:root{--primary: #4A90D9;--secondary: #FF6B6B;--accent: #FFD93D;--success: #6BCB77;--bg: #F8F9FF;--text: #2D3436;--text-light: #636E72;--radius: 16px;--shadow: 0 4px 20px rgba(74, 144, 217, .15)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:Nunito,sans-serif;font-size:16px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{overflow-x:hidden}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;font-family:inherit}img{max-width:100%;height:auto;display:block}.bounce{animation:bounce .6s ease infinite alternate}.shake{animation:shake .5s ease}.fade-in{animation:fadeIn .4s ease forwards}.slide-up{animation:slideUp .5s ease forwards}@keyframes bounce{0%{transform:translateY(0)}to{transform:translateY(-8px)}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.back-to-home{position:absolute;top:20px;left:20px;color:#fff;text-decoration:none;font-weight:700;font-size:.95rem;padding:8px 16px;border-radius:50px;background:#fff3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:background .2s,transform .2s}.back-to-home:hover{background:#ffffff59;transform:translate(-4px)}