:root{--accent: #4F46E5;--accent-hover: #4338CA;--accent-light: #EEF2FF;--bg-primary: #FFFFFF;--bg-secondary: #F3F4F6;--bg-tertiary: #E5E7EB;--border: #E5E7EB;--success: #059669;--success-light: #ECFDF5;--text-primary: #111827;--text-secondary: #6B7280;--text-tertiary: #9CA3AF}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh}.app{display:flex;flex-direction:column;min-height:100vh}.nav{position:relative;display:flex;justify-content:space-between;align-items:center;height:64px;padding:0 48px}.logo{font-size:20px;font-weight:700;color:var(--text-primary);text-decoration:none;cursor:pointer}.nav-links{display:flex;gap:32px;align-items:center}.nav-link{color:var(--text-secondary);text-decoration:none;font-size:14px;transition:color .15s}.nav-link:hover{color:var(--text-primary)}.nav-donate{display:flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid var(--border);border-radius:6px;font-size:13px;font-weight:500;color:var(--text-secondary);text-decoration:none;transition:all .15s}.nav-donate:hover{border-color:var(--accent);color:var(--accent)}.hero{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:24px;padding:0 48px}.heading{font-size:40px;font-weight:700;color:var(--text-primary)}.subheading{font-size:18px;color:var(--text-secondary)}.helper-text{font-size:13px;color:var(--text-tertiary)}.error-text{font-size:13px;color:#dc2626}.input-bar{display:flex;align-items:center;width:720px;max-width:100%;height:56px;background:var(--bg-primary);border:1px solid var(--border);border-radius:6px;padding:0 4px 0 16px;gap:12px}.input-bar.compact{width:720px;height:52px}.play-icon{flex-shrink:0}.input-bar input{flex:1;border:none;outline:none;font-family:Inter,sans-serif;font-size:15px;color:var(--text-primary);background:transparent}.input-bar input::placeholder{color:var(--text-tertiary)}.btn-process{height:44px;padding:0 24px;background:var(--accent);color:#fff;border:none;border-radius:6px;font-family:Inter,sans-serif;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;transition:background .15s}.btn-process:hover:not(:disabled){background:var(--accent-hover)}.btn-process:disabled{opacity:.5;cursor:not-allowed}.content{flex:1;display:flex;flex-direction:column;align-items:center;gap:28px;padding:32px 48px}.media-card{display:flex;gap:20px;width:720px;max-width:100%;padding:16px;border:1px solid var(--border);border-radius:6px}.thumb-wrapper{position:relative;flex-shrink:0;width:240px;height:135px;border-radius:4px;overflow:hidden}.thumb{width:100%;height:100%;object-fit:cover}.duration-badge{position:absolute;bottom:8px;right:8px;background:#111827e6;color:#fff;font-size:11px;font-weight:600;padding:4px 8px;border-radius:4px}.video-info{display:flex;flex-direction:column;gap:8px;justify-content:center;min-width:0}.video-title{font-size:16px;font-weight:600;line-height:1.4;color:var(--text-primary)}.channel-name{font-size:13px;color:var(--text-secondary)}.meta-row{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--text-tertiary)}.dot{margin:0 4px}.format-section{width:720px;max-width:100%;border:1px solid var(--border);border-radius:6px;overflow:hidden}.tabs{display:flex;border-bottom:1px solid var(--border)}.tab{display:flex;align-items:center;gap:8px;padding:12px 24px;border:none;background:none;font-family:Inter,sans-serif;font-size:14px;color:var(--text-tertiary);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all .15s}.tab.active{color:var(--accent);font-weight:600;border-bottom-color:var(--accent)}.tab:hover:not(.active){color:var(--text-secondary)}.list-header{display:flex;align-items:center;padding:12px 16px;background:var(--bg-secondary);font-size:12px;font-weight:600;color:var(--text-secondary)}.format-row{display:flex;flex-direction:column;padding:0;border-bottom:1px solid var(--border)}.format-row:last-child{border-bottom:none}.format-row .row-main{display:flex;align-items:center;padding:14px 16px}.format-row.row-active{background:var(--accent-light);border-radius:6px}.inline-status{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--accent)}.spinner{width:16px;height:16px;border:2px solid var(--bg-tertiary);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.inline-pct{font-variant-numeric:tabular-nums}.inline-progress{padding:10px 16px 14px;display:flex;flex-direction:column;gap:6px}.col-quality{width:140px;display:flex;gap:8px;align-items:center}.col-format{width:100px;font-size:13px;color:var(--text-primary)}.col-size{flex:1;font-size:13px;color:var(--text-secondary)}.col-action{width:120px;display:flex;justify-content:flex-end}.quality-badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;background:var(--bg-secondary);color:var(--text-primary)}.quality-badge.badge-accent{background:var(--accent-light);color:var(--accent);font-weight:700}.best-badge{display:inline-block;padding:2px 6px;border-radius:4px;font-size:10px;font-weight:700;background:var(--success-light);color:var(--success)}.btn-dl{display:flex;align-items:center;gap:6px;padding:8px 20px;border-radius:6px;font-family:Inter,sans-serif;font-size:13px;font-weight:500;cursor:pointer;transition:all .15s;background:var(--bg-primary);color:var(--text-secondary);border:1px solid var(--border)}.btn-dl:hover:not(:disabled){border-color:var(--text-tertiary);color:var(--text-primary)}.btn-dl.primary{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:600}.btn-dl.primary:hover:not(:disabled){background:var(--accent-hover);border-color:var(--accent-hover)}.btn-dl:disabled{opacity:.4;cursor:not-allowed}.progress-section{width:720px;max-width:100%;display:flex;flex-direction:column;gap:8px}.progress-label{display:flex;justify-content:space-between;align-items:center}.prog-text{font-size:13px;font-weight:500;color:var(--text-primary)}.prog-pct{font-size:13px;font-weight:600;color:var(--accent)}.progress-bar-bg{width:100%;height:4px;background:var(--bg-tertiary);border-radius:2px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--accent);border-radius:2px;transition:width .3s ease}.progress-meta{display:flex;gap:16px;font-size:12px;color:var(--text-tertiary)}.btn-download-ready{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:8px;padding:12px 24px;background:var(--success);color:#fff;border:none;border-radius:6px;font-family:Inter,sans-serif;font-size:14px;font-weight:600;text-decoration:none;cursor:pointer;transition:background .15s}.btn-download-ready:hover{background:#047857}.section{padding:80px 48px}.section-alt{background:var(--bg-secondary)}.section-inner{max-width:720px;margin:0 auto}.section-title{font-size:24px;font-weight:700;color:var(--text-primary);margin-bottom:40px;text-align:center}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.step{text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}.step-num{width:40px;height:40px;border-radius:50%;background:var(--accent-light);color:var(--accent);font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center}.step h3{font-size:15px;font-weight:600;color:var(--text-primary)}.step p{font-size:13px;color:var(--text-secondary);line-height:1.6}.faq-list{display:flex;flex-direction:column;gap:0}.faq-item{border-bottom:1px solid var(--border);padding:0}.faq-item:first-child{border-top:1px solid var(--border)}.faq-item summary{padding:16px 0;font-size:14px;font-weight:600;color:var(--text-primary);cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";font-size:18px;font-weight:400;color:var(--text-tertiary);transition:transform .2s}.faq-item[open] summary:after{content:"−"}.faq-item p{padding:0 0 16px;font-size:13px;color:var(--text-secondary);line-height:1.7}.about-content{display:flex;flex-direction:column;gap:24px;font-size:14px;color:var(--text-secondary);line-height:1.7}.disclaimer-box{background:var(--bg-secondary);border:1px solid var(--border);border-radius:6px;padding:24px}.disclaimer-box h4{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.disclaimer-box ul{list-style:none;display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.disclaimer-box li{font-size:13px;color:var(--text-secondary);line-height:1.6;padding-left:16px;position:relative}.disclaimer-box li:before{content:"";position:absolute;left:0;top:8px;width:4px;height:4px;background:var(--text-tertiary);border-radius:50%}.disclaimer-accept{font-size:12px;font-style:italic;color:var(--text-tertiary)}.footer{display:flex;justify-content:center;align-items:center;padding:20px 48px;font-size:12px;color:var(--text-tertiary);border-top:1px solid var(--border)}.menu-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--text-primary);padding:4px}@media (max-width: 640px){.nav{padding:0 16px;height:56px}.menu-toggle{display:block}.nav-links{display:none;position:absolute;top:56px;left:0;right:0;background:var(--bg-primary);border-bottom:1px solid var(--border);flex-direction:column;padding:12px 16px;gap:0;z-index:100}.nav-links.open{display:flex}.nav-link{display:block;padding:12px 0;font-size:15px;border-bottom:1px solid var(--border)}.nav-donate{margin-top:8px;justify-content:center}.hero{padding:0 16px;gap:12px}.heading{font-size:28px;text-align:center;line-height:1.2}.subheading{font-size:16px;text-align:center;line-height:1.5}.helper-text{font-size:12px}.input-bar{width:100%;flex-direction:column;height:auto;padding:0;border:none;gap:12px;background:transparent}.input-bar.compact{width:100%;height:auto}.input-bar .play-icon{display:none}.input-bar input{width:100%;height:48px;border:1px solid var(--border);border-radius:6px;padding:0 14px;font-size:14px;background:var(--bg-primary)}.btn-process{width:100%;height:48px;font-size:15px;border-radius:6px}.content{padding:20px 16px;gap:20px}.media-card{flex-direction:column;width:100%;gap:12px;padding:12px}.thumb-wrapper{width:100%;height:190px}.video-title{font-size:15px}.channel-name{font-size:12px}.meta-row{font-size:11px}.format-section{width:100%}.tabs{display:flex}.tab{flex:1;justify-content:center;padding:10px 20px;font-size:13px;gap:6px}.list-header{display:none}.format-row{padding:0}.format-row .row-main{padding:12px;justify-content:space-between;align-items:center}.col-quality{width:auto;flex-shrink:0}.col-format,.col-size{display:none}.format-row .row-main .col-quality:after{content:attr(data-meta);font-size:12px;font-weight:400;color:var(--text-secondary);margin-left:8px}.col-action{width:auto}.btn-dl{padding:8px 16px;font-size:12px;gap:6px}.progress-section{width:100%}.prog-text,.prog-pct{font-size:12px}.section{padding:48px 16px}.section-title{font-size:20px;margin-bottom:28px}.steps{grid-template-columns:1fr;gap:24px}.disclaimer-box{padding:16px}.footer{padding:16px;font-size:11px}}