@font-face {
  font-family: cheltenham;
  src: url(./fonts/cheltenham-normal-500.ttf);
}

@font-face {
  font-family: franklin;
  src: url(./fonts/franklin-normal-500.ttf);
}

@font-face {
  font-family: imperial;
  src: url(./fonts/imperial-normal-500.ttf);
}

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

body {
  height: 100%;
}

.main {
  padding: 0 2% 9px;
}

a {
  color: #326891;
}

a:hover {
  text-decoration: none;
}

p {
  font-size: 1.25rem;
  line-height: 1.9rem;
  font-family: imperial;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.icon {
  display: block;
  width: 20px;
  height: 20px;
  background: center/cover;
}

.i-menu {
  background-image: url(./images/menu.svg);
}

.i-search {
  background-image: url(./images/magnify.svg);
}

.icon-button {
  border-radius: 3px;
  cursor: pointer;
  transition: ease 0.6s;
}

.icon-button:hover {
  background-color: #f7f7f7;
}

.rubric-link {
  font-family: sans-serif;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  text-transform: uppercase;
  color: black;
}

.rubric-link:hover {
  text-decoration: underline;
}

.cta {
  background-color: rgb(86, 123, 149);
  font-size: 11px;
  text-transform: uppercase;
  border-radius: 3px;
  border: 1px solid rgb(50, 104, 145);
  padding: 11px;
  color: white;
  font-weight: 700;
}

#main-header {
  top: 0;
  background: white;
  position: sticky;
  text-align: center;
  padding: 5px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  align-items: center;
  border-bottom: 1px solid silver;
  z-index: 777;
}

.toolbar {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  grid-gap: 15px;
}

.cta-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 10px;
}

article,
#further-readings,
#site-index,
#footer,
#sticky-footer-content {
  max-width: 1200px;
  margin: auto;
}

article {
  margin: 40px auto;
  display: grid;
  grid-template-columns: 1.3fr 2.7fr 1.3fr;
  grid-gap: 30px 10px;
}

article > * {
  grid-column: 2;
}

h1 {
  font: italic 2.5rem/3rem cheltenham;
}

figure {
  grid-column: 1 / -1;
}

figcaption {
  font-size: 0.9rem;
  font-family: imperial;
  color: #666;
  line-height: 1.25rem;
}

figcaption span {
  color: #888;
  font-size: 0.8rem;
}

img {
  max-width: 100%;
}


#credits {
  display: grid;
  grid-gap: 20px;
  grid-template-columns: repeat(3, auto);
}
#credit {
  grid-column: span 3;
}
#credit a {
  color: black;
}
.social-links {
  display: grid;
  grid-column: span 2;
  grid-auto-flow: column;
  grid-gap: 20px;
  justify-content: end;
  align-items: center;
}
.social-links a {
  display: flex;
  justify-content: center;
}
.social-links button img:hover {
  filter: invert(100%);
}
.social {
  width: 27px;
  height: 27px;
  background-color: #eee;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 5px;
}
.social:hover {
  background-color: white
}
.comments-button {
  position: relative;
  align-self: flex-start;
  width: 35px;
  height: 24px;
  border: 1px solid rgb(102, 102, 102);
  border-radius: 4px;
}
.comments-button::before {
  content: '';
  position: absolute;
  border: 4px solid rgb(102, 102, 102);
  border-bottom: 4px solid transparent;
  border-left: 4px solid transparent;
  bottom: -8px;
  right: 8px;
}
.comments-button::after {
  content: '';
  position: absolute;
  border: 3px solid rgb(255, 255, 255);
  border-bottom: 3px solid transparent;
  border-left: 3px solid transparent;
  bottom: -5px;
  right: 9px;
}
.comments-button:hover {
  border-color: silver;
}
#credits time {
  align-self: center;
  font-family: franklin;
  font-size: 0.8rem;
}
#promo {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  height: 75px;
}
#promo * {
  text-align: center;
  flex-basis: 100%;
  font: bold 15px franklin;
}
#promo p {
  align-self: flex-end;
}
#promo a {
  text-decoration: none;
}
#promo::before, #promo::after {
  content: "";
  width: 80px;''
  height: 1px;
  background-color: rgb(182, 182, 182);
}
#promo::after {
  align-self: flex-end;
}
#inner {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 0.5fr 3fr 0.5fr;
}
#inner header {
  display: grid;
  border: none;
  text-align: left;
}
#inner h1 {
  font: bold 1.25rem cheltenham;
}
#inner header p {
  font: 0.9rem/1.2rem cheltenham;
  color: #666;
}
#inner-content {
  position: relative;
}
#notes {
  top: 140px;
  position: absolute;
  display: grid;
  grid-gap: 130px 10px;
  grid-template-columns: repeat(4, 1fr);
}
.note {
  font: 300 14px/16px franklin;
  color: #000;
}
#inner footer p {
  font: 500 0.875rem/1.125rem franklin;
  color: #333;
}
#inner footer::before {
  display: block;
  margin-bottom: 13px;
  height: 1px;
  width: 50px;
  content: '';
  background-color: #000;
}
.youtube {
  grid-column: 2;
}
.youtube iframe {
  width: 100%;
  height: 35vh;
}
.smaller {
  display: grid;
  grid-template-columns: 1fr 3fr 1fr;
  grid-gap: 10px;
}
.smaller > * {
  grid-column: 2;
}
article footer p {
  margin-bottom: 30px;
  font: 0.75rem/1rem franklin;
  color: rgb(102, 102, 102);
}

article footer p a {
  color: inherit;
}

#further-readings {
  display: grid;
  grid-template:
    "astronomy astronomy  most-popular"
    "astronomy astronomy  most-popular"
    "editor-picks editor-picks most-popular" / 2fr 2fr 1.3fr;
  grid-gap: 20px 30px;
  grid-auto-flow: row;
}

#further-readings > section {
  padding-top: 20px;
  border-top: 1px solid black;
}

#astronomy, #editor-picks {
  display: grid;
  grid-gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

.further-article {
  display: grid;
  grid-gap: 8px;
}

.further-article figcaption {
  font: 10px cheltenham;
  text-align: right;
}

#further-readings h2 {
  grid-column: 1 / -1;
  font: 700 1rem/1.4rem franklin;
}

#further-readings a {
  color: black;
  text-decoration: none;
}

#further-readings h3 {
  font: 500 1.1rem/1.3rem cheltenham;
}

#further-readings a:hover {
  color: rgb(102, 102, 102);
}

.further-article span {
  color: rgb(153, 153, 153);
  font: 0.75rem/1.25rem franklin;
}

#astronomy > h2:hover {
  text-decoration: underline;
}

#astronomy {
  grid-area: astronomy;
}

#most-popular {
  display: grid;
  grid-gap: 20px;
  align-content: start;
  grid-area: most-popular;
}

#most-popular h3 {
  padding: 20px 0;
  border-top: 1px solid rgb(226, 226, 226);
}

#editor-picks {
  grid-area: editor-picks;
}

#site-index {
  padding-bottom: 15px;
  grid-gap: 10px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  /* grid-template-columns: 1fr 1fr */
}

#site-index header {
  display: flex;
  grid-column: 1 / -1;
  justify-content: space-between;
}

#site-index::before {
  margin-top: 40px;
  grid-column: 1 / -1;
  background-color: #fff;
  height: 4px;
  border-top: 2px solid #e2e2e2;
  border-bottom: 1px solid #e2e2e2;
  content: '';
  display: block;
}

#site-index .bordered {
  border-left: 1px solid rgb(226, 226, 226);
  padding-left: 15px;
}

#site-index .nav-section {
  display: grid;
  align-content: start;
  grid-gap: 20px;
}

#site-index .big-bold {
  display: grid;
  grid-gap: 15px;
}

#site-index nav {
  display: grid;
  grid-gap: 8px;
}

#site-index h3 {
  color: rgb(51, 51, 51);
  font-size: 13px;
  font-family: franklin;
  height: 25px;
  line-height: 15px;
  text-transform: uppercase;
  width: 150px;
  margin: 0px;
}

#site-index a {
  color: black;
  font-family: franklin;
  font-size: 14px;
  font-weight: 500;
  line-height: 16px;
  text-decoration: none;
}

#site-index a:hover {
  text-decoration: underline;
}

#site-index .tiny-link {
  align-self: center;
  color: rgb(86, 123, 149);
  font-size: 11px;
  font-style: normal;
  font-weight: 400;
  line-height: 11px;
  text-decoration: none;
}

.subscribe-icons {
  display: inline-block;
  height: 13px;
  width: 14px;
  margin-right: 7px;
  vertical-align: middle;
}

#site-index .big-bold a {
  font-weight: 700;
  font-size: 16px;
  line-height: 15px;
}


#site-index .tiny a {
  font-size: 11px;
}

.border-bottom {
  padding-bottom: 10px;
  border-bottom: 1px solid rgb(226, 226, 226);
}

#footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  align-items: flex-start;
}

#footer-links a {
  font: 11px franklin;
  padding-bottom: 20px;
  text-decoration: none;
  color: #666;
}

#footer {
  border-top: 1px solid #ebebeb;
  padding-top: 9px;
}

#footer-links a:hover {
  text-decoration: underline;
}

#sticky-footer {
  width: 100%;
  bottom: 0;
  position: sticky;
  border-top: 1px solid black;
  background-color: white;
}

#sticky-footer-content {
  display: grid;
  grid-template-columns: 9fr 1fr;
  align-items: center;
  text-align: center;
  height: 55px;
}

#sticky-footer-content p {
  padding: 5px;
  font: 15px/17px franklin;
}

#sticky-footer-content .text-and-button {
  cursor: pointer;
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-auto-flow: column;
  align-items: center;
}

.text-and-button button, .text-and-button span{
  padding: 5px;
}

#sticky-footer-content span {
  text-align: center;
  font-size: 11px;
  text-transform: uppercase;
  font-weight: bold;
  font-family: franklin;
}

@media(max-width: 1000px) {
  h1 {
    font-size: 1.75rem;
    line-height: 2.25rem
  }
  article {
    grid-template-columns: 0.1fr 3fr 0.1fr;
    grid-gap: 30px 10px;
  }
  artictle > * {
    grid-column: span 3;
  }
  #credits .social-links {
    grid-gap: 5px;
  }
  figure {
    display: grid;
    grid-gap: 10px;
    grid-template-columns: 0.1fr 3fr 0.1fr;
  }
  figure img {
    grid-column: span 3;
  }
  figcaption {
    grid-column: 2;
  }

  .search-button, .rubric-link {
    display: none;
  }
  .toolbar {
    flex-basis: 6%;
  }
  .logo-link {
    flex-basis: calc(94% - 12px);
  }
  .cta-buttons {
    flex-basis: 100%;
  }
  #inner {
    grid-template-columns: 1fr;
    grid-column: 1 / 3;
  }
  #drawings {
    width: 100%;
  }
  #notes {
    position: static;
    grid-template-columns: 1fr;
    grid-gap: 20px;
  }
  .article {
    grid-column: 2;
  }

  .youtube {
    display: grid;
  }

  .youtube > * {
    grid-column: 1 / -1;
  }
  .youtube iframe {
    width: 100%;
  }
  .smaller > * {
    padding: 5px;
    grid-column: span 3;
  }

  #site-index {
    grid-template-columns: 1fr 1fr;
    grid-gap: 30px;
  }

  #editor-picks {
    grid-column: 1 / -1;
  }
}