: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}}.calculator{max-width:350px;margin:2rem auto;border-radius:15px;overflow:hidden;box-shadow:0 10px 40px #0003;background:linear-gradient(145deg,#2d2d2d,#1a1a1a)}.calculator-display{background:#1a1a1a;color:#fff;font-size:2.5rem;padding:2rem 1.5rem;text-align:right;min-height:80px;display:flex;align-items:center;justify-content:flex-end;word-wrap:break-word;word-break:break-all;font-family:Courier New,monospace;border-bottom:2px solid #333}.calculator-buttons{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:1px;background:#1a1a1a;padding:1px}.calculator-button{background:#2d2d2d;border:none;color:#fff;font-size:1.5rem;padding:1.5rem;cursor:pointer;transition:all .2s ease;font-weight:500;min-height:70px}.calculator-button:hover{background:#3d3d3d;transform:scale(1.02)}.calculator-button:active{background:#4d4d4d;transform:scale(.98)}.calculator-button.function{background:#505050;color:#fff}.calculator-button.function:hover{background:#606060}.calculator-button.operator{background:#ff9500;color:#fff}.calculator-button.operator:hover{background:#fa3}.calculator-button.col-span{grid-column:span 2}.calculator-button.row-span{grid-row:span 2;display:flex;align-items:center;justify-content:center}.App{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem}.App-header{text-align:center;margin-bottom:2rem}.App-header h1{font-size:3rem;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.App-header p{font-size:1.2rem;color:#888;margin-top:0}@media(max-width:600px){.App-header h1{font-size:2rem}.App-header p{font-size:1rem}}