Easy to adopt minimal CSS reset with superpowers.

:root{
   --primary-color:#156dff;
   --text-color:#444;
   --dark-color:#222;
   --white-color:#fff;
   --light-grey-color:#f8f8f8;
   --light-text-color:#888;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html{
	scroll-behavior: smooth;
}
body{
	color:var(--text-color);
	background:var(--white-color);
	font-family: "Open Sans", Sans-serif;
	font-size: 1rem;
	font-weight: 400;
	line-height: 1.5;
	margin:0;
}
a{
	color:var(--primary-color);
	text-decoration:none;
}
a:hover{
	text-decoration:underline;
}
h1,h2,h3,h4,h5,h6{
	margin-top:0;
	margin-bottom:.825rem;
}
h1{
	font-size:2.4rem;
}
h2{
	font-size:1.875rem;
}
h3{
	font-size:1.5rem;
}
h4{
	font-size:1.25rem;
}
h5{
	font-size:1rem;
}
h6{
	font-size:1rem;
}
p {
    margin: 0 0 1rem 0;
}
ul,ol{
	margin: 0 0 1rem 0;
	padding-left: 1.5rem;
}
li ul,
li ol{
	margin: 0 0 0 0;
}
blockquote{
	background: var(--light-grey-color);
	border-radius: .25rem;
	margin: 0;
	padding: 1rem;
}
dl{
	margin:0 0 1rem 0;
}
dl dt{
	font-weight:500;
}
dl dd{
	margin-left:1rem;
}
address{
	font-style:normal;
}
table{
	border-collapse:collapse;
	border-spacing:0;
}
pre{
	background: var(--dark-color);
    color: var(--white-color);
    padding: 1.5rem;
}
figure{
	margin:1rem 0;
}
fieldset {
    margin: 1rem 0;
    padding: 1.125rem 1rem 1rem 1rem;
}
::placeholder {
	color:var(--light-text-color);
	opacity:1 !important;
}
:focus {
	outline: 0;
}
input,textarea,select{
	font-size:inherit;
	color:inherit;
}
input[type=submit], button{
	cursor:pointer;
}