:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--color-blue: #3b82f6;--color-green: #10b981;--color-red: #ef4444;--color-gray: #626262;--color-white: #ffffff;--color-light-red: #fee2e2}#root{width:100%;height:100vh;margin:0;padding:0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;background-color:#f3f4f6}.app-container{display:flex;justify-content:center;align-items:center;height:100vh;padding:1rem}.card{background:var(--color-white);border-radius:8px;padding:3rem 2rem;box-shadow:0 4px 6px #0000001a;min-width:300px;text-align:center;transition:border-color .3s ease}.card.error{border:2px solid var(--color-red);background-color:var(--color-light-red)}.price-title{font-size:1.5rem;color:var(--color-gray);margin-bottom:1rem;font-weight:600}.price-display{font-size:3.5rem;font-weight:700;color:var(--color-blue);font-family:Monaco,Courier New,monospace;margin-bottom:1rem}.change-display{font-size:1.5rem;font-weight:700;font-family:Monaco,Courier New,monospace;margin-bottom:2rem}.change-display.positive{color:var(--color-green)}.change-display.negative{color:var(--color-red)}.loading{font-size:1.25rem;color:var(--color-gray);animation:pulse 1.5s ease-in-out infinite;padding:2rem 0}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.error-message{color:var(--color-red);margin-bottom:1.5rem;font-size:.875rem}.button-group{display:flex;gap:1rem;flex-direction:column;justify-content:center}.btn{padding:.75rem 1.5rem;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background-color:var(--color-blue);color:var(--color-white)}.btn-primary:hover:not(:disabled){background-color:#2563eb;transform:translateY(-2px);box-shadow:0 4px 12px #3b82f64d}.btn-secondary{background-color:#d1d5db;color:var(--color-gray)}.btn-secondary:hover{background-color:#9ca3af;transform:translateY(-2px)}@media(max-width:768px){.price-display{font-size:2.5rem}.change-display{font-size:1.25rem}.card{padding:2rem 1.5rem;min-width:280px}.button-group{flex-direction:column}.btn{width:100%}}