*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0e0e12;--card: #1a1a24;--card-hover: #22222e;--border: #2a2a38;--text: #e8e8f0;--text-dim: #888899;--accent: #6c63ff;--accent-hover: #5a52e0;--green: #43e97b;--green-hover: #35c466;--red: #ff4d6a;--radius: 16px;--radius-sm: 10px}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;justify-content:center;padding:32px 16px}.app{width:100%;max-width:560px;display:flex;flex-direction:column;gap:20px}.header{text-align:center;padding:12px 0 4px}.header h1{font-size:36px;letter-spacing:4px}.subtitle{font-size:16px;color:var(--text);margin-top:8px;font-weight:600}.hint{font-size:12px;color:var(--text-dim);margin-top:6px}.status-bar{display:flex;align-items:center;gap:10px;padding:10px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;color:var(--text-dim)}.status-bar.ready{border-color:var(--green);color:var(--green)}.status-bar.error{border-color:var(--red);color:var(--red)}.spinner{width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}.spinner.hidden{display:none}@keyframes spin{to{transform:rotate(360deg)}}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:all .2s;background:var(--card)}.dropzone:hover,.dropzone.drag-over{border-color:var(--accent);background:var(--card-hover)}.dropzone.has-file{border-color:var(--green);border-style:solid}.dropzone-icon{font-size:42px;margin-bottom:12px}.dropzone-title{font-size:16px;font-weight:600;margin-bottom:6px}.dropzone-sub{font-size:13px;color:var(--text-dim)}.file-info{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm)}.file-name{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:70%}.file-size{font-size:13px;color:var(--text-dim)}.format-section{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm)}.format-section label{font-size:14px;font-weight:600}.format-section select{flex:1;padding:8px 12px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:8px;font-size:14px;cursor:pointer;outline:none}.format-section select:focus{border-color:var(--accent)}.progress-section{display:flex;align-items:center;gap:14px}.progress-bar{flex:1;height:8px;background:var(--card);border-radius:4px;overflow:hidden}.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--green));border-radius:4px;transition:width .3s ease}.progress-fill.indeterminate{background:linear-gradient(90deg,var(--accent),var(--green),var(--accent));background-size:200% 100%;animation:shimmer 1.5s ease-in-out infinite}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.progress-text{font-size:13px;font-weight:700;min-width:42px;text-align:right;color:var(--accent)}.actions{display:flex;gap:12px}.btn{flex:1;padding:14px 20px;border:none;border-radius:var(--radius-sm);font-size:15px;font-weight:700;cursor:pointer;transition:all .15s}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-success{background:var(--green);color:#0e0e12}.btn-success:hover:not(:disabled){background:var(--green-hover)}.log-section{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}.log-section summary{padding:10px 16px;font-size:13px;color:var(--text-dim);cursor:pointer;-webkit-user-select:none;user-select:none}.log-section pre{max-height:200px;overflow-y:auto;padding:12px 16px;font-size:11px;font-family:Cascadia Code,Consolas,monospace;color:var(--text-dim);background:var(--bg);white-space:pre-wrap;word-break:break-all}.footer{text-align:center;font-size:11px;color:var(--text-dim);padding-top:8px}.footer a{color:var(--accent);text-decoration:none}.footer a:hover{text-decoration:underline}.footer-links{display:inline-flex;gap:8px;align-items:center;margin-top:4px}.footer-links .sep{color:var(--border)}.hidden{display:none!important}.toggle-row{display:flex;gap:20px;flex-wrap:wrap}.toggle-label{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-dim);cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-label input[type=checkbox]{display:none}.toggle-switch{position:relative;width:40px;height:22px;background:var(--border);border-radius:11px;transition:background .2s;flex-shrink:0}.toggle-switch:after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;background:var(--text-dim);border-radius:50%;transition:transform .2s,background .2s}.toggle-label input:checked+.toggle-switch{background:var(--accent)}.toggle-label input:checked+.toggle-switch:after{transform:translate(18px);background:#fff}