normalize.css

/* normalize line height and webkit orientation changes in line height */
html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}

/* remove body margin  */
body {
  margin: 0;
}

/* fix h1, h2 font size properties removing irregular changes in section/article parents  */
h1 {
  font-size: 2rem;
}
h2 {
  font-size: 1.5rem;
}

/* remove unwanted padding and margins */
div,
h1,
h2,
h3,
h4,
h5,
h6,
p {
  padding: 0;
  margin: 0;
}

/* normalize images as blocks */
img {
  display: block;
}

/*  normalize font and remove margins in all browsers */
button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
}


/* normalize styles of clickables in safari  */
button,
[type='button'],
[type='reset'],
[type='submit'] {
  -webkit-appearance: button;
}

/* remove paddings and border in firefox */
button::-moz-focus-inner,
[type='button']::-moz-focus-inner,
[type='reset']::-moz-focus-inner,
[type='submit']::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

button:-moz-focusring,
[type='button']:-moz-focusring,
[type='reset']:-moz-focusring,
[type='submit']:-moz-focusring {
  outline: 1px dotted ButtonText;
}

/* normalize anchor stylings */
a {
  color: inherit;
  text-decoration: none;
}