out infinite}
@keyframes fb-bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.fb-do-t{font-family:var(--fb-font-d);font-weight:600;font-size:22px;margin-top:14px}
.fb-do-s{color:var(--fb-muted);font-size:15px;margin-top:6px}

.fb-toasts{position:fixed;right:18px;bottom:18px;z-index:9999;display:flex;flex-direction:column;align-items:flex-end;gap:10px}
.fb-toast{position:relative;display:flex;align-items:center;gap:10px;min-width:260px;max-width:380px;padding:12px 12px 15px 14px;background:#fff;border:1px solid var(--fb-line);border-radius:14px;box-shadow:var(--fb-shadow-2);overflow:hidden;animation:fb-toastIn .25s ease}
.fb-toast.fb-out{animation:fb-toastOut .2s ease both}
@keyframes fb-toastIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes fb-toastOut{to{opacity:0;transform:translateY(10px)}}
.fb-t-ic{width:20px;height:20px}
.fb-t-success .fb-t-ic{color:var(--fb-green-d)}.fb-t-error .fb-t-ic{color:var(--fb-red)}.fb-t-warn .fb-t-ic{color:var(--fb-amber)}.fb-t-info .fb-t-ic{color:var(--fb-blue)}
.fb-t-tx{flex:1;font-size:14px;font-weight:500;line-height:1.4}
.fb-t-x{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;color:var(--fb-muted);flex:none}
.fb-t-x:hover{color:var(--fb-ink);background:var(--fb-surface)}
.fb-t-x .fb-ic{width:14px;height:14px}
.fb-t-bar{position:absolute;left:0;bottom:0;height:3px;width:100%;transform-origin:left;animation:fb-tbar linear forwards}
.fb-t-success .fb-t-bar{background:var(--fb-green)}.fb-t-error .fb-t-bar{background:var(--fb-red)}.fb-t-warn .fb-t-bar{background:var(--fb-amber)}.fb-t-info .fb-t-bar{background:var(--fb-blue)}
@keyframes fb-tbar{from{transform:scaleX(1)}to{transform:scaleX(0)}}
.fb-pixel{position:fixed;width:7px;height:7px;border-radius:2px;pointer-events:none;z-index:10000}

@media (max-width:980px){
  .fb-work{grid-template-columns:1fr}
  .fb-side{position:static;max-height:none;overflow:visible;display:grid;grid-template-columns:1fr 1fr;padding-right:0}
}
@media (max-width:640px){
  .fb{padding:16px 16px 28px}
  .fb-side{grid-template-columns:1fr}
  .fb-fields{grid-template-columns:1fr}
  .fb-tag{display:none}
  .fb-toasts{left:12px;right:12px;bottom:12px;align-items:stretch}
  .fb-toast{max-width:none;min-width:0}
}
@media (prefers-reduced-motion:reduce){
  .fb *,.fb *::before,.fb *::after{animation:none!important;transition:none!important}
}