.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, #8b5cf6, #6366f1);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, #8b5cf6);-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, #ede9fe, #e0e7ff);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#8b5cf6;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)}.mode-tabs{display:flex;gap:16px;margin-bottom:32px;justify-content:center}.mode-tab{background:transparent;border:none;padding:14px 28px;cursor:pointer;transition:all 0.3s;border-radius:20px;text-align:center;min-width:140px}.mode-tab i{font-size:1.3rem;color:var(--gray-400);margin-bottom:8px;display:block}.mode-tab span{display:block;font-weight:600;color:var(--gray-600);margin-bottom:4px}.mode-tab small{font-size:0.65rem;color:var(--gray-400)}.mode-tab.active{background:linear-gradient(135deg, #8b5cf6, #6366f1);box-shadow:0 8px 25px rgba(139,92,246,0.3)}.mode-tab.active i,.mode-tab.active span,.mode-tab.active small{color:white}.upload-section{margin-bottom:24px}.upload-area{background:linear-gradient(135deg, #f8fafc, #fff);border:2px dashed var(--gray-300);border-radius:32px;padding:48px;text-align:center;cursor:pointer;transition:all 0.3s}.upload-area:hover{border-color:#8b5cf6;background:linear-gradient(135deg, #ede9fe, #fff)}.upload-area i{font-size:4rem;color:#8b5cf6;margin-bottom:20px}.upload-text h3{font-size:1.2rem;margin-bottom:8px;color:var(--gray-700)}.upload-text p{font-size:0.8rem;color:var(--gray-500);margin-bottom:4px}.upload-limit{font-size:0.7rem;color:var(--gray-400)}#selectFileBtn{margin-top:20px}.file-info{display:flex;align-items:center;gap:20px;background:white;border-radius:20px;padding:16px 24px;margin-top:20px;border:1px solid var(--gray-200);animation:fadeIn 0.3s ease}.file-icon{width:56px;height:56px;background:linear-gradient(135deg, #ede9fe, #e0e7ff);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#8b5cf6}.file-details{flex:1}.file-name{font-weight:600;margin-bottom:4px}.file-meta{display:flex;gap:16px;font-size:0.7rem;color:var(--gray-500)}.file-progress{width:200px}.progress-bar{height:6px;background:var(--gray-200);border-radius:10px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg, #8b5cf6, #6366f1);border-radius:10px;transition:width 0.3s}.progress-text{font-size:0.7rem;color:var(--gray-500);margin-top:6px;text-align:center}.remove-btn{background:transparent;border:none;width:32px;height:32px;border-radius:50%;cursor:pointer;color:var(--gray-400);transition:all 0.2s}.remove-btn:hover{background:var(--gray-100);color:#ef4444}.advanced-options{background:var(--gray-50);border-radius:20px;margin-bottom:24px;overflow:hidden}.options-header{display:flex;align-items:center;gap:12px;padding:16px 20px;cursor:pointer;user-select:none;font-weight:500;color:var(--gray-700)}.options-header i:first-child{color:#8b5cf6}#optionsToggle{margin-left:auto;transition:transform 0.3s}.options-header.open #optionsToggle{transform:rotate(180deg)}.options-content{padding:0 20px 20px 20px;border-top:1px solid var(--gray-200)}.option-group{margin-bottom:16px}.option-group label{display:block;font-size:0.75rem;font-weight:600;color:var(--gray-500);margin-bottom:10px}.algo-buttons{display:flex;gap:12px;flex-wrap:wrap}.algo-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}.algo-btn.active{background:#8b5cf6;border-color:#8b5cf6;color:white}.output-select{padding:10px 16px;border:1px solid var(--gray-200);border-radius:40px;width:200px;background:white}.result-area{animation:fadeIn 0.4s ease}.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--gray-200)}.result-title{display:flex;align-items:center;gap:10px;font-size:1rem;font-weight:600;color:#10b981}.result-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px}.result-card{background:white;border-radius:24px;padding:24px;border:1px solid var(--gray-200);transition:all 0.3s}.result-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,0,0,0.08)}.vocal-card{border-left:4px solid #10b981}.accompaniment-card{border-left:4px solid #f59e0b}.card-icon{width:56px;height:56px;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}.vocal-card .card-icon{background:linear-gradient(135deg, #d1fae5, #a7f3d0);color:#10b981}.accompaniment-card .card-icon{background:linear-gradient(135deg, #fef3c7, #fde68a);color:#f59e0b}.card-info h3{font-size:1.1rem;margin-bottom:4px}.card-info p{font-size:0.7rem;color:var(--gray-500)}.card-actions{display:flex;gap:12px;margin-top:20px}.card-actions button{flex:1;padding:10px;border:none;border-radius:40px;cursor:pointer;font-size:0.8rem;transition:all 0.2s}.play-result{background:var(--gray-100);color:var(--gray-700)}.play-result:hover{background:#8b5cf6;color:white}.download-result{background:#8b5cf6;color:white}.download-result:hover{background:#7c3aed;transform:translateY(-2px)}.info-footer{margin-top:32px;background:var(--gray-50);border-radius:28px;padding:24px}.info-footer-header{display:flex;align-items:center;gap:10px;margin-bottom:20px;font-weight:600;color:var(--gray-700)}.info-footer-steps{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.step-item{display:flex;gap:14px;align-items:flex-start}.step-number{width:36px;height:36px;background:linear-gradient(135deg, #8b5cf6, #6366f1);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.step-content h4{font-size:0.9rem;margin-bottom:4px}.step-content p{font-size:0.75rem;color:var(--gray-500)}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.7);backdrop-filter:blur(4px);z-index:1000;display:flex;align-items:center;justify-content:center}.modal-content{background:white;border-radius:28px;width:90%;max-width:500px;overflow:hidden;animation:slideUp 0.3s ease}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.modal-title{font-weight:600}.modal-close{background:transparent;border:none;font-size:1.5rem;cursor:pointer;color:var(--gray-500)}.modal-body{padding:24px}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.mode-tabs{flex-wrap:wrap}.result-cards{grid-template-columns:1fr}.info-footer-steps{grid-template-columns:repeat(2, 1fr)}.file-info{flex-wrap:wrap}.file-progress{width:100%}}@media (max-width:480px){.info-footer-steps{grid-template-columns:1fr}.core-stats{gap:12px}.core-stat{padding:12px 20px}.upload-area{padding:32px 20px}}