:root{--primary-color:#1e90ff;--secondary-color:#104e8b;--background-color:#121212;--text-color:#f1f1f1;--card-background:#1e1e1e;--border-color:#444;--transition-duration:0.3s;--transition-timing:cubic-bezier(0.4,0,0.2,1)}body{background-color:var(--background-color);color:var(--text-color);font-family:Arial,sans-serif;margin:0;padding:0;transition:background-color var(--transition-duration),color var(--transition-duration);animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.container{max-width:800px;margin:20px auto;padding:20px;background-color:var(--card-background);border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.1);transition:background-color var(--transition-duration),transform var(--transition-duration),box-shadow var(--transition-duration);animation:slideUp .6s var(--transition-timing)}@keyframes 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