#multicalculator {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#multicalculator button {
    transition: all 0.3s ease;
    font-weight: 500;
}

#multicalculator button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

#multicalculator .grid-cols-4 button,
#multicalculator .grid-cols-6 button {
    min-height: 60px;
    font-size: 1.5rem;
}

#multicalculator input {
    font-size: 2rem;
    transition: all 0.3s ease;
}

#multicalculator #menu-dropdown {
    animation: slideDown 0.2s ease-out;
}

#multicalculator #converter-menu {
    animation: slideIn 0.2s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 640px) {
    #multicalculator #menu-dropdown {
        width: 100%;
        left: 0;
    }
    #multicalculator #converter-menu {
        width: 100%;
        left: 0;
    }
    #multicalculator .grid-cols-4,
    #multicalculator .grid-cols-6 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    #multicalculator input {
        font-size: 1.5rem;
    }
    #multicalculator button {
        font-size: 1.2rem;
        padding: 2px;
    }
    #multicalculator .max-w-2xl {
        max-width: 100%;
    }
}