:root{--primary-gradient: linear-gradient(180deg, #ff4b4b 0%, #7b1fa2 100%);--background-light: #ffffff;--background-dark: #121212;--text-light: #333333;--text-dark: #ffffff;--accent-color: #7b1fa2;--card-background-light: rgba(255, 255, 255, .9);--card-background-dark: rgba(107, 107, 107, .9);--progress-bar-background: rgba(0, 0, 0, .1);--section-padding: 4rem 2rem}@media (max-width: 768px){:root{--section-padding: 3rem 1rem}}html{scroll-behavior:smooth}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;transition:background-color .3s ease}body.light-mode{--card-background: rgba(255, 255, 255, .9);background-color:var(--background-light);color:var(--text-light)}body.dark-mode{--card-background: rgba(52, 52, 52, .9);background-color:var(--background-dark);color:var(--text-dark)}.container{max-width:1200px;margin:0 auto;padding:0 20px}@keyframes slideIn{0%{transform:translateY(-100px);opacity:0}to{transform:translateY(0);opacity:1}}