/* 
 * index.css - Provides styling for artist gallery interface and components
 * Implements dark theme, responsive layout, and interactive element states
 */

/*** Base Variables & Global Styles *******************************************/

/* Theme color definitions */
:root {
  --ce-primary-background-color: #000025; /* Main background/darkest shade */
  --ce-primary-font-color: #5fb3ce; /* Primary text color */
  --ce-secondary-background-color: #000099; /* Secondary elements/header */
  --ce-secondary-font-color: #d2d2d2; /* Secondary text */
  --ce-third-background-color: #1c4a91; /* Card backgrounds */
  --ce-third-font-color: #c4c4c4; /* Tertiary text */
}

/* Global page layout */
html,
body {
  background-color: var(--ce-primary-background-color);
  color: var(--ce-primary-font-color);
  padding: 0;
  margin: 0;
  overflow: hidden; /* Prevent default page scrolling */
  min-width: 250px; /* Minimum mobile-friendly width */
}

/*** Overlay Components *******************************************************/

/* Semi-transparent backdrop for modal interactions */
#backdrop {
  background-color: rgba(0, 0, 0, 0.5);
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 7; /* Mid-layer positioning */
  display: none; /* Hidden by default */
}

#backdrop.show {
  display: block; /* Activated via JavaScript */
}

/*** Header Styles ************************************************************/

/* Header styling */
header {
  background-color: var(--ce-secondary-background-color);
  height: 3rem; /* Fixed header height */
  z-index: 10; /* Ensure header stays on top */
  position: fixed;
  width: 100%;
}

/* Header title styling */
h1 {
  margin: 0;
  padding: 0.5rem;
}

/* Header span styling */
header > span {
  padding: 0.5rem;
  position: absolute;
  top: 0;
  right: 0;
  height: 37px;
  display: flex;
}

/* Header button styling */
header button {
  background-color: var(--ce-secondary-background-color);
  border-style: solid;
  color: var(--ce-third-font-color);
  border-radius: 0.5rem;
  cursor: pointer;
}

/* Header button hover effect */
header button:hover {
  background-color: var(--ce-primary-background-color);
}

/*** Navigation Components ****************************************************/

/* Navigation bar styling */
nav {
  margin: -0.3rem 0.5rem 0 0.5rem;
  position: relative;
  min-height: 27px;
  display: flex;
}

/* Hidden navigation bar */
nav[hidden] {
  display: none;
}

/* Navigation span and content filters styling */
nav > span,
nav > div.content-filters > span {
  margin-top: 0.55rem;
  display: inline-block;
  z-index: 2;
  position: relative;
}

/* Navigation span and content filters hover effect */
nav > span:hover,
nav > div.content-filters > span:hover {
  background-color: var(--ce-primary-background-color);
}

/* Checked radio button styling */
nav > span input[type="radio"]:checked + label,
nav > div.content-filters > span input[type="radio"]:checked + label {
  border-color: var(--ce-primary-font-color);
}

/* Navigation label styling */
nav > span label,
nav > div.content-filters > span label {
  padding: 0.5rem;
  margin: 0;
  cursor: pointer;
  background-color: var(--ce-secondary-background-color);
  border: 1px solid var(--ce-primary-background-color);
  border-radius: 0 0 0.5rem 0.5rem;
}

/* Hide radio button input */
nav > span input,
nav > div.content-filters > span input {
  display: none;
}

/* Search bar styling */
nav > div.search-bar {
  display: inline-flex;
  position: absolute;
  right: 1rem;
  padding: 0.5rem;
  background-color: var(--ce-secondary-background-color);
  border: 1px solid var(--ce-primary-background-color);
  border-radius: 0 0 0.5rem 0.5rem;
  z-index: 10;
}

/* Search bar results padding */
nav > div.search-bar #results {
  padding: 0 0.5rem;
}

/* Search bar dropdown list styling */
nav > div.search-bar:last-child ul {
  position: absolute;
  right: 0;
  top: 37px;
  display: flex;
  flex-flow: column nowrap;
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 250px;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Search bar dropdown list item styling */
nav > div.search-bar:last-child ul li {
  background-color: var(--ce-secondary-background-color);
  padding: 1rem 0.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
}

/* Search bar dropdown list item hover and selected effect */
nav > div:last-child ul li:hover,
nav > div:last-child ul li.selected {
  background-color: var(--ce-primary-background-color);
}

.bumper {
  width: 100%;
  height: 5rem;
}

/*** Main Gallery Layout ******************************************************/

/* Main content area styling */
main {
  height: calc(100vh - 3.33rem); /* Full viewport minus header */
  position: relative;
}

/* Gallery container styling */
main > #gallery {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-evenly;
  overflow-y: auto;
  overflow-x: hidden;
  max-height: calc(100vh - 3.33rem);
  margin-top: -2rem;
  z-index: 1;
  position: relative;
}

/* Gallery push element styling */
main > #gallery .push {
  display: block;
  margin-top: 2.5rem;
  width: 100%;
}

/* Gallery card and preview styling */
main > #gallery .card,
main > #gallery .preview,
main > #gallery .stat-part {
  text-align: center;
  border-radius: 1rem;
  min-width: 300px;
  max-width: 300px;
  min-height: 300px;
  max-height: 300px;
  margin: 0.5rem auto;
  overflow: hidden;
  cursor: pointer;
}

/* Gallery image container styling */
main > #gallery .card .img-div,
main > #gallery .preview .img-div {
  background-color: var(--ce-third-background-color);
  position: relative;
  overflow: hidden;
  height: 100%;
  align-content: space-evenly;
  display: block;
}

/* Gallery image styling */
main > #gallery .card .img-div img,
main > #gallery .preview .img-div img {
  width: 100%;
}

/* Gallery audio and video styling */
main > #gallery .preview .img-div audio,
main > #gallery .preview .img-div video {
  width: 100%;
}

/* Gallery card and preview before pseudo-element styling */
main > #gallery .card::before,
main > #gallery .preview::before,
main > #gallery .stat-part::before {
  content: attr(id);
  display: block;
  padding: 0 0.5rem;
  background: var(--ce-secondary-background-color);
  border-radius: 1rem 1rem 0 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Gallery card and preview searched animation */
main > #gallery .card.searched,
main > #gallery .preview.searched {
  animation-duration: 0.8s;
  animation-name: flash;
  animation-iteration-count: 10;
  transition: none;
}

/* Gallery card and preview span styling */
main > #gallery .card span,
main > #gallery .preview span {
  display: inline-block;
  height: 100%;
  vertical-align: middle;
}

main > #gallery .stat-part {
  border: 1px solid var(--ce-third-background-color);
  max-height: none;
}

main > #gallery #TOTAL.stat-part {
  max-width: unset;
  width: 100%;
}

main > #gallery .stat-part > p {
  margin: unset;
  background-color: var(--ce-third-background-color);
  padding: 0.5rem 0;
}

main > #gallery .stat-part div {
  font-size: large;
}

main > #gallery .stat-part label {
  cursor: pointer;
  display: block;
}

main > #gallery .stat-part > span:not(:first-child) input + label::after {
  content: "►";
  padding: 0 0.5rem;
  font-size: xx-small;
  vertical-align: middle;
}

main > #gallery .stat-part ul {
  display: none;
  list-style: none;
  text-align: justify;
  overflow-y: auto;
  overflow-x: hidden;
  max-height: 10rem;
  background-color: var(--ce-primary-background-color);
}

main > #gallery .stat-part ul li {
  padding: 0.5rem 0;
  padding-left: 40px;
}

main
  > #gallery
  .stat-part
  > span:not(:first-child)
  input:checked
  + label::after {
  content: "▼";
}

main > #gallery .stat-part input[type="checkbox"]:checked ~ ul {
  display: block;
  padding: unset;
}

main > #gallery .stat-part input {
  display: none;
}

/* Responsive styling for smaller screens */
@media (max-width: 722px) {
  main > #gallery .card,
  main > #gallery .preview {
    text-align: center;
    border: 1px solid var(--ce-secondary-background-color);
    border-radius: 1rem;
    margin: 0.5rem 0;
    min-width: 200px;
    max-width: 200px;
    max-height: 200px;
    overflow: hidden;
  }
}

/*** Loading Animation ********************************************************/

/* Centered text alignment */
.centered {
  text-align: center;
}

/* Spinner styling */
.spinner {
  display: none;
  padding: 50px;
  text-align: center;
  z-index: 5;
  position: absolute;
  top: 50%;
  left: calc(50% - 45px);
}

/* Spinner loading state */
.spinner.loading {
  display: block;
}

/* Spinner number styling */
#spinnerNumber {
  width: 90px;
  position: absolute;
  top: calc(50% - 15px);
  left: calc(50% - 50px);
  display: inline-flex;
  justify-content: center;
  flex-flow: row wrap;
}

/* Spinner load styling */
#spinnerLoad {
  top: calc(-33% - 15px);
  left: calc(50% - 45px);
  position: absolute;
  display: flex;
}

/* Spinner progress more styling */
#spinnerLoad #progressMore {
  display: flex;
  flex-flow: row wrap;
  width: 90px;
}

/* Spinner loading animation */
.spinner.loading:before {
  content: "";
  height: 90px;
  width: 90px;
  margin: -15px auto auto -15px;
  position: absolute;
  top: calc(50% - 45px);
  left: calc(50% - 45px);
  border-width: 8px;
  border-style: solid;
  border-color: var(--ce-third-background-color) var(--ce-third-font-color)
    var(--ce-third-font-color);
  border-radius: 100%;
  animation: rotation 0.7s infinite linear;
}

/*** Keyframe Animations ******************************************************/

/* Rotation animation */
@keyframes rotation {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(359deg);
  }
}

/* Flash animation */
@keyframes flash {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  } /* Create blinking effect */
}