.bg-remover-theme-dark{--bg-main:#f4f7f6;--bg-card:#fff;--bg-input:#edf1f1;--border-color:#dbe3e4;--border-highlight:#46757e;--text-primary:#2c3e41;--text-muted:#627578;--accent-color:#46757e;--accent-hover:#355b62;--banner-bg:#edf5f5;--banner-border:#cbdad9;background-color:var(--bg-main);color:var(--text-primary);padding:30px;border-radius:16px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;max-width:1100px;margin:40px auto;box-shadow:0 10px 30px rgba(70,117,126,.08)}.bg-remover-title{font-size:1.5rem;font-weight:800;color:var(--accent-color);margin-top:0;margin-bottom:24px;letter-spacing:-.5px;line-height:1.3}.bg-remover-banner{display:flex;align-items:center;gap:15px;background-color:var(--banner-bg);border:1px solid var(--banner-border);border-radius:10px;padding:14px 18px;margin-bottom:30px}.banner-icon{font-size:1.3rem}.banner-text{margin:0;font-size:.85rem;line-height:1.6;color:var(--text-primary);opacity:.9}.bg-remover-workspace{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:30px}.bg-remover-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:24px;display:flex;flex-direction:column;box-shadow:0 4px 12px rgba(0,0,0,.02)}.card-title{font-size:1.1rem;font-weight:700;margin-top:0;margin-bottom:18px;color:var(--accent-color);letter-spacing:.3px;border-left:3px solid var(--accent-color);padding-left:10px}.drop-area{border:2px dashed var(--border-color);background-color:#fafbfc;border-radius:10px;flex-grow:1;min-height:320px;display:flex;align-items:center;justify-content:center;position:relative;transition:all .25s ease;cursor:pointer}.drop-area:hover,.drop-area.highlight{border-color:var(--border-highlight);background-color:rgba(70,117,126,.03)}.drop-inner-content{text-align:center;padding:20px}.upload-icon{font-size:2.8rem;color:var(--accent-color);display:block;margin-bottom:12px;opacity:.7}.drop-text{font-size:.9rem;color:var(--text-muted);margin:0 0 16px 0}.btn-select{background-color:#fff;border:1px solid var(--accent-color);color:var(--accent-color);padding:8px 20px;font-size:.85rem;font-weight:600;border-radius:6px;cursor:pointer;transition:all .2s}.btn-select:hover{background-color:var(--accent-color);color:#fff}.preview-container{width:100%;height:100%;max-height:320px;padding:10px}#image-preview{width:100%;height:100%;max-height:300px;object-fit:contain;border-radius:6px;display:block;margin:0 auto}.result-box{position:relative;border-radius:10px;flex-grow:1;min-height:320px;display:flex;align-items:center;justify-content:center;overflow:hidden;background-color:#fafbfc;border:1px solid var(--border-color)}.checkerboard{background-image:linear-gradient(45deg,#f0f0f0 25%,transparent 25%) , linear-gradient(-45deg,#f0f0f0 25%,transparent 25%) , linear-gradient(45deg,transparent 75%,#f0f0f0 75%) , linear-gradient(-45deg,transparent 75%,#f0f0f0 75%);background-size:20px 20px;background-position:0 0 , 0 10px , 10px -10px , -10px 0}.result-placeholder{text-align:center;padding:20px;display:flex;flex-direction:column;align-items:center}.placeholder-icon{font-size:3rem;margin-bottom:12px;opacity:.2}.placeholder-text{font-size:.85rem;color:var(--text-muted);line-height:1.6;margin:0}#bg-remover-image-output{max-width:100%;max-height:300px;object-fit:contain;z-index:2}.processing-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:rgba(255,255,255,.95);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:10;padding:30px}.spinner{width:40px;height:40px;border:3px solid rgba(70,117,126,.1);border-top:3px solid var(--accent-color);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:15px}@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}.status-log{font-size:.9rem;font-weight:600;margin-bottom:12px;color:var(--accent-color)}.progress-container{width:70%;height:6px;background-color:var(--bg-input);border-radius:3px;overflow:hidden}.progress-bar{height:100%;background-color:var(--accent-color);width:0%;transition:width .3s ease}.action-container{margin-top:20px}.btn-download{display:block;width:100%;text-align:center;padding:12px 20px;font-size:.95rem;font-weight:700;border-radius:6px;background-color:var(--accent-color);color:#fff!important;text-decoration:none!important;transition:all .2s ease}.btn-download:hover:not(.disabled) {background-color:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 12px rgba(70,117,126,.15)}.btn-download.disabled{background-color:#e2e8f0;color:#a0aec0!important;cursor:not-allowed;box-shadow:none;pointer-events:none}.bg-remover-settings-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:24px 30px 30px;box-shadow:0 4px 12px rgba(0,0,0,.02)}.settings-title{font-size:1.1rem;font-weight:700;margin-top:0;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border-color);color:var(--text-primary)}.sliders-grid{display:flex;flex-direction:column;gap:20px;margin-bottom:25px}.slider-group{display:flex;flex-direction:column;gap:6px}.slider-label-row{display:flex;justify-content:space-between;align-items:center}.slider-label-row label{font-size:.85rem;font-weight:600;color:var(--text-primary)}.slider-val-box{background-color:var(--bg-input);border:1px solid var(--border-color);color:var(--accent-color);font-weight:700;font-size:.8rem;padding:3px 10px;border-radius:4px;min-width:40px;text-align:center}.custom-slider{-webkit-appearance:none;width:100%;height:5px;border-radius:3px;background:var(--bg-input);outline:none;margin:6px 0}.custom-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:#fff;border:2px solid var(--accent-color);cursor:pointer;transition:transform .1s , background-color .1s;box-shadow:0 2px 5px rgba(70,117,126,.2)}.custom-slider::-webkit-slider-thumb:hover{transform:scale(1.15);background:var(--accent-color)}.custom-slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:2px solid var(--accent-color);cursor:pointer;transition:transform .1s , background-color .1s;box-shadow:0 2px 5px rgba(70,117,126,.2)}.custom-slider::-moz-range-thumb:hover{transform:scale(1.15);background:var(--accent-color)}.slider-desc{font-size:.75rem;color:var(--text-muted);margin:0;line-height:1.5}.submit-container{display:flex;justify-content:flex-end}.btn-submit{padding:12px 40px;font-size:.95rem;font-weight:700;color:#fff;background-color:var(--accent-color);border:none;border-radius:6px;cursor:pointer;transition:all .2s ease}.btn-submit:hover{background-color:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 15px rgba(70,117,126,.2)}@media (max-width:768px){.bg-remover-theme-dark{padding:15px;margin:10px}.bg-remover-workspace{grid-template-columns:1fr;gap:20px}.drop-area,.result-box{min-height:260px}.btn-submit{width:100%}}