:root{--primary-color: #667eea;--primary-dark: #5a6fd8;--primary-light: #a4cafe;--secondary-color: #764ba2;--accent-color: #f093fb;--text-color: #2d3748;--text-light: #718096;--text-muted: #a0aec0;--bg-color: #f7fafc;--bg-secondary: #edf2f7;--white: #ffffff;--border-color: #e2e8f0;--border-hover: #cbd5e0;--success-color: #38a169;--warning-color: #d69e2e;--error-color: #e53e3e;--info-color: #3182ce;--border-radius: 8px;--border-radius-lg: 12px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--transition: all .2s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6;min-height:100vh}.loading-screen{position:fixed;top:0;left:0;right:0;bottom:0;background:var(--white);display:flex;align-items:center;justify-content:center;z-index:9999;opacity:1;transition:opacity .3s ease}.loading-screen.hidden{opacity:0;pointer-events:none}.loading-content{text-align:center}.loading-content .spinner{width:40px;height:40px;border:4px solid var(--border-color);border-top:4px solid var(--primary-color);border-radius:50%;display:inline-block;animation:spin 1s linear infinite;margin-bottom:16px}.loading-content p{color:var(--text-light);font-size:16px}.app-header{background:var(--white);border-bottom:1px solid var(--border-color);padding:16px 0;position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}.header-content{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}.app-header h1{font-size:24px;font-weight:700;color:var(--primary-color)}.header-actions{display:flex;gap:8px}.icon-btn{padding:8px;background:none;border:1px solid var(--border-color);border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);font-size:16px}.icon-btn:hover{background:var(--bg-secondary);border-color:var(--border-hover)}.app-main{flex:1;padding:24px 0}.app-container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;flex-direction:column;gap:24px}.section{background:var(--white);border-radius:var(--border-radius-lg);padding:24px;box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.section-header h2{font-size:20px;font-weight:600;color:var(--text-color)}.section-subtitle{color:var(--text-light);font-size:14px}.file-upload-area{margin-top:16px}.drop-zone{border:2px dashed var(--border-color);border-radius:var(--border-radius-lg);padding:40px 24px;text-align:center;transition:var(--transition);cursor:pointer;position:relative;min-height:120px;display:flex;align-items:center;justify-content:center}.drop-zone:hover,.drop-zone:focus{border-color:var(--primary-color);background:rgba(102,126,234,.02)}.drop-zone.drag-over{border-color:var(--primary-color);background:rgba(102,126,234,.05);transform:scale(1.02)}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:12px}.drop-icon{font-size:48px;opacity:.5}.drop-text{font-size:16px;color:var(--text-color)}.drop-hint{font-size:14px;color:var(--text-light)}.link-btn{background:none;border:none;color:var(--primary-color);cursor:pointer;text-decoration:underline;font:inherit}.link-btn:hover{color:var(--primary-dark)}.file-info{display:flex;align-items:center;gap:16px;padding:16px;background:var(--bg-secondary);border-radius:var(--border-radius);margin-top:16px}.file-icon{font-size:32px}.file-details{flex:1;display:flex;flex-direction:column}.file-name{font-weight:500;color:var(--text-color)}.file-size{font-size:14px;color:var(--text-light)}.remove-btn{background:none;border:none;cursor:pointer;padding:4px;border-radius:4px;transition:var(--transition)}.remove-btn:hover{background:rgba(229,62,62,.1)}.options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}.option-group{display:flex;flex-direction:column;gap:8px}.checkbox-label{display:flex;align-items:center;gap:12px;cursor:pointer;font-weight:500}.checkbox-label input[type=checkbox]{display:none}.checkbox-custom{width:20px;height:20px;border:2px solid var(--border-color);border-radius:4px;position:relative;transition:var(--transition)}.checkbox-label input[type=checkbox]:checked+.checkbox-custom{background:var(--primary-color);border-color:var(--primary-color)}.checkbox-label input[type=checkbox]:checked+.checkbox-custom:after{content:"✓";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:var(--white);font-size:12px;font-weight:700}.option-group small{color:var(--text-light);font-size:13px}.option-group label:not(.checkbox-label){font-weight:500;color:var(--text-color);margin-bottom:4px}.option-group input[type=text],.option-group input[type=number]{padding:8px 12px;border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:14px;transition:var(--transition)}.option-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #667eea1a}.speaker-config{margin-top:20px;padding-top:20px;border-top:1px solid var(--border-color)}.speaker-config-header{display:flex;align-items:center;justify-content:between;margin-bottom:16px}.speaker-config-header h3{font-size:16px;font-weight:600;color:var(--text-color)}.add-btn{padding:6px 12px;background:var(--primary-color);color:var(--white);border:none;border-radius:var(--border-radius);font-size:14px;cursor:pointer;transition:var(--transition)}.add-btn:hover{background:var(--primary-dark)}.speaker-list{display:flex;flex-direction:column;gap:12px}.speaker-item{display:grid;grid-template-columns:auto 1fr 2fr auto;gap:12px;align-items:center;padding:12px;background:var(--bg-secondary);border-radius:var(--border-radius)}.speaker-checkbox{width:18px;height:18px}.speaker-input{padding:6px 10px;border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:14px}.speaker-remove{background:none;border:none;cursor:pointer;padding:4px;color:var(--error-color);border-radius:4px;transition:var(--transition)}.speaker-remove:hover{background:rgba(229,62,62,.1)}.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}.setting-group{display:flex;flex-direction:column;gap:8px}.setting-group label{font-weight:500;color:var(--text-color)}.setting-group input{padding:8px 12px;border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:14px;transition:var(--transition)}.setting-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #667eea1a}.setting-group small{color:var(--text-light);font-size:13px}.prompts-container{display:flex;flex-direction:column;gap:20px}.prompt-group{display:flex;flex-direction:column;gap:8px}.prompt-group label{font-weight:500;color:var(--text-color)}.prompt-group 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var(--border-color);border-radius:var(--border-radius);background:var(--white);cursor:pointer;font-size:14px;transition:var(--transition)}.clear-btn:hover{background:var(--bg-secondary)}.download-btn{background:var(--success-color);color:var(--white);border-color:var(--success-color)}.download-btn:hover{background:#2f855a}.output-container{margin-top:16px}.log-output{background:#1a202c;color:#e2e8f0;padding:16px;border-radius:var(--border-radius);font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:13px;line-height:1.5;max-height:400px;overflow-y:auto;white-space:pre-wrap;word-wrap:break-word}.log-output:empty:before{content:"Processing logs will appear 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(prefers-color-scheme: dark){:root{--text-color: #e2e8f0;--text-light: #a0aec0;--text-muted: #718096;--bg-color: #1a202c;--bg-secondary: #2d3748;--white: #2d3748;--border-color: #4a5568;--border-hover: #718096}.log-output{background:#0f1419;color:#e2e8f0}}@media (prefers-reduced-motion: reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.primary-btn:hover:not(:disabled){transform:none}.drop-zone.drag-over{transform:none}}