style.pcss

:root {
  --font-size: 1rem;
  --dark-color: #353535;
  --orange-color: orange;
  --green-color: teal;
  --grey-color: grey;
  --white-color: white;
  --dark-white-color: #FDFDFD;
  --darker-white-color: #F5F5F5;
  --light-grey-color: rgba(0,0,0, 0.1);
  --top-border: {
    border-top: 1px dashed grey;
    padding-top: 10px;
  };
  --opacity-transitions: {
    transition: opacity 0.5s;
  };
  --color-transitions: {
    transition: background-color 0.5s;
  };
}

html, body {
  padding: 0;
  margin: 0;
  font-family: Arial, sans-serif;
}

#page-header {
  position: fixed;
  z-index: 10;
  top: 0;
  width: 100%;
  background-color: var(--green-color);
  padding: 10px;
  box-sizing: border-box;
}

#page-logo {
  color: white;
  font-size: calc(var(--font-size) * 2);
  display: inline-block;
  vertical-align: 0px;
  padding: 10px;
  margin-top: 10px;
  font-weight: bold;
}

nav {
  display: inline-block;
  float: right;
  & ul {
    padding: 0;
  };
}

nav a {
  display: inline-block;
  vertical-align: top;
  padding: 10px 20px;
  margin: 0px 5px;
  color: #FDFDFD;
  text-transform: uppercase;
  text-decoration: none;
  @apply --color-transitions;
  &:hover {
    background-color: var(--light-grey-color);
    @apply --color-transitions;
  };
  & li {
    list-style: none;
  };
};

#container {
  background: #FDFDFD;
  padding-top: 100px;
  box-sizing: border-box;
  width: 100%;
  min-width: 1200px;
}

#articles, #sidebar {
  display: inline-block;
  vertical-align: top;
  padding: 20px;
  margin: 0;
  box-sizing: border-box;
}

#articles {
  margin: 0;
  width: 70%;
}

#sidebar {
  background-color: var(--dark-color);
  color: white;
  margin: 0;
  width: 29.6%;
  margin-top: 89px;
}

#articles > h1 {
  text-align: center;
}

#articles > .article {
  width: 100%;
  background-color: #FFFFFF;
  border: 1px solid var(--light-grey-color);
  padding: 20px;
  margin: 10px 0;
  display: flex;
  flex-direction: row;
  box-sizing: border-box;
}

.article > div {
  padding: 10px;
}

.article p {
  color: #666666;
}

.article span {
  font-size: calc(var(--font-size) * 0.8);
  color: grey;
}

.article .article-actions {
  margin-top: 10px;
  border-top: 1px dashed var(--light-grey-color);
  padding-top: 10px;
}

.btn {
  padding: 10px 30px;
  border: 0;
  background-color: var(--green-color);
  color: white;
  outline: none;
  font-weight: bold;
  font-size: var(--font-size);
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0.8;
  @apply --opacity-transitions;
}

.btn:hover {
  opacity: 1;
  @apply --opacity-transitions;
}

.btn-primary {
  background-color: orange;
}

.btn-secondary {
  background-color: grey;
}

#sidebar > h2 {
  margin: 0;
  padding: 0;
}

#sidebar form {
  padding: 10px 0;
}

.form-group {
  padding: 5px 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.form-group label {
  font-size: calc(var(--font-size * 0.8));
  padding: 5px 0;
  text-transform: uppercase;
}

.form-group .form-input {
  padding: 5px 10px;
  font-size: calc(var(--font-size * 0.9));
  outline: none;
  border: 1px solid var(--light-grey-color);
}

#page-footer {
  background-color: var(--dark-color);
  padding: 20px 0;
  width: 100%;
  text-align: center;
  color: white;
}