/* Import fonts */
@import url("https://fonts.cdnfonts.com/css/sf-pro-display");
@import url("https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,100..900;1,100..900&display=swap");

/* Define styling colours  */
:root {
  --font-main-color: #2d2d2d;
  --header-footer-color: #555867;
  --search-grey: #eaeaea;
  --filter-fill: #cacfe3;
  --chip: #d6d0ff;
  --sort-text: #6148a8;
  --link: #889aff;
  --gap-1: 0.75rem;
  --gap-2: 1rem;
  --gap-3: 1.25rem;
  --gap-4: 2rem;

  /* DRY variables */
  --radius: 16px;
  --overlay-bg: rgba(0, 0, 0, 0.4);
  --transition: 0.3s ease;
  --zoom-scale: 1.1;
}

/* box sizing only */
* {
  box-sizing: border-box;
}

/* Ensure Safari / iOS do not auto-scale text and rem basis is consistent */
html {
  height: 100%;
  font-size: 18px;

  scroll-behavior: smooth;
  --webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  font-family: "SF Pro Display", sans-serif, -apple-system, BlinkMacSystemFont;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--font-main-color);
  display: flex;
  font-size: 1rem;
  flex-direction: column;
  /* Stop overscrolling */
  overscroll-behavior: none;
}

/*Heading and font styles*/

h1 {
  font-family: "Noto Serif", serif;
  font-weight: 700;
  color: var(--font-main-color);
  margin-bottom: var(--gap-4);
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-weight: 700;
  font-size: clamp(1.9rem, 2rem, 2.1rem);
  margin-bottom: var(--gap-2);
}

h3 {
  font-weight: 500;
  font-size: clamp(1.5rem, 1.6rem, 1.75rem);
  margin-bottom: var(--gap-2);
}

a {
  color: var(--link);
}
/* ^ Responsive typography for headings */

/* Header styling */
header {
  background-color: var(--header-footer-color);
  color: white;
  z-index: 1000;
  transition: top var(--transition);
  position: sticky;
  width: 100%;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  padding: var(--gap-3) var(--gap-4);
}

header .logo {
  display: flex;
  align-items: center;
  gap: var(--gap-1);
}

header a,
header p {
  text-decoration: none;
  color: white;
}

header a:hover,
header p:hover {
  text-decoration: underline;
}

/* Footer styling */
footer {
  background-color: var(--header-footer-color);
  color: white;
  width: 100%;
  padding: var(--gap-3) var(--gap-4);
}

footer p {
  padding-left: var(--gap-2);
  border-left-style: solid;
  border-left-width: 2px;
  border-left-color: white;
}

/* Main styling */
main {
  padding: var(--gap-4);
}

.column {
  column-count: 5;
  column-gap: var(--gap-1);
}

/* Responsive columns */
@media (max-width: 1000px) {
  .column {
    column-count: 3;
  }
}

@media (max-width: 600px) {
  .column {
    column-count: 1; /* single column on mobile */
  }
}

/* Image frames (wrapper) */
.column-item {
  position: relative;
  overflow: hidden;
  break-inside: avoid;
  border-radius: var(--radius);
  margin-bottom: var(--gap-1);
  width: 100%;
}

/* Image visuals (shared rules for grid images & carousel thumbnails) */
.column-item img,
.carousel-track .item img {
  display: block;
  transition: transform var(--transition);
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0; /* keep rounding on wrapper */
  will-change: transform;
}

/* Zoom only the image, clipped by wrapper (applies to both column and carousel hover) */
.column-item:hover img,
.carousel-track .item:hover img {
  transform: scale(var(--zoom-scale));
}

/* Overlay that sits above images */
.image-overlay {
  position: absolute;
  border-radius: var(--radius);
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--overlay-bg); /* 20% black fill */
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none; /* Allow hover on image */
}

.column-item:hover .image-overlay {
  opacity: 1;
}

/* Title inside overlay */
.image-title {
  color: #fff;
  font-size: 1.2em;
  font-weight: bold;
  text-align: center;
  padding: 0.5em 1em;
  border-radius: var(--radius);
}

/* Crop images exceeding a certain aspect ratio (i.e. Animation thumbnails) */
.wide {
  aspect-ratio: 1.4;
  width: 100%;
  object-fit: cover;
  object-position: left; /* start at left */
}

.wide.in-view {
  animation: panImage 60s linear forwards;
  animation-play-state: running;
}

.wide.paused {
  animation-play-state: paused;
}

@keyframes panImage {
  from {
    object-position: left;
  }
  to {
    object-position: right;
  }
}

/* Styling for item details overlay */
.overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  background: var(--overlay-bg);
  transition: opacity var(--transition);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay-content {
  position: relative;
  color: white;
  background: var(--header-footer-color);
  padding: var(--gap-4);
  width: 90%;
  max-height: 90%;
  overflow-y: auto;
  transition: opacity var(--transition);
}

/* X styling */
#closeOverlay {
  position: absolute;
  top: var(--gap-1);
  right: var(--gap-1);
  background: none;
  border: none;
  font-size: 3rem;
  cursor: pointer;
  color: white;
}

/* OVERLAY CAROUSEL STUFF */
.carousel-container {
  display: flex;
  align-items: center;
  width: 80%;
  position: relative;
}

.carousel-track {
  display: flex;
  overflow: hidden;
  width: 100%;
  gap: 1rem;
}

.carousel-track .item {
  flex: 0 0 20%;
  border-radius: 4px;
  position: relative;
  cursor: pointer;
  height: 200px;
}

/* Carousel hover handled by shared image hover rule above */

/* Arrow styling */
.arrow {
  border: solid 2px var(--font-main-color);
  background-color: var(--filter-fill);
  color: var(--font-main-color);
  font-size: 2rem;
  cursor: pointer;
  padding: 1rem;
  border-radius: 16px;
  transition: background var(--transition), color var(--transition),
    border var(--transition);
}

.arrow:hover {
  background: var(--font-main-color);
  color: var(--filter-fill);
  border: solid 2px var(--filter-fill);
}

/* Grid for overlay content */
.cella {
  display: flex;
  flex-direction: column;
  grid-area: a;
  align-items: center;
}

.cella img {
  width: 100%;
  padding-bottom: var(--gap-4);
  border-radius: 4px;
}

.cella a {
  color: var(--font-main-color);
  padding: var(--gap-1) var(--gap-2);
  background-color: var(--filter-fill);
  text-decoration: none;
  border-radius: 16px;
  outline: var(--filter-fill) solid 2px;
}

.cella a:hover {
  color: var(--filter-fill);
  background-color: var(--font-main-color);
  transition: ease 0.3s;
  outline: var(--filter-fill) solid 2px;
}

.cellb {
  grid-area: b;
}

.cellc {
  grid-area: c;
}

.cellc p,
.cellc ul {
  display: flex;
  justify-content: space-between;
  flex-direction: column;
  margin-bottom: var(--gap-1);
  gap: var(--gap-1);
}

.celld {
  grid-area: d;
}

.celld p {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--gap-1);
}

.celle {
  grid-area: e;
  overflow-wrap: break-word;
}

#overlayInner {
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto;
  gap: var(--gap-3);
  grid-template-areas:
    "a a b b"
    "a a c d"
    "a a e e ";
}

@media screen and (max-width: 768px) {
  #overlayInner {
    margin-top: var(--gap-4);
    position: relative;
    grid-template-columns: 1fr; /* single column */
    margin-bottom: 0; /* ensure no gap below */
    padding-bottom: 0; /* remove padding pushing gradient up */
    grid-template-areas:
      "a"
      "b"
      "c"
      "d"
      "e"
      "f";
  }

  /* Gradient on mobile to show more content, after used to add stuff w/ out affecting html structure */

  #overlayInner::after {
    content: "";
    position: sticky;
    bottom: -6%;
    right: 0;
    left: 0;
    width: 100%;
    height: 60px;

    background: linear-gradient(
      to bottom,
      transparent,
      var(--header-footer-color)
    );
    pointer-events: none; /* Doesn't block clicks*/
    display: block;
    margin-top: auto;
  }
}

/* Styling for abt */
.about {
  position: fixed;
  z-index: 1001;
  padding: var(--gap-4);
  width: 630px;
  color: white;
  background-color: var(--header-footer-color);
  display: block;
  overflow-wrap: break-word;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: opacity var(--transition);
}

.about button {
  position: absolute;
  top: var(--gap-2);
  right: var(--gap-2);
  background: none;
  border: none;
  font-size: 3rem;
  cursor: pointer;
  color: white;
}

.about p {
  margin-top: var(--gap-4);
  margin-bottom: var(--gap-2);
}

.about.hide {
  opacity: 0;
  pointer-events: none;
}

.about.show {
  opacity: 1;
  pointer-events: auto;
}

.bg {
  background-color: rgba(0, 0, 0, 0.4);
}

/* Responsive about */
@media screen and (max-width: 700px) {
  .about {
    width: 382px;
  }
}

/* More button styling */
#moreContainer {
  text-align: center;
  margin-top: var(--gap-3);
}

#moreBtn {
  padding: var(--gap-1) var(--gap-4);
  font-size: 1rem;
  border-radius: var(--radius);
  border: 2px solid var(--font-main-color);
  background-color: var(--chip);
  transition: 0.3s ease;
}

#moreBtn:hover {
  border: 2px solid var(--chip);
  color: var(--chip);
  background-color: var(--font-main-color);
}

/* Results stuff */
.displayinfo {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--gap-2);
}

#sortForm {
  padding: var(--gap-1);
  border: 2px solid var(--font-main-color);
  border-radius: var(--radius);
  gap: var(--gap-2);
}

#sortSelect {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;

  border: none;
  color: var(--sort-text);
  background-color: white;
  cursor: pointer;
  font-size: 1rem;
}

/* Search bar styling  */
.search {
  font-family: "SF Pro Display", sans-serif;
  position: relative;
  padding: var(--gap-1);
  border: none;
  border-radius: 24px;
  width: 350px;
  max-width: 100%;
  background-color: var(--search-grey);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.search form {
  flex: 1;
}

input {
  width: 100%;
  color: var(--font-main-color);
  border: none;
  background-color: var(--search-grey);
  font-size: 1rem;
  outline: none;
  /* z-index: 1000; */
}

#search-icon {
  cursor: pointer;
}

/* --- MOBILE BEHAVIOUR --- */
@media (max-width: 600px) {
  .search {
    width: 48px;
    justify-content: flex-end;
    transition: var(--transition);
  }

  /* Hide the search bar by default */
  .search input {
    position: absolute;
    top: 125%;
    left: -375%;
    width: 80vw;
    opacity: 0;
    padding: var(--gap-2);
    border-radius: 25px;
    border: 2px solid var(--header-footer-color);
    pointer-events: none;
  }

  /* When search is active (JS toggles this class) */
  .search.active input {
    opacity: 1;
    pointer-events: all;
  }

  header.search-open {
    padding-bottom: 5rem;
    transition: var(--transition);
  }
}

/* REDUCING PADDING  */
@media screen and (max-width: 600px) {
  header {
    padding: var(--gap-1) var(--gap-2);
  }

  footer {
    padding: var(--gap-1) var(--gap-2);
  }

  main {
    padding: var(--gap-2);
  }
}

/* Back to top button styling */

.back-to-top {
  position: fixed;
  bottom: 36px;
  right: 36px;
  padding: var(--gap-1);
  color: var(--header-footer-color);
  background-color: white;
  border: 2px solid var(--header-footer-color);
  border-radius: 50px;
  transition: 0.3s ease;
}

.back-to-top:hover {
  color: white;
  background-color: var(--header-footer-color);
  border: 2px solid white;
}