/* -------------------------------------------------------------------------- *\
|* Core defaults
\* -------------------------------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap');

:root {
  --spacing-xs: 5px;
  --spacing-sm: 10px;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  /* --spacing-xxl: 30px; */

  --bg-color-base: #ffffff;
  --bg-color-light: #f8f9fa;
  --bg-color-dark: #343a40;
  --bg-color-highlight: #28b76b;
  --bg-color-highlight-hover: #1e8a51;

  --link-color: var(--bg-color-highlight);
  --link-hover-color: var(--bg-color-highlight-hover);

  --border-color-light: #e8e8e8;
  --border-color-dark: var(--bg-color-dark);
  --border-color-highlight: var(--bg-color-highlight);
  --border-color-highlight-hover: var(--bg-hover-color-highlight);

  /* --text-xs: 0.7rem;*/
  --text-sm: 0.85rem;
  --text-md: 1rem;
  --text-lg: 1.5rem;
  --text-xl: 2rem;
  --text-xxl: 3rem;

  --text-font-family: 'Poppins', Verdana, sans-serif;

  --text-color-light: #9da3ae;
  --text-color-base: #5d6778;
  --text-color-dark: #252930;

  --text-normal: 400;
  --text-bold: 700;
}

/*
// Small devices (landscape phones, 576px and up)
@media (min-width: 576px) { ... }

// Medium devices (tablets, 768px and up)
@media (min-width: 768px) { ... }

// Large devices (desktops, 992px and up)
@media (min-width: 992px) { ... }

// X-Large devices (large desktops, 1200px and up)
@media (min-width: 1200px) { ... }

// XX-Large devices (larger desktops, 1400px and up)
@media (min-width: 1400px) { ... }
*/

body {
  position: relative;
  background-color: var(--bg-color-base);
  font-family: var(--text-font-family);
  font-size: var(--text-md);
  font-weight: var(--text-normal);
  color: var(--text-color-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3 {
  font-weight: var(--text-bold);
  color: var(--text-color-dark);
}
h1 {
  font-size: var(--text-xxl);
  margin-bottom: var(--spacing-md);
}
h2 {
  font-size: var(--text-xl);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}
h3 {
  font-size: var(--text-lg);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

strong {
  font-weight: var(--text-bold);
}

a,
.nav-link {
  color: var(--link-color);
  text-decoration: none;
}
a:active,
a:hover,
.nav-link:active,
.nav-link:hover {
  /* color: #24a460; */
  color: var(--link-hover-color);
  text-decoration: underline;
}

blockquote {
  margin-left: 0;
  margin-right: 0;
  padding-left: 1em;
  color: var(--text-color-light);
  border-left: 0.2rem solid #e8e8e8;
}

/* -------------------------------------------------------------------------- *\
|* Core layout
\* -------------------------------------------------------------------------- */

#topnav {
  box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.1);
  background: var(--bg-color-base);
}
#topnav .navbar-brand p {
  display: inline-block;
  margin: 0 0 0 var(--spacing-sm);
  font-size: var(--text-lg);
  font-weight: var(--text-bold);
}
#topnav .navbar-brand p span {
  font-weight: var(--text-normal);
}

#topnav .navbar-nav .nav-item {
  font-size: var(--text-lg);
}

main {
  position: relative;
  margin-top: 4rem;
}

/* -------------------------------------------------------------------------- *\
|* Homepage
\* -------------------------------------------------------------------------- */

#home #intro {
  position: relative;
  background-color: var(--bg-color-highlight);
  color: #ffffff;
}
#home #intro div {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
}
#home #intro div:nth-of-type(1)::before,
#home #intro div:nth-of-type(1)::after,
#home #intro div:nth-of-type(2)::before,
#home #intro div:nth-of-type(2)::after,
#home #intro div:nth-of-type(3)::before {
  content: '';
  position: absolute;
  moz-transform-origin: top left;
  -webkit-transform-origin: top left;
  transform-origin: top left;
  border-radius: 5px;
}
#home #intro div:nth-of-type(1)::before {
  top: 0;
  left: -200px;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  -webkit-transform: skew(25deg, -12deg);
  transform: skew(25deg, -12deg);
}
#home #intro div:nth-of-type(1)::after {
  top: 30px;
  left: 0px;
  width: 150px;
  height: 600px;
  background: rgba(255, 255, 255, 0.15);
  -webkit-transform: skew(-25deg, 10deg);
  transform: skew(-25deg, 10deg);
}
#home #intro div:nth-of-type(2):before {
  top: 0;
  right: -40px;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  -webkit-transform: skew(45deg, -40deg);
  transform: skew(45deg, -40deg);
}
#home #intro div:nth-of-type(2)::after {
  top: -10px;
  right: -100px;
  width: 150px;
  height: 600px;
  background: rgba(255, 255, 255, 0.15);
  -webkit-transform: skew(-20deg, 0deg);
  transform: skew(-20deg, 0deg);
}
#home #intro div:nth-of-type(3)::before {
  top: 60px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.09);
  -webkit-transform: skew(-40deg, 10deg);
  transform: skew(-40deg, 10deg);
}
#home #intro h1 {
  color: #ffffff;
}

#home #articles-selection button {
  background-color: var(--bg-color-base);
  border: 1px solid var(--bg-color-highlight);
  color: var(--text-color-base);
  border-radius: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  margin: var(--spacing-xs) var(--spacing-xs);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background-color 0.3s ease;
}

#home #articles-selection button.active,
#home #articles-selection button:hover {
  background-color: var(--bg-color-highlight);
  color: #ffffff;
}

#home .card a h2 {
  font-size: 1.35rem;
  margin-top: 0;
}
#home .card a p {
  color: var(--text-color-base);
}
#home .card .badge {
  background-color: #9d9d9d;
  font-weight: normal;
}
#home .card a:hover {
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
  text-decoration: none;
}
#home .card a:hover .card-body {
  background-color: #f4fcf6;
}
#home .card a:hover h2 {
  text-decoration: underline;
}

/* -------------------------------------------------------------------------- *\
|* Article page
\* -------------------------------------------------------------------------- */

/* === Table of contents === */

/* Layout + Scrollbar */

#article aside {
  position: sticky;
  top: 4rem;
  height: calc(100vh - 6rem);
  padding-left: 0.25rem;
  margin-left: -0.25rem;
  overflow-y: auto;
}
#article aside::-webkit-scrollbar {
  width: 6px;
  background-color: #f5f5f5;
}
#article aside::-webkit-scrollbar-thumb {
  border-radius: 0.5rem;
  background-color: rgba(0, 0, 0, 0.125);
}
#article aside > nav {
  overflow-y: auto;
  padding: var(--spacing-md);
  position: relative;
}

/* All links */

#article aside .nav-link {
  font-size: var(--text-sm);
  color: var(--text-color-base);
}
#article aside .nav-link:hover,
#article aside .nav-link.active {
  text-decoration: none;
}
#article aside .nav-link:hover,
#article aside .nav-link.active:hover {
  color: var(--link-hover-color);
  border-color: var(--link-hover-color);
}
#article aside .nav-link.active {
  color: var(--link-color);
  border-color: var(--link-color);
}

/* Parent links */

#article aside > nav > .nav-link {
  border-bottom: 3px solid var(--bg-color-base);
}

/* Child links */

#article aside > nav > nav > .nav-link {
  margin: 0 0 0 var(--spacing-xl);
  padding: var(--spacing-xs);
  border-bottom: 3px solid var(--bg-color-base);
}

/* === Article content === */

#article article .breadcrumbs {
  color: var(--text-color-light);
  font-style: italic;
}
#article article img {
  max-width: 100%;
  height: auto;
  box-shadow: var(--bs-box-shadow-sm) !important;
}
#article :not(pre) > code {
  padding: 3px;
  border-radius: 0.25rem;
  color: var(--text-color-base);
  background: #f4f4f4;
}
#article pre code {
  display: block;
  overflow-x: auto;
  padding: 0.5em;
  color: #383a42;
}
#article pre code,
#article .hljs {
  background: #f4f4f4;
}
#article table th,
#article table td {
  border: 1px solid var(--border-color-light);
}