/* Reset and base styles */

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

body, html {
  height: 100%;
  font-family: 'Poppins', sans-serif;
  background-color: #f8f9fa;
  color: #333;
  /* overflow: scroll; */
}

.content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  animation: fadeIn 1.5s ease-out;
}

.wrapper {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content:first baseline;
}

/* Navigation and Header */
header {
  background: #007bff;
  color: #fff;
  padding: 20px 0;
  text-align: center;
  /* height: 30%; */
}

header nav {
  display: flex;
  justify-content: center;
  gap: 30px;
}

header nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease-in-out;
}

header nav a:hover,
header nav a:focus { /* Added focus for accessibility */
  color: #cce;
  outline: none; /* Optionally remove outline and replace with a more visually appealing focus indicator */
}

.header-content h1, .header-content p {
  margin: 20px 0;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Badge Styling for a Gold Bar Effect */
.badge {
  position: relative;
  background: linear-gradient(145deg, #ffd700 20%, #ffdf00 40%, #ffdd00 50%, #ffdf00 60%, #ffd700 80%);
  color: #004085; /* Adjusted color for better visibility on gold */
  padding: 0px 3px;
  border-radius: 2px;
  font-size: 0.4em;
  vertical-align: super;
  margin-left: 4px;
  display: inline-block;
  box-shadow: inset 0 0 4px #c79300; /* Inner shadow for depth */
  border: 1px solid #c79300; /* Slight border for definition */
  overflow: hidden; /* Ensures pseudo-elements don't overflow the badge's boundaries */
}

/* Inner Glow Effect */
.badge::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 2px; /* Match the badge's border-radius */
  background: linear-gradient(45deg, rgba(255, 244, 214, 0.7), rgba(255, 255, 255, 0.7), rgba(255, 244, 214, 0.7));
  opacity: 0.7;
  filter: blur(3px);
  z-index: -1;
  animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
  0%, 100% { opacity: 0.7; transform: scale(1); filter: blur(3px); }
  50% { opacity: 0.9; transform: scale(1.05); filter: blur(5px); }
}

/* External Shine Effect */
.badge::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.8), transparent);
  animation: shine 4s linear infinite;
  border-radius: 2px;
}

@keyframes shine {
  from { transform: rotate(0deg) translateX(-50%); }
  to { transform: rotate(360deg) translateX(-50%); }
}

.paper-link {
  display: inline-block;
  background-color: #007bff; /* Primary color for consistency */
  color: #ffffff; /* White text for contrast */
  padding: 8px 16px; /* Reduced padding for a smaller button */
  border-radius: 20px; /* Adjusted border-radius for aesthetic consistency with the smaller size */
  font-weight: 600; /* Bold text */
  font-size: 0.9em; /* Optionally adjust font size for better fit */
  text-decoration: none; /* Removes underline from the link */
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2); /* Defined shadow for depth */
  transition: all 0.3s ease; /* Smooth transition for hover effects */
}

.paper-link:hover, .paper-link:focus {
  background-color: #0056b3; /* Darker shade on hover/focus for interaction feedback */
  color: #ffffff;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25); /* Larger shadow for a "lifting" effect */
  transform: translateY(-2px); /* Slightly raises the button */
  outline: none; /* Consider accessibility alternatives */
}

.paper-link:active {
  background-color: #004494; /* Even darker for the active state */
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); /* Smaller shadow to simulate "pressing" down */
  transform: translateY(1px); /* Moves the button down */
}

.paper-links {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.paper-links .paper-link {
  margin: 0;
}

.main-content {
  display: flex;
  padding: 20px 50px;
}

/* Enhanced Category List Styling */
.category-list {
  flex: 1;
  padding: 0 30px;
  max-width: 300px; /* Limit width for better readability */
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.category-list h2 {
  margin-bottom: 30px;
  color: #2c3e50; /* Darker shade for contrast */
  font-size: 24px; /* Slightly larger for emphasis */
  font-weight: bold; /* Make the header bold */
}

.category-list ul {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%; /* Ensure the list fills the container */
}

.category-list ul li {
  margin-bottom: 15px;
  width: 100%; /* Ensure the list items fill the container */
}

.category-list ul li a {
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  color: #ffffff;
  background-image: linear-gradient(to right, #ff5f6d, #ffc371);
  padding: 10px 20px;           /* consistent padding across states */
  border-radius: 25px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-image 0.25s ease;
  font-weight: bold;
  width: 100%;
  box-sizing: border-box;      /* include border in width calculations */
  position: relative;
  z-index: 1;

  /* Prevent the label from wrapping and changing height/width */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;

  /* Reserve border space so switching to a visible border won't change box size */
  border: 2px solid transparent;
  font-size: 1rem;             /* keep font-size constant to avoid reflow */
}

.category-list ul li a:hover, .category-list ul li a:focus {
  background-image: linear-gradient(to right, #ffc371, #ff5f6d); /* Reverse gradient for interactive effect */
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15); /* Slightly larger shadow for a "pop" effect */
  transform: translateY(-3px); /* Subtle lift effect on hover */
}

.category-list ul li a.active {
  transform: translateX(6px); /* nudge visually, avoid scale which can reflow/trigger wrap */
  box-shadow: 0 18px 40px rgba(99, 102, 241, 0.18), 0 6px 18px rgba(0,0,0,0.12);
  background-image: linear-gradient(90deg, #7c3aed 0%, #5b21b6 50%, #3b82f6 100%);
  color: #fff;

  /* Use the reserved border (same width) but visible color instead of changing box size */
  border-color: rgba(124, 58, 237, 0.9);
  padding: 10px 20px;
}

/* Slight text emphasis for the active label */
.category-list ul li a.active span,
.category-list ul li a.active strong {
  font-weight: 800;
}

/* Ensure hover remains pleasant for non-active and active items */
.category-list ul li a:hover:not(.active),
.category-list ul li a:focus:not(.active) {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.12);
}

.category-list ul li a:active {
  /* Immediate feedback on click, before active class is applied */
  transform: scale(0.95); /* Mimic pressing effect */
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); /* Subtle shadow for depth */
}

.new-category {
  animation: soft-glow 2s infinite alternate;
  border: 2px solid #A18CD1; /* soft purple */
  border-radius: 25px;
  transition: all 0.3s ease;
}

@keyframes modern-violet-glow {
  0% {
    box-shadow: 0 0 4px rgba(192, 132, 252, 0.4), 0 0 8px rgba(124, 58, 237, 0.4);
  }
  50% {
    box-shadow: 0 0 8px rgba(192, 132, 252, 0.7), 0 0 16px rgba(124, 58, 237, 0.7);
  }
  100% {
    box-shadow: 0 0 4px rgba(192, 132, 252, 0.4), 0 0 8px rgba(124, 58, 237, 0.4);
  }
}

.new-category {
  animation: modern-violet-glow 3.5s infinite alternate;
  border: 2px solid #c084fc; /* Light neon violet */
  border-radius: 25px;
  transition: all 0.3s ease;
}

.new-paper-badge {
  background: linear-gradient(to right, #c084fc, #7c3aed); /* Violet gradient */
  color: white;
  font-size: 0.65rem;
  font-weight: bold;
  padding: 2px 6px;
  margin-left: 8px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  animation: soft-glow-new-paper 3s infinite alternate ease-in-out;
}

/* subtle breathing animation for the badge */
@keyframes soft-glow-new-paper {
  0% {
    box-shadow: 0 0 4px rgba(192, 132, 252, 0.5);
  }
  50% {
    box-shadow: 0 0 8px rgba(124, 58, 237, 0.7);
  }
  100% {
    box-shadow: 0 0 4px rgba(192, 132, 252, 0.5);
  }
}


.papers-list {
  display: flex;
  flex-direction: column;
  gap: 20px; /* Adjust space between paper entries */
}

.papers-list .paper-entry:first-child {
  margin-top: 20px; /* Adds space above the first paper entry */
}

.paper-entry {
  background-color: #f9f9f9; /* Light background for each entry */
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* Soft shadow for depth */
  border-radius: 8px; /* Rounded corners */
  padding: 20px; /* Padding around the content */
  transition: transform 0.2s ease, box-shadow 0.2s ease; /* Smooth transitions for hover effects */
}

.paper-entry:hover {
  transform: translateY(-5px); /* Slight raise effect on hover */
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); /* Enhanced shadow on hover */
}

.paper-content h4 a {
  color: #007bff; /* Keep the link color for consistency */
  text-decoration: none; /* Removes underline */
}

.paper-content p {
  color: #333; /* Maintain readability */
}

.paper-year {
  display: block; /* Display year on its own line */
  margin-top: 10px; /* Space between authors and year */
  font-weight: bold; /* Make the year stand out */
}

.team-section {
  text-align: center;
  padding: 50px;
  background-color: #f4f4f4; /* Light grey background */
}

.team-section h2 {
  margin-bottom: 30px; /* Adjust this value as needed */
}

.team-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px; /* Adjust based on your preference */
}

.team-member {
  width: 200px;
  padding: 20px;
  background-color: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
  position: relative; /* Needed for absolute positioning of the pseudo-element */
  margin-bottom: 30px; /* Ensure there's space below for the pseudo-element */
  overflow: hidden; /* Ensures the pseudo-element's curvature blends into the card */
}

.team-member::after {
  content: "";
  position: absolute;
  bottom: -5px; /* Slightly overlaps the bottom of the card */
  left: 0;
  width: 100%;
  height: 10px; /* Gives enough space for the gradient and curvature */
  background: linear-gradient(
    270deg, 
    #ff5f6d, #ffc371, #24C6DC, #514A9D, 
    #FF5F6D, #FFC371, #24C6DC, #514A9D
  ); /* Repeating the colors for a continuous effect */
  background-size: 400% 100%;
  animation: moveStreak 30s ease infinite;
  border-radius: 5px 5px 0 0; /* Curved to blend with the card */
}

@keyframes moveStreak {
  0% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.team-member img {
  width: 100px; /* Adjust based on your preference */
  height: 100px; /* Keeping width and height the same for a circle */
  border-radius: 50%; /* Creates the circle shape */
  object-fit: cover; /* Ensures the image covers the space well */
  margin-bottom: 15px; /* Space between the image and the text */
}

.team-member h3, .team-member p {
  margin: 5px 0; /* Adjust the spacing as needed */
}

.team-member:hover {
  transform: scale(1.05); /* Slight increase in size on hover for effect */
}

.contact-section {
  max-width: 900px;
  margin: 40px auto;
  padding: 20px;
  background: #f0f4f8;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-section h2, .contact-section h3 {
  color: #333;
}

.contact-section .intro, .contact-section p {
  color: #555;
  font-size: 16px;
  line-height: 1.5;
}

.contact-methods {
  display: flex;
  margin-top: 20px;
  gap: 20px;
}

.contact-methods > div {
  flex: 1;
  background: white;
  padding: 15px;
  border-radius: 5px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.contact-methods h3 {
  margin-top: 0;
}

.email a, .github a {
  color: #007bff; /* A pleasant, clickable blue. Adjust color as needed */
  font-weight: bold; /* Makes the text slightly bolder */
  text-decoration: none; /* Removes underline */
  padding: 2px 0; /* Minimal padding to not disrupt line height much */
  border-bottom: 2px solid transparent; /* Invisible border for a smooth transition on hover */
  transition: border-color 0.3s ease, color 0.3s ease; /* Smooth transitions for color and border */
}

.email a:hover, .github a:hover {
  color: #0056b3; /* A darker shade of blue for hover state */
  border-color: #0056b3; /* Makes the underline appear on hover */
}

.github-link {
  display: inline-block;
  background: linear-gradient(45deg, #6a11cb 0%, #2575fc 100%);
  color: white;
  padding: 10px 15px;
  border-radius: 25px;
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  transition: transform 0.2s ease-in-out;
}

.github-link:hover {
  transform: scale(1.05);
}

.follow-us {
  margin-top: 20px;
  font-weight: bold;
  text-align: center;
}

.github-link {
  width: 100%;
  text-align: center;
  margin-top: 10px;
}

.popup-message {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #f8f9fa;
  color: #333;
  padding: 20px 50px 20px 20px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  border: 1px solid #dee2e6;
  z-index: 1000;
  max-width: 600px;
  text-align: left;
  line-height: 1.5;
}

.popup-close {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  right: 15px;
  border: none;
  background: none;
  color: #666;
  font-size: 28px;
  cursor: pointer;
  font-weight: bold;
  line-height: 1;
  transition: color 0.2s ease;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.popup-close:hover {
  color: #333;
}

.popup-message strong {
  color: #007bff;
  margin-right: 5px;
}

.year-selector {
  display: flex;
  justify-content: center;
  margin: 20px 0;
}

.year-btn {
  background-color: #f0f0f0;
  border: none;
  padding: 10px 20px;
  margin: 0 5px;
  font-size: 1rem;
  font-family: 'Poppins', sans-serif;
  cursor: pointer;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.year-btn.active {
  background-color: #0077cc;
  color: #fff;
}

.year-btn:hover {
  background-color: #005fa3;
  color: #fff;
}

.leaderboard-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 20px 50px 20px;
}

.leaderboard-table {
  width: 90%;
  max-width: 1200px;
  border-collapse: collapse;
  background-color: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 10px;
  overflow: hidden;
}

.leaderboard-table th, .leaderboard-table td {
  padding: 15px 20px;
  text-align: center;
  border-bottom: 1px solid #dee2e6;
}

.leaderboard-table th {
  background-color: #007bff;
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.leaderboard-table tr:last-child td {
  border-bottom: none; /* Remove bottom border from last row */
}

.leaderboard-highlight {
  background-color: #ffe066; /* Light gold */
  font-weight: bold;
}

/* .page-title {
  text-align: center;
  font-size: 2rem;
  margin-top: 50px;
  margin-bottom: 20px;
  color: #2c3e50;
  font-weight: bold;
} */

.leaderboard-description {
  max-width: 1200px;
  width: 90%;
  margin: 30px auto;
  padding: 25px 40px;
  background-color: #f8f9fa;
  border-radius: 8px;
  line-height: 1.6;
}

.leaderboard-description h2 {
  color: #2c3e50;
  margin-bottom: 15px;
  font-size: 1.5rem;
  text-align: center;
}

.leaderboard-description p {
  margin-bottom: 12px;
  color: #555;
  font-size: 1rem;
}

.leaderboard-description p strong {
  color: #007bff;
}

.leaderboard-description ul {
  margin-left: 20px;
  margin-bottom: 15px;
}

.leaderboard-description ul li {
  margin-bottom: 8px;
  color: #555;
}

.leaderboard-description .note {
  background-color: #e7f3ff;
  padding: 12px;
  border-left: 4px solid #007bff;
  margin-top: 15px;
  border-radius: 4px;
}

.new-legend {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: -10px auto 10px; /* tuck it under the year buttons */
  color: #444;
  font-size: 0.95rem;
  width: fit-content;
}

.new-legend .legend-pill {
  background: linear-gradient(to right, #c084fc, #7c3aed);
  color: #fff;
  font-weight: 700;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.7rem;
  letter-spacing: 0.5px;
}