.upload-panel{width:100%;max-width:580px;margin:0 auto}.upload-zone{position:relative;border:2px dashed var(--slate-300);border-radius:var(--radius-xl);padding:56px 40px;text-align:center;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);background:var(--bg-surface);overflow:hidden}.upload-zone:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,#f59e0b08,#fbbf2408);opacity:0;transition:opacity .3s ease}.upload-zone:hover{border-color:var(--amber-400);transform:translateY(-2px);box-shadow:var(--shadow-lg),0 0 0 4px #f59e0b0f}.upload-zone:hover:before{opacity:1}.upload-zone.drag-over{border-color:var(--amber-500);border-style:solid;background:#f59e0b05;transform:translateY(-3px) scale(1.01);box-shadow:var(--shadow-xl),0 0 0 4px #f59e0b1a}.upload-zone.drag-over:before{opacity:1}.upload-zone.loading{cursor:wait;pointer-events:none}.upload-content{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:10px}.upload-icon-wrapper{position:relative;margin-bottom:8px}.upload-icon{font-size:56px;line-height:1;animation:gentle-float 4s ease-in-out infinite}@keyframes gentle-float{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}.upload-icon-glow{position:absolute;top:-16px;right:-16px;bottom:-16px;left:-16px;background:radial-gradient(circle,rgba(245,158,11,.1) 0%,transparent 70%);border-radius:50%;animation:glow-breathe 3s ease-in-out infinite}@keyframes glow-breathe{0%,to{transform:scale(1);opacity:.4}50%{transform:scale(1.1);opacity:.7}}.upload-title{font-family:var(--font-display);font-size:18px;font-weight:700;color:var(--text-primary);margin:0;letter-spacing:-.3px}.upload-subtitle{font-size:14px;color:var(--text-secondary);margin:0}.upload-or{display:flex;align-items:center;gap:14px;width:100%;max-width:240px;margin:6px 0}.upload-or-line{flex:1;height:1px;background:var(--slate-200)}.upload-or-text{font-size:12px;color:var(--text-tertiary);font-weight:500}.upload-btn{display:inline-flex;align-items:center;gap:8px;padding:11px 26px;background:var(--slate-900);color:#fff;border:none;border-radius:var(--radius-md);font-family:var(--font-display);font-size:14px;font-weight:700;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);box-shadow:0 2px 8px #0000001f}.upload-btn:hover{background:var(--slate-800);transform:translateY(-1px);box-shadow:0 4px 14px #0000002e}.upload-btn-icon{font-size:16px}.upload-info{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-top:16px;padding-top:16px;border-top:1px solid var(--border-subtle)}.upload-info-item{display:flex;align-items:center;gap:5px;font-size:12px;color:var(--text-tertiary);font-weight:500}.upload-info-icon{font-size:13px}.upload-filename{margin-top:14px;padding:10px 18px;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:13px;color:#047857;display:flex;align-items:center;gap:8px;font-weight:500}.upload-filename-icon{font-size:14px}.upload-loading{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:16px}.spinner-wrapper{position:relative;width:72px;height:72px}.spinner{width:100%;height:100%;border:3px solid var(--slate-200);border-top-color:var(--amber-500);border-right-color:var(--amber-400);border-radius:50%;animation:spin 1.2s linear infinite}.spinner-inner{position:absolute;top:10px;right:10px;bottom:10px;left:10px;border:2px solid var(--slate-100);border-bottom-color:var(--slate-400);border-left-color:var(--amber-300);border-radius:50%;animation:spin 1.8s linear infinite reverse}.spinner-icon{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:24px;animation:core-pulse 1.5s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes core-pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.8}}.loading-text{font-family:var(--font-display);font-size:15px;font-weight:700;color:var(--text-primary);margin:0}.loading-subtext{font-size:13px;color:var(--text-tertiary);margin:0}@media (max-width: 640px){.upload-zone{padding:36px 20px;border-radius:var(--radius-lg)}.upload-icon{font-size:44px}.upload-title{font-size:16px}.upload-info{flex-direction:column;gap:6px}}.template-selector{text-align:center}.template-selector-title{font-family:var(--font-display);font-size:18px;font-weight:700;color:var(--text-primary);margin:0 0 14px;letter-spacing:-.3px}.template-cards{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.template-card{display:flex;align-items:center;gap:10px;position:relative;background:var(--bg-surface);padding:14px 24px;border-radius:var(--radius-md);border:2px solid var(--border-subtle);cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);font-family:var(--font-display);font-size:14px;font-weight:500;color:var(--text-secondary)}.template-card:hover{transform:translateY(-1px);border-color:var(--slate-300);box-shadow:var(--shadow-md);color:var(--text-primary)}.template-card.selected{border-color:var(--amber-500);background:#f59e0b0a;box-shadow:0 0 0 3px #f59e0b1a;color:var(--text-primary);font-weight:700}.template-card-icon{font-size:20px}.template-card-name{font-weight:inherit}.template-card-check{position:absolute;top:-5px;right:-5px;width:20px;height:20px;background:var(--amber-500);color:#fff;border-radius:50%;font-size:11px;display:flex;align-items:center;justify-content:center;font-weight:700;box-shadow:0 2px 6px #f59e0b4d}@media (max-width: 480px){.template-cards{flex-direction:column;align-items:center}.template-card{width:100%;max-width:260px;justify-content:center}}:root{--slate-950: #0c0f1a;--slate-900: #111827;--slate-800: #1e293b;--slate-700: #334155;--slate-600: #475569;--slate-500: #64748b;--slate-400: #94a3b8;--slate-300: #cbd5e1;--slate-200: #e2e8f0;--slate-100: #f1f5f9;--slate-50: #f8fafc;--amber-500: #f59e0b;--amber-400: #fbbf24;--amber-300: #fcd34d;--amber-200: #fde68a;--emerald-500: #10b981;--emerald-400: #34d399;--emerald-600: #059669;--rose-500: #f43f5e;--rose-400: #fb7185;--rose-600: #e11d48;--indigo-500: #6366f1;--indigo-400: #818cf8;--bg-page: #f0f2f5;--bg-surface: #ffffff;--bg-surface-elevated: #ffffff;--text-primary: var(--slate-900);--text-secondary: var(--slate-500);--text-tertiary: var(--slate-400);--accent: var(--amber-500);--accent-light: var(--amber-200);--accent-glow: rgba(245, 158, 11, .15);--border-subtle: rgba(0, 0, 0, .06);--border-default: rgba(0, 0, 0, .1);--font-display: "DM Sans", "Noto Sans SC", sans-serif;--font-body: "DM Sans", "Noto Sans SC", sans-serif;--font-mono: "JetBrains Mono", monospace;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--radius-xl: 28px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .04), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .06), 0 1px 3px rgba(0, 0, 0, .04);--shadow-lg: 0 12px 40px rgba(0, 0, 0, .08), 0 4px 12px rgba(0, 0, 0, .04);--shadow-xl: 0 24px 64px rgba(0, 0, 0, .12), 0 8px 20px rgba(0, 0, 0, .06)}*{box-sizing:border-box}body{margin:0;font-family:var(--font-body);background:var(--bg-page);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{min-height:100vh;display:flex;flex-direction:column}.top-decoration{height:3px;background:linear-gradient(90deg,var(--amber-500),var(--amber-300),var(--amber-500));position:relative}.top-decoration:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,var(--amber-500),var(--amber-300),var(--amber-500));filter:blur(8px);opacity:.5}.app-header{background:var(--slate-950);color:#fff;padding:56px 24px 48px;text-align:center;position:relative;overflow:hidden}.app-header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse 600px 400px at 25% 100%,rgba(245,158,11,.08) 0%,transparent 70%),radial-gradient(ellipse 500px 350px at 75% 0%,rgba(99,102,241,.06) 0%,transparent 70%);pointer-events:none}.app-header:after{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}.header-content{position:relative;z-index:1;max-width:720px;margin:0 auto}.logo-section{display:flex;align-items:center;justify-content:center;gap:18px;margin-bottom:24px}.logo-icon{position:relative;font-size:44px;line-height:1}.logo-emoji{position:relative;z-index:1}.logo-glow{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:72px;height:72px;background:radial-gradient(circle,rgba(245,158,11,.25) 0%,transparent 70%);border-radius:50%;animation:glow-pulse 3s ease-in-out infinite}@keyframes glow-pulse{0%,to{transform:translate(-50%,-50%) scale(1);opacity:.6}50%{transform:translate(-50%,-50%) scale(1.15);opacity:.3}}.logo-text h1{margin:0;font-family:var(--font-display);font-size:36px;font-weight:700;letter-spacing:-.5px;color:#fff}.logo-badge{display:inline-block;padding:3px 10px;margin-top:6px;background:#f59e0b26;border:1px solid rgba(245,158,11,.3);border-radius:20px;font-family:var(--font-mono);font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:1.5px;color:var(--amber-300)}.header-desc{margin:0 0 28px;font-size:16px;font-weight:300;color:var(--slate-400);line-height:1.7}.header-features{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}.feature-tag{display:inline-flex;align-items:center;padding:7px 16px;background:#ffffff0d;border:1px solid rgba(255,255,255,.08);border-radius:24px;font-size:13px;font-weight:500;color:var(--slate-300);transition:all .25s ease}.feature-tag:hover{background:#ffffff1a;border-color:#f59e0b4d;color:var(--amber-300);transform:translateY(-1px)}.app-main{flex:1;max-width:960px;width:100%;margin:0 auto;padding:48px 24px 64px}.error-banner{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:#fef2f2;border:1px solid #fecaca;border-left:3px solid var(--rose-500);border-radius:var(--radius-md);margin-bottom:24px;box-shadow:var(--shadow-sm)}.error-banner-content{display:flex;align-items:center;gap:10px}.error-banner-icon{font-size:18px}.error-banner-text{color:var(--rose-600);font-weight:500;font-size:14px}.error-banner-close{background:none;border:none;color:var(--rose-500);cursor:pointer;font-size:18px;padding:4px 8px;border-radius:6px;transition:background .2s;line-height:1}.error-banner-close:hover{background:#f43f5e1a}.idle-container{display:flex;flex-direction:column;gap:48px}.features-section{text-align:center}.features-section h3{font-family:var(--font-display);font-size:22px;font-weight:700;color:var(--text-primary);margin:0 0 28px;letter-spacing:-.3px}.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature-card{background:var(--bg-surface);padding:28px 20px;border-radius:var(--radius-lg);border:1px solid var(--border-subtle);transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.feature-card:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--amber-400),transparent);opacity:0;transition:opacity .3s ease}.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--border-default)}.feature-card:hover:before{opacity:1}.feature-card .feature-icon{font-size:32px;margin-bottom:14px;display:block}.feature-card h4{margin:0 0 8px;font-family:var(--font-display);font-size:15px;font-weight:700;color:var(--text-primary);letter-spacing:-.2px}.feature-card p{margin:0;font-size:13px;color:var(--text-secondary);line-height:1.6}.processing-panel{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:64px 40px;background:var(--bg-surface);border-radius:var(--radius-xl);border:1px solid var(--border-subtle);box-shadow:var(--shadow-lg);text-align:center;position:relative;overflow:hidden}.processing-panel:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--amber-500),var(--amber-300),var(--amber-500));background-size:200% 100%;animation:shimmer-bar 2s linear infinite}@keyframes shimmer-bar{0%{background-position:200% 0}to{background-position:-200% 0}}.processing-animation{position:relative;width:110px;height:110px;margin-bottom:32px}.processing-ring{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);border-radius:50%;border:2px solid transparent}.ring-1{width:110px;height:110px;border-top-color:var(--amber-500);border-right-color:var(--amber-400);animation:spin 1.8s linear infinite}.ring-2{width:82px;height:82px;border-bottom-color:var(--slate-400);border-left-color:var(--slate-300);animation:spin 2.4s linear infinite reverse}.ring-3{width:54px;height:54px;border-top-color:var(--amber-300);animation:spin 1.2s linear infinite}.processing-core{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:28px;animation:core-pulse 1.5s ease-in-out infinite}@keyframes spin{to{transform:translate(-50%,-50%) rotate(360deg)}}@keyframes core-pulse{0%,to{transform:translate(-50%,-50%) scale(1);opacity:1}50%{transform:translate(-50%,-50%) scale(1.08);opacity:.8}}.processing-title{margin:0 0 16px;font-family:var(--font-display);font-size:24px;font-weight:700;color:var(--text-primary);letter-spacing:-.3px}.processing-file-info{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;background:var(--slate-100);border-radius:24px;margin-bottom:32px;border:1px solid var(--border-subtle)}.file-icon{font-size:14px}.file-name{font-family:var(--font-mono);font-size:13px;color:var(--text-secondary);font-weight:500}.processing-steps{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:32px;flex-wrap:wrap}.step-item{display:flex;flex-direction:column;align-items:center;gap:8px;padding:12px 16px;opacity:.3;transition:all .4s cubic-bezier(.4,0,.2,1);position:relative}.step-item.active{opacity:1}.step-item.current{transform:scale(1.05)}.step-item.current .step-icon{animation:step-bounce .8s ease-in-out infinite}@keyframes step-bounce{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}.step-icon{font-size:22px}.step-text{font-size:12px;color:var(--text-tertiary);white-space:nowrap;font-weight:500}.step-item.active .step-text{color:var(--text-primary);font-weight:700}.step-line{position:absolute;right:-18px;top:50%;width:20px;height:2px;background:var(--slate-200);border-radius:1px;transition:background .4s ease}.step-line.completed{background:var(--amber-400)}.processing-tip{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:#f59e0b0f;border:1px solid rgba(245,158,11,.12);border-radius:var(--radius-md);margin-bottom:16px;animation:tip-fade 3s ease-in-out}@keyframes tip-fade{0%{opacity:0;transform:translateY(6px)}12%{opacity:1;transform:translateY(0)}88%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-6px)}}.tip-icon{font-size:16px}.tip-text{font-size:13px;color:var(--amber-500);font-weight:500}.processing-timer{font-family:var(--font-mono);font-size:12px;color:var(--text-tertiary);letter-spacing:.5px}.success-panel{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:64px 40px;background:var(--bg-surface);border-radius:var(--radius-xl);border:1px solid var(--border-subtle);box-shadow:var(--shadow-lg);text-align:center}.success-animation{position:relative;width:88px;height:88px;margin-bottom:24px}.success-circle{position:absolute;top:0;left:0;width:100%;height:100%;border-radius:50%;background:var(--emerald-500);animation:success-scale .5s cubic-bezier(.34,1.56,.64,1)}.success-check{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:40px;color:#fff;font-weight:700;animation:check-pop .3s ease-out .2s both}@keyframes success-scale{0%{transform:scale(0)}to{transform:scale(1)}}@keyframes check-pop{0%{opacity:0;transform:translate(-50%,-50%) scale(0)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}.success-panel h2{margin:0 0 10px;font-family:var(--font-display);font-size:28px;font-weight:700;color:var(--emerald-600);letter-spacing:-.3px}.success-desc{margin:0 0 20px;font-size:15px;color:var(--text-secondary)}.success-file-info{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:var(--radius-md);margin-bottom:24px;font-family:var(--font-mono);font-size:13px;color:#047857;font-weight:500}.success-actions{margin-bottom:16px}.success-hint{margin:0;font-size:12px;color:var(--text-tertiary)}.error-panel{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:64px 40px;background:var(--bg-surface);border-radius:var(--radius-xl);border:1px solid var(--border-subtle);box-shadow:var(--shadow-lg);text-align:center;max-width:560px;margin:0 auto}.error-animation{position:relative;width:88px;height:88px;margin-bottom:24px}.error-circle{position:absolute;top:0;left:0;width:100%;height:100%;border-radius:50%;background:var(--rose-500);animation:error-shake .5s ease-out}.error-x{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:40px;color:#fff;font-weight:700}@keyframes error-shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-4px)}40%,80%{transform:translate(4px)}}.error-panel h2{margin:0 0 20px;font-family:var(--font-display);font-size:26px;font-weight:700;color:var(--rose-600);letter-spacing:-.3px}.error-detail{padding:14px 20px;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius-md);margin-bottom:20px;width:100%}.error-label{display:block;font-family:var(--font-mono);font-size:11px;color:#991b1b;font-weight:500;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}.error-message{margin:0;font-size:14px;color:#b91c1c;word-break:break-word;line-height:1.5}.error-suggestions{text-align:left;width:100%;padding:18px 20px;background:var(--slate-50);border:1px solid var(--border-subtle);border-radius:var(--radius-md);margin-bottom:24px}.error-suggestions h4{margin:0 0 10px;font-size:14px;font-weight:700;color:var(--text-primary)}.error-suggestions ul{margin:0;padding-left:18px}.error-suggestions li{font-size:13px;color:var(--text-secondary);margin-bottom:6px;line-height:1.5}.error-suggestions li:last-child{margin-bottom:0}.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:var(--slate-900);color:#fff;border:none;border-radius:var(--radius-md);font-family:var(--font-display);font-size:15px;font-weight:700;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);box-shadow:0 2px 8px #00000026;letter-spacing:-.1px}.btn-primary:hover:not(:disabled){background:var(--slate-800);transform:translateY(-1px);box-shadow:0 4px 16px #0003}.btn-primary:active{transform:translateY(0);box-shadow:0 1px 4px #00000026}.btn-primary:disabled{opacity:.5;cursor:wait}.app-footer{padding:28px 24px;background:var(--slate-950);color:var(--slate-500);border-top:1px solid rgba(255,255,255,.04)}.footer-content{max-width:960px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}.footer-brand{display:flex;align-items:center;gap:10px;font-size:13px}.footer-logo{font-family:var(--font-display);font-weight:700;color:#fff;letter-spacing:-.3px}.footer-divider{opacity:.2}.footer-tech{font-family:var(--font-mono);font-size:11px;color:var(--amber-500);letter-spacing:.5px}.footer-author{font-size:13px}.footer-author a{color:var(--amber-400);text-decoration:none;font-weight:500;transition:color .2s}.footer-author a:hover{color:var(--amber-300)}.footer-copyright{font-size:11px;opacity:.4}@media (max-width: 768px){.app-header{padding:36px 20px 32px}.logo-section{flex-direction:column;gap:10px}.logo-text h1{font-size:28px}.header-desc{font-size:14px}.header-features{gap:6px}.feature-tag{padding:5px 12px;font-size:12px}.app-main{padding:28px 16px 48px}.features-grid{grid-template-columns:repeat(2,1fr);gap:12px}.feature-card{padding:20px 16px}.feature-card .feature-icon{font-size:26px;margin-bottom:10px}.feature-card h4{font-size:14px}.feature-card p{font-size:12px}.processing-panel,.success-panel,.error-panel{padding:40px 20px;border-radius:var(--radius-lg)}.processing-title{font-size:20px}.processing-steps{flex-direction:column;gap:12px}.step-line{display:none}.step-item{flex-direction:row;gap:10px}.footer-brand{flex-direction:column;gap:6px}.footer-divider{display:none}}@media (max-width: 480px){.features-grid{grid-template-columns:1fr}}