/* Custom Animations for Portfolio Website */

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

/* Page fade-in animation - keep it subtle to avoid flash */
/* Removed body fade-in to prevent dark flash on load */

/* Ensure header/sidebar remains fixed and stable */
#header {
  position: fixed !important;
  transition: none !important;
}

/* Allow profile image to be interactive */

/* Disable animations that might affect layout */
body, html {
  animation: none !important;
}

main {
  animation: none !important;
}

/* CV Button Pulse Animation */
.cv-pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(20, 157, 221, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(20, 157, 221, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(20, 157, 221, 0);
  }
}

/* Hover effect for publication cards */
.post {
  transition: all 0.3s ease;
  padding: 15px;
  border-radius: 8px;
}

.post:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  background: #f8f9fa;
}

/* Hover effects for buttons */
.btn-primary {
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(20, 157, 221, 0.4);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
  width: 300px;
  height: 300px;
}

/* Social links hover animation */
.social-links a {
  transition: all 0.3s ease;
}

.social-links a:hover {
  transform: translateY(-5px) scale(1.1);
}

/* Navigation hover effect */
.nav-link {
  position: relative;
  transition: all 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #149ddd;
  transition: width 0.3s ease;
}

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

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

/* Resume item hover effect */
.resume-item {
  transition: all 0.3s ease;
  border-left: 3px solid #149ddd;
  padding: 20px 25px 20px 25px;
  position: relative;
}

.resume-item:hover {
  transform: translateX(5px);
  border-left-width: 5px;
}

/* Info box hover effect */
.info-box {
  transition: all 0.3s ease;
}

.info-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15) !important;
}

/* Link hover animation */
a {
  transition: all 0.3s ease;
}

/* Skill item animation */
.research-interest-item {
  transition: all 0.3s ease;
}

.research-interest-item:hover {
  transform: translateX(5px);
  color: #149ddd;
}

/* Image hover effect */
.profile img {
  transition: all 0.3s ease;
}

.profile img:hover {
  transform: scale(1.05);
}

/* Section title underline animation */
.section-title h2 {
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 50px;
  height: 3px;
  background: #149ddd;
  animation: slideIn 0.8s ease;
}

@keyframes slideIn {
  from {
    width: 0;
  }
  to {
    width: 50px;
  }
}

/* Floating animation for hero section */
@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}

.hero-container h1 {
  animation: float 3s ease-in-out infinite;
}

/* Subtle overlay animation for hero - removed dark gradient */
/* Keeping the original hero background from style.css */

/* Staggered fade-in for list items */
.about ul li,
.resume-item ul li {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.about ul li:nth-child(1),
.resume-item ul li:nth-child(1) { animation-delay: 0.1s; }
.about ul li:nth-child(2),
.resume-item ul li:nth-child(2) { animation-delay: 0.2s; }
.about ul li:nth-child(3),
.resume-item ul li:nth-child(3) { animation-delay: 0.3s; }
.about ul li:nth-child(4),
.resume-item ul li:nth-child(4) { animation-delay: 0.4s; }
.about ul li:nth-child(5),
.resume-item ul li:nth-child(5) { animation-delay: 0.5s; }
.about ul li:nth-child(6),
.resume-item ul li:nth-child(6) { animation-delay: 0.6s; }

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

/* Back to top button animation */
.back-to-top {
  transition: all 0.3s ease;
}

.back-to-top:hover {
  transform: translateY(-5px);
  background: #149ddd;
}

/* Mobile nav toggle animation */
.mobile-nav-toggle {
  transition: all 0.3s ease;
}

.mobile-nav-toggle:hover {
  transform: rotate(90deg);
}

/* Loading animation for images */
img {
  animation: imageLoad 0.5s ease;
}

@keyframes imageLoad {
  from {
    opacity: 0;
    filter: blur(5px);
  }
  to {
    opacity: 1;
    filter: blur(0);
  }
}

/* News item hover effect */
.news ul p {
  transition: all 0.3s ease;
  padding: 10px;
  border-radius: 5px;
}

.news ul p:hover {
  background: rgba(20, 157, 221, 0.05);
  transform: translateX(5px);
}

/* Contact info hover effect */
.info .email,
.info .phone,
.info .address {
  transition: all 0.3s ease;
}

.info .email:hover,
.info .phone:hover,
.info .address:hover {
  transform: scale(1.05);
}

/* Icon spin animation on hover */
.bi:hover {
  animation: iconSpin 0.5s ease;
}

@keyframes iconSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Typewriter cursor blink */
.typed-cursor {
  animation: blink 0.7s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/*--------------------------------------------------------------
# Profile Image Size Adjustment
--------------------------------------------------------------*/
#header .profile img {
  width: 180px !important;
  height: 180px !important;
  border: 8px solid #2c2f3f;
  margin: 15px auto;
  display: block;
  object-fit: cover;
}

/*--------------------------------------------------------------
# Reading Progress Indicator
--------------------------------------------------------------*/
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #149ddd, #37b3ed);
  z-index: 9999;
  transition: width 0.1s ease;
  box-shadow: 0 2px 5px rgba(20, 157, 221, 0.5);
}

/*--------------------------------------------------------------
# Enhanced Back to Top Button
--------------------------------------------------------------*/
.back-to-top {
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateY(20px);
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 8px 20px rgba(20, 157, 221, 0.4);
}

.back-to-top i {
  transition: transform 0.3s ease;
}

.back-to-top:hover i {
  transform: translateY(-2px);
}

/*--------------------------------------------------------------
# Dark Mode Styles
--------------------------------------------------------------*/
[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-tertiary: #2f2f2f;
  --text-primary: #f0f0f0;
  --text-secondary: #c0c0c0;
  --border-color: #404040;
  --card-bg: #252525;
  --shadow: rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

[data-theme="dark"] #main {
  background-color: var(--bg-primary);
}

[data-theme="dark"] section {
  background-color: var(--bg-primary);
}

[data-theme="dark"] .section-bg {
  background-color: var(--bg-secondary) !important;
}

[data-theme="dark"] .resume-item,
[data-theme="dark"] .post,
[data-theme="dark"] .info-box {
  background-color: var(--card-bg);
  border-color: var(--border-color);
  box-shadow: 0 3px 15px var(--shadow);
}

[data-theme="dark"] .resume-item h4,
[data-theme="dark"] .post h4,
[data-theme="dark"] h2,
[data-theme="dark"] h3 {
  color: var(--text-primary);
}

[data-theme="dark"] p,
[data-theme="dark"] .resume-item p,
[data-theme="dark"] .post p {
  color: var(--text-secondary);
}

[data-theme="dark"] .section-title h2 {
  color: var(--text-primary);
}

[data-theme="dark"] .section-title h2::after {
  background: #149ddd;
}

[data-theme="dark"] a {
  color: #149ddd;
}

[data-theme="dark"] a:hover {
  color: #37b3ed;
}

[data-theme="dark"] #hero {
  background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url("../img/me.jpg") top center;
  background-size: cover;
}

[data-theme="dark"] #hero:before {
  background: rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .container,
[data-theme="dark"] .container-fluid {
  background-color: transparent;
}

[data-theme="dark"] .news ul p {
  color: var(--text-secondary);
}

[data-theme="dark"] .news ul p strong {
  color: var(--text-primary);
}

[data-theme="dark"] .btn-primary {
  background-color: #149ddd;
  border-color: #149ddd;
}

[data-theme="dark"] .btn-primary:hover {
  background-color: #37b3ed;
  border-color: #37b3ed;
}

/* Dark Mode Toggle Button */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: #149ddd;
  color: #fff;
  border: none;
  cursor: pointer;
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 15px rgba(20, 157, 221, 0.3);
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  background: #37b3ed;
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(20, 157, 221, 0.5);
}

.theme-toggle:active {
  transform: scale(0.95);
}

@media (max-width: 1199px) {
  .theme-toggle {
    top: 70px;
    right: 15px;
    width: 45px;
    height: 45px;
    font-size: 18px;
  }
}

/*--------------------------------------------------------------
# Enhanced Publication Cards with Hover Effects
--------------------------------------------------------------*/
.post {
  position: relative;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 10px;
  padding: 25px 28px;
  margin-bottom: 20px;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.post::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, #149ddd, #37b3ed);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.post:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  background: #f8f9fa;
}

.post:hover::before {
  transform: scaleY(1);
}

.post h4,
.post li {
  position: relative;
  transition: color 0.3s ease;
}

.post:hover h4,
.post:hover li {
  color: #149ddd;
}

.post .publication-links {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  margin-top: 10px;
}

.post:hover .publication-links {
  opacity: 1;
  max-height: 100px;
  margin-top: 10px;
}

[data-theme="dark"] .post {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .post:hover {
  background: var(--bg-tertiary);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.7);
}

/*--------------------------------------------------------------
# Better Publication Bullet Points
--------------------------------------------------------------*/
.post ul {
  list-style: none !important;
  padding-left: 0 !important;
  margin-bottom: 10px !important;
  margin-top: 0 !important;
}

.post ul li {
  position: relative;
  padding-left: 26px !important;
  font-size: 16px !important;
  line-height: 1.7 !important;
  margin-bottom: 0 !important;
}

.post ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: #149ddd;
  font-size: 18px;
  font-weight: bold;
  line-height: 1.6;
  transition: all 0.3s ease;
}

.post:hover ul li::before {
  color: #37b3ed;
  transform: translateX(3px);
}

[data-theme="dark"] .post ul li::before {
  color: #149ddd;
}

[data-theme="dark"] .post:hover ul li::before {
  color: #37b3ed;
}

/*--------------------------------------------------------------
# Better Publication Alignment and Spacing
--------------------------------------------------------------*/
.post p {
  margin-bottom: 10px !important;
  margin-top: 0 !important;
  line-height: 1.6 !important;
}

.post > div {
  margin-top: 8px !important;
  margin-bottom: 0 !important;
}

.post > div p {
  margin-bottom: 8px !important;
  margin-top: 0 !important;
  line-height: 1.6 !important;
}

.post > div span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-right: 12px;
  vertical-align: middle;
}

/* Center the separator line between Paper and GitHub */
.post > div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}

.post > div p {
  width: 100%;
  margin-bottom: 8px !important;
  margin-top: 0 !important;
  line-height: 1.6 !important;
}

.post > div > span:has(a) {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.post > div > span:has(a):first-of-type {
  margin-right: 0;
}

.post > div > span:has(a):last-of-type {
  margin-left: 0;
}

/* Style the separator - centered between links with equal spacing */
.post > div .link-separator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #999;
  margin-left: 12px;
  margin-right: 12px;
  padding: 0;
  vertical-align: middle;
  line-height: 1;
  font-size: 14px;
  flex-shrink: 0;
  height: 100%;
}

[data-theme="dark"] .post > div .link-separator {
  color: #888;
}

.post > div span:last-child {
  margin-right: 0;
}

.post a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-right: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  vertical-align: middle;
}

.post a:last-child {
  margin-right: 0;
}

.post a i {
  vertical-align: middle;
}

/* Consistent spacing between publication cards */
.post + br + .post {
  margin-top: 0;
}

/* Better alignment for metadata section */
.post > div p:first-child {
  margin-bottom: 8px !important;
}

/*--------------------------------------------------------------
# Enhanced Dark Mode Styling for Publications & All Pages
--------------------------------------------------------------*/

/* Publication page specific improvements */
[data-theme="dark"] .post ul li b {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .post p {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .post p b {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .post p[style*="opacity"] {
  opacity: 0.9 !important;
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .post span[style*="color"] {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .post span b {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .post i.fas,
[data-theme="dark"] .post i.far,
[data-theme="dark"] .post i.fab {
  color: #149ddd !important;
}

[data-theme="dark"] .post .publication-links p {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .post .publication-links i {
  color: #149ddd !important;
}

/* Better contrast for links in publications */
[data-theme="dark"] .post a {
  color: #4db8ff !important;
  transition: color 0.3s ease;
}

[data-theme="dark"] .post a:hover {
  color: #37b3ed !important;
  text-decoration: underline;
}

/* Section title improvements */
[data-theme="dark"] .section-title p {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .section-title a {
  color: #4db8ff !important;
}

[data-theme="dark"] .section-title a:hover {
  color: #37b3ed !important;
}

/* Button improvements */
.btn-primary {
  background-color: #149ddd !important;
  border-color: #149ddd !important;
  color: #fff !important;
}

.btn-primary:hover {
  background-color: #37b3ed !important;
  border-color: #37b3ed !important;
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(20, 157, 221, 0.4);
}

[data-theme="dark"] .btn-primary {
  background-color: #149ddd !important;
  border-color: #149ddd !important;
  color: #fff !important;
}

[data-theme="dark"] .btn-primary:hover {
  background-color: #37b3ed !important;
  border-color: #37b3ed !important;
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(20, 157, 221, 0.4);
}

/* Google Scholar button specific styling */
.google-scholar-btn {
  background-color: #149ddd !important;
  border-color: #149ddd !important;
  color: #fff !important;
}

.google-scholar-btn:hover {
  background-color: #37b3ed !important;
  border-color: #37b3ed !important;
  color: #fff !important;
}

[data-theme="dark"] .google-scholar-btn {
  background-color: #149ddd !important;
  border-color: #149ddd !important;
  color: #fff !important;
}

[data-theme="dark"] .google-scholar-btn:hover {
  background-color: #37b3ed !important;
  border-color: #37b3ed !important;
  color: #fff !important;
}

/* Experience page improvements */
[data-theme="dark"] .resume-item {
  background-color: var(--card-bg) !important;
  border-left: 3px solid #149ddd !important;
  padding: 20px 25px 20px 25px !important;
}

[data-theme="dark"] .resume-item:hover {
  border-left-width: 5px !important;
  background-color: var(--bg-tertiary) !important;
}

[data-theme="dark"] .resume-item h4 {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .resume-item h5 {
  color: #4db8ff !important;
}

[data-theme="dark"] .resume-item p {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .resume-item p em {
  color: #4db8ff !important;
}

[data-theme="dark"] .resume-item ul li {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .resume-item ul li strong {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .resume-item a {
  color: #4db8ff !important;
}

[data-theme="dark"] .resume-item a:hover {
  color: #37b3ed !important;
}

/* About page improvements */
[data-theme="dark"] .about p {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .about p strong {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .about ul li {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .about ul li i {
  color: #149ddd !important;
}

[data-theme="dark"] .about a {
  color: #4db8ff !important;
}

[data-theme="dark"] .about a:hover {
  color: #37b3ed !important;
}

/* News page improvements */
[data-theme="dark"] .news {
  background-color: var(--bg-secondary) !important;
}

[data-theme="dark"] .news ul p {
  color: var(--text-secondary) !important;
  background-color: transparent !important;
}

[data-theme="dark"] .news ul p strong {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .news ul p i {
  color: #149ddd !important;
}

[data-theme="dark"] .news ul p a {
  color: #4db8ff !important;
}

[data-theme="dark"] .news ul p a:hover {
  color: #37b3ed !important;
}

/* Contact page improvements */
[data-theme="dark"] .info-box {
  background-color: var(--card-bg) !important;
  border: 1px solid var(--border-color) !important;
}

[data-theme="dark"] .info-box h4 {
  color: var(--text-primary) !important;
}

[data-theme="dark"] .info-box p {
  color: var(--text-secondary) !important;
}

[data-theme="dark"] .info-box a {
  color: #4db8ff !important;
}

/* General improvements for better readability */
[data-theme="dark"] br {
  opacity: 1;
}

[data-theme="dark"] .text-center {
  color: inherit;
}

/* Improve card shadows in dark mode */
[data-theme="dark"] .post,
[data-theme="dark"] .resume-item,
[data-theme="dark"] .info-box {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6) !important;
}

[data-theme="dark"] .post:hover,
[data-theme="dark"] .resume-item:hover,
[data-theme="dark"] .info-box:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8) !important;
}

/*--------------------------------------------------------------
# Skill Graph
--------------------------------------------------------------*/
#skill-graph {
  width: 100%;
  height: 750px;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background-color: #f9f9f9;
  transition: all 0.3s ease;
}

[data-theme="dark"] #skill-graph {
  border-color: var(--border-color);
  background-color: var(--card-bg);
}
.publication-year {
  margin-top: 50px;
  margin-bottom: 30px;
  position: relative;
  padding: 20px 0;
}

.publication-year:first-child {
  margin-top: 30px;
}

.publication-year h3 {
  font-size: 32px;
  font-weight: 700;
  color: #173b6c;
  margin: 0;
  padding: 15px 30px;
  display: inline-block;
  position: relative;
  background: linear-gradient(135deg, rgba(20, 157, 221, 0.12), rgba(55, 179, 237, 0.08));
  border-radius: 10px;
  border-left: 4px solid #149ddd;
  box-shadow: 0 3px 10px rgba(20, 157, 221, 0.2);
  transition: all 0.3s ease;
}

.publication-year h3:hover {
  transform: translateX(5px);
  box-shadow: 0 5px 15px rgba(20, 157, 221, 0.3);
  background: linear-gradient(135deg, rgba(20, 157, 221, 0.18), rgba(55, 179, 237, 0.12));
  border-left-width: 5px;
}

[data-theme="dark"] .publication-year h3 {
  color: var(--text-primary);
  background: linear-gradient(135deg, rgba(20, 157, 221, 0.25), rgba(55, 179, 237, 0.15));
  border-left-color: #149ddd;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .publication-year h3:hover {
  background: linear-gradient(135deg, rgba(20, 157, 221, 0.3), rgba(55, 179, 237, 0.2));
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.6);
}