:root{--font-sans: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--bg-main: #f1f5f9;--bg-card: rgba(255, 255, 255, .75);--border-card: rgba(0, 0, 0, .08);--border-focus: rgba(79, 70, 229, .4);--primary: #4f46e5;--primary-hover: #4338ca;--primary-glow: rgba(79, 70, 229, .15);--success: #059669;--success-glow: rgba(5, 150, 105, .15);--danger: #dc2626;--danger-hover: #b91c1c;--text-primary: #0f172a;--text-secondary: #334155;--text-muted: #64748b;--transition-smooth: all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-main);background-image:radial-gradient(circle at 10% 20%,rgba(79,70,229,.06) 0%,transparent 40%),radial-gradient(circle at 90% 80%,rgba(5,150,105,.05) 0%,transparent 40%);background-attachment:fixed;color:var(--text-primary);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased}.app-container{max-width:900px;margin:0 auto;padding:3rem 1.5rem;display:flex;flex-direction:column;gap:2.5rem}.app-header{text-align:center;margin-bottom:1rem}.logo-area{display:flex;align-items:center;justify-content:center;gap:.75rem;margin-bottom:.5rem}.logo-icon{width:48px;height:48px;background:linear-gradient(135deg,var(--primary),#8b5cf6);border-radius:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px #4f46e54d}.logo-icon svg{fill:#fff;width:24px;height:24px}.app-header h1{font-size:2.7rem;font-weight:800;letter-spacing:-.03em;background:linear-gradient(to right,#0f172a,#4f46e5);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.app-header p{color:var(--text-secondary);font-size:1.1rem;font-weight:400}.glass-card{background:var(--bg-card);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-card);border-radius:20px;padding:2rem;box-shadow:0 10px 30px #0000000a,0 1px 3px #00000005;transition:var(--transition-smooth)}.glass-card:hover{border-color:#0000001f;box-shadow:0 12px 35px #0000000f}.input-section{display:flex;flex-direction:column;gap:1.25rem}.input-group{display:flex;position:relative;background:#ffffffe6;border:1px solid rgba(0,0,0,.1);border-radius:14px;padding:.5rem;transition:var(--transition-smooth)}.input-group:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-glow)}.input-icon-left{display:flex;align-items:center;padding:0 .75rem;color:var(--text-muted)}.video-url-input{flex:1;background:transparent;border:none;color:var(--text-primary);font-family:var(--font-sans);font-size:1.05rem;padding:.75rem .5rem;outline:none;width:100%}.video-url-input::placeholder{color:#94a3b8}.primary-btn{background:linear-gradient(135deg,var(--primary) 0%,#6366f1 100%);color:#fff;border:none;font-family:var(--font-sans);font-weight:600;font-size:.95rem;padding:.75rem 1.75rem;border-radius:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.5rem;box-shadow:0 4px 15px #4f46e540;transition:var(--transition-smooth)}.primary-btn:hover:not(:disabled){opacity:.95;transform:translateY(-1px);box-shadow:0 6px 20px #4f46e566}.primary-btn:active:not(:disabled){transform:translateY(1px)}.primary-btn:disabled{background:#cbd5e1;color:#94a3b8;cursor:not-allowed;box-shadow:none;opacity:.7}.video-card{display:flex;flex-direction:column;gap:1.5rem}.thumbnail-container{width:100%;position:relative;border-radius:12px;overflow:hidden;box-shadow:0 8px 25px #0000001a;aspect-ratio:16 / 9;background:#020617}.thumbnail-img{width:100%;height:100%;object-fit:cover}.duration-badge{position:absolute;bottom:8px;right:8px;background:#000000bf;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);color:#fff;padding:2px 6px;border-radius:4px;font-size:.75rem;font-weight:600}.video-info-details{flex:2 1 320px;display:flex;flex-direction:column;gap:1rem;min-width:280px}.uploader-badge{display:inline-flex;align-items:center;align-self:flex-start;background:#4f46e514;color:var(--primary);border:1px solid rgba(79,70,229,.2);padding:3px 10px;border-radius:99px;font-size:.8rem;font-weight:600;text-transform:uppercase}.video-title{font-size:1.4rem;font-weight:700;line-height:1.3}.video-description{font-size:.9rem;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}.format-selection{margin-top:auto;display:flex;flex-direction:column;gap:.75rem}.format-label{font-size:.85rem;font-weight:600;color:var(--text-muted)}.formats-list{display:flex;flex-direction:column;gap:.75rem;width:100%}.format-item{display:flex;flex-direction:column;background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:10px;padding:.75rem 1rem;transition:var(--transition-smooth)}.format-item.active-download{border-color:var(--primary);box-shadow:0 4px 20px #4f46e526;background:#4f46e505}.inline-progress-block{width:100%;animation:slideDown .3s ease-out forwards}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.format-item:hover{border-color:#4f46e54d;box-shadow:0 4px 15px #00000008}.format-details{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem 1rem}.format-resolution{font-weight:700;color:var(--text-primary);font-size:1.05rem}.format-ext{background:#0000000d;color:var(--text-secondary);font-size:.75rem;padding:2px 6px;border-radius:4px;font-weight:600}.format-size{color:var(--text-muted);font-size:.85rem}.format-note{color:var(--success);font-size:.8rem;font-weight:500}.format-download-btn{padding:.5rem 1rem;font-size:.85rem;border-radius:8px;flex-shrink:0}.progress-card{display:flex;flex-direction:column;gap:1.25rem}.progress-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.progress-title{font-weight:600;font-size:1.1rem}.progress-meta{display:flex;gap:1rem;font-size:.85rem;color:var(--text-secondary)}.progress-track{height:8px;background:#0000000d;border-radius:99px;overflow:hidden;position:relative}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary) 0%,var(--success) 100%);border-radius:99px;transition:width .3s ease;box-shadow:0 0 10px #4f46e533}.progress-fill.merging-animation{background-image:linear-gradient(45deg,rgba(255,255,255,.15) 25%,transparent 25%,transparent 50%,rgba(255,255,255,.15) 50%,rgba(255,255,255,.15) 75%,transparent 75%,transparent);background-size:1rem 1rem;background-color:var(--primary);animation:progress-stripes 1s linear infinite}@keyframes progress-stripes{0%{background-position:1rem 0}to{background-position:0 0}}.progress-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;background:#00000005;padding:1rem;border-radius:12px;text-align:center}.stat-item{display:flex;flex-direction:column;gap:.25rem}.stat-label{font-size:.8rem;color:var(--text-muted)}.stat-value{font-weight:700;font-size:1.1rem;color:var(--text-primary)}.danger-btn{background:#dc262614;color:var(--danger);border:1px solid rgba(220,38,38,.15);padding:.65rem 1.25rem;border-radius:8px;font-family:var(--font-sans);font-weight:600;cursor:pointer;transition:var(--transition-smooth)}.danger-btn:hover{background:var(--danger);color:#fff}.logs-section{border-top:1px solid var(--border-card);padding-top:1.25rem;margin-top:.5rem}.logs-toggle{background:transparent;border:none;color:var(--text-secondary);font-family:var(--font-sans);font-weight:600;font-size:.85rem;cursor:pointer;display:flex;align-items:center;gap:.35rem}.logs-terminal{margin-top:.75rem;background:#0f172a;border:1px solid rgba(0,0,0,.15);border-radius:8px;padding:1rem;font-family:Courier New,Courier,monospace;font-size:.8rem;color:#34d399;max-height:180px;overflow-y:auto;white-space:pre-wrap;word-break:break-all}.history-section{display:flex;flex-direction:column;gap:1.25rem}.history-title-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.history-title-row h2{font-size:1.4rem;font-weight:700}.secondary-btn{background:#fff;border:1px solid rgba(0,0,0,.1);color:var(--text-primary);font-family:var(--font-sans);font-weight:500;font-size:.85rem;padding:.5rem 1rem;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:.4rem;transition:var(--transition-smooth)}.secondary-btn:hover{background:#00000008;border-color:#00000026}.history-list{display:flex;flex-direction:column;gap:.75rem;max-height:400px;overflow-y:auto;padding-right:.25rem}.history-item{background:#ffffff80;border:1px solid var(--border-card);border-radius:12px;padding:1rem;display:flex;justify-content:space-between;align-items:center;gap:1.5rem;transition:var(--transition-smooth)}.history-item:hover{background:#fff;border-color:#00000026}.history-info{display:flex;flex-direction:column;gap:.25rem;flex:1}.history-video-title{font-weight:600;font-size:.95rem}.history-video-meta{font-size:.8rem;color:var(--text-muted);display:flex;flex-wrap:wrap;gap:.5rem .75rem}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background-color:var(--success);box-shadow:0 0 6px var(--success-glow)}.empty-history{text-align:center;color:var(--text-muted);padding:3rem 0;font-size:.95rem;border:1px dashed rgba(0,0,0,.08);border-radius:12px}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#00000026;border-radius:99px}::-webkit-scrollbar-thumb:hover{background:#00000040}@keyframes spin{to{transform:rotate(360deg)}}.spinner{animation:spin 1s linear infinite;width:18px;height:18px}@media (max-width: 768px){.app-container{padding:1.5rem 1rem;gap:1.75rem}.glass-card{padding:1.5rem}.app-header h1{font-size:2.2rem}}@media (max-width: 480px){.download-control-row{flex-direction:column}.download-control-row .primary-btn{width:100%;padding:.85rem}.input-group{flex-direction:column;gap:.5rem;background:transparent;border:none;padding:0}.video-url-input{background:#fff;border:1px solid rgba(0,0,0,.1);border-radius:10px;padding:.75rem}.input-group .primary-btn{width:100%;padding:.85rem}.progress-stats{grid-template-columns:1fr;gap:.75rem}}