:root{--primary: #3498db;--primary-dark: #2980b9;--success: #2ecc71;--danger: #e74c3c;--warning: #f39c12;--gray: #95a5a6;--light: #ecf0f1;--dark: #34495e;--shadow: 0 4px 6px rgba(0, 0, 0, .1)}*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}a{font-weight:500;color:var(--primary);text-decoration:none}a:hover{color:var(--primary-dark)}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}#root{margin:0 auto}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}