:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;cursor:pointer;transition:border-color .25s}body{margin:0;padding:0;font-family:Arial,sans-serif}#root{width:100%;min-height:100vh;display:flex;justify-content:center;align-items:center}.app-wrapper{width:100%;max-width:960px;padding:16px;display:flex;flex-direction:column;align-items:center;gap:12px}.app-title{font-size:clamp(16px,3.8vw,24px);margin:0}.app-controls{width:100%;display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.app-input{padding:10px 12px;border:1px solid #ccc;border-radius:8px;font-size:14px;min-width:200px;flex:1 1 220px}.app-spin{padding:12px 18px;border:none;border-radius:999px;background:#ff5c62;color:#fff;font-weight:700;font-size:14px}.app-error{color:#d33}.modal-backdrop{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;padding:20px 24px;border-radius:12px;max-width:420px;width:90vw;box-shadow:0 10px 30px #0003;text-align:center}.modal h3{margin:0 0 12px}.modal button{padding:10px 16px;border:none;border-radius:8px;background:#1971c2;color:#fff;font-weight:600}@media (max-width: 480px){.app-wrapper{padding:12px}.app-input{min-width:160px}}