*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#060B18;--bg2:#0A1225;--surface:rgba(12,20,40,0.85);--surface2:rgba(18,30,55,0.7);--surface3:rgba(25,40,70,0.5);
  --blue:#4F8CFF;--blue-dim:#3A6FD8;--blue-glow:rgba(79,140,255,0.15);--blue-soft:rgba(79,140,255,0.08);
  --purple:#A78BFA;--purple-glow:rgba(167,139,250,0.12);
  --cyan:#22D3EE;--teal:#2DD4BF;--indigo:#818CF8;
  --gold:#FBBF24;--rose:#FB7185;--emerald:#34D399;
  --text:#F1F5F9;--text2:#94A3B8;--text3:#64748B;
  --border:rgba(255,255,255,0.06);--border2:rgba(255,255,255,0.1);
  --radius:24px;--radius-sm:16px;--radius-xs:10px;
  --shadow:0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg:0 8px 48px rgba(0,0,0,0.4);
  --glow:0 0 30px rgba(79,140,255,0.2),0 0 60px rgba(79,140,255,0.08);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --mono:'SF Mono',Monaco,'Cascadia Code','Fira Code',monospace;
}
@media(prefers-color-scheme:dark){:root{
  --bg:#060B18;--bg2:#0A1225;--surface:rgba(12,20,40,0.85);--surface2:rgba(18,30,55,0.7);--surface3:rgba(25,40,70,0.5);
  --text:#F1F5F9;--text2:#94A3B8;--text3:#64748B;--border:rgba(255,255,255,0.06);--border2:rgba(255,255,255,0.1);
  --shadow:0 4px 24px rgba(0,0,0,0.3);--shadow-lg:0 8px 48px rgba(0,0,0,0.4);--glow:0 0 30px rgba(79,140,255,0.2),0 0 60px rgba(79,140,255,0.08);
}}
@media(prefers-color-scheme:light){:root{
  --bg:#F0F4FF;--bg2:#E8EEFF;--surface:rgba(255,255,255,0.92);--surface2:rgba(240,244,255,0.85);--surface3:rgba(220,230,250,0.6);
  --blue:#2563EB;--blue-dim:#1D4ED8;--blue-glow:rgba(37,99,235,0.1);--blue-soft:rgba(37,99,235,0.06);
  --purple:#7C3AED;--purple-glow:rgba(124,58,237,0.08);
  --text:#0F172A;--text2:#475569;--text3:#94A3B8;--border:rgba(0,0,0,0.06);--border2:rgba(0,0,0,0.1);
  --shadow:0 4px 24px rgba(0,0,0,0.06);--shadow-lg:0 8px 48px rgba(0,0,0,0.08);--glow:0 0 30px rgba(37,99,235,0.1),0 0 60px rgba(37,99,235,0.04);
}}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;transition:background .4s,color .4s}

.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.hero-bg{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.4;pointer-events:none}
.orb1{width:500px;height:500px;background:var(--blue);top:-150px;right:-100px;animation:orbF 20s ease-in-out infinite}
.orb2{width:400px;height:400px;background:var(--purple);bottom:-100px;left:-80px;animation:orbF 25s ease-in-out infinite reverse}
.orb3{width:300px;height:300px;background:var(--cyan);top:40%;left:30%;animation:orbF 18s ease-in-out infinite}
.orb4{width:250px;height:250px;background:var(--indigo);top:20%;right:20%;animation:orbF 22s ease-in-out infinite reverse}
@keyframes orbF{0%,100%{transform:translate(0,0)}25%{transform:translate(30px,-20px)}50%{transform:translate(-20px,30px)}75%{transform:translate(20px,10px)}}
.grid-lines{position:absolute;inset:0;background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);background-size:60px 60px;opacity:.25}
.hero-content{position:relative;z-index:2;text-align:center;padding:20px;width:100%;max-width:580px}
.brand{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:10px}
.brand-icon{width:44px;height:44px;color:var(--blue);filter:drop-shadow(0 0 20px rgba(79,140,255,0.5));animation:iPulse 3s ease-in-out infinite}
@keyframes iPulse{0%,100%{filter:drop-shadow(0 0 20px rgba(79,140,255,0.5))}50%{filter:drop-shadow(0 0 35px rgba(79,140,255,0.7))}}
.brand-name{font-size:2.8rem;font-weight:800;background:linear-gradient(135deg,var(--blue),var(--purple),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-1px}
.hero-tag{color:var(--text2);font-size:1.05rem;font-weight:500;margin-bottom:28px}

.drop-zone{border:1.5px dashed var(--border2);border-radius:var(--radius);padding:48px 28px;text-align:center;cursor:pointer;transition:all .3s;background:var(--surface);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);position:relative;box-shadow:var(--shadow)}
.drop-zone:hover{border-color:var(--blue);box-shadow:var(--glow)}
.drop-zone.dragover{border-color:var(--blue);background:var(--blue-soft);transform:scale(1.01);box-shadow:var(--shadow-lg),var(--glow)}
.drop-ring{position:absolute;inset:-10px;pointer-events:none;z-index:1}
.drop-ring svg{width:100%;height:100%;animation:spin 30s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.drop-content{position:relative;z-index:2;pointer-events:none}
.drop-icon-wrap{width:64px;height:64px;margin:0 auto 14px;background:linear-gradient(135deg,var(--blue-glow),var(--purple-glow));border-radius:18px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border)}
.drop-icon{width:28px;height:28px;stroke:var(--blue);fill:none;stroke-width:1.5;transition:transform .2s}
.drop-zone:hover .drop-icon{transform:translateY(-3px)}
.drop-title{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.drop-sub{color:var(--text2);font-size:.85rem}
.drop-hint{color:var(--text3);font-size:.72rem;margin-top:8px}
.drop-zone input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer;z-index:10}
.drop-glow{position:absolute;inset:0;background:radial-gradient(circle at 50% 50%,var(--blue-glow),transparent 70%);opacity:0;transition:opacity .3s;pointer-events:none;z-index:3}
.drop-zone.dragover .drop-glow{opacity:1}

.upload-card{margin-top:20px;background:linear-gradient(135deg,rgba(79,140,255,0.08),rgba(167,139,250,0.06));border:1px solid var(--border2);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-lg),var(--glow);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);animation:slideUp .4s ease;position:relative;overflow:hidden}
.upload-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--blue),var(--purple),var(--cyan));animation:shimmer 2s infinite}
@keyframes shimmer{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}
@keyframes slideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.uc-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.uc-title{display:flex;align-items:center;gap:8px;font-size:.88rem;font-weight:700;color:var(--blue);letter-spacing:-.2px}
.uc-title svg{width:18px;height:18px;stroke:var(--blue);fill:none;stroke-width:2;animation:spinIcon 2s linear infinite}
@keyframes spinIcon{to{transform:rotate(360deg)}}
.uc-close{width:28px;height:28px;border-radius:8px;border:1px solid var(--border);background:var(--surface2);color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}
.uc-close:hover{border-color:var(--blue);color:var(--blue);box-shadow:var(--glow)}
.uc-close svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2}
.upload-list{display:flex;flex-direction:column;gap:10px}
.upload-item{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;animation:slideUp .3s ease;transition:border-color .2s}
.upload-item:hover{border-color:var(--blue-glow)}
.upload-header{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.file-icon{width:36px;height:36px;stroke:var(--blue);fill:none;stroke-width:1.5;flex-shrink:0;background:linear-gradient(135deg,var(--blue-glow),var(--purple-glow));border:1px solid var(--border);border-radius:10px;padding:7px;transition:all .2s}
.file-icon.spinning svg{animation:spin360 1s linear infinite}
@keyframes spin360{to{transform:rotate(360deg)}}
.upload-item:hover .file-icon{background:linear-gradient(135deg,var(--blue),var(--purple));border-color:transparent}
.upload-item:hover .file-icon svg{stroke:#fff}
.file-info{flex:1;min-width:0}
.file-name{font-weight:700;font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-.2px}
.file-meta{color:var(--text3);font-size:.7rem;margin-top:2px;display:flex;gap:6px;font-weight:500}
.file-status{font-size:.7rem;white-space:nowrap;font-weight:700;padding:4px 12px;border-radius:100px;letter-spacing:.2px}
.file-status.uploading{color:var(--blue);background:linear-gradient(135deg,var(--blue-glow),var(--purple-glow));border:1px solid var(--blue-glow)}
.file-status.done{color:var(--emerald);background:rgba(52,211,153,0.1);border:1px solid rgba(52,211,153,0.2)}
.file-status.error{color:var(--rose);background:rgba(251,113,133,0.1);border:1px solid rgba(251,113,133,0.2)}
.progress-wrap{margin-top:8px}
.progress-bar{width:100%;height:4px;background:var(--surface3);border-radius:2px;overflow:hidden}
.progress-bar .fill{height:100%;background:linear-gradient(90deg,var(--blue),var(--purple),var(--cyan));border-radius:2px;transition:width .1s;width:0%;position:relative}
.progress-bar .fill::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.3),transparent);animation:progressShine 1.5s infinite}
@keyframes progressShine{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}
.progress-stats{display:flex;justify-content:space-between;margin-top:6px;font-size:.68rem;color:var(--text3);font-weight:500}
.progress-stats .speed{color:var(--blue);font-weight:700;font-size:.76rem;font-variant-numeric:tabular-nums;font-family:var(--mono)}
.progress-stats .pct{color:var(--text);font-weight:700;font-family:var(--mono)}
.url-result{margin-top:12px;background:linear-gradient(135deg,rgba(52,211,153,0.06),rgba(79,140,255,0.06));border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px;transition:border-color .3s;position:relative;overflow:hidden}
.url-result::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,var(--emerald),var(--blue))}
.ur-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.ur-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);flex-shrink:0;transition:all .2s}
.ur-icon svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.5}
.url-result:hover .ur-icon{background:var(--blue-glow);border-color:var(--blue)}
.ur-info{flex:1;min-width:0}
.ur-title{font-size:.85rem;font-weight:700;color:var(--text);letter-spacing:-.2px}
.ur-sub{font-size:.72rem;color:var(--text2);margin-top:2px;font-weight:500}
.ur-sub strong{color:var(--blue);font-weight:600}
.ur-tiny{margin-bottom:8px}
.url-label{font-size:.6rem;color:var(--text3);font-weight:700;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}
.url-row{display:flex;gap:6px;align-items:center}
.url-row input{flex:1;min-width:0;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-xs);padding:7px 10px;font-size:.73rem;color:var(--text);font-family:'SF Mono',Monaco,monospace}
.url-row input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-glow)}
.btn-sm{padding:7px 12px;border-radius:var(--radius-xs);border:1px solid var(--border);background:var(--surface2);color:var(--text);font-size:.72rem;font-weight:600;cursor:pointer;transition:all .15s;white-space:nowrap;display:inline-flex;align-items:center;gap:4px}
.btn-sm:hover{border-color:var(--blue);background:var(--blue-soft)}
.btn-sm.copied{background:var(--emerald);border-color:var(--emerald);color:#fff}
.btn-sm svg{width:12px;height:12px}
.btn-open{background:var(--surface2);border:1px solid var(--border);color:var(--text);font-size:.72rem;font-weight:600;padding:7px 12px;border-radius:var(--radius-xs);cursor:pointer;transition:all .15s;white-space:nowrap;display:inline-flex;align-items:center;gap:4px;text-decoration:none}
.btn-open:hover{border-color:var(--blue);background:var(--blue-soft)}
.btn-open svg{width:12px;height:12px}
.url-extras{display:flex;gap:10px;margin-top:6px;font-size:.68rem;flex-wrap:wrap}
.url-extras .ok{color:var(--emerald);font-weight:500;display:inline-flex;align-items:center;gap:3px}
.url-extras .ok svg{width:11px;height:11px}
.url-extras .dim{color:var(--text3)}

.rest{min-height:100vh;background:var(--bg2);border-top:1px solid var(--border);transition:background .4s}
.rest-inner{max-width:800px;margin:0 auto;padding:60px 20px 40px}
.section-title{display:flex;align-items:center;gap:10px;font-size:1.15rem;font-weight:700;margin-bottom:20px;color:var(--text)}
.section-title svg{width:22px;height:22px;stroke:var(--blue);fill:none;stroke-width:2}

.how-section{margin-bottom:48px}
.steps{display:flex;align-items:center;justify-content:center;gap:16px}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:28px 24px;text-align:center;box-shadow:var(--shadow);transition:all .25s;flex:1;max-width:200px;backdrop-filter:blur(10px);position:relative;overflow:hidden}
.step::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,var(--blue-glow),var(--purple-glow));opacity:0;transition:opacity .25s}
.step:hover::before{opacity:1}
.step:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow-lg),var(--glow)}
.step-icon{width:48px;height:48px;margin:0 auto 14px;background:linear-gradient(135deg,var(--blue),var(--purple));border-radius:14px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(79,140,255,0.3);position:relative;z-index:1}
.step-icon svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:1.5}
.step-title{font-size:.9rem;font-weight:700;margin-bottom:4px;position:relative;z-index:1}
.step-desc{font-size:.72rem;color:var(--text3);position:relative;z-index:1}
.step-arrow{flex-shrink:0}
.step-arrow svg{width:20px;height:20px;stroke:var(--text3);fill:none;stroke-width:2}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.history-empty{text-align:center;padding:48px 20px;color:var(--text3);font-size:.85rem}
.history-empty svg{width:40px;height:40px;stroke:var(--text3);fill:none;stroke-width:1;opacity:.4;margin:0 auto 12px;display:block}
.history-empty p{max-width:260px;margin:0 auto;line-height:1.5}
.history-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:all .2s;cursor:pointer;box-shadow:var(--shadow)}
.history-card:hover{border-color:var(--blue);transform:translateY(-2px);box-shadow:var(--shadow-lg),var(--glow)}
.card-preview{width:100%;height:80px;background:var(--surface2);display:flex;align-items:center;justify-content:center}
.card-preview svg{width:30px;height:30px;stroke:var(--text3);fill:none;stroke-width:1.5}
.card-body{padding:12px}
.card-title{font-weight:600;font-size:.8rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-meta{color:var(--text3);font-size:.68rem;margin-top:3px;display:flex;gap:5px}
.card-actions{display:flex;gap:5px;margin-top:8px;flex-wrap:wrap}
.card-actions button,.card-actions a{font-size:.68rem;padding:5px 10px;border-radius:var(--radius-xs);text-decoration:none;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:3px;font-weight:600}
.card-actions button:hover,.card-actions a:hover{border-color:var(--blue);background:var(--blue-soft)}
.card-actions .btn-p{background:var(--blue);border-color:var(--blue);color:#fff}
.card-actions .btn-p:hover{background:var(--blue-dim)}
.card-actions svg{width:11px;height:11px}
.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--text3);font-size:.75rem;padding:6px 14px;border-radius:var(--radius-xs);cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:4px;font-weight:600}
.btn-ghost:hover{border-color:var(--rose);color:var(--rose)}
.btn-ghost svg{width:13px;height:13px}

.features-section{margin-top:48px;padding-top:40px;border-top:1px solid var(--border)}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.fcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:22px 14px;text-align:center;box-shadow:var(--shadow);transition:all .25s;backdrop-filter:blur(10px)}
.fcard:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow-lg),var(--glow)}
.ficon{width:44px;height:44px;margin:0 auto 12px;background:linear-gradient(135deg,var(--blue-glow),var(--purple-glow));border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;transition:all .25s}
.fcard:hover .ficon{background:linear-gradient(135deg,var(--blue),var(--purple));border-color:transparent;box-shadow:0 4px 20px rgba(79,140,255,0.3)}
.ficon svg{width:20px;height:20px;stroke:var(--blue);fill:none;stroke-width:1.5;transition:stroke .2s}
.fcard:hover .ficon svg{stroke:#fff}
.fcard h3{font-size:.82rem;font-weight:700;margin-bottom:3px}
.fcard p{font-size:.7rem;color:var(--text2);line-height:1.4}

.faq-section{margin-top:48px;padding-top:40px;border-top:1px solid var(--border)}
.faq-list{display:flex;flex-direction:column;gap:8px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xs);overflow:hidden;transition:border-color .2s;backdrop-filter:blur(10px)}
.faq-item:hover{border-color:var(--blue)}
.faq-q{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;font-weight:600;font-size:.88rem;cursor:pointer;user-select:none}
.faq-q svg{width:16px;height:16px;stroke:var(--text3);fill:none;stroke-width:2;transition:transform .25s}
.faq-item.open .faq-q svg{transform:rotate(180deg);stroke:var(--blue)}
.faq-a{padding:0 18px 0;font-size:.82rem;color:var(--text2);line-height:1.6;max-height:0;overflow:hidden;transition:max-height .35s,padding .35s}
.faq-item.open .faq-a{max-height:200px;padding:0 18px 16px}

.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:1000;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(8px)}
.modal-content{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);max-width:90vw;max-height:90vh;position:relative;overflow:auto;box-shadow:var(--shadow-lg)}
.modal-close{position:absolute;top:12px;right:12px;width:34px;height:34px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;z-index:10;display:flex;align-items:center;justify-content:center;transition:all .15s}
.modal-close:hover{border-color:var(--rose);color:var(--rose)}
.modal-close svg{width:16px;height:16px}
.modal-body{padding:16px}
.modal-body img,.modal-body video,.modal-body audio{max-width:100%;border-radius:8px}

.toast-box{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:8px;z-index:1000}
.toast{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xs);padding:12px 18px;font-size:.82rem;font-weight:500;animation:toastIn .3s ease;max-width:300px;box-shadow:var(--shadow-lg);backdrop-filter:blur(20px)}
.toast.success{border-color:var(--emerald);color:var(--emerald)}
.toast.error{border-color:var(--rose);color:var(--rose)}
@keyframes toastIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

footer{text-align:center;padding:32px 0;color:var(--text3);font-size:.75rem;border-top:1px solid var(--border);margin-top:48px}
.footer-links{display:flex;gap:8px;justify-content:center;margin-bottom:8px}
.footer-links a{color:var(--blue);text-decoration:none;font-weight:600;font-size:.78rem}
.footer-links span{color:var(--text3)}

@media(max-width:700px){.features-grid{grid-template-columns:repeat(2,1fr)}.steps{flex-wrap:wrap}.step-arrow{display:none}}
@media(max-width:600px){.brand-name{font-size:2rem}.drop-zone{padding:36px 18px}.features-grid{grid-template-columns:1fr 1fr}.step{padding:20px 16px}.rest-inner{padding:40px 16px 32px}}
@media(max-width:380px){.features-grid{grid-template-columns:1fr}.step{max-width:100%}}