:root{--primary-color: rgb(255, 129, 72);--text-color: #333;--bg-color: #fff;--font-family: "Roboto", sans-serif;--transition-speed: .3s}body{margin:0;font-family:var(--font-family);color:var(--text-color);background-color:var(--bg-color)}a{text-decoration:none;color:inherit}ul{list-style:none;padding:0;margin:0}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:var(--primary-color);border-radius:4px}.btn-primary{background-color:var(--primary-color);color:#fff;padding:10px 20px;border-radius:5px;border:none;cursor:pointer;font-weight:700;transition:opacity var(--transition-speed)}.btn-primary:hover{opacity:.9}