:root{font-family:Helvetica Neue,Helvetica,Arial,sans-serif;--primary-color: #3b82f6;--secondary-color: #10b981;--background-color: #f9fafb;--text-color: #1f2937;--card-background: #ffffff;--shadow-color: rgba(0, 0, 0, .1)}body{margin:0;background-color:var(--background-color);color:var(--text-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{display:flex;flex-direction:column;min-height:100vh;width:100%}.container{width:100%;max-width:640px;margin:0 auto;padding:1rem;box-sizing:border-box}button{cursor:pointer;border:none;border-radius:8px;padding:10px 20px;font-size:1rem;font-weight:600;color:#fff;background-color:var(--primary-color);transition:background-color .2s}button:hover{background-color:#2563eb}h1,h2,h3{margin:0;padding:0}