:root{--primary: #646cff;--primary-hover: #535bf2;--bg: #242424;--card-bg: #1a1a1a;--text: rgba(255, 255, 255, .87);--text-muted: rgba(255, 255, 255, .6);--border: rgba(255, 255, 255, .1);--success: #4ade80;--error: #f87171}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:1rem;padding:3rem;max-width:600px;width:100%;box-shadow:0 20px 25px -5px #0000001a}h1{font-size:2.5rem;margin-bottom:.5rem;background:linear-gradient(135deg,var(--primary) 0%,var(--success) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{color:var(--text-muted);margin-bottom:2rem;font-size:1.1rem}.form{margin-bottom:2rem}.input-group{display:flex;gap:.5rem}.input{flex:1;padding:.75rem 1rem;border:1px solid var(--border);border-radius:.5rem;background:var(--bg);color:var(--text);font-size:1rem;transition:border-color .2s}.input:focus{outline:none;border-color:var(--primary)}.button{padding:.75rem 1.5rem;background:var(--primary);color:#fff;border:none;border-radius:.5rem;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s}.button:hover:not(:disabled){background:var(--primary-hover)}.button:disabled{opacity:.5;cursor:not-allowed}.response{background:var(--bg);border:1px solid var(--border);border-radius:.75rem;padding:1.5rem;margin-bottom:2rem;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.response h2{font-size:1.5rem;margin-bottom:1rem;color:var(--success)}.details{display:flex;gap:1.5rem;color:var(--text-muted);font-size:.9rem}.error{padding:1rem;background:#f871711a;border:1px solid var(--error);border-radius:.5rem;color:var(--error);margin-bottom:1rem}.stack{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border)}.tag{padding:.25rem .75rem;background:var(--bg);border:1px solid var(--border);border-radius:.25rem;font-size:.85rem;color:var(--text-muted)}@media (max-width: 640px){.card{padding:2rem}h1{font-size:2rem}.input-group{flex-direction:column}.details{flex-direction:column;gap:.5rem}}body{margin:0;padding:0}#root{width:100%;min-height:100vh}