/* Base styles */
:root {
  /* Light theme variables */
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --text-color: #1f2937;
  --bg-color: #ffffff;
  --light-bg: #f9fafb;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
  --transition: all 0.3s ease;
}

/* Dark theme variables */
[data-theme="dark"] {
  --primary-color: #60a5fa;
  --secondary-color: #3b82f6;
  --text-color: #f3f4f6;
  --bg-color: #111827;
  --light-bg: #1f2937;
  --card-bg: #1e293b;
  --border-color: #374151;
}

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

body {
  font-family: 'Inter', 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  overflow-x: hidden;
  transition: background-color 0.3s ease;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Navigation */
nav {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

[data-theme="dark"] nav {
  background-color: rgba(17, 24, 39, 0.8);
}

nav a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

/* Header */
header {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background-color: #F7CDFF;
  background-image: linear-gradient(120deg, #F7CDFF 0%, #ffffff 100%);
}

[data-theme="dark"] header {
  background-image: 
    linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(30, 64, 175, 0.05) 100%);
}

/* Animated background */
.animated-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.animated-bg span {
  position: absolute;
  display: block;
  width: 20px;
  height: 20px;
  background: rgba(199, 106, 206, 0.1);
  animation: animate 25s linear infinite;
  bottom: -150px;
  border-radius: 50%;
}

@keyframes animate {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
    border-radius: 0;
  }
  100% {
    transform: translateY(-1000px) rotate(720deg);
    opacity: 0;
    border-radius: 50%;
  }
}

/* Profile Picture */
.profile-picture img {
  border-radius: 1rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  filter: brightness(1);
}

[data-theme="dark"] .profile-picture img {
  filter: brightness(0.9);
}

.profile-picture img:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.15), 0 15px 15px -5px rgba(0, 0, 0, 0.08);
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 25px -5px rgba(199, 106, 206, 0.1), 0 10px 10px -5px rgba(199, 106, 206, 0.06);
}

/* Publication Cards */
.publication-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.publication-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 25px -5px rgba(199, 106, 206, 0.1), 0 10px 10px -5px rgba(199, 106, 206, 0.06);
}

/* Publication year tags */
.publication-year-tag {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  background-color: var(--light-bg);
  color: var(--text-color);
  margin: 0.25rem;
  transition: var(--transition);
}

.publication-link {
  color: #C76ACE;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.publication-link:hover {
  color: #b44ebb;
}

.publication-link i {
  transition: transform 0.2s ease;
}

.publication-link:hover i {
  transform: translateX(4px);
}

/* Social Links */
.social-links-group {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
  width: 100%;
}

.social-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  width: 100%;
}

.social-group-title {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-color);
  opacity: 0.7;
  margin-bottom: 0.5rem;
  text-align: center;
}

.social-links-group .social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 9999px;
  transition: var(--transition);
  background-color: var(--light-bg);
  color: var(--text-color);
  position: relative;
  font-size: 1.25rem;
}

.social-links-group .social-link:hover {
  background-color: #C76ACE !important;
  color: white !important;
  transform: translateY(-2px);
}

/* Specific style for Bluesky icon */
.bluesky-icon {
  width: 20px;
  height: 20px;
}

.social-link[data-brand="bluesky"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.social-link[data-brand="bluesky"]:hover .bluesky-icon {
  color: white;
}

.social-link::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: 0.5rem 1rem;
  background-color: var(--text-color);
  color: var(--bg-color);
  font-size: 0.875rem;
  border-radius: 0.375rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  pointer-events: none;
}

.social-link::after {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid var(--text-color);
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  pointer-events: none;
}

.social-link:hover::before,
.social-link:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Brand Colors - All using the same hover color now */
.social-link[data-brand="email"]:hover,
.social-link[data-brand="github"]:hover,
.social-link[data-brand="linkedin"]:hover,
.social-link[data-brand="scholar"]:hover,
.social-link[data-brand="twitter"]:hover,
.social-link[data-brand="bluesky"]:hover {
  background-color: #E9A2EF;
  color: white;
  transform: translateY(-2px);
}

.social-link[data-brand="instagram"]:hover {
  background: #E9A2EF;
  color: white;
  transform: translateY(-2px);
}

/* Dark mode adjustments for tooltips */
[data-theme="dark"] .social-link::before {
  background-color: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .social-link::after {
  border-top-color: var(--card-bg);
}

/* Theme Toggle Button */
.theme-toggle {
  position: fixed;
  bottom: 8rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  border-radius: 9999px;
  background-color: #C76ACE;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Skill Tags */
.skill-tag {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  background-color: var(--light-bg);
  color: var(--text-color);
  margin: 0.25rem;
  transition: var(--transition);
}

.skill-tag:hover {
  background-color: #C76ACE;
  color: white;
  transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
  header {
    padding: 6rem 0;
    min-height: auto;
  }

  .card {
    padding: 1.5rem;
  }

  .social-links {
    flex-wrap: wrap;
    gap: 1rem;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

.slide-in {
  animation: slideIn 0.6s ease-out forwards;
}

/* Print Styles */
@media print {
  nav, .theme-toggle, .social-links {
    display: none;
  }

  body {
    color: black;
    background-color: white;
  }

  a {
    text-decoration: none;
    color: black;
  }

  .container {
    width: 100%;
    max-width: none;
  }
}

/* Research Area Icons */
.text-research {
  color: #C76ACE;
}

.card:hover .text-research {
  color: #C76ACE;
  transform: scale(1.1);
  transition: all 0.3s ease;
}

/* Button styles */
.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--secondary-color);
}

.btn-outline {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-outline:hover {
  background-color: var(--light-bg);
}

/* Education Timeline */
.education-year {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background-color: var(--light-bg);
  color: #48264A;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background-color: #48264A;
}

/* Navigation hover effect */
.nav-link {
  position: relative;
  padding-bottom: 0.25rem;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: #48264A;
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* Back to top button */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  border-radius: 9999px;
  background-color: #C76ACE;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

#back-to-top:hover {
  background-color: #b44ebb;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}