:root{--sans:system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;font:15px/1.6 var(--sans);color:#333;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f7faf8}*{box-sizing:border-box}body{margin:0}#root{min-height:100svh}h1,h2,p{margin:0}h1{color:#1a1a1a;letter-spacing:-.3px;font-size:24px;font-weight:600}select,button,input{font-family:inherit;font-size:inherit}.tool{flex-direction:column;justify-content:center;gap:20px;max-width:520px;min-height:100svh;margin:0 auto;padding:40px 24px;display:flex}.tool h1{flex-direction:column;gap:4px;font-size:22px;font-weight:600;display:flex}.tool h1 span{color:#999;font-size:13px;font-weight:400}nav{background:#eef3f0;border-radius:10px;gap:6px;padding:4px;display:flex}nav button{color:#777;cursor:pointer;background:0 0;border:none;border-radius:7px;flex:1;padding:9px 0;font-size:14px;transition:background .15s,color .15s}nav button:hover{color:#555}nav button.on{color:#3ecf8e;background:#fff;font-weight:500;box-shadow:0 2px 6px #3ecf8e26}.drop{text-align:center;cursor:pointer;color:#888;background:#fff;border:1.5px dashed #d5ddd8;border-radius:12px;padding:40px 20px;font-size:14px;transition:border-color .2s,background .2s;display:block}.drop:hover{color:#3ecf8e;background:#f4fbf7;border-color:#3ecf8e}.drop input{display:none}.row{gap:8px;display:flex}.row select{color:#333;cursor:pointer;background:#fff;border:1px solid #e3e8e5;border-radius:9px;outline:none;flex:1;padding:10px 14px;transition:border-color .15s}.row select:focus{border-color:#3ecf8e}.row input[type=number]{color:#333;background:#fff;border:1px solid #e3e8e5;border-radius:9px;outline:none;flex:0 0 110px;padding:10px 14px;transition:border-color .15s}.row input[type=number]:focus{border-color:#3ecf8e}.go{color:#fff;cursor:pointer;background:#3ecf8e;border:none;border-radius:9px;padding:10px 24px;font-weight:500;transition:background .15s,opacity .15s}.go:hover:not(:disabled){background:#35bf82}.go:disabled{opacity:.45;cursor:not-allowed}progress{border:none;border-radius:3px;width:100%;height:6px;overflow:hidden}progress::-webkit-progress-bar{background:#eef3f0;border-radius:3px}progress::-webkit-progress-value{background:#3ecf8e;border-radius:3px;transition:width .2s}progress::-moz-progress-bar{background:#3ecf8e;border-radius:3px}.engine{color:#2a9d6a;background:#f0faf5;border:1px solid #d4efdf;border-radius:10px;flex-direction:column;gap:8px;padding:14px 18px;font-size:14px;display:flex}.engine small{color:#7bbf9d;font-size:12px}.engine progress{height:4px}.est{color:#b5925a;margin:-10px 2px 0;font-size:13px}.dl{text-align:center;color:#2a9d6a;background:#f0faf5;border:1px solid #d4efdf;border-radius:10px;padding:13px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s;display:block}.dl:hover{background:#e5f7ed}.hint{color:#bbb;text-align:center;margin-top:4px;font-size:12px}