/***
 This code runs the overview view in
 index.html.

 NOT INTENDED TO BE MODIFIED BY STUDENTS
 (though if you want to change colors or 
 fonts or something, feel free)
***/

html {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

body {
  margin: 0;
  padding: 0;
}
main iframe {
  width: 100%;
  height: calc(100vh - 68px);
  border: none;
}

main {
  padding: 8px;
}

.sbs main > div {
  border: 1px inset;
}

nav {
  margin: auto;
  display: flex;
  padding: 10px;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid #ddd; /* Adds a bottom border for the tab container */
}

nav a {
  padding: 10px 15px;
  color: #333;
  text-decoration: none;
  border-bottom: 3px solid transparent; /* Transparent border initially */
  margin-right: 20px;
  font-size: 16px;
  transition: border-color 300ms, color 300ms;
}

nav a:hover {
  color: #007bff; /* Change color on hover */
}

nav a.active {
  border-bottom: 3px solid #007bff; /* Underline active tab */
  color: #007bff;
}

.center figure {
  display: grid;
  grid-template-rows: 1fr auto; /* Image stretches, caption gets auto height */
  grid-template-columns: 1fr; /* Single column */
  align-items: center; /* Align items within their grid cells */
  justify-items: center;
  max-width: 100%; /* Prevent figure from overflowing horizontally */
  max-height: 100%; /* Prevent figure from overflowing vertically */
  margin: 0; /* Remove default margin */
  box-sizing: border-box;
  overflow: hidden; /* Prevent overflow */
}

.center img {
  max-width: 100%; /* Ensure the image doesn’t overflow horizontally */
  min-height: 100%; /* Force the image to fill the available height */
  max-height: 100%; /* Ensure the image doesn’t overflow vertically */
  width: auto; /* Maintain aspect ratio */
  object-fit: contain; /* Ensure the image fits nicely */
  grid-row: 1; /* Place the image in the first row */
}

.center figcaption {
  max-width: 100%; /* Ensure caption doesn’t overflow */
  word-wrap: break-word; /* Handle long words or links gracefully */
  text-align: center; /* Center-align the caption text */
  margin: 8px 0; /* Add spacing */
  font-size: 14px; /* Adjust font size as needed */
  grid-row: 2; /* Place the caption in the second row */
}

.content {
  opacity: 0;
  pointer-events: none;
}
.visible {
  display: block;
  opacity: 1;
  pointer-events: all;
  transition: opacity 500ms;
}
main {
  position: relative;
}
main div {
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% - 4px);
  height: calc(100vh - 66px);
}

/* Side-by-side code */

.sbs main {
  display: flex;
  gap: 10px;
}
/* Get rid of absolute positioning we used for cross-fade */
.sbs div {
  position: initial;
  box-sizing: border-box;
}
/* Just toggle display : block to display: none
Old-school style... */
.sbs .content {
  display: none;
}
.sbs .visible {
  display: block;
}
/* ALWAYS show the original */
.sbs #original {
  display: block;
  opacity: 1;
}
.orig-link {
  transition: opacity 300ms;
}
/* Don't show the original tab */
.sbs .orig-link {
  opacity: 0;
}
.sbs-toggle {
  transition: opacity 300ms;
}
.original .sbs-toggle {
  opacity: 0;
}

/* Popout link code */
header {
  position: sticky;
  top: 0;
  height: 48px;
}
.popout-bar {
  opacity: 0;
  transition: opacity 300ms;
}
header:hover .popout-bar {
  opacity: 1;
}
.popout-bar {
  display: flex;
  margin: auto;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.popout-link {
  display: none;
  position: absolute;
  right: -16px;
  top: 0;
  padding-top: 0;
  margin-top: -4px;
}
nav span {
  position: relative;
}
.imitation .popout-link.imitation {
  display: inline-block;
}
.responsive .popout-link.responsive {
  display: inline-block;
}

#minimize {
  transition: transform 300ms;
  background: transparent;
  border: none;
}
header.minimized #minimize {
  transform: rotate(180deg);
}
header {
  transition: transform 300ms;
  z-index: 2;
}
header nav {
  height: 48px;
  box-sizing: border-box;
}
.minimized {
  transform: translateY(-48px);
}
.popout-link::after {
  content: "↗";
  font-size: 8px;
  vertical-align: super;
}