.tool-header{text-align:center;margin-bottom:32px}.header-badge{display:flex;justify-content:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}.badge{background:linear-gradient(135deg, #10b981, #059669);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, #10b981);-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:14px 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, #d1fae5, #a7f3d0);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#10b981;font-size:1.3rem}.core-stat-value{display:block;font-size:1.3rem;font-weight:700;color:var(--gray-800)}.core-stat-label{font-size:0.7rem;color:var(--gray-500)}.watermark-tabs{display:flex;gap:16px;margin-bottom:28px;justify-content:center}.watermark-tab{background:transparent;border:none;padding:14px 28px;cursor:pointer;transition:all 0.3s;border-radius:20px;text-align:center;min-width:150px}.watermark-tab i{font-size:1.3rem;color:var(--gray-400);margin-bottom:8px;display:block}.watermark-tab span{display:block;font-weight:600;color:var(--gray-600);margin-bottom:4px}.watermark-tab small{font-size:0.65rem;color:var(--gray-400)}.watermark-tab.active{background:linear-gradient(135deg, #10b981, #059669);box-shadow:0 8px 25px rgba(16,185,129,0.3)}.watermark-tab.active i,.watermark-tab.active span,.watermark-tab.active small{color:white}.upload-area{border:2px dashed var(--gray-300);border-radius:32px;padding:50px 30px;text-align:center;cursor:pointer;transition:all 0.3s;background:var(--gray-50);margin-bottom:24px}.upload-area:hover{border-color:#10b981;background:#f0fdf4}.upload-area i{font-size:56px;color:#10b981;margin-bottom:16px}.upload-hint{display:block;font-size:0.7rem;color:var(--gray-400);margin:12px 0}.ffmpeg-loading{text-align:center;padding:40px;background:var(--gray-50);border-radius:24px;margin-bottom:24px}.loading-spinner{width:50px;height:50px;border:3px solid var(--gray-200);border-top-color:#10b981;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 16px}.loading-progress{width:100%;max-width:300px;height:6px;background:var(--gray-200);border-radius:3px;margin:16px auto 0;overflow:hidden}.loading-progress-bar{width:0%;height:100%;background:#10b981;transition:width 0.3s}@keyframes spin{to{transform:rotate(360deg)}}.video-preview-area{background:var(--gray-50);border-radius:24px;padding:20px;margin-bottom:24px}.video-container{position:relative;border-radius:16px;overflow:hidden;background:#000}.source-video{width:100%;max-height:400px;display:block}.selection-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.3);cursor:crosshair}.selection-box{position:absolute;border:2px solid #10b981;background:rgba(16,185,129,0.2);cursor:move}.selection-tools{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:12px;background:rgba(0,0,0,0.8);padding:12px 20px;border-radius:50px;z-index:10;flex-wrap:wrap;justify-content:center}.coord-input{display:flex;gap:8px;color:white;font-size:0.75rem}.coord-input span{display:inline-flex;align-items:center;gap:4px}.coord-input input{width:60px;padding:4px 6px;border-radius:6px;border:none;background:rgba(255,255,255,0.9);text-align:center}.video-info{display:flex;gap:20px;margin-top:16px;padding:12px 16px;background:white;border-radius:16px;font-size:0.8rem;color:var(--gray-600);flex-wrap:wrap}.process-options{background:var(--gray-50);border-radius:20px;padding:20px;margin-bottom:24px;display:flex;flex-wrap:wrap;gap:24px;align-items:center}.option-group{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.option-group label{font-size:0.8rem;font-weight:500;color:var(--gray-600);display:inline-flex;align-items:center;gap:6px}.position-buttons{display:flex;gap:8px;flex-wrap:wrap}.position-btn{background:white;border:1px solid var(--gray-200);padding:6px 14px;border-radius:30px;font-size:0.75rem;cursor:pointer;transition:all 0.2s}.position-btn.active{background:#10b981;border-color:#10b981;color:white}#boxColorGroup{background:white;padding:8px 16px;border-radius:40px}#boxColor{width:40px;height:32px;border:1px solid var(--gray-300);border-radius:8px;cursor:pointer}#boxOpacity{width:100px}.process-btn{background:linear-gradient(135deg, #10b981, #059669);padding:10px 28px;border-radius:40px;margin-left:auto;border:none;color:white;font-weight:600;cursor:pointer;transition:all 0.3s}.process-btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(16,185,129,0.3)}.progress-area{background:white;border-radius:20px;padding:24px;margin-bottom:24px;border:1px solid var(--gray-200)}.progress-header{display:flex;justify-content:space-between;margin-bottom:12px;font-size:0.85rem;color:var(--gray-600)}.progress-bar{height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg, #10b981, #059669);border-radius:4px;width:0%;transition:width 0.3s}.progress-status{margin-top:12px;font-size:0.75rem;color:var(--gray-500);text-align:center}.result-area{background:white;border-radius:24px;overflow:hidden;border:1px solid var(--gray-200);margin-bottom:24px}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.result-title{display:flex;align-items:center;gap:10px;font-weight:600;color:#10b981}.result-actions{display:flex;gap:12px}.result-compare{display:grid;grid-template-columns:1fr auto 1fr;gap:24px;padding:24px;align-items:center}.compare-item{text-align:center}.compare-label{font-weight:600;margin-bottom:12px}.ai-badge{background:linear-gradient(135deg, #10b981, #059669);color:white;padding:2px 8px;border-radius:20px;font-size:0.6rem;margin-left:8px}.compare-video{width:100%;max-height:250px;border-radius:16px;background:#000}.compare-arrow{font-size:2rem;color:#10b981}.info-section{background:var(--gray-50);border-radius:20px;padding:20px}.info-header{display:flex;align-items:center;gap:10px;font-weight:600;margin-bottom:16px;color:var(--gray-700)}.info-steps{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:16px}.step{flex:1;text-align:center;padding:12px;background:white;border-radius:16px;font-size:0.8rem}.step i{display:block;font-size:1.2rem;margin-bottom:6px;color:#10b981}.info-note{background:#fef3c7;border-radius:12px;padding:12px;font-size:0.75rem;color:#92400e}.btn-primary-sm{background:#10b981;color:white;border:none;padding:8px 20px;border-radius:30px;cursor:pointer;font-size:0.8rem;transition:all 0.2s}.btn-primary-sm:hover{background:#059669}.btn-secondary-sm{background:var(--gray-200);border:none;padding:8px 20px;border-radius:30px;cursor:pointer;font-size:0.8rem;transition:all 0.2s}.btn-secondary-sm:hover{background:var(--gray-300)}@media (max-width:900px){.result-compare{grid-template-columns:1fr}.compare-arrow{transform:rotate(90deg)}.info-steps{flex-direction:column}.process-options{flex-direction:column;align-items:stretch}.process-btn{margin-left:0}.watermark-tab{min-width:auto;padding:10px 16px}.selection-tools{flex-direction:column;align-items:center;width:90%;padding:12px}.coord-input{flex-wrap:wrap;justify-content:center}}@media (max-width:480px){.core-stats{gap:12px}.core-stat{padding:10px 16px}.result-header{flex-direction:column;gap:12px}.position-buttons{justify-content:center}.video-info{flex-direction:column;gap:8px}}