*{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}.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 .3s}.step-dot.active{background:var(--primary)}form{display:flex;flex-direction:column;gap:16px}label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:500;color:var(--text-secondary)}input[type=text],input[type=email],input[type=password],textarea,select{padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--input-bg);color:var(--text);font-size:15px;font-family:inherit;outline:none;transition:border-color .2s}input:focus,textarea:focus,select:focus{border-color:var(--primary)}input[type=file]{padding:10px;border:2px dashed var(--border);border-radius:var(--radius-sm);background:var(--input-bg);cursor:pointer;font-size:14px;color:var(--text-secondary)}input[type=file]:hover{border-color:var(--primary)}.hint{font-size:12px;color:var(--text-hint);font-weight:400}button{padding:12px 24px;border:none;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;transition:background .2s,opacity .2s;font-family:inherit}button[type=submit],button:not(.link-btn):not(.secondary):not(.danger){background:var(--primary);color:#fff}button[type=submit]:hover,button:not(.link-btn):not(.secondary):not(.danger):hover{background:var(--primary-hover)}button:disabled{opacity:.5;cursor:not-allowed}button.danger{background:var(--danger);color:#fff}button.danger:hover{background:var(--danger-hover)}button.secondary{background:var(--input-bg);color:var(--text);border:1px solid var(--border)}button.link-btn{background:none;color:var(--primary);padding:8px;font-size:14px}button.link-btn:hover{text-decoration:underline}.error{background:var(--error-bg);color:var(--error-text);padding:12px 16px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:16px}.info{color:var(--text-secondary);font-size:14px;margin-bottom:16px}.progress-container{text-align:center;padding:24px 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}.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-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}}