*{margin:0;padding:0;box-sizing:border-box}:root{--bg: #f8f9fb;--card-bg: #ffffff;--text: #1a1a2e;--text-secondary: #6b7280;--text-hint: #9ca3af;--primary: #3b82f6;--primary-hover: #2563eb;--danger: #ef4444;--danger-hover: #dc2626;--success: #10b981;--error-bg: #fef2f2;--error-text: #dc2626;--border: #e5e7eb;--input-bg: #f9fafb;--radius: 12px;--radius-sm: 8px}@media(prefers-color-scheme:dark){:root{--bg: #0f1117;--card-bg: #1a1d27;--text: #e5e7eb;--text-secondary: #9ca3af;--text-hint: #6b7280;--border: #2d3040;--input-bg: #252836;--error-bg: #2d1515}}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}header{padding:20px 32px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--border)}.logo{font-size:20px;font-weight:700;color:var(--primary);text-decoration:none}.tagline{font-size:13px;color:var(--text-hint)}main{flex:1;display:flex;align-items:flex-start;justify-content:center;padding:48px 16px}footer{padding:20px 32px;text-align:center;border-top:1px solid var(--border)}footer p{font-size:12px;color:var(--text-hint);max-width:500px;margin:0 auto}footer .version{margin-top:8px;font-size:11px;opacity:.6}.page{width:100%;max-width:480px}.card{background:var(--card-bg);border-radius:var(--radius);padding:32px;border:1px solid var(--border)}h1{font-size:22px;font-weight:700;margin-bottom:4px}h2{font-size:18px;font-weight:600;margin-bottom:8px}.subtitle{color:var(--text-secondary);font-size:14px;margin-bottom:24px}.steps-indicator{display:flex;gap:8px;margin-bottom:24px}.step-dot{width:32px;height:4px;border-radius:2px;background:var(--border);transition:background 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0}.progress-label{font-size:14px;color:var(--text-secondary);margin-bottom:12px}.progress-track{width:100%;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);border-radius:3px;transition:width .3s ease}.progress-percent{font-size:24px;font-weight:700;color:var(--text);margin-top:12px}.file-progress-list{display:flex;flex-direction:column;gap:12px;text-align:left}.file-progress-item{padding:10px 12px;background:var(--input-bg);border-radius:var(--radius-sm)}.file-progress-header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:4px}.file-progress-header .file-name{font-size:13px;font-weight:500;margin-bottom:0;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-status{font-size:12px;white-space:nowrap}.file-status--pending{color:var(--text-hint)}.file-status--encrypting,.file-status--uploading{color:var(--primary)}.file-status--done{color:var(--success)}.file-status--error{color:var(--danger, #e74c3c)}.file-progress-item .progress-container{padding:4px 0 0}.file-progress-item .progress-percent{display:none}.done{text-align:center;padding:16px 0}.success-icon{width:56px;height:56px;border-radius:50%;background:var(--success);color:#fff;font-size:28px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}.result-link{margin:24px 0;text-align:left}.result-link label{margin-bottom:6px}.copy-field{display:flex;gap:8px}.copy-field input{flex:1;font-size:13px;font-family:monospace}.copy-field button{white-space:nowrap;padding:10px 16px;font-size:13px}.file-list{margin:8px 0 16px}.file-item{display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px solid var(--border);font-size:14px}.file-item .file-name{flex:1;font-size:14px;font-weight:500;margin-bottom:0}.file-item .file-size{color:var(--text-secondary);font-size:13px;white-space:nowrap}.file-item .remove-btn{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:2px 6px;font-size:14px;line-height:1;border-radius:4px}.file-item .remove-btn:hover{background:var(--danger, #e74c3c);color:#fff}.file-summary{font-size:13px;color:var(--text-secondary);margin-top:8px}.file-card{background:var(--input-bg);border-radius:var(--radius-sm);padding:20px;margin-bottom:20px}.file-name{font-size:16px;font-weight:600;margin-bottom:8px;word-break:break-all}.file-meta{font-size:13px;color:var(--text-secondary);margin-bottom:4px}.file-info,.manage-info{display:flex;flex-direction:column;gap:16px}.confirm-delete{text-align:center}.confirm-delete p{font-size:14px;color:var(--text-secondary);margin-bottom:16px}.button-group{display:flex;gap:12px;justify-content:center}.error-state{text-align:center;padding:24px 0;color:var(--error-text)}@media(max-width:520px){.card{padding:24px 20px}header{padding:16px 20px}main{padding:24px 12px}}