/* ==================== ROOT VARIABLES ==================== */
/* 
  CUSTOMIZE YOUR PORTFOLIO HERE:
  - Change colors by editing these variables
  - Dark theme colors are in :root
  - Light theme colors are in .light-theme
  - Gradient goes from accent-color to accent-secondary
  - All animations use the --transition timing
*/

:root {
  /* Dark Theme - Black Focused with Teal Accents */
  --bg-color: #0a0a0a;                     /* Deep black background - perfect for Three.js */
  --bg-gradient: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%); /* Black gradient */
  --text-color: #ffffff;                   /* Main text color */
  --text-secondary: #b0b0b0;               /* Light gray text */
  --accent-color: #0092A2;                 /* Primary accent (vibrant teal) */
  --accent-secondary: #017481;             /* Secondary accent (medium teal) */
  --accent-gradient: linear-gradient(135deg, #0092A2 0%, #017481 100%); /* Teal gradient */
  --accent-hover: #017481;                 /* Hover state color */
  --card-bg: rgba(20, 20, 20, 0.8);        /* Card background (dark black glass effect) */
  --card-border: rgba(129, 183, 182, 0.2); /* Card border color */
  --box-shadow: rgba(0, 146, 162, 0.3);    /* Shadow color for cards */
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); /* Animation timing */
  --navbar-height: 70px;                   /* Height of navigation bar */
  --border-radius: 20px;                   /* Standard border radius */
}

/* Light Theme Colors - Blue to White Palette */
.light-theme {
  --bg-color: #ffffff;                     /* Pure white background */
  --bg-gradient: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%); /* White to light blue gradient */
  --text-color: #1e3a8a;                   /* Deep royal blue text */
  --text-secondary: #3b82f6;               /* Vibrant medium blue text */
  --accent-color: #1e3a8a;                 /* Primary accent (deep royal blue) */
  --accent-secondary: #3b82f6;             /* Secondary accent (vibrant blue) */
  --accent-gradient: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%); /* Blue gradient */
  --accent-hover: #1e40af;
  --card-bg: rgba(59, 130, 246, 0.05);     /* Very light blue glass effect */
  --card-border: rgba(59, 130, 246, 0.15); /* Light blue border */
  --box-shadow: rgba(59, 130, 246, 0.15);  /* Blue shadow */
}

/* ==================== BASE STYLES ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--accent-gradient);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 10000;
  font-weight: 600;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 6px;
}

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-gradient);
  color: var(--text-color);
  line-height: 1.7;
  transition: background 0.6s ease, color 0.6s ease;
  overflow-x: hidden;
  position: relative;
}

/* 3D Background Canvas */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.6;
  transition: opacity 0.5s ease;
  cursor: crosshair;
  pointer-events: all;
}

/* Enhanced sections with 3D integration */
.section {
  position: relative;
  z-index: 10;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

/* Hero section with enhanced 3D feel */
.hero {
  position: relative;
  z-index: 10;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

/* Cards with enhanced depth */
.card, .experience-card, .achievement-item {
  position: relative;
  z-index: 3;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Fun interactive effects */
.card:hover, .experience-card:hover, .achievement-item:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  filter: brightness(1.1);
}

/* Floating animation for hero elements */
.hero h1 {
  animation: float 3s ease-in-out infinite;
}

.hero .profile-img {
  animation: float 3s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* Keep name straight but bouncing */
.hero h1 {
  animation: bounceVertical 2s ease-in-out infinite;
}

@keyframes bounceVertical {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
}

/* Fun button effects */
.btn, .resume-btn {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btn::before, .resume-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

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

/* Fun skill badge animations */
.skill-badge {
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.skill-badge::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.skill-badge:hover::before {
  left: 100%;
}

/* Fun scroll indicator */
.scroll-to-top {
  transition: all 0.3s ease;
}

.scroll-to-top:hover {
  transform: scale(1.2) rotate(360deg);
  box-shadow: 0 10px 30px var(--box-shadow);
}

/* Enhanced section interactions */
.section {
  position: relative;
  overflow: hidden;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s;
  z-index: 1;
}

.section:hover::before {
  left: 100%;
}

/* Interactive project cards */
.project-card, .experience-card, .achievement-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.project-card::after, .experience-card::after, .achievement-item::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, rgba(0, 217, 255, 0.3), transparent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
  z-index: -1;
}

.project-card:hover::after, .experience-card:hover::after, .achievement-item:hover::after {
  width: 300px;
  height: 300px;
}

/* Enhanced skill badges */
.skill-badge {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-badge::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.skill-badge:hover::after {
  transform: translateX(100%);
}

.skill-badge:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px var(--box-shadow);
}

/* Interactive navigation */
.nav-links a {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.nav-links a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent-gradient);
  transition: left 0.3s;
  z-index: -1;
}

.nav-links a:hover::before {
  left: 0;
}

.nav-links a:hover {
  color: white;
  transform: translateY(-2px);
}

/* Enhanced contact form */
.contact-form input, .contact-form textarea {
  position: relative;
  transition: all 0.3s ease;
}

.contact-form input:focus, .contact-form textarea:focus {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--box-shadow);
}

/* Floating animation for all cards */
@keyframes floatCard {
  0%, 100% { transform: translateY(0px) rotateX(0deg); }
  50% { transform: translateY(-5px) rotateX(2deg); }
}

.project-card, .experience-card, .achievement-item {
  animation: floatCard 4s ease-in-out infinite;
  animation-delay: calc(var(--animation-delay, 0) * 0.2s);
}

/* Staggered animations */
.project-card:nth-child(1) { --animation-delay: 0; }
.project-card:nth-child(2) { --animation-delay: 1; }
.project-card:nth-child(3) { --animation-delay: 2; }
.project-card:nth-child(4) { --animation-delay: 3; }
.project-card:nth-child(5) { --animation-delay: 4; }
.project-card:nth-child(6) { --animation-delay: 5; }

/* Interactive hover states */
.card:hover, .experience-card:hover, .achievement-item:hover {
  animation-play-state: paused;
  transform: translateY(-8px) rotateX(5deg) scale(1.02);
}

/* Enhanced button interactions */
.btn, .resume-btn {
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn::before, .resume-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.btn:hover::before, .resume-btn:hover::before {
  left: 100%;
}

.btn:hover, .resume-btn:hover {
  transform: translateY(-3px) rotateX(10deg);
  box-shadow: 0 15px 35px var(--box-shadow);
}

.btn:active, .resume-btn:active {
  transform: translateY(-1px) rotateX(5deg) scale(0.98);
}

/* Magnetic attraction effect */
.magnetic {
  transition: transform 0.2s ease-out;
}

/* Enhanced theme toggle */
.theme-toggle {
  position: relative;
  overflow: hidden;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
  transform: scale(0);
  transition: transform 0.3s;
}

.theme-toggle:hover::after {
  transform: scale(1);
}

/* Particle trail effect */
.particle-trail {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent-color);
  border-radius: 50%;
  pointer-events: none;
  animation: particleFade 1s ease-out forwards;
}

@keyframes particleFade {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0);
  }
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(123, 47, 247, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

body.light-theme::before {
  background: 
    radial-gradient(circle at 20% 50%, rgba(91, 126, 255, 0.02) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 107, 157, 0.02) 0%, transparent 50%);
}

html {
  scroll-behavior: smooth;
}

/* ==================== STICKY NAVBAR ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 1000;
  padding: 1rem 0;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--card-border);
  transition: var(--transition);
  overflow: hidden;
}

.light-theme .navbar {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.light-theme .nav-links {
  background: rgba(255, 255, 255, 0.98);
}

.light-theme .nav-links a {
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.light-theme .nav-links a:hover {
  background: rgba(30, 58, 138, 0.15);
  border-color: var(--accent-color);
}

.light-theme .resume-btn {
  background: var(--accent-gradient) !important;
  background-image: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%) !important;
  color: white !important;
  box-shadow: 0 4px 15px rgba(30, 58, 138, 0.3) !important;
  border: none !important;
}

.light-theme .resume-btn:hover {
  background-image: linear-gradient(135deg, #1e40af 0%, #2563eb 100%) !important;
  box-shadow: 0 8px 25px rgba(30, 58, 138, 0.4) !important;
}

.nav-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

.logo::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: var(--transition);
}

.logo:hover::after {
  width: 100%;
}

.logo:hover {
  transform: scale(1.05);
  filter: brightness(1.2);
}

.nav-links {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: nowrap;
  min-width: 0;
  flex: 1;
  justify-content: flex-end;
  margin-left: 2rem;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
  padding: 0.5rem 0;
}

.nav-links a:not(.resume-btn)::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  left: 0;
  bottom: 0;
  transition: width 0.3s ease;
}

.nav-links a:not(.resume-btn):hover::after {
  width: 100%;
}

.resume-btn {
  background: var(--accent-gradient);
  color: white !important;
  padding: 0.7rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px var(--box-shadow);
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: 0.5rem;
}

.resume-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.resume-btn:hover::before {
  left: 100%;
}

.resume-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--box-shadow);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
  position: relative;
}

.hamburger span {
  width: 28px;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: 3px;
  transition: var(--transition);
  box-shadow: 0 2px 5px var(--box-shadow);
  pointer-events: none;
}

/* ==================== HERO SECTION ==================== */
.hero {
  text-align: center;
  padding: calc(var(--navbar-height) + 4rem) 2rem 4rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.profile-img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 2rem;
  padding: 5px;
  background: var(--accent-gradient);
  box-shadow: 0 15px 50px var(--box-shadow), 0 0 0 1px var(--card-border);
  transition: var(--transition);
  animation: float 4s ease-in-out infinite, glow 3s ease-in-out infinite;
  position: relative;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 15px 50px var(--box-shadow), 0 0 30px var(--box-shadow); }
  50% { box-shadow: 0 20px 60px var(--box-shadow), 0 0 50px var(--box-shadow); }
}

.profile-img:hover {
  transform: scale(1.08) rotate(-2deg);
  animation-play-state: paused;
}

.hero h1 {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 3rem;
  margin: 1rem 0;
  font-weight: 700;
  position: relative;
}

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  font-weight: 400;
  letter-spacing: 0.5px;
}

.typewrite::after {
  content: '|';
  animation: blink 1s infinite;
  color: var(--accent-color);
}

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

/* ==================== SECTION STYLES ==================== */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

/* Expertise Highlights */
.expertise-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
  padding: 0 1rem;
}

.expertise-category {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.expertise-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.expertise-category::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 146, 162, 0.02) 0%, rgba(129, 183, 182, 0.02) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.expertise-category:hover::before {
  transform: scaleX(1);
}

.expertise-category:hover::after {
  opacity: 1;
}

.expertise-category:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 146, 162, 0.15);
  border-color: rgba(0, 146, 162, 0.3);
}

.expertise-category h4 {
  color: var(--accent-color);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: 0.5px;
  position: relative;
  z-index: 2;
}

.expertise-category h4 i {
  font-size: 1.2rem;
  opacity: 0.9;
  padding: 0.5rem;
  background: rgba(0, 146, 162, 0.1);
  border-radius: 12px;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.expertise-category p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin: 0;
  position: relative;
  z-index: 2;
  text-align: left;
  letter-spacing: 0.3px;
}

.section h2 {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 2.8rem;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
  font-weight: 700;
}

.section h2::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--accent-gradient);
  border-radius: 10px;
  box-shadow: 0 2px 10px var(--box-shadow);
}

.section p {
  font-size: 1.1rem;
  line-height: 1.8;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

/* ==================== SKILLS SECTION ==================== */
.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.skill-category {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 8px 32px var(--box-shadow);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
  transition: left 0.7s;
}

.skill-category:hover::before {
  left: 100%;
}

.skill-category:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 15px 50px var(--box-shadow);
  border-color: var(--accent-color);
}

.skill-category h3 {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.5rem;
  margin-bottom: 1.8rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 600;
}

.skill-category h3 i {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.skill-tag {
  background: var(--accent-gradient);
  color: white;
  padding: 0.6rem 1.3rem;
  border-radius: 25px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: default;
  box-shadow: 0 4px 15px var(--box-shadow);
  position: relative;
  overflow: hidden;
}

.skill-tag::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s, height 0.5s;
}

.skill-tag:hover::before {
  width: 300px;
  height: 300px;
}

.skill-tag:hover {
  transform: translateY(-5px) scale(1.08);
  box-shadow: 0 8px 25px var(--box-shadow);
}

/* ==================== JOURNEY SECTION ==================== */
.journey-container {
  position: relative;
  max-width: 800px;
  margin: 2rem auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.journey-slider {
  width: 100%;
  position: relative;
  overflow: hidden;
}

.journey-slider .slide {
  display: none;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

.journey-slider .slide.active {
  display: block;
  opacity: 1;
}

.journey-slider iframe {
  width: 100%;
  height: 600px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 255, 255, 0.2);
}

.slider-btn {
  background: var(--accent-gradient);
  color: white;
  border: 2px solid transparent;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.3rem;
  transition: var(--transition);
  box-shadow: 0 8px 25px var(--box-shadow);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.slider-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s;
}

.slider-btn:hover::before {
  width: 100%;
  height: 100%;
}

.slider-btn:hover {
  transform: scale(1.15);
  box-shadow: 0 12px 35px var(--box-shadow);
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
}

.dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 2px solid var(--card-border);
  opacity: 0.5;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.dot::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: var(--accent-gradient);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}

.dot.active::before,
.dot:hover::before {
  width: 100%;
  height: 100%;
}

.dot.active,
.dot:hover {
  opacity: 1;
  border-color: var(--accent-color);
  transform: scale(1.3);
}

/* ==================== GRID LAYOUTS ==================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

/* ==================== PROJECT CARDS ==================== */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 8px 32px var(--box-shadow);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform 0.5s;
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  transform: translateY(-15px);
  box-shadow: 0 20px 60px var(--box-shadow);
  border-color: var(--accent-color);
}

.card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--transition);
}

.card:hover img {
  transform: scale(1.1);
}

.card h3 {
  margin: 1.5rem 1.5rem 0.5rem;
  font-size: 1.4rem;
  color: var(--text-color);
  font-weight: 600;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0.5rem 1.5rem 1.5rem;
  flex-grow: 1;
  line-height: 1.6;
}

.card a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  margin: 0 0.5rem 1.5rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
}

.card a:hover {
  background: var(--accent-gradient);
  color: white;
  transform: translateY(-2px);
}

/* ==================== PUBLICATIONS ==================== */
.publications {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.pub-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0;
  border-radius: 20px;
  box-shadow: 0 8px 32px var(--box-shadow);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
}

.pub-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform 0.5s;
}

.pub-card:hover::before {
  transform: scaleX(1);
}

.pub-card:hover {
  transform: translateY(-15px);
  box-shadow: 0 20px 60px var(--box-shadow);
  border-color: var(--accent-color);
}

.pub-img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: var(--transition);
}

.pub-card:hover .pub-img {
  transform: scale(1.08);
}

.pub-content {
  padding: 1.8rem;
}

.pub-content h3 {
  color: var(--text-color);
  font-size: 1.15rem;
  margin-bottom: 1.2rem;
  line-height: 1.6;
  font-weight: 600;
}

.pub-venue {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  margin: 1rem 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.05rem;
}

.pub-venue i {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1.5rem;
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  font-weight: 600;
  border-radius: 50px;
  transition: var(--transition);
  box-shadow: 0 4px 15px var(--box-shadow);
}

.pub-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--box-shadow);
}

/* ==================== EXPERIENCE SECTION ==================== */
/* Professional Timeline Experience Cards */
.experience-timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 3rem;
}

.experience-card {
  background: var(--card-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-radius: 20px;
  padding: 0;
  box-shadow: 0 8px 32px var(--box-shadow);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
}

.experience-card.featured {
  border: 2px solid var(--accent-color);
  box-shadow: 0 15px 50px var(--box-shadow);
  transform: scale(1.02);
}

.experience-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform 0.5s;
}

.experience-card:hover::before {
  transform: scaleX(1);
}

.experience-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px var(--box-shadow);
  border-color: var(--accent-color);
}

.experience-card.featured:hover {
  transform: translateY(-8px) scale(1.02);
}

/* Presentation Preview */
.presentation-preview {
  margin-top: 20px;
  padding: 20px;
  background: rgba(0, 217, 255, 0.05);
  border-radius: 15px;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.presentation-preview h4 {
  color: var(--accent-color);
  margin-bottom: 15px;
  font-size: 1.1em;
  font-weight: 600;
}

.presentation-preview iframe {
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
}

.presentation-preview iframe:hover {
  transform: scale(1.02);
  box-shadow: 0 15px 40px rgba(0, 217, 255, 0.3);
}

/* Experience Photo */
.exp-photo {
  margin: 1.5rem 0;
  text-align: center;
}

.exp-photo img {
  max-width: 350px;
  width: 100%;
  height: auto;
  border-radius: 15px;
  box-shadow: 0 8px 25px rgba(0, 146, 162, 0.2);
  transition: var(--transition);
}

.exp-photo img:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 35px rgba(0, 146, 162, 0.4);
}

.photo-caption {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-style: italic;
  margin-top: 0.8rem;
  text-align: center;
}

/* Writing & Articles Section */
.article-container {
  max-width: 1000px;
  margin: 0 auto;
}

.article-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 8px 32px var(--box-shadow);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px var(--box-shadow);
}

.article-card h3 {
  color: var(--accent-color);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.article-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.article-meta i {
  color: var(--accent-color);
  margin-right: 0.5rem;
}

.article-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.article-preview {
  margin: 1.5rem 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.article-highlights {
  background: rgba(0, 146, 162, 0.05);
  border: 1px solid rgba(0, 146, 162, 0.2);
  border-radius: 10px;
  padding: 1.5rem;
}

.article-highlights h4 {
  color: var(--accent-color);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.article-highlights ul {
  list-style: none;
  padding: 0;
}

.article-highlights li {
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.5;
}

.article-highlights li:before {
  content: "▶";
  color: var(--accent-color);
  position: absolute;
  left: 0;
  font-size: 0.8rem;
}

.article-highlights strong {
  color: var(--accent-color);
  font-weight: 600;
}

.article-quote {
  background: rgba(129, 183, 182, 0.05);
  border: 1px solid rgba(129, 183, 182, 0.2);
  border-radius: 10px;
  padding: 1.5rem;
  position: relative;
}

.article-quote:before {
  content: "\201C";
  color: var(--accent-color);
  font-size: 4rem;
  position: absolute;
  top: -0.5rem;
  left: 1rem;
  opacity: 0.3;
  font-family: serif;
}

.article-quote blockquote {
  color: var(--text-color);
  font-style: italic;
  font-size: 1rem;
  line-height: 1.6;
  margin: 0 0 1rem 0;
  padding-top: 1rem;
}

.article-quote cite {
  color: var(--accent-color);
  font-size: 0.9rem;
  font-weight: 500;
  font-style: normal;
}

.article-links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 500;
  transition: var(--transition);
  box-shadow: 0 4px 15px var(--box-shadow);
}

.article-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--box-shadow);
}

/* Enhanced Article Styles */
.article-container {
  max-width: 1200px;
}

.article-card {
  padding: 2.5rem;
  border-radius: 20px;
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px var(--box-shadow);
}

.article-card h3 {
  font-size: 1.6rem;
}

.article-description {
  margin-bottom: 2rem;
}

.article-preview {
  margin: 2rem 0;
}

.article-highlights {
  border-radius: 15px;
}

/* Testimonials Section */
.article-testimonials {
  background: rgba(129, 183, 182, 0.05);
  border: 1px solid rgba(129, 183, 182, 0.2);
  border-radius: 15px;
  padding: 1.5rem;
}

.article-testimonials h4 {
  color: var(--accent-color);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.testimonial-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.testimonial-item {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 1rem;
  position: relative;
}

.testimonial-item blockquote {
  color: var(--text-color);
  font-style: italic;
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 0 0 0.5rem 0;
}

.testimonial-item cite {
  color: var(--accent-color);
  font-size: 0.85rem;
  font-weight: 500;
  font-style: normal;
}

/* Resources Section */
.article-resources {
  margin: 2rem 0;
  background: rgba(0, 146, 162, 0.03);
  border: 1px solid rgba(0, 146, 162, 0.1);
  border-radius: 15px;
  padding: 2rem;
}

.article-resources h4 {
  color: var(--accent-color);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-align: center;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.resource-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  text-decoration: none;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.resource-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--box-shadow);
  border-color: var(--accent-color);
}

.resource-link i {
  font-size: 1.5rem;
  color: var(--accent-color);
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 146, 162, 0.1);
  border-radius: 8px;
  flex-shrink: 0;
}

.resource-link div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.resource-link strong {
  color: var(--text-color);
  font-size: 0.95rem;
  font-weight: 600;
}

.resource-link span {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Enhanced Article Links */
.article-links {
  margin-top: 2rem;
  justify-content: center;
}

.article-link.primary {
  background: var(--accent-gradient);
}

.article-link.secondary {
  background: linear-gradient(135deg, rgba(129, 183, 182, 0.8) 0%, rgba(0, 146, 162, 0.8) 100%);
  border: 1px solid rgba(129, 183, 182, 0.3);
}

.article-link {
  padding: 1rem 2rem;
}

.article-link:hover {
  transform: translateY(-3px);
}

/* Mobile responsiveness for articles */
@media (max-width: 768px) {
  .article-card {
    padding: 1.5rem;
  }
  
  .article-card h3 {
    font-size: 1.3rem;
  }
  
  .article-meta {
    font-size: 0.8rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .article-preview {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .article-highlights,
  .article-quote {
    padding: 1rem;
  }
  
  .article-quote:before {
    font-size: 3rem;
  }
  
  .article-links {
    flex-direction: column;
  }
  
  /* Enhanced Mobile Styles */
  .article-card {
    padding: 1.5rem;
  }
  
  .article-card h3 {
    font-size: 1.3rem;
  }
  
  .article-preview {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .article-resources {
    padding: 1.5rem;
  }
  
  .resource-grid {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
  
  .resource-link {
    padding: 0.8rem;
  }
  
  .resource-link i {
    width: 2rem;
    height: 2rem;
    font-size: 1.2rem;
  }
  
  .testimonial-grid {
    gap: 0.8rem;
  }
  
  .testimonial-item {
    padding: 0.8rem;
  }
  
  .article-links {
    gap: 0.8rem;
  }
  
  .article-link {
    padding: 0.8rem 1.5rem;
    font-size: 0.9rem;
  }
}

/* Experience Header */
.exp-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 2rem 1rem;
  border-bottom: 1px solid var(--card-border);
}

.exp-logo {
  width: 60px;
  height: 60px;
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 5px 20px var(--box-shadow);
  background: white;
  padding: 0.5rem;
  overflow: hidden;
}

.exp-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.exp-info {
  flex: 1;
}

.exp-info h3 {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 0 0.3rem;
}

.exp-info h4 {
  color: var(--text-color);
  font-size: 1.1rem;
  font-weight: 500;
  margin: 0 0 0.5rem;
  opacity: 0.9;
}

.exp-duration {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: var(--card-bg);
  border: 1px solid var(--accent-color);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-color);
}

.exp-duration.current {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 217, 255, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(0, 217, 255, 0); }
}

/* Experience Content */
.exp-content {
  padding: 1.5rem 2rem 2rem;
}

.exp-summary {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  font-style: italic;
}

.exp-achievements {
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
}

.exp-achievements li {
  margin: 1rem 0;
  padding-left: 0;
  line-height: 1.6;
  color: var(--text-color);
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
}

.exp-achievements li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-gradient);
  border-radius: 50%;
  margin-top: 0.6rem;
  flex-shrink: 0;
}

/* Skill Badges */
.exp-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.skill-badge {
  background: var(--card-bg);
  border: 1px solid var(--accent-color);
  color: var(--accent-color);
  padding: 0.4rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: var(--transition);
}

.skill-badge:hover {
  background: var(--accent-gradient);
  color: white;
  transform: translateY(-2px);
}

/* Achievements Section */
.achievements-section {
  margin-top: 4rem;
  padding: 2.5rem;
  background: var(--card-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-radius: 20px;
  border: 1px solid var(--card-border);
}

.achievements-section h3 {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.achievement-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 15px;
  border: 1px solid var(--card-border);
  transition: var(--transition);
}

.achievement-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--box-shadow);
  border-color: var(--accent-color);
}

.achievement-item i {
  width: 50px;
  height: 50px;
  background: var(--accent-gradient);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: white;
  flex-shrink: 0;
}

.achievement-item h4 {
  color: var(--text-color);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.3rem;
}

.achievement-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.4;
}

/* ==================== CERTIFICATIONS SECTION ==================== */
.certifications-container {
  max-width: 1200px;
  margin: 0 auto;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.cert-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 15px;
  padding: 1rem;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 6px 20px var(--box-shadow);
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.cert-item:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 12px 30px var(--box-shadow);
}

.cert-item img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 0.8rem;
  box-shadow: 0 3px 10px rgba(0, 146, 162, 0.2);
  transition: var(--transition);
}

.cert-item:hover img {
  transform: scale(1.05);
}

.cert-icon {
  width: 100%;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 146, 162, 0.1);
  border-radius: 8px;
  margin-bottom: 0.8rem;
  transition: var(--transition);
}

.cert-icon i {
  font-size: 3rem;
  color: var(--accent-color);
  opacity: 0.8;
}

.cert-item:hover .cert-icon {
  background: rgba(0, 146, 162, 0.2);
  transform: scale(1.05);
}

.cert-item:hover .cert-icon i {
  opacity: 1;
}

.cert-type {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--accent-color);
  color: white;
  font-size: 0.6rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 10px;
  text-transform: uppercase;
}

.cert-item h3 {
  color: var(--accent-color);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  line-height: 1.2;
}

.cert-item p {
  color: var(--text-secondary);
  font-size: 0.75rem;
  line-height: 1.3;
  margin: 0;
}

.cert-placeholder {
  background: rgba(0, 146, 162, 0.05);
  border: 2px dashed rgba(0, 146, 162, 0.3);
  border-radius: 20px;
  padding: 3rem 2rem;
  text-align: center;
  transition: var(--transition);
}

.cert-placeholder:hover {
  border-color: var(--accent-color);
  background: rgba(0, 146, 162, 0.1);
}

.cert-placeholder i {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
  opacity: 0.7;
}

.cert-placeholder h3 {
  color: var(--accent-color);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
}

.cert-placeholder p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  max-width: 400px;
  margin: 0 auto;
}

/* ==================== EDUCATION SECTION ==================== */
.education-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.edu-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 8px 32px var(--box-shadow);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
}

.edu-card:hover {
  transform: translateY(-15px) scale(1.03);
  box-shadow: 0 20px 60px var(--box-shadow);
  border-color: var(--accent-color);
}

.edu-card h3 {
  margin: 0 0 1.2rem;
  font-size: 1.6rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.edu-card p {
  margin: 0.8rem 0;
  font-size: 1.05rem;
  color: var(--text-color);
}

.edu-date {
  display: inline-block;
  margin-top: 1.5rem;
  font-size: 1rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  border: 2px solid var(--accent-color);
}

/* ==================== CONTACT SECTION ==================== */
.contact-intro {
  text-align: center;
  font-size: 1.1rem;
  margin-bottom: 3rem;
  opacity: 0.9;
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.8rem;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: 15px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
  transition: left 0.6s;
}

.contact-item:hover::before {
  left: 100%;
}

.contact-item:hover {
  transform: translateX(15px);
  box-shadow: 0 10px 35px var(--box-shadow);
  border-color: var(--accent-color);
}

.contact-item i {
  font-size: 2.2rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: 0.3rem;
}

.contact-item h4 {
  margin: 0 0 0.6rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.2rem;
  font-weight: 600;
}

.contact-item a {
  color: var(--text-color);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

.contact-item a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width 0.3s;
}

.contact-item a:hover::after {
  width: 100%;
}

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

/* Contact Form */
.contact-form {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 8px 32px var(--box-shadow);
  border: 1px solid var(--card-border);
}

.form-group {
  margin-bottom: 1.8rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.8rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
  font-size: 1.05rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.3rem;
  border: 2px solid var(--card-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-color);
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 20px var(--box-shadow);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.submit-btn {
  width: 100%;
  padding: 1.2rem;
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  box-shadow: 0 8px 25px var(--box-shadow);
  position: relative;
  overflow: hidden;
}

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

.submit-btn:hover::before {
  width: 400px;
  height: 400px;
}

.submit-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 45px var(--box-shadow);
}

/* ==================== SCROLL TO TOP BUTTON ==================== */
.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 55px;
  height: 55px;
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 8px 30px var(--box-shadow);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

.scroll-to-top:hover {
  transform: translateY(-8px) scale(1.1);
  box-shadow: 0 12px 40px var(--box-shadow);
  animation: none;
}

/* ==================== THEME TOGGLE BUTTON ==================== */
.theme-toggle {
  position: fixed;
  bottom: 20px;
  left: 20px;
  background: var(--accent-gradient);
  color: white;
  border: none;
  padding: 0.6rem 1rem;
  border-radius: 50px;
  z-index: 1001;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 8px 25px var(--box-shadow);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  white-space: nowrap;
  min-width: auto;
}

.theme-toggle i {
  font-size: 1.1rem;
  transition: var(--transition);
}

.theme-toggle::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s, height 0.5s;
  z-index: -1;
}

.theme-toggle:hover::before {
  width: 200px;
  height: 200px;
}

.theme-toggle:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 35px var(--box-shadow);
}

.theme-toggle:hover i {
  transform: rotate(180deg);
}

/* ==================== FOOTER ==================== */
footer {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 3rem 2rem;
  border-top: 2px solid transparent;
  border-image: var(--accent-gradient) 1;
  margin-top: 4rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-content p {
  margin: 0.8rem 0;
  color: var(--text-color);
  font-size: 1.05rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin: 2rem 0;
}

.social-links a {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  border: 2px solid var(--card-border);
  border-radius: 50%;
  color: var(--accent-color);
  font-size: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.social-links a::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: var(--accent-gradient);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s;
  z-index: -1;
}

.social-links a:hover::before {
  width: 100%;
  height: 100%;
}

.social-links a:hover {
  transform: translateY(-8px) rotate(360deg);
  color: white;
  border-color: transparent;
  box-shadow: 0 10px 30px var(--box-shadow);
}

.footer-note {
  margin-top: 1.5rem;
  font-size: 1rem;
  color: var(--text-secondary);
}

.footer-note i {
  color: #ff6b9d;
  animation: heartbeat 1.5s ease-in-out infinite;
  display: inline-block;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); }
}

/* ==================== FUN SECTION ==================== */
#fun {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 3rem 2rem;
  margin: 2rem auto;
  max-width: 800px;
}

#fun p {
  font-size: 1.15rem;
  line-height: 1.8;
}

#fun a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  font-weight: 600;
  border-radius: 50px;
  transition: var(--transition);
  margin-top: 1rem;
  box-shadow: 0 5px 20px var(--box-shadow);
}

#fun a:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 30px var(--box-shadow);
}

/* ==================== FADE-IN ANIMATION ==================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.appear {
  opacity: 1;
  transform: translateY(0);
}

/* ==================== RESPONSIVE DESIGN ==================== */
/* Journey Section Styles */
.journey-container {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.journey-slider {
  position: relative;
  overflow: hidden;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.journey-slider .slide {
  display: none;
  width: 100%;
  height: 800px;
}

.journey-slider .slide.active {
  display: block;
}

.journey-slider iframe {
  width: 100%;
  height: 800px;
  border: none;
  border-radius: 15px;
  display: block;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--accent-gradient);
  color: white;
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  transition: var(--transition);
  z-index: 10;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.slider-btn:hover {
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.slider-btn.prev {
  left: -25px;
}

.slider-btn.next {
  right: -25px;
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.slider-dot.active {
  background: var(--accent-color);
  transform: scale(1.2);
}

/* Large screens - ensure proper spacing */
@media (min-width: 1400px) {
  .nav-wrapper {
    max-width: 1600px;
  }
  
  .nav-links {
    gap: 1.5rem;
  }
}

/* Medium screens - fix navigation overlap */
@media (max-width: 1200px) and (min-width: 769px) {
  .nav-links {
    gap: 0.8rem;
  }
  
  .nav-links a {
    font-size: 0.9rem;
  }
  
  .resume-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }
}

@media (max-width: 768px) {
  /* 3D Background Mobile Optimizations */
  #bg-canvas {
    opacity: 0.4; /* Reduce opacity on mobile for better performance */
  }
  
  /* Mobile Navigation with Hamburger Menu */
  .navbar {
    display: flex !important;
  }
  
  .nav-wrapper {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0.5rem 1rem;
  }
  
  .hamburger {
    display: flex !important;
    order: 2;
    z-index: 1001;
  }
  
  .nav-links {
    position: fixed !important;
    top: 0 !important;
    right: -100% !important;
    width: 280px !important;
    max-width: 85vw !important;
    height: 100vh !important;
    background: var(--bg-color) !important;
    backdrop-filter: blur(20px) !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    justify-content: flex-start !important;
    padding: 5rem 1.5rem 2rem !important;
    gap: 0.5rem !important;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3) !important;
    transition: right 0.3s ease !important;
    z-index: 1000 !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    border-left: 1px solid var(--card-border) !important;
    margin-left: 0 !important;
    flex: none !important;
    min-width: 0 !important;
  }
  
  .nav-links.active {
    right: 0 !important;
  }
  
  .nav-links a {
    display: flex !important;
    width: 100% !important;
    padding: 1rem !important;
    font-size: 1rem !important;
    border-radius: 12px !important;
    text-align: left !important;
    justify-content: flex-start !important;
    align-items: center !important;
    white-space: nowrap !important;
    opacity: 1 !important;
    visibility: visible !important;
    color: var(--text-color) !important;
  }
  
  .nav-links .resume-btn {
    margin-left: 0 !important;
    margin-top: 0.5rem !important;
    width: 100% !important;
    display: flex !important;
  }
  
  /* Hamburger animation when active */
  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }
  
  /* Overlay when menu is open */
  .nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  
  .nav-overlay.active {
    display: block;
    opacity: 1;
  }
  
  /* Journey Section Mobile */
  .journey-container {
    max-width: 95%;
    margin: 0 auto;
  }
  
  .journey-slider .slide {
    height: 700px;
  }
  
  .slider-btn {
    width: 40px;
    height: 40px;
    font-size: 14px;
  }
  
  .slider-btn.prev {
    left: -20px;
  }
  
  .slider-btn.next {
    right: -20px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section h2 {
    font-size: 2rem;
  }

  .journey-container {
    flex-direction: column;
  }

  .journey-slider iframe {
    height: 400px;
  }

  .slider-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .contact-container {
    grid-template-columns: 1fr;
  }

  .grid {
    grid-template-columns: 1fr;
  }

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

  .scroll-to-top {
    bottom: 20px;
    right: 20px;
  }

  .theme-toggle {
    bottom: 15px;
    left: 15px;
    padding: 0.6rem 0.8rem;
    font-size: 0.8rem;
  }

  .theme-toggle:hover {
    transform: scale(1.05);
  }

  /* Experience Section Mobile */
  .exp-header {
    flex-direction: column;
  text-align: center;
    gap: 1rem;
    padding: 1.5rem;
  }

  .exp-logo {
    width: 50px;
    height: 50px;
    padding: 0.3rem;
  }

  .exp-info h3 {
  font-size: 1.2rem;
  }

  .exp-info h4 {
    font-size: 1rem;
  }

  .exp-content {
    padding: 1rem 1.5rem 1.5rem;
  }

  .exp-skills {
    justify-content: center;
  }

  .achievements-grid {
    grid-template-columns: 1fr;
  }

  .achievement-item {
    flex-direction: column;
  text-align: center;
    gap: 0.8rem;
  }
}

@media (max-width: 480px) {
  .nav-wrapper {
    padding: 0 1rem;
  }
  
  .hamburger {
    padding: 0.4rem;
  }
  
  .hamburger span {
    width: 24px;
    height: 2.5px;
  }
  
  .nav-links {
    padding: 1.5rem;
    gap: 1rem;
  }
  
  .nav-links a {
    padding: 0.9rem 1.2rem;
    font-size: 1rem;
  }
  

  .section {
    padding: 3rem 1rem;
  }
  
  /* Expertise Highlights Mobile */
  .expertise-highlights {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin: 2rem 0;
    padding: 0 0.5rem;
  }
  
  .expertise-category {
    padding: 1.5rem;
    border-radius: 16px;
  }
  
  .expertise-category h4 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
  }
  
  .expertise-category h4 i {
    width: 2.2rem;
    height: 2.2rem;
    font-size: 1rem;
  }
  
  .expertise-category p {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .hero {
    padding: calc(var(--navbar-height) + 2rem) 1rem 2rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .profile-img {
    width: 150px;
    height: 150px;
  }

  .skills-container,
  .education-container {
    grid-template-columns: 1fr;
  }
  
  /* Certifications Mobile */
  .cert-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
  }
  
  .cert-item {
    padding: 0.8rem;
  }
  
  .cert-item img {
    height: 100px;
    margin-bottom: 0.6rem;
  }
  
  .cert-item h3 {
    font-size: 0.85rem;
    margin-bottom: 0.2rem;
  }
  
  .cert-item p {
    font-size: 0.7rem;
  }
}