style.css

:root {
  --red: #f11012;
  --red-darker: #d90d10;
  --green: #82af3a;
  --black: #0f111a;
  --white: #ffffff;
  --offwhite: #f8f8f2;
  --pink: #d91ca8;
  --yellow: #ffb626;
  --yellow-darker: #f0a000;
  --border-radius: 0.5rem;
  --grid-unit: 0.5rem;
  --font-weight-normal: 300;
  --font-weight-bold: 600;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  --global-transition-time: 0.2s;
  --hard-box-shadow: 0.625rem 0.625rem 0 0 var(--yellow-darker);
}

html {
  font-size: 100%;
}

body {
  font-size: 1rem;
  background-color: var(--offwhite);
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  margin: 0;
}

* {
  margin: 0;
  box-sizing: border-box;
}

a:visited {
  color: var(--pink);
}

.container {
  margin: 2rem auto;
  padding: 2rem;
  max-width: 37.5rem;
}

.microblog__title {
  font-size: 2rem;
  line-height: 2rem;
  font-weight: var(--font-weight-bold);
  color: var(--black);
  margin-bottom: 2rem;
}

.microblog__description {
  font-size: 1.5rem;
  line-height: 2.6rem;
  font-weight: var(--font-weight-normal);
  color: var(--black);
  margin-bottom: 2rem;
}

.microblog__link {
  font-size: 1.5rem;
  color: var(--black);
  margin-bottom: 3rem;
  display: inline-block;
  transition: box-shadow var(--global-transition-time) ease 0s;
  text-underline-offset: 0.5rem;
  text-decoration: underline;
}

.microblog__link:focus, .microblog__link:active {
  outline-width: 0;
  box-shadow: var(--yellow) 0 0 0 0.25rem;
}

.item__container {
  box-shadow: rgba(0, 0, 0, 0.55) 0px 1.5rem 1.8rem; /*convert to rems...*/
  background-color: var(--black);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  margin-top: 2rem;
  margin-bottom: 3rem;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  border-top: 0.5rem solid;
  border-image-slice: 1;
  border-image-source: linear-gradient(90deg, var(--yellow) 0%, var(--pink) 100%);
}

.item__topRow {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.item__panther {
  display: flex;
}

.item__date {
  display: flex;
  align-self: flex-start;
  color: var(--yellow);
  font-weight: var(--font-weight-bold);
  font-size: 1.2rem;
}

.item__img {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 2rem;
  border: 0.25rem solid var(--yellow);
}

.item__link {
  padding: 0.5rem 1.75rem;
  display: flex;
  margin: 1rem auto;
  font-size: 1.4rem;
  background-color: #000000;
  font-weight: var(--font-weight-normal);
  color: var(--white);
  text-decoration: none;
  transition: box-shadow var(--global-transition-time) ease 0s;
  border: 0.25rem solid var(--yellow);
  cursor: pointer;
}

.item__link:hover, .item__link:focus, .item__link:active {
  outline-width: 0;
  box-shadow: var(--hard-box-shadow);
}

.item__link:visited {
  color: var(--white);
}

.item__text {
  color: var(--white);
  font-weight: var(--font-weight-normal);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.footer {
  color: var(--black);
  font-weight: var(--font-weight-normal);
  font-size: 1rem;
  margin-top: 8rem;
  margin-bottom: 2rem;
  line-height: 1.4;
  text-align: center;
  display: block;
}

.footer__link {
  font-size: 1rem;
  transition: box-shadow var(--global-transition-time) ease 0s;
  text-underline-offset: 0.5rem;
  text-decoration: underline;
}

.footer__link:focus, .footer__link:active {
  outline-width: 0;
  box-shadow: var(--yellow) 0 0 0 0.25rem;
}