@import url('https://fonts.googleapis.com/css2?family=Lato:wght@300;400;700;900&display=swap');

:root {
  --bg: #131416;
  --secondary-bg: #222831;
  --secondary-bg-hover: #2e3640;
  --navbar-bg: #1e1e2f;
  --link: #9f7aea;
  --link-hover: #bfa3ff;
  --text: #ffffff;
  --secondary-text: #b0b3b8;
  --transition: all 0.5s ease-in-out;
  --margin: 10%;
}

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

html {
  font-family: "Lato", sans-serif;
  font-size: 1.2rem;
  line-height: 1.6;
  background-color: var(--bg);
  color: var(--text);
  scroll-behavior: smooth;
}

.reveal {
  transform: translateY(90px);
  opacity: 0;
  transition: 2s all ease;
}

*.active {
  transform: translateY(0);
  opacity: 1;
}

nav {
  z-index: 1000;
  width: 100%;
  background-color: var(--navbar-bg);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  position: sticky;
  top: 0;
}

nav > div:nth-child(1) {
  padding: 1rem 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  margin: 0 var(--margin);
}

.nav-categories {
  display: flex;
  gap: 2rem;
  align-items: center;
}

nav h4 {
  font-size: 1.5rem;
}

#search, #search2 {
  display: flex;
  align-items: center;
  width: 30%;
}

#searchInput, #searchInput2 {
  border-radius: 0.5rem 0 0 0.5rem;
  border: 2px solid var(--link);
  background-color: var(--secondary-bg);
  padding: 0.5rem;
  width: 150%;
  font-size: 1rem;
  color: var(--text);
}

#searchButton {
  border-radius: 0 0.5rem 0.5rem 0;
  border: 2px solid var(--link);
  background-color: var(--link);
  padding: 0.5rem;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
}

#searchButton:hover {
  background-color: var(--link-hover);
  border-color: var(--link-hover);
  transition: var(--transition);
}

nav a {
  color: var(--text);
  text-decoration: none;
}

nav a:hover {
  color: var(--link-hover);
  transition: var(--transition);
}

#hamburger-menu {
  background-color: #2f2f44;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(-20px);
  max-height: 0;
  overflow: hidden;
  pointer-events: none;
  display: none;
}

#hamburger-menu.show {
  opacity: 1;
  transform: translateY(0);
  max-height: 500px; /* enough to contain all content */
  pointer-events: auto;
}

.hamburger-button {
  display: none;
}

#hamburger-menu .nav-categories div {
  padding: 0.8rem 2rem;
}

#hamburger-menu .nav-categories div:hover, #hamburger-menu .nav-categories div:focus {
  background-color: var(--link-hover);
  color: var(--text);
  transition: var(--transition);
}

#search2 {
  width: 100%;
  padding: 0.8rem 2rem;
}

#searchInput2 {
  width: 100%;
}

.main-page header {
  display: flex;
  height: 35em;
  background-image: url("./images/banner.png");
  background-attachment: fixed;
  align-items: center;
  padding: 2rem;
  margin-bottom: 6em;
  background-size: cover;
}

#econ {
  display: flex;
  gap: 5%;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  background-color: rgba(34, 40, 48, 0.8);
  padding: 2rem;
  margin: 0 var(--margin);
  border-radius: 0.5rem;
  width: 100%;
  text-align: center;
}

#econ img {
  border-radius: 50%;
  width: 15%;
}

main {
  margin: 0 var(--margin);
  padding: 2rem;
}

main h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

main h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

#posts {
  display: flex;
  flex-wrap: wrap;
  gap: 5%;
}

.post-preview {
  width: 30%;
  margin-bottom: 5%;
}

.preview-image,
.post-image {
  width: 100%;
  border-radius: 0.5rem;
}

.preview-image {
  margin-bottom: 0.5rem;
}

.post-meta {
  margin-top: 0.5rem;
  color: var(--secondary-text);
  font-size: 0.85rem;
}

.post-meta-type {
  opacity: 0.6;
}

.post-page main {
  display: flex;
  gap: 10%;
}

#post {
  width: 70%;
  margin-bottom: 5%;
}

#viewInfographics {
  background-color: var(--secondary-bg);
  padding: 0.5rem;
  border-radius: 0.5rem;
  text-align: center;
  border: none;
  font-size: inherit;
  font-family: inherit;
  line-height: inherit;
  margin-bottom: 2rem;
  color: var(--link)
}

#viewInfographics:hover {
  background-color: var(--secondary-bg-hover);
  color: var(--link-hover);
  transition: var(--transition);
}

#infographics {
  column-count: 3;
  column-gap: 1.5rem;
}

.infographic-img {
  width: 100%;
  break-inside: avoid;
  margin-bottom: 1rem;
  border-radius: 0.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.post-page .post-meta {
  display: flex;
  gap: 5%;
  color: var(--text);
  flex-wrap: wrap;
}

.post-page .post-image {
  margin: 2rem 0;
}

.post-title {
  font-size: 2.5rem !important;
  margin-top: 0;
  margin-bottom: 2rem !important;
}

.post-page main h1 {
  font-size: 2rem;
  margin: 2rem 0 1rem;
}

.post-page main h2 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
}

.post-page main h3 {
  font-size: 1rem;
  margin: 1rem 0 1rem;
}

.post-page main h4 {
  font-size: 0.5rem;
  margin: 0.5rem 0;
}

.post-page main p, center {
  margin-bottom: 1rem;
}

.post-page main ul, .post-page main ol {
  margin-bottom: 1rem;
  margin-left: 2rem;
}

.post-page img {
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  display: block;
  border-radius: 0.5rem;
}

.post-page code {
  background-color: var(--secondary-bg);
  padding: 0.25rem;
  border-radius: 0.5rem;
}

.post-page table {
  display: block;
  border-collapse: collapse;
  overflow-x: auto;
}

.post-page td, th {
  border: 1px solid var(--secondary-text);
  padding: 0.5rem;
}

.infographic-gallery {
  display: flex;
  row-gap: 1rem;
  flex-direction: column;
}

.references {
  text-indent: -3rem;
  margin-left: 3rem;
  word-break: break-word;
  overflow-wrap: break-word;
}

#latest-post .post-preview {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  background-color: var(--secondary-bg);
  border-radius: 0.5rem;
  width: 100%;
  margin-bottom: 5%;
}

#latest-post .preview-image {
  margin-bottom: 0;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
  transition: var(--transition);
}

#categories {
  display: flex;
  gap: 1rem;
  margin-bottom: 5%;
  overflow-x: auto;
}

#categories div {
  background-color: var(--secondary-bg);
  padding: 0.5rem;
  border-radius: 0.5rem;
  text-align: center;
  min-width: 150px;
  font-size: inherit;
}

#categories div:hover {
  background-color: var(--secondary-bg-hover);
  transition: var(--transition);
}

footer {
  background-color: var(--navbar-bg);
  color: #ccc;
  padding: 2rem;
  border-top: 1px solid #2f2f44;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.4);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 15%;
  margin: 4rem var(--margin) 0 var(--margin);
}

.footer-section {
  flex: 1 1 200px;
  margin-bottom: 2rem;
}

.footer-section h4 {
  color: var(--text);
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin: 0.4rem 0;
}

.footer-section ul li a {
  color: var(--link);
}

.footer-section ul li a:hover {
  color: var(--link-hover);
  transition: var(--transition);
}

.footer-bottom {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid #2f2f44;
  margin-top: 2rem;
  font-size: 0.85rem;
  color: #888;
}

.share-buttons {
  position: sticky;
  top: 6rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 20%;
  margin-top: 3rem;
  margin-bottom: 7%;
  align-self: flex-start;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 2px solid #444;
  border-radius: 0.5rem;
  color: white;
  transition: border-color 0.2s;
}

.share-btn:hover {
  border-color: royalblue;
}

#progress-bar {
  height: 3px;
  width: 0%;
  background: royalblue;
  transition: width 0.1s ease-out;
  margin: 3rem 0;
}

#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  background-color: var(--secondary-bg);
  color: var(--text);
  border: none;
  border-radius: 0.5rem;
  width: 48px;
  height: 48px;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
}

#back-to-top:hover {
  background-color: var(--link-hover);
}


/* Media Queries */

/* Large Tablets */
@media (max-width: 1500px) {
  :root {
    --margin: 5%;
  }

  nav > div:nth-child(1) #search {
    display: none;
  }

  nav > div:nth-child(1) > div {
    justify-content: space-between;
  }

  .hamburger-button, #hamburger-menu {
    display: block;
  }

  #hamburger-menu .nav-categories {
    display: none;
  } 

  #latest-post .post-preview {
    flex-wrap: wrap;
  }
}

/* Tablets */
@media (max-width: 1150px) {
  .post-preview {
    width: 47.5%;
  }

  #infographics {
    column-count: 2;
  }
}

@media (max-width: 950px) {
  .nav-categories {
    display: none;
  }

  #hamburger-menu .nav-categories {
    display: block;
  }
}

/* Phones Portrait */
@media (max-device-width: 768px) and (orientation: portrait) {
  :root {
    --margin: 2.5%;
  }

  html, #econ, footer, main, center, nav {
    font-size: 1.5rem !important;
  }

  nav > div:nth-child(1) {
    font-size: 2rem;
    height: 6rem;
  }

  nav h4 {
    font-size: 2rem;
  }

  .nav-categories {
    display: none;
  }

  #hamburger-menu .nav-categories {
    display: block;
  }

  main h2 {
    font-size: 2.5rem;
  }

  main h3 {
    font-size: 2rem;
  }

  .post-preview {
    width: 100%;
    margin-bottom: 150px;
  }

  .post-meta {
    font-size: 0.75rem;
  }

  #searchInput {
    font-size: 1.5rem;
  }

  #searchButton {
    font-size: 1.5rem;
  }

  #latest-post .post-preview {
    margin: 0;
    padding: 0;
    margin-bottom: 150px;
    background: none;
  }

  #categories {
    margin-bottom: 150px;
  }

  #categories div {
    min-width: 300px;
  }

  #infographics {
    column-count: 1;
  }

  .post-page main {
    flex-direction: column;
  }

  .post-page .post-meta {
    font-size: 1.5rem;
  
  }

  .footer-bottom {
    font-size: 1.25rem;
  }

  .share-buttons {
    width: 100%;
    flex-direction: row;
    position: static;
    font-size: 1.5rem;
    padding: 0;
    margin-top: 2rem;
    gap: 5%;
  }

  .share-buttons p, .share-btn {
    width: 80px;
    height: 80px;
    line-height: 2;
  }

  #progress-bar {
    display: none;
  }

  #post {
    width: 100%;
  }

  #back-to-top {
    width: 5rem;
    height: 5rem;
    font-size: 1.5rem;
    /* border-radius: 50%; */
    border-radius: 1.5rem;
  }
}

/* Remove scrolling background on mobile devices */
@media (pointer: coarse) {
  .main-page header {
      background-attachment: scroll !important;
  }
}