.tool-header{text-align:center;margin-bottom:40px}.header-badge{display:flex;justify-content:center;gap:12px;margin-bottom:24px;flex-wrap:wrap}.badge{background:linear-gradient(135deg, #667eea 0, #764ba2 100%);color:white;padding:6px 18px;border-radius:40px;font-size:0.75rem;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.tool-header h1{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg, #1e293b, #667eea);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}.tool-header p{color:var(--gray-500);font-size:1rem}.core-stats{display:flex;justify-content:center;gap:24px;margin-bottom:32px;flex-wrap:wrap}.core-stat{background:white;border-radius:60px;padding:16px 28px;display:flex;align-items:center;gap:16px;box-shadow:0 4px 15px rgba(0,0,0,0.05);border:1px solid var(--gray-200)}.core-stat-icon{width:48px;height:48px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#667eea;font-size:1.3rem}.core-stat-info{text-align:left}.core-stat-value{display:block;font-size:1.5rem;font-weight:700;color:var(--gray-800)}.core-stat-label{font-size:0.7rem;color:var(--gray-500)}.feature-tabs{display:flex;gap:16px;margin-bottom:32px;justify-content:center}.feature-tab{background:transparent;border:none;padding:14px 28px;cursor:pointer;transition:all 0.3s;border-radius:20px;text-align:center;min-width:140px}.feature-tab i{font-size:1.3rem;color:var(--gray-400);margin-bottom:8px;display:block}.feature-tab span{display:block;font-weight:600;color:var(--gray-600);margin-bottom:4px}.feature-tab small{font-size:0.65rem;color:var(--gray-400)}.feature-tab.active{background:linear-gradient(135deg, #667eea, #764ba2);box-shadow:0 8px 25px rgba(102,126,234,0.3)}.feature-tab.active i,.feature-tab.active span,.feature-tab.active small{color:white}.upload-area{background:linear-gradient(135deg, #f8fafc, #fff);border:2px dashed var(--gray-300);border-radius:24px;padding:48px;text-align:center;cursor:pointer;transition:all 0.3s;margin-bottom:24px}.upload-area:hover{border-color:#667eea;background:linear-gradient(135deg, #f0f4ff, #fff)}.upload-area i{font-size:48px;color:#667eea;margin-bottom:16px}.upload-area p{font-size:1rem;color:var(--gray-600);margin-bottom:8px}.upload-hint{font-size:0.7rem;color:var(--gray-400);display:block;margin-bottom:16px}.video-info{margin-bottom:24px}.info-card{background:linear-gradient(135deg, #f0f4ff, #fff);border-radius:20px;padding:16px 20px;display:flex;align-items:center;gap:16px;border:1px solid var(--gray-200)}.info-icon{width:56px;height:56px;background:#667eea;border-radius:16px;display:flex;align-items:center;justify-content:center;color:white;font-size:1.5rem}.info-details{flex:1}.info-name{display:block;font-weight:600;color:var(--gray-800);margin-bottom:4px}.info-size,.info-resolution,.info-fps{font-size:0.7rem;color:var(--gray-500);margin-right:16px}.remove-btn{background:transparent;border:none;width:32px;height:32px;border-radius:50%;cursor:pointer;transition:all 0.2s;color:var(--gray-400)}.remove-btn:hover{background:#fee2e2;color:#ef4444}.interpolate-options{background:var(--gray-50);border-radius:20px;padding:20px;margin-bottom:24px}.option-group{margin-bottom:20px}.option-group label{display:block;font-size:0.75rem;font-weight:600;color:var(--gray-500);margin-bottom:12px}.fps-buttons,.algorithm-buttons,.quality-buttons{display:flex;flex-wrap:wrap;gap:12px}.fps-btn,.algo-btn,.quality-btn{background:white;border:1px solid var(--gray-200);padding:8px 20px;border-radius:40px;font-size:0.8rem;cursor:pointer;transition:all 0.2s}.fps-btn.active,.algo-btn.active,.quality-btn.active{background:linear-gradient(135deg, #667eea, #764ba2);border-color:transparent;color:white}.custom-fps-input{margin-top:12px;display:flex;align-items:center;gap:12px}.custom-fps-input input{width:100px;padding:8px 12px;border:1px solid var(--gray-300);border-radius:12px}.preview-section{background:var(--gray-50);border-radius:20px;padding:20px;margin-bottom:24px}.preview-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.preview-container{display:flex;gap:20px;justify-content:center;align-items:center;flex-wrap:wrap}.preview-item{flex:1;text-align:center;min-width:250px}.preview-label{display:block;font-size:0.8rem;color:var(--gray-500);margin-bottom:8px}.preview-video{width:100%;max-width:300px;border-radius:12px;background:#1a1a2e}.preview-arrow{display:flex;flex-direction:column;align-items:center;gap:8px;color:#667eea;font-size:1.2rem}.preview-placeholder{width:100%;max-width:300px;height:180px;background:#1a1a2e;border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--gray-400)}.progress-section{background:linear-gradient(135deg, #f8fafc, #fff);border-radius:20px;padding:24px;margin-bottom:24px;border:1px solid var(--gray-200)}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-weight:500}.progress-bar{height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden;margin-bottom:16px}.progress-fill{height:100%;background:linear-gradient(90deg, #667eea, #764ba2);border-radius:4px;transition:width 0.3s}.progress-stage{font-size:0.8rem;color:var(--gray-500);margin-bottom:8px}.progress-time{font-size:0.7rem;color:var(--gray-400)}.result-section{background:linear-gradient(135deg, #d1fae5, #fff);border-radius:20px;padding:24px;margin-bottom:24px;border:1px solid #a7f3d0}.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;flex-wrap:wrap;gap:16px}.result-header span{font-weight:600;color:#065f46}.result-actions{display:flex;gap:12px}.result-stats{display:flex;gap:24px;flex-wrap:wrap}.stat-item{background:white;padding:12px 20px;border-radius:12px;text-align:center}.stat-label{display:block;font-size:0.7rem;color:var(--gray-500);margin-bottom:4px}.stat-value{display:block;font-size:1.1rem;font-weight:600;color:var(--gray-800)}.settings-card{background:var(--gray-50);border-radius:24px;padding:24px}.settings-card h3{margin-bottom:20px;font-size:1rem;display:flex;align-items:center;gap:8px}.settings-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:24px}.setting-item{display:flex;flex-direction:column;gap:8px}.setting-item label{font-size:0.8rem;font-weight:500;color:var(--gray-700)}.setting-item select,.setting-item input{padding:8px 12px;border:1px solid var(--gray-300);border-radius:12px;background:white}.setting-item small{font-size:0.65rem;color:var(--gray-400)}.settings-note{margin-top:20px;padding:12px;background:#fef3c7;border-radius:12px;font-size:0.7rem;color:#92400e}.help-card{background:var(--gray-50);border-radius:24px;padding:24px}.help-card h3{margin-bottom:20px;font-size:1rem;display:flex;align-items:center;gap:8px}.faq-list{display:flex;flex-direction:column;gap:16px}.faq-item{background:white;border-radius:16px;overflow:hidden}.faq-question{padding:16px 20px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--gray-200)}.faq-question i{color:#667eea;transition:transform 0.3s}.faq-item.open .faq-question i{transform:rotate(90deg)}.faq-answer{padding:0 20px;max-height:0;overflow:hidden;transition:all 0.3s;color:var(--gray-600);font-size:0.85rem;line-height:1.6}.faq-item.open .faq-answer{padding:16px 20px;max-height:200px}.btn-outline{background:transparent;border:1px solid var(--gray-300);padding:10px 20px;border-radius:40px;font-weight:500;cursor:pointer;transition:all 0.3s;display:inline-flex;align-items:center;gap:8px}.btn-outline:hover{background:var(--gray-100);border-color:#667eea;color:#667eea}.ad-section{margin:20px 0 40px}.ad-banner{background:linear-gradient(135deg, #f5f5f5, #fff);border:1px solid var(--gray-200);border-radius:16px;padding:20px;text-align:center;position:relative}.ad-label{position:absolute;top:8px;right:12px;font-size:0.6rem;color:var(--gray-400)}@media (max-width:900px){.settings-grid{grid-template-columns:1fr}.preview-container{flex-direction:column}.preview-arrow{transform:rotate(90deg)}.result-header{flex-direction:column;align-items:flex-start}.fps-buttons,.algorithm-buttons,.quality-buttons{justify-content:center}}@media (max-width:480px){.core-stats{gap:12px}.core-stat{padding:12px 16px}.feature-tab{padding:10px 16px;min-width:auto}}