/* ---------------------------------------------
   General Layout
--------------------------------------------- */

body {
  background-color: #faf0be;
  font-family: Arial, sans-serif;
  color: #333;
  margin: 0;
  padding: 0;

  /* Optional grid pattern */
  background-image: linear-gradient(rgba(0, 0, 250, 0.03) 1px, transparent 1px),
    linear-gradient(to right, rgba(0, 0, 250, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
}

header {
  background-color: #333;
  color: white;
  padding: 15px;
  text-align: center;
}

main {
  min-height: calc(
    100vh - 180px
  ); /* Ajuste selon la hauteur du header et footer */
}

footer {
  margin-top: 50px;
  padding: 20px;
}

/* ---------------------------------------------
   Navbar Styles
--------------------------------------------- */

.navbar-custom {
  backdrop-filter: blur(10px);
  box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
}

.navbar-custom .nav-link {
  transition: color 0.3s ease-in-out;
}

/* old: ffdd57 */

.navbar-custom .nav-link:hover {
  color: var(--bs-warning) !important;
}

.navbar-custom .nav-link.active {
  color: var(--bs-warning) !important;
  font-weight: bold;
  border-bottom: 3px solid var(--bs-warning);
}

.nav-link.active {
  color: var(--bs-warning) !important;
  font-weight: bold;
  border-bottom: 3px solid var(--bs-warning);
}

.navbar-custom .social-icons a {
  transition: transform 0.3s ease-in-out;
}

.navbar-custom .social-icons a:hover {
  transform: scale(1.2);
}

.navbar-toggler {
  font-weight: bold;
}

.social-icons {
  gap: 0.25rem;
}

/* ---------------------------------------------
   Icon Sizes
--------------------------------------------- */

.icon-size {
  font-size: 1.5rem;
}

.icon-size-lg {
  font-size: 1.75rem;
}

/* ---------------------------------------------
   Homepage
--------------------------------------------- */

.homepage-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
  text-align: center;
}

/* ---------------------------------------------
   Dynamic Typing Text
--------------------------------------------- */

.dynamic-text {
  display: inline-block;
  font-weight: bold;
  overflow: hidden;
  white-space: nowrap;
  padding-right: 5px;
  position: relative;
  min-height: 4rem;
  animation: slideText 4s infinite;
}

.dynamic-text::after {
  content: '|';
  position: absolute;
  right: 0;
  animation: blink 0.7s infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ---------------------------------------------
   Emoji Style
--------------------------------------------- */

.emoji {
  font-family: 'Segoe UI Emoji', 'Apple Color Emoji', sans-serif;
  filter: grayscale(100%);
}

/* ---------------------------------------------
   Timeline
--------------------------------------------- */

.timeline {
  width: 150px;
  position: sticky;
  top: 20px;
  border-left: 3px solid #ccc;
  padding-left: 20px;
}

/* ---------------------------------------------
   Mosaic Background
--------------------------------------------- */

.mosaic {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 4px;
  overflow: hidden;
  z-index: -1;
}

.mosaic-item {
  width: 100%;
  height: 100px;
  background-size: cover;
  background-position: center;
  transition: transform 0.3s ease-in-out;
}

.mosaic-item:hover {
  transform: scale(1.1);
}

/* ---------------------------------------------
   Cards and Layout
--------------------------------------------- */

.card-transparent {
  background-color: rgba(255, 255, 255, 0.4);
}

.card {
  border: none !important;
}

.card_image {
  position: relative;
  overflow: hidden;
}

.card_image::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(100, 100, 100, 0.50),
    rgba(255, 255, 255, 0.8)
  );
  z-index: 1;
  pointer-events: none;
}


.card_image > * {
  position: relative;
  z-index: 2;
}

.project-title-bg {
  background-color: rgba(255, 255, 255, 0.9);
  display: inline-block;
  padding: 4px 8px;
  border-radius: 5px;
}

/* ---------------------------------------------
   Table Styling
--------------------------------------------- */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.95rem;
}

table th,
table td {
  border: 1px solid #ccc;
  padding: 8px 12px;
  text-align: left;
}

table th {
  background-color: #f4f4f4;
  font-weight: bold;
}

table tr:nth-child(even) {
  background-color: #fafafa;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  display: block;
  -webkit-overflow-scrolling: touch;
}

/* ---------------------------------------------
   Citation / References
--------------------------------------------- */

.citation {
  font-style: italic;
  color: #444;
}

#references {
  margin-top: 3rem;
  border-top: 1px solid #ddd;
  padding-top: 1rem;
}

#references h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

#references ul {
  list-style: none;
  padding: 0;
}

#references li {
  margin-bottom: 1rem;
  line-height: 1.4;
  font-size: 0.95rem;
}

#references a {
  text-decoration: none;
  color: #1a0dab;
}

#references a:hover {
  text-decoration: underline;
}

/* ---------------------------------------------
   Tags Section (e.g., Article list)
--------------------------------------------- */

.title-tags {
  font-size: 18px;
  font-weight: bold;
  padding-bottom: 10px;
  /* Optional styles you had commented out */
  /* color: #333; */
  /* text-align: center; */
  /* border-bottom: 2px solid var(--bs-primary); */
}

/* ---------------------------------------------
   section Home page
--------------------------------------------- */

/* Section Indicator Styles */
.section-indicator {
  position: fixed;
  top: 50%;
  left: 20px;
  transform: translateY(-50%);
  z-index: 999;
}

.section-indicator ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.section-indicator li {
  margin: 20px 0;
  text-align: center;
}

.section-indicator a {
  display: block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--bs-secondary);
  border-radius: 50%;
  background-color: white;
  transition: background-color 0.3s, border-color 0.3s;
  text-indent: -9999px;
  overflow: hidden;
}

.section-indicator a.active {
  background-color: var(--bs-primary);
  border-color: var(--bs-primary);
}

.year-heading {
  transition: background-color 0.3s, color 0.3s;
  padding: 0.5rem 1rem;
  border-left: 4px solid transparent;
}

.year-heading.active {
  background-color: #e3f2fd;
  border-left-color: #0d6efd;
  color: #0d6efd;
}

.equation-scroll-wrapper {
  overflow-x: auto;
  width: 100%;
  display: block;
}

.equation-block {
  display: inline-block;
  white-space: nowrap;
  min-width: 100%;
}

.refer-box {
  border: 1px solid var(--bs-primary);
  padding: 1em;
  margin: 1.5em 0;
  border-radius: 4px;
}

.refer-box p {
  margin: 0;
}

a.badge[disabled] {
  pointer-events: none;
  text-decoration: none; /* remove underline */
  cursor: default;
}

.hover-shadow:hover {
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.3s ease;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  scroll-margin-top: 80px;
}

#clearSelectedTag {
  filter: invert(1) brightness(200%); /* pure white */
  opacity: 1; /* fully visible */
  transform: scale(1.1); /* slightly bigger */
}


.header-badge {
  font-size: 0.75rem;
}

.hero-section {
  display: flex;
  flex-direction: column;
  justify-content: center; /* centre vertical */
  align-items: center; /* centre horizontal */
  position: relative;
  padding: 0; /* IMPORTANT */
  margin: 0; /* IMPORTANT */
}

.hero-section {
  position: relative;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 3px solid var(--bs-primary);
  border-radius: 30px;

  display: flex;
  justify-content: center;
  position: relative;

  margin-top: 5%;
  padding-top: 8px;
  opacity: 1.0;
  z-index: 9999;             
}

.scroll-indicator span {
  width: 6px;
  height: 6px;
  background: var(--bs-primary);
  border-radius: 50%;
  animation: scrollBounce 2s infinite;
} 


@keyframes scrollBounce {
  0%   { transform: translateY(0); opacity: 1; }
  50%  { transform: translateY(10px); opacity: 0.4; }
  100% { transform: translateY(0); opacity: 1; }
}


@media (max-width: 768px) {
  .hero-section {
    min-height: auto !important;
    padding-top: 80px;
    padding-bottom: 40px;
  }

  .scroll-indicator {       
    display: none !important;
  }
}