:root{--bg-dark: #060911;--bg-card: #0F1523;--bg-card-hover: #151D30;--bg-input: #172033;--border-color: rgba(255, 255, 255, .08);--border-active: #2563EB;--primary-blue: #2563EB;--primary-hover: #1D4ED8;--success-green: #10B981;--accent-purple: #8B5CF6;--text-primary: #F8FAFC;--text-secondary: #94A3B8;--text-muted: #64748B;--radius-lg: 16px;--radius-md: 12px;--radius-sm: 8px;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", sans-serif}*{box-sizing:border-box;margin:0;padding:0;-ms-overflow-style:none;scrollbar-width:none}*::-webkit-scrollbar,html::-webkit-scrollbar,body::-webkit-scrollbar{display:none;width:0!important;height:0!important}body{background-color:var(--bg-dark);color:var(--text-primary);font-family:var(--font-family);min-height:100vh;display:flex;flex-direction:column;align-items:center;overflow-x:hidden}.navbar{width:100%;max-width:1360px;padding:16px 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-color)}.nav-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text-primary)}.brand-icon{background:linear-gradient(135deg,#2563eb,#8b5cf6);width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff}.brand-title{font-size:20px;font-weight:700;letter-spacing:-.4px}.nav-actions{display:flex;align-items:center;gap:12px}.btn-github{background-color:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary);padding:8px 14px;border-radius:var(--radius-sm);font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px;text-decoration:none;transition:background-color .2s}.btn-github:hover{background-color:var(--bg-card-hover)}.theme-toggle-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}.theme-toggle-btn:hover{color:var(--text-primary)}.nav-dropdown{color:var(--text-secondary);font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:4px;transition:color .2s}.nav-dropdown:hover{color:var(--text-primary)}.main-wrapper{width:100%;max-width:1360px;padding:40px 24px;display:flex;flex-direction:column;gap:80px}.section-title-group{text-align:center;margin-bottom:40px}.section-title{font-size:28px;font-weight:800;margin-bottom:8px}.footer-wrap{width:100%;border-top:1px solid var(--border-color);background-color:var(--bg-dark);padding:60px 24px 30px;margin-top:40px}.footer-inner{max-width:1360px;margin:0 auto 40px;display:grid;grid-template-columns:1fr;gap:40px}.footer-brand p{font-size:13px;color:var(--text-secondary);margin-top:12px;line-height:1.6;max-width:320px}.footer-col-title{font-size:13px;font-weight:700;letter-spacing:1px;color:var(--text-primary);margin-bottom:16px;text-transform:uppercase}.footer-links{list-style:none;display:flex;flex-direction:column;gap:10px}.footer-links a{color:var(--text-muted);text-decoration:none;font-size:13px;transition:color .2s}.footer-bottom{max-width:1360px;margin:0 auto;padding-top:20px;border-top:1px solid var(--border-color);display:flex;justify-content:space-between;font-size:12px;color:var(--text-muted)}html,body{scrollbar-width:none;-ms-overflow-style:none}::-webkit-scrollbar{display:none;width:0px;background:transparent}.hero-header{text-align:center;max-width:800px;margin:0 auto 36px}.hero-header h1{font-size:42px;font-weight:800;letter-spacing:-.8px;margin-bottom:16px}.hero-header p{font-size:16px;color:var(--text-secondary);line-height:1.6;margin-bottom:24px}.badge-row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.pill-badge{background-color:var(--bg-card);border:1px solid var(--border-color);padding:8px 16px;border-radius:20px;font-size:13px;font-weight:500;color:var(--text-secondary);display:flex;align-items:center;gap:8px}.main-workspace-container{width:100%;margin-bottom:48px}.main-converter-card{max-width:760px;margin:0 auto;background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px;transition:max-width .4s cubic-bezier(.4,0,.2,1);box-shadow:0 10px 30px #0000004d}.main-converter-card.expanded{max-width:1040px}.card-tabs{display:flex;gap:8px;border-bottom:1px solid var(--border-color);padding-bottom:16px;margin-bottom:24px}.tab-btn{background:transparent;border:none;color:var(--text-muted);font-size:14px;font-weight:600;padding:10px 20px;border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .2s}.tab-btn.active{background-color:var(--bg-input);color:var(--text-primary)}.dropzone-box{border:2px dashed rgba(255,255,255,.16);border-radius:var(--radius-md);padding:56px 24px;text-align:center;cursor:pointer;transition:border-color .2s,background-color .2s;background-color:#0003;display:flex;flex-direction:column;align-items:center;justify-content:center}.dropzone-box:hover,.dropzone-box.dragover{border-color:var(--primary-blue);background-color:#2563eb0d}.dropzone-icon{width:52px;height:52px;margin-bottom:16px;color:var(--primary-blue)}.dropzone-title{font-size:16px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}.dropzone-subtitle{font-size:13px;color:var(--text-muted);margin-bottom:20px}.btn-choose-file{background-color:var(--primary-blue);color:#fff;border:none;border-radius:var(--radius-sm);padding:10px 24px;font-size:14px;font-weight:600;cursor:pointer;transition:background-color .2s}.btn-choose-file:hover{background-color:var(--primary-hover)}.url-box{display:none;background-color:#0003;border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px}.url-box-title{font-size:13px;font-weight:700;letter-spacing:.5px;color:var(--text-secondary);margin-bottom:14px;text-transform:uppercase}.url-input-row{display:flex;gap:10px;margin-bottom:16px}.url-input-wrap{flex:1;display:flex;align-items:center;background-color:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:0 12px}.url-input-wrap:focus-within{border-color:var(--primary-blue)}.url-icon{color:var(--text-muted);margin-right:8px;flex-shrink:0}.url-input-field{width:100%;background:transparent;border:none;outline:none;color:var(--text-primary);font-size:14px;padding:10px 0}.btn-load-url{background-color:var(--primary-blue);color:#fff;border:none;border-radius:var(--radius-sm);padding:0 24px;font-size:14px;font-weight:600;cursor:pointer;transition:background-color .2s}.btn-load-url:hover{background-color:var(--primary-hover)}.url-note-box{display:flex;align-items:flex-start;gap:10px;background-color:#eab3080d;border:1px solid rgba(234,179,8,.2);border-radius:var(--radius-sm);padding:14px;font-size:12px;color:#eab308;line-height:1.5}.note-icon{color:#eab308;flex-shrink:0;margin-top:2px}.options-view-wrap{display:grid;grid-template-columns:1fr;gap:32px;animation:fadeIn .3s ease-in-out}@media (min-width: 850px){.options-view-wrap{grid-template-columns:1.15fr .85fr}}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.options-col-left,.options-col-right{display:flex;flex-direction:column;gap:20px}.option-section{display:flex;flex-direction:column;gap:10px}.option-section-title{font-size:13px;font-weight:700;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.platform-chips-wrap,.surface-chips-wrap{display:flex;flex-wrap:wrap;gap:8px}.chip-item{background-color:var(--bg-input);border:1px solid var(--border-color);color:var(--text-secondary);padding:8px 16px;border-radius:20px;font-size:12px;font-weight:600;cursor:pointer;transition:all .2s;-webkit-user-select:none;user-select:none}.chip-item:hover{border-color:#2563eb80;color:var(--text-primary)}.platform-chips-wrap .chip-item.active{background-color:#e91e63;border-color:#e91e63;color:#fff;box-shadow:0 4px 12px #e91e634d}.surface-chips-wrap .chip-item.active{background-color:var(--primary-blue);border-color:var(--primary-blue);color:#fff;box-shadow:0 4px 12px #2563eb4d}.stepper-row{display:flex;align-items:center;justify-content:space-between;background-color:var(--bg-input);padding:10px 14px;border-radius:var(--radius-sm);border:1px solid var(--border-color)}.segmented-group{background-color:var(--bg-input);padding:4px;border-radius:var(--radius-sm);display:flex;gap:4px}.segment-item{background:transparent;border:none;color:var(--text-muted);font-size:12px;font-weight:600;padding:6px 12px;border-radius:6px;cursor:pointer;transition:all .2s}.segment-item.active{background-color:var(--primary-blue);color:#fff}.stepper-control{display:flex;align-items:center;gap:12px;background-color:var(--bg-card);padding:4px 10px;border-radius:var(--radius-sm)}.stepper-btn{background:transparent;border:none;color:var(--text-primary);font-size:16px;font-weight:700;cursor:pointer;width:24px;height:24px;display:flex;align-items:center;justify-content:center}.stepper-val{font-size:14px;font-weight:700;min-width:50px;text-align:center}.preset-info-alert{background-color:#2563eb14;border:1px solid rgba(37,99,235,.3);border-radius:var(--radius-sm);padding:14px;display:flex;flex-direction:column;gap:6px}.preset-info-header{display:flex;align-items:center;gap:8px;color:var(--primary-blue);font-size:13px}.preset-info-body{font-size:12px;color:var(--text-secondary);line-height:1.6;padding-left:22px}.switch{position:relative;display:inline-block;width:44px;height:24px}.switch input{opacity:0;width:0;height:0}.slider-round{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:var(--bg-input, #172033);border:1px solid var(--border-color, rgba(255, 255, 255, .12));border-radius:24px;transition:all .3s cubic-bezier(.4,0,.2,1)}.slider-round:before{position:absolute;content:"";height:18px;width:18px;left:2px;bottom:2px;background-color:var(--text-muted, #94a3b8);border-radius:50%;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 2px 4px #0000004d}.switch input:checked+.slider-round{background-color:var(--primary-blue, #2563eb);border-color:#2563eb80;box-shadow:0 0 10px #2563eb66}.switch input:checked+.slider-round:before{transform:translate(20px);background-color:#fff}.file-info-card{background-color:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:14px 16px;display:flex;align-items:center;gap:12px}.file-icon-box{width:38px;height:38px;border-radius:var(--radius-sm);background-color:#2563eb26;color:var(--primary-blue);display:flex;align-items:center;justify-content:center;flex-shrink:0}.file-details{flex:1;overflow:hidden}.file-name{font-size:14px;font-weight:700;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-meta{font-size:12px;color:var(--text-muted);margin-top:2px}.btn-close-file{background:transparent;border:none;color:var(--text-muted);font-size:16px;cursor:pointer;padding:4px 8px;border-radius:4px;transition:color .2s,background-color .2s}.btn-close-file:hover{color:#ef4444;background-color:#ef44441a}.status-summary-box{background-color:#10b9810f;border:1px solid rgba(16,185,129,.2);border-radius:var(--radius-sm);padding:14px;display:flex;flex-direction:column;gap:4px}.status-summary-title{font-size:12px;font-weight:700;color:#10b981;display:flex;align-items:center;gap:6px}.status-summary-text{font-size:13px;color:var(--text-secondary);line-height:1.5}.btn-extract-main{width:100%;background-color:var(--primary-blue);color:#fff;border:none;border-radius:var(--radius-md);padding:14px 24px;font-size:15px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:background-color .2s}.btn-extract-main:hover{background-color:var(--primary-hover)}.btn-extract-main:disabled{opacity:.6;cursor:not-allowed}.clips-grid-container{display:flex;flex-direction:column;gap:10px;max-height:340px;overflow-y:auto;padding-right:4px}.clip-item-card{background-color:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.clip-thumb-box{width:64px;height:40px;border-radius:6px;overflow:hidden;background-color:#000;display:flex;align-items:center;justify-content:center;flex-shrink:0;border:1px solid rgba(255,255,255,.1)}.clip-thumb-img{width:100%;height:100%;object-fit:cover}.clip-thumb-placeholder{font-size:16px;color:var(--text-muted)}.clip-item-info{flex:1;display:flex;flex-direction:column;gap:2px;overflow:hidden}.clip-item-title{font-size:13px;font-weight:700;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.clip-item-sub{font-size:11px;color:var(--text-muted);display:flex;align-items:center;gap:6px;flex-wrap:wrap}.clip-duration-badge{background-color:#2563eb26;color:#60a5fa;padding:2px 6px;border-radius:4px;font-size:10px;font-weight:700}.clip-item-btn{background-color:var(--primary-blue);color:#fff;border:none;border-radius:6px;padding:6px 14px;font-size:12px;font-weight:600;text-decoration:none;cursor:pointer;display:flex;align-items:center;gap:6px;flex-shrink:0;transition:background-color .2s}.clip-item-btn:hover{background-color:var(--primary-hover)}.results-actions{display:flex;gap:8px;flex-wrap:wrap}.action-btn{border:none;border-radius:var(--radius-sm);padding:9px 14px;font-size:12px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px;transition:all .2s}.action-btn-zip{background-color:#2563eb;color:#fff}.action-btn-zip:hover{background-color:#1d4ed8}.action-btn-direct{background-color:#059669;color:#fff}.action-btn-direct:hover{background-color:#047857}.action-btn-share{background-color:#e91e63;color:#fff}.action-btn-share:hover{background-color:#c2185b}.action-btn-clear{background-color:var(--bg-input);color:var(--text-secondary)}.action-btn-clear:hover{background-color:#ffffff1a;color:var(--text-primary)}background-color: var(--bg-input); color: var(--text-secondary); } .section-title-group{text-align:center;max-width:700px;margin:0 auto 36px}.section-title{font-size:28px;font-weight:800;margin-bottom:12px}.section-subtitle{font-size:15px;color:var(--text-secondary)}.diagram-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:36px 24px;display:flex;align-items:center;justify-content:space-around;gap:16px;flex-wrap:wrap;margin-bottom:32px}.flow-step{display:flex;flex-direction:column;align-items:center;text-align:center;gap:12px}.flow-icon-circle{width:56px;height:56px;border-radius:50%;background-color:var(--bg-input);border:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;color:var(--primary-blue)}.flow-title{font-size:15px;font-weight:700}.flow-sub{font-size:12px;color:var(--text-muted)}.flow-arrow{display:flex;flex-direction:column;align-items:center;gap:4px;color:var(--text-muted)}.flow-pill{background-color:var(--bg-input);border:1px solid var(--border-color);padding:4px 10px;border-radius:12px;font-size:11px;font-weight:700;color:var(--primary-blue);letter-spacing:.5px}.cards-grid-3{display:grid;grid-template-columns:1fr;gap:20px;margin-bottom:48px}@media (min-width: 768px){.cards-grid-3{grid-template-columns:repeat(3,1fr)}}.cards-grid-4{display:grid;grid-template-columns:1fr;gap:20px;margin-bottom:48px}@media (min-width: 600px){.cards-grid-4{grid-template-columns:repeat(2,1fr)}}@media (min-width: 1024px){.cards-grid-4{grid-template-columns:repeat(4,1fr)}}.feature-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;display:flex;flex-direction:column;gap:12px}.feature-icon-box{width:40px;height:40px;border-radius:var(--radius-sm);background-color:var(--bg-input);display:flex;align-items:center;justify-content:center;color:var(--primary-blue)}.feature-title{font-size:16px;font-weight:700}.feature-desc{font-size:13px;color:var(--text-secondary);line-height:1.6}.steps-row{display:grid;grid-template-columns:1fr;gap:24px;margin-bottom:48px}@media (min-width: 768px){.steps-row{grid-template-columns:repeat(3,1fr)}}.step-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:28px 20px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}.step-badge-num{width:40px;height:40px;border-radius:50%;background-color:var(--primary-blue);color:#fff;font-size:16px;font-weight:800;display:flex;align-items:center;justify-content:center}.step-card-sub{font-size:13px;color:var(--text-secondary);line-height:1.5}.faq-container{max-width:800px;margin:0 auto 48px;display:flex;flex-direction:column;gap:12px;width:100%}.faq-item{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:border-color .2s}.faq-item.active{border-color:var(--primary-blue)}.faq-question{padding:18px 24px;font-size:15px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:space-between;-webkit-user-select:none;user-select:none}.faq-question svg{transition:transform .2s ease}.faq-item.active .faq-question svg{transform:rotate(180deg)}.faq-answer{padding:0 24px 18px;font-size:14px;color:var(--text-secondary);line-height:1.6;display:none}.faq-item.active .faq-answer{display:block}.footer-wrap{border-top:1px solid var(--border-color);background-color:var(--bg-card);padding:48px 24px 24px;margin-top:60px}.footer-inner{max-width:1100px;margin:0 auto 40px;display:grid;grid-template-columns:1fr;gap:36px}@media (min-width: 768px){.footer-inner{grid-template-columns:2fr 1fr 1fr}}.footer-brand p{font-size:13px;color:var(--text-muted);line-height:1.6;margin-top:12px;max-width:360px}.footer-col-title{font-size:12px;font-weight:700;color:var(--text-secondary);margin-bottom:16px;letter-spacing:.5px}.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.footer-links a{color:var(--text-muted);font-size:13px;text-decoration:none;transition:color .2s}.footer-links a:hover{color:var(--text-primary)}.footer-bottom{max-width:1100px;margin:0 auto;padding-top:24px;border-top:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-muted)}