:root{
    --bg:#05060b;
    --ink:#e9f1ff;
    --muted:#7c88b0;
    --line:rgba(120,170,255,.16);
    --panel:#0b0f1c;
    --panel2:#0e1424;
    --cyan:#00f0ff;
    --magenta:#ff00e5;
    --red:#ff2d55;
    --lime:#39ff14;
    --amber:#ffb800;
    --font:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  }
  *{box-sizing:border-box}
  html,body{margin:0}
  body{
    font-family:var(--font);
    background:var(--bg);
    color:var(--ink);
    min-height:100vh;
    overflow-x:hidden;
  }
  /* ---------- punk background ---------- */
  .bgfx{position:fixed;inset:0;z-index:-3;overflow:hidden;pointer-events:none}
  .bgfx i{position:absolute;border-radius:50%;filter:blur(100px);opacity:.5;animation:drift 20s ease-in-out infinite}
  .bgfx .g1{width:560px;height:560px;background:var(--magenta);top:-160px;left:-120px}
  .bgfx .g2{width:520px;height:520px;background:var(--cyan);bottom:-200px;right:-120px;animation-delay:-7s}
  .bgfx .g3{width:460px;height:460px;background:var(--red);top:35%;left:60%;animation-delay:-13s}
  @keyframes drift{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(70px,-50px) scale(1.12)}66%{transform:translate(-60px,40px) scale(.93)}}
  .gridlines{position:fixed;inset:0;z-index:-2;pointer-events:none;
    background-image:linear-gradient(rgba(0,240,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,0,229,.05) 1px,transparent 1px);
    background-size:44px 44px;
    mask-image:radial-gradient(circle at 50% 22%,#000 0%,transparent 78%);}
  .scanlines{position:fixed;inset:0;z-index:9;pointer-events:none;opacity:.35;
    background:repeating-linear-gradient(to bottom,rgba(255,255,255,.028) 0 1px,transparent 1px 3px);mix-blend-mode:overlay}

  .shell{max-width:940px;margin:0 auto;padding:38px 18px 70px}

  /* ---------- title ---------- */
  .head{text-align:center;margin-bottom:26px}
  .glitch{position:relative;display:inline-block;font-size:clamp(26px,4.6vw,46px);font-weight:900;letter-spacing:1px;
    color:#fff;text-shadow:0 0 18px rgba(255,45,85,.55);line-height:1.25}
  .glitch::before,.glitch::after{content:attr(data-text);position:absolute;left:0;top:0;width:100%;overflow:hidden}
  .glitch::before{color:var(--cyan);clip-path:polygon(0 2%,100% 2%,100% 40%,0 40%);animation:gl1 2.6s infinite steps(2,end);opacity:.9}
  .glitch::after{color:var(--magenta);clip-path:polygon(0 58%,100% 58%,100% 100%,0 100%);animation:gl2 3.1s infinite steps(2,end);opacity:.9}
  @keyframes gl1{0%,88%,100%{transform:translate(0,0)}90%{transform:translate(-3px,-1px)}94%{transform:translate(3px,1px)}}
  @keyframes gl2{0%,84%,100%{transform:translate(0,0)}86%{transform:translate(3px,1px)}92%{transform:translate(-2px,-1px)}}
  .sub{margin-top:10px;color:var(--muted);font-size:14.5px;letter-spacing:.3px}
  .sub b{color:var(--cyan);font-weight:700}
  .badge-local{display:inline-flex;align-items:center;gap:6px;margin-top:14px;padding:5px 13px;border-radius:999px;
    font-size:12px;font-weight:700;letter-spacing:.5px;color:var(--lime);
    border:1px solid rgba(57,255,20,.4);background:rgba(57,255,20,.08);box-shadow:0 0 18px rgba(57,255,20,.15)}
  .backlink{display:inline-block;margin-top:14px;text-decoration:none;color:var(--cyan);font-size:12.5px;font-weight:700;
    letter-spacing:.5px;border:1px solid rgba(0,240,255,.35);border-radius:999px;padding:6px 15px;transition:.2s}
  .backlink:hover{box-shadow:0 0 14px rgba(0,240,255,.35);background:rgba(0,240,255,.08)}

  /* ---------- panels ---------- */
  .card{background:linear-gradient(180deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:14px;
    box-shadow:0 20px 50px rgba(0,0,0,.55)}

  /* empty dropzone */
  .drop{padding:52px 22px;text-align:center;cursor:pointer;position:relative;overflow:hidden;
    transition:.25s;border-radius:14px}
  .drop:hover{border-color:rgba(0,240,255,.55);box-shadow:0 0 0 1px rgba(0,240,255,.3),0 24px 60px rgba(0,240,255,.16)}
  .drop.drag{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,240,255,.28),0 24px 70px rgba(0,240,255,.28)}
  .drop .bolt{font-size:46px;filter:drop-shadow(0 0 14px rgba(255,0,229,.6))}
  .drop h2{margin:14px 0 6px;font-size:19px;font-weight:800;letter-spacing:.5px}
  .drop p{margin:0;color:var(--muted);font-size:13px}
  .drop .hintline{margin-top:16px;font-size:12px;color:var(--muted)}
  .drop .hintline kbd{background:rgba(255,255,255,.08);border:1px solid var(--line);border-radius:5px;padding:1px 6px;margin:0 2px;font-size:11px}

  /* ---------- file rows ---------- */
  .list{margin-top:0}
  .row{display:flex;align-items:center;gap:14px;padding:15px 16px;border-bottom:1px solid var(--line);
    background:linear-gradient(90deg,rgba(255,255,255,.018),transparent);transition:.2s}
  .row:last-child{border-bottom:none}
  .row:hover{background:linear-gradient(90deg,rgba(0,240,255,.05),transparent)}
  .thumb{width:42px;height:42px;border-radius:9px;flex:none;object-fit:cover;background:#0a0e1a;border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;font-size:19px;color:var(--muted)}
  .fn{flex:1;min-width:0;font-weight:600;font-size:14.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .fext{color:var(--muted);font-size:12px;margin-left:7px;font-weight:500}
  .to{color:var(--muted);font-size:13px;flex:none}
  select{appearance:none;-webkit-appearance:none;background:#0f1626 url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M0 0l5 6 5-6z' fill='%2300f0ff'/></svg>") no-repeat right 11px center;
    border:1px solid rgba(0,240,255,.35);color:var(--ink);border-radius:9px;padding:9px 30px 9px 13px;font-weight:800;font-size:13.5px;
    letter-spacing:.5px;cursor:pointer;transition:.2s;font-family:var(--font)}
  select:hover{border-color:var(--cyan);box-shadow:0 0 14px rgba(0,240,255,.28)}
  select:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 2px rgba(0,240,255,.25)}
  .st{flex:none;font-size:11.5px;font-weight:800;letter-spacing:.5px;padding:5px 10px;border-radius:7px;white-space:nowrap}
  .st.ready{color:var(--lime);background:rgba(57,255,20,.1);border:1px solid rgba(57,255,20,.35)}
  .st.working{color:var(--amber);background:rgba(255,184,0,.1);border:1px solid rgba(255,184,0,.35)}
  .st.done{color:var(--cyan);background:rgba(0,240,255,.12);border:1px solid rgba(0,240,255,.4)}
  .st.error{color:var(--red);background:rgba(255,45,85,.12);border:1px solid rgba(255,45,85,.4)}
  .sz{flex:none;color:var(--muted);font-size:12.5px;font-variant-numeric:tabular-nums;min-width:120px;text-align:right}
  .sz b{color:var(--cyan);font-weight:700}
  .act{flex:none;display:flex;gap:8px;align-items:center}
  .iconbtn{width:30px;height:30px;flex:none;border-radius:8px;border:1px solid var(--line);background:rgba(255,255,255,.03);
    color:var(--muted);cursor:pointer;font-size:14px;line-height:1;display:flex;align-items:center;justify-content:center;transition:.2s}
  .iconbtn:hover{border-color:var(--red);color:var(--red);box-shadow:0 0 12px rgba(255,45,85,.3)}
  .iconbtn.dl{border-color:rgba(0,240,255,.4);color:var(--cyan);text-decoration:none}
  .iconbtn.dl:hover{box-shadow:0 0 14px rgba(0,240,255,.4)}

  /* convert-all + settings */
  .cfg{display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:center;padding:16px;color:var(--muted);font-size:13px}
  .cfg label{display:flex;align-items:center;gap:9px}
  input[type=range]{width:130px;accent-color:var(--magenta)}
  .cfg input[type=number]{width:76px;background:#0f1626;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:7px 9px;font-size:13px}
  .cfg input[type=number]:focus{outline:none;border-color:var(--cyan)}
  .cfg .qv{color:var(--cyan);font-weight:800;min-width:30px}

  /* ---------- action bar ---------- */
  .bar{margin-top:0;display:flex;align-items:center;gap:16px;padding:13px 16px;
    background:linear-gradient(180deg,#0a0f1d,#060910);border:1px solid var(--line);border-radius:0 0 14px 14px;
    border-top:2px solid rgba(255,45,85,.5);position:relative;flex-wrap:wrap}
  .bar .topline{position:absolute;top:-2px;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--cyan),var(--magenta),var(--red),var(--cyan));
    background-size:300% 100%;animation:slide 3s linear infinite}
  @keyframes slide{to{background-position:300% 0}}
  .btn-add{display:inline-flex;align-items:center;gap:9px;padding:12px 18px;border-radius:9px;border:none;cursor:pointer;
    background:#fff;color:#05060b;font-weight:900;font-size:14px;letter-spacing:.5px;transition:.18s}
  .btn-add:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(255,255,255,.25)}
  .bar .hint{color:var(--muted);font-size:12px;flex:1;min-width:120px}
  .clouds{display:flex;gap:6px;flex:none;opacity:.32}
  .clouds svg{width:22px;height:22px;fill:var(--muted)}
  .btn-go{margin-left:auto;display:inline-flex;align-items:center;gap:12px;padding:13px 30px;border:none;border-radius:10px;cursor:pointer;
    font-weight:900;font-size:15px;letter-spacing:2px;color:#fff;
    background:linear-gradient(100deg,var(--red),var(--magenta));box-shadow:0 10px 30px rgba(255,45,85,.4);
    transition:.18s;clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px)}
  .btn-go:hover{filter:brightness(1.12);transform:translateY(-2px)}
  .btn-go:active{transform:scale(.98)}
  .btn-go:disabled{opacity:.45;cursor:not-allowed;filter:grayscale(.5);transform:none}
  .btn-go .arw{font-size:19px;line-height:0}

  /* ---------- supported formats ---------- */
  .formats{margin-top:44px}
  .formats h2{font-size:15px;letter-spacing:2px;text-transform:uppercase;color:var(--muted);text-align:center;margin:0 0 20px}
  .formats h2 span{color:var(--cyan)}
  .fgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:11px}
  .fcard{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:13px 15px;border-radius:11px;
    text-decoration:none;border:1px solid var(--line);background:linear-gradient(180deg,var(--panel),var(--panel2));
    transition:.2s;position:relative;overflow:hidden}
  .fcard:hover{border-color:var(--cyan);transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,240,255,.18)}
  .fcard:hover .fname-l{color:var(--cyan)}
  .fname-l{font-weight:900;letter-spacing:.5px;font-size:15px;color:#fff;transition:.2s}
  .ftag{font-size:10px;font-weight:800;letter-spacing:.4px;padding:2px 7px;border-radius:999px}
  .ftag.native{color:var(--lime);background:rgba(57,255,20,.1);border:1px solid rgba(57,255,20,.3)}
  .ftag.wasm{color:var(--amber);background:rgba(255,184,0,.1);border:1px solid rgba(255,184,0,.3)}
  .ftag.js{color:var(--cyan);background:rgba(0,240,255,.1);border:1px solid rgba(0,240,255,.3)}

  .foot{margin-top:40px;text-align:center;color:var(--muted);font-size:12px;line-height:1.8}
  .foot b{color:var(--lime)}

  /* toast */
  #toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(24px);z-index:99;
    padding:12px 22px;border-radius:10px;font-size:13.5px;font-weight:700;opacity:0;pointer-events:none;transition:.32s;
    box-shadow:0 14px 34px rgba(0,0,0,.6)}
  #toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
  #toast.ok{background:rgba(57,255,20,.14);border:1px solid var(--lime);color:var(--lime)}
  #toast.err{background:rgba(255,45,85,.16);border:1px solid var(--red);color:#ff8fa3}
  #toast.info{background:rgba(0,240,255,.13);border:1px solid var(--cyan);color:var(--cyan)}
  .spin{width:13px;height:13px;border:2px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;display:inline-block;animation:sp .7s linear infinite;vertical-align:-2px}
  @keyframes sp{to{transform:rotate(360deg)}}
  .hidden{display:none!important}