/* Glassmorphism Theme Variables */
:root {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-tertiary: #111111;
  --accent-color: #ffffff;
  --accent-secondary: #cccccc;
  --text-primary: #ffffff;
  --text-secondary: #e0e0e0; /* Increased brightness */

  /* Glass Effect Variables */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: 1px solid rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  --glass-blur: blur(20px);

  /* Spacing & Layout */
  --section-padding: 80px 10%;
  --border-radius: 16px;
  --transition-speed: 0.3s ease;
}

/* Global Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  color: #ffffff;
  background-color: var(--bg-primary);
  overflow-x: hidden;
  line-height: 1.7;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
  padding-top: 80px; /* Space for fixed navbar */
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 15px 0;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.nav-logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-color);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 30px;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-speed);
  position: relative;
}

.nav-link:hover {
  color: var(--accent-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: var(--transition-speed);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: var(--transition-speed);
}

/* Responsive Navigation */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.95);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    padding: 20px 0;
    gap: 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* Background Animation */
.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: -2;
  background: url('theme3.png'), var(--bg-primary);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
  animation: bgMove 20s ease-in-out infinite alternate;
}

@keyframes bgMove {
  0% {
    background-position: center center;
  }
  100% {
    background-position: center 20%;
  }
}

.background-animation::before,
.background-animation::after {
  content: '';
  position: absolute;
  filter: blur(60px); /* Reduced blur to make it more subtle */
  opacity: 0.3; /* Reduced opacity to not overpower the theme image */
  border-radius: 50%;
  animation: bgFloat 25s infinite alternate;
  width: 40vw;
  height: 40vw;
  z-index: -1; /* Ensure it's behind the theme image */
}

.background-animation::before {
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 70%);
  top: -5%;
  left: -5%;
  animation-duration: 30s;
}

.background-animation::after {
  background: radial-gradient(circle, rgba(100, 100, 100, 0.12), transparent 70%);
  bottom: -5%;
  right: -5%;
  animation-duration: 35s;
  animation-direction: alternate-reverse;
}

@keyframes bgFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }

  50% {
    transform: translate(30px, 50px) scale(1.1);
  }

  100% {
    transform: translate(-20px, -30px) scale(0.9);
  }
}

/* Scrolled styling for sticky header could be added via JS, but basic header styling first */
header {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  padding: 0 20px;
  animation: fadeInDown 1.5s ease;
}

header::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.02) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

header h1 {
  font-size: 4rem;
  margin: 0;
  font-weight: 700;
  background: linear-gradient(to right, #ffffff, #888888);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -1px;
  text-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
}

header p {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin: 1rem 0 2.5rem;
  font-weight: 300;
}

/* Navigation Links */
header .links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

header .links a,
.btn {
  display: inline-block;
  padding: 12px 30px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: 50px;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-speed);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 1px;
}

header .links a:hover,
.btn:hover {
  background: var(--accent-color);
  color: #000;
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.2);
  border-color: transparent;
}

/* Sections */
section {
  padding: var(--section-padding);
  position: relative;
  z-index: 1;
}

section h2 {
  font-size: 2.5rem;
  margin-bottom: 50px;
  text-align: center;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent-color);
  margin: 10px auto 0;
  border-radius: 2px;
  box-shadow: 0 0 10px var(--accent-color);
}

/* Glass Cards */
.skills div,
.project,
.about-container,
.contact p {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-speed);
}

.skills div:hover,
.project:hover {
  transform: translateY(-10px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
}

/* About Section */
.about-container {
  display: flex;
  align-items: center;
  gap: 50px;
  max-width: 1000px;
  margin: 0 auto 50px;
}

.profile-img {
  width: 250px;
  height: 250px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  animation: floatImg 4s ease-in-out infinite;
}

@keyframes floatImg {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-15px);
  }
}

.about-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.contact {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.contact p {
  margin: 0;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Skills Grid */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.skills h3 {
  color: var(--accent-color);
  font-size: 1.5rem;
  margin-top: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 15px;
  margin-bottom: 20px;
}

.skills ul li {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
}

/* Projects */
.project {
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}

.project::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-color);
  opacity: 0.7;
}

.project h3 {
  color: var(--accent-color);
  font-size: 1.8rem;
  margin-top: 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.project .date {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 400;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 12px;
  border-radius: 20px;
}

.project p {
  color: var(--text-secondary);
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.7);
}

.project a {
  color: var(--accent-secondary);
  text-decoration: none;
  font-weight: 600;
}

.project a:hover {
  text-decoration: underline;
}

/* Featured Project */
.featured-project {
  border: 2px solid var(--accent-color);
  border-radius: var(--border-radius);
  position: relative;
}

.featured-project::before {
  background: linear-gradient(to bottom, var(--accent-color), #ff6600);
}

.project-text {
  padding: 20px;
}

.project-text p {
  line-height: 1.8;
  margin-bottom: 20px;
}

.project-video {
  margin-top: 20px;
  border-radius: 20px; /* Curved edges */
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  background: var(--glass-bg);
  border: var(--glass-border);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  aspect-ratio: 16/9; /* Landscape format */
  width: 100%;
  max-width: 800px;
  margin: 20px auto;
}

/* Specific styling for projects without videos */
.project .project-text:last-child {
  margin-bottom: 20px;
}

.project-video:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6);
}

.project-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.featured-project:hover .project-media {
  transform: scale(1.05);
}

/* Animation for project appearance */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.project {
  animation: fadeInUp 0.8s ease-out forwards;
  opacity: 0;
}

.project:nth-child(1) { animation-delay: 0.1s; }
.project:nth-child(2) { animation-delay: 0.3s; }
.project:nth-child(3) { animation-delay: 0.5s; }

/* Certificates Carousel */
.certificates-carousel {
  overflow: hidden;
  padding: 20px 0;
  position: relative;
}

.carousel-track {
  display: flex;
  width: calc(250px * 10); /* 5 original + 5 duplicates * 250px each */
  animation: scroll 30s linear infinite;
}

.carousel-track:hover {
  animation-play-state: paused;
}

.certificate-slide {
  flex: 0 0 250px;
  margin-right: 20px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--border-radius);
  padding: 15px;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-speed);
  overflow: hidden;
}

.certificate-slide:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.8);
}

.certificate-img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%); /* Move left by half the total width to create seamless loop */
  }
}

/* Certifications & Achievements handled generically by list utils or specific if needed */
.list {
  list-style: none;
  padding: 0;
  max-width: 800px;
  margin: 0 auto;
}

.list li {
  background: var(--glass-bg);
  margin-bottom: 15px;
  padding: 20px;
  border-radius: 10px;
  border: var(--glass-border);
  display: flex;
  align-items: center;
  transition: var(--transition-speed);
}

.list li:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(10px);
}

.list li::before {
  content: '✦';
  margin-right: 15px;
  font-size: 1.2rem;
  color: var(--accent-color);
}

/* Contact Section */
.contact-container {
  display: flex;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.contact-form {
  flex: 1;
  min-width: 300px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--glass-shadow);
}

.form-group {
  position: relative;
  margin-bottom: 25px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 15px;
  padding-top: 25px; /* Extra padding to prevent overlap with placeholder */
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition-speed);
  z-index: 1;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: transparent;
}

.form-group input:focus::placeholder,
.form-group textarea:focus::placeholder {
  color: var(--text-secondary);
  transition: var(--transition-speed);
}

.form-group label {
  position: absolute;
  top: 15px;
  left: 15px;
  color: var(--text-secondary);
  pointer-events: none;
  transition: var(--transition-speed);
  z-index: 2;
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.7);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -20px;
  left: 10px;
  font-size: 0.8rem;
  color: var(--accent-color);
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 4px;
  z-index: 3;
}

.submit-btn {
  width: 100%;
  padding: 15px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition-speed);
}

.contact-info {
  flex: 1;
  min-width: 300px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--glass-shadow);
}

.contact-info h3 {
  color: var(--accent-color);
  margin-top: 0;
  margin-bottom: 25px;
  font-size: 1.8rem;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

.contact-info p {
  margin: 15px 0;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 10px;
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.7);
}

.contact-info a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-speed);
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.7);
}

.contact-info a:hover {
  color: var(--accent-color);
}

.social-links {
  display: flex;
  gap: 15px;
  margin-top: 25px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: var(--glass-border);
  color: var(--text-primary);
  font-size: 1.2rem;
  transition: var(--transition-speed);
}

.social-link:hover {
  background: var(--accent-color);
  color: var(--bg-primary);
  transform: translateY(-5px);
}

/* Footer */
footer {
  text-align: center;
  padding: 40px;
  background: rgba(0, 0, 0, 0.3);
  margin-top: 50px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* Success Message Animation */
.success-message {
  position: fixed;
  top: 20px;
  right: 20px;
  background: rgba(46, 204, 113, 0.9);
  color: white;
  padding: 15px 25px;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  transform: translateX(150%);
  transition: transform 0.4s ease-out;
}

.success-message.show {
  transform: translateX(0);
}

.success-message.hide {
  transform: translateX(150%);
}

/* Animations Keyframes */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll Animation Utilities */
.hidden-element {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.visible-element {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays for children */
.stagger-1 {
  transition-delay: 0.1s;
}

.stagger-2 {
  transition-delay: 0.2s;
}

.stagger-3 {
  transition-delay: 0.3s;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 2.5rem;
  }

  .about-container {
    flex-direction: column;
    text-align: center;
  }

  .profile-img {
    width: 180px;
    height: 180px;
  }

  section {
    padding: 60px 5%;
  }
}

/* Timeline/Academic Journey Styles */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 40px auto;
  padding-left: 20px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent-color);
  border-radius: 2px;
  opacity: 0.3;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 30px;
}

.timeline-marker {
  position: absolute;
  left: -33px;
  top: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-color);
  border: 3px solid var(--bg-primary);
  z-index: 1;
  transition: all 0.3s ease;
}

.timeline-item:hover .timeline-marker {
  transform: scale(1.5);
  background: var(--text-primary);
}

.timeline-content {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--border-radius);
  padding: 25px;
  box-shadow: var(--glass-shadow);
  transition: all 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
}

.timeline-content h3 {
  color: var(--accent-color);
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.4rem;
}

.timeline-content .date {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.timeline-content p {
  margin: 8px 0;
  color: var(--text-secondary);
}

/* Animation for timeline items */
.timeline-item {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease-out forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.2s; }
.timeline-item:nth-child(2) { animation-delay: 0.4s; }
.timeline-item:nth-child(3) { animation-delay: 0.6s; }

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

/* Download CV Button */
.download-cv-section {
  margin-top: 20px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 25px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: 50px;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-speed);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 1px;
}

.download-btn:hover {
  background: var(--accent-color);
  color: #000;
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(255, 255, 255, 0.2);
  border-color: transparent;
}