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

:root {
  /* Dark Theme Colors (Default) */
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-accent: #fbbf24;
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --shadow-color: rgba(0, 0, 0, 0.3);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --gradient-secondary: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  --gradient-bg: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e2e8f0;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --glass-bg: rgba(99, 102, 241, 0.1);
  --glass-border: rgba(99, 102, 241, 0.2);
  --shadow-color: rgba(99, 102, 241, 0.15);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Poppins", sans-serif;
  background: var(--gradient-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== NOTIFICATION SYSTEM ===== */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 1rem 1.5rem;
  z-index: 10000;
  transform: translateX(400px);
  opacity: 0;
  transition: all 0.3s ease;
  max-width: 350px;
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification.success {
  border-left: 4px solid var(--success-color);
}

.notification.error {
  border-left: 4px solid var(--error-color);
}

.notification-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.notification-icon {
  font-size: 1.2rem;
}

.notification.success .notification-icon {
  color: var(--success-color);
}

.notification.error .notification-icon {
  color: var(--error-color);
}

.notification-message {
  color: var(--text-primary);
  font-size: 0.9rem;
}

/* ===== PWA INSTALL BANNER ===== */
.pwa-install-banner {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--gradient-primary);
  color: white;
  padding: 1rem;
  z-index: 10000;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}

.pwa-install-banner.show {
  transform: translateY(0);
}

.install-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.install-btn {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.5rem 1rem;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.install-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.close-install {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--bg-primary) 0%, #000 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-content {
  text-align: center;
}

.loading-logo {
  font-size: 3rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 2rem;
  position: relative;
}

.loading-logo::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, transparent, var(--primary-color), transparent);
  animation: logoShimmer 2s ease-in-out infinite;
}

@keyframes logoShimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(99, 102, 241, 0.3);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

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

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

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(15, 15, 35, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(15, 15, 35, 0.95);
  box-shadow: 0 4px 20px var(--shadow-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle,
.chat-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.theme-toggle:hover,
.chat-toggle:hover {
  background: var(--primary-color);
  transform: scale(1.1);
}

.chat-toggle.active {
  background: var(--primary-color);
  color: white;
}

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

.bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: 0.3s;
}

/* ===== HERO SECTION ===== */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Animated Stars Background */
.stars-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.stars,
.stars2,
.stars3 {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
}

.stars {
  background-image: radial-gradient(2px 2px at 20px 30px, #eee, transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(1px 1px at 90px 40px, #fff, transparent);
  background-repeat: repeat;
  background-size: 200px 100px;
  animation: zoom 20s infinite linear;
}

.stars2 {
  background-image: radial-gradient(1px 1px at 40px 60px, #fff, transparent),
    radial-gradient(1px 1px at 120px 10px, rgba(255, 255, 255, 0.6), transparent);
  background-repeat: repeat;
  background-size: 300px 200px;
  animation: zoom 40s infinite linear;
}

.stars3 {
  background-image: radial-gradient(1px 1px at 10px 10px, #fff, transparent),
    radial-gradient(2px 2px at 110px 150px, rgba(255, 255, 255, 0.4), transparent);
  background-repeat: repeat;
  background-size: 400px 300px;
  animation: zoom 60s infinite linear;
}

@keyframes zoom {
  from {
    transform: translateZ(0px);
  }
  to {
    transform: translateZ(1000px);
  }
}

.hero-content {
  text-align: center;
  z-index: 2;
  max-width: 800px;
  padding: 0 2rem;
}

.greeting {
  font-size: 1.2rem;
  color: var(--text-accent);
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s ease 0.5s forwards;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: 1rem;
  min-height: 1.2em;
}

.typewriter {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cursor {
  color: var(--primary-color);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 1s ease 1s forwards;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 1s ease 1.5s forwards;
}

.btn-primary,
.btn-secondary {
  padding: 1rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

.cv-download {
  margin-top: 2rem;
  opacity: 0;
  animation: fadeInUp 1s ease 2s forwards;
}

.btn-cv {
  padding: 0.75rem 1.5rem;
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  backdrop-filter: blur(10px);
}

.btn-cv:hover {
  background: var(--secondary-color);
  color: white;
  transform: translateY(-2px);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  animation: fadeInUp 1s ease 2s forwards;
}

.scroll-arrow {
  width: 2px;
  height: 30px;
  background: var(--primary-color);
  position: relative;
  animation: scroll 2s infinite;
}

.scroll-arrow::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: -3px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
  transform: rotate(45deg);
}

@keyframes scroll {
  0%,
  100% {
    opacity: 0;
    transform: translateY(-10px);
  }
  50% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== ABOUT SECTION ===== */
.about {
  padding: 100px 0;
  position: relative;
  background: var(--bg-secondary);
}

.parallax-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
  opacity: 0.3;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
  margin-bottom: 4rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  position: relative;
  z-index: 2;
}

.about-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.timeline-container {
  overflow-x: auto;
  padding: 2rem 0;
}

.timeline {
  display: flex;
  gap: 2rem;
  min-width: max-content;
  padding: 0 2rem;
}

.timeline-item {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 1.5rem;
  min-width: 250px;
  text-align: center;
  transition: all 0.3s ease;
}

.timeline-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-color);
}

.timeline-date {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.timeline-content h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.timeline-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.hobbies {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.hobby-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.hobby-item:hover {
  transform: translateY(-5px) scale(1.05);
  background: var(--primary-color);
  color: white;
}

.hobby-item i {
  font-size: 2rem;
  color: var(--primary-color);
  transition: all 0.3s ease;
}

.hobby-item:hover i {
  color: white;
  transform: rotate(360deg);
}

/* ===== SKILLS SECTION ===== */
.skills {
  padding: 100px 0;
  background: var(--bg-primary);
}

.skills-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.skill-category {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px var(--shadow-color);
}

.skill-category h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.skill-category p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.skills-3d-container {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#skills-canvas {
  width: 100%;
  height: 100%;
  cursor: grab;
}

#skills-canvas:active {
  cursor: grabbing;
}

.skills-ui {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 300px;
  z-index: 10;
}

.skill-info {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 1.5rem;
  transition: all 0.3s ease;
}

#skill-name {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.skill-level {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.level-bar {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  overflow: hidden;
}

.level-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

#skill-percentage {
  font-size: 0.9rem;
  color: var(--text-accent);
  font-weight: 600;
}

#skill-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.skill-tools {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.skill-tools span {
  padding: 0.25rem 0.5rem;
  background: var(--primary-color);
  color: white;
  border-radius: 10px;
  font-size: 0.8rem;
}

/* ===== PROJECTS SECTION ===== */
.projects {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.project-filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  overflow: hidden;
  transition: all 0.3s ease;
  opacity: 1;
  transform: scale(1);
  position: relative;
  overflow: hidden;
}

.project-card.hidden {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-color);
}

.project-image {
  position: relative;
  overflow: hidden;
  height: 200px;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  opacity: 0;
  transition: all 0.3s ease;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.btn-view,
.btn-case-study {
  padding: 0.5rem 1rem;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.btn-case-study {
  background: var(--secondary-color);
}

.btn-view:hover,
.btn-case-study:hover {
  transform: scale(1.05);
}

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-info p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.project-tech {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.project-tech span {
  padding: 0.25rem 0.75rem;
  background: var(--primary-color);
  color: white;
  border-radius: 15px;
  font-size: 0.8rem;
}

/* ===== CASE STUDIES SECTION ===== */
.case-studies {
  padding: 100px 0;
  background: var(--bg-primary);
}

.case-study-selector {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.case-btn {
  padding: 0.75rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.case-btn:hover,
.case-btn.active {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.case-study-content {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 2rem;
  min-height: 500px;
}

.case-study {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.case-study.active {
  opacity: 1;
  transform: translateY(0);
}

.case-header {
  text-align: center;
  margin-bottom: 3rem;
}

.case-title {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

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

.case-section {
  margin-bottom: 2rem;
}

.case-section h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.case-section p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.case-tech-stack {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tech-tag {
  padding: 0.5rem 1rem;
  background: var(--primary-color);
  color: white;
  border-radius: 20px;
  font-size: 0.9rem;
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.metric-card {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px var(--shadow-color);
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.metric-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== ENHANCED PLAYGROUND SECTION ===== */
.playground {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.playground-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.language-selector {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.lang-btn {
  padding: 0.5rem 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.lang-btn:hover,
.lang-btn.active {
  background: var(--primary-color);
  color: white;
}

.playground-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.action-btn {
  padding: 0.5rem 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.playground-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  height: 700px;
  margin-bottom: 2rem;
}

.code-editors {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.code-editor-advanced {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.code-output-advanced {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.editor-header,
.output-header {
  background: var(--bg-tertiary);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--glass-border);
}

.fullscreen-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.fullscreen-btn:hover {
  color: var(--primary-color);
  background: var(--glass-bg);
}

.code-editor-wrapper {
  flex: 1;
  position: relative;
  display: flex;
}

.code-editor-textarea {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: "Courier New", monospace;
  font-size: 14px;
  padding: 1rem;
  resize: none;
  outline: none;
  line-height: 1.5;
  tab-size: 2;
}

.output-content {
  flex: 1;
  position: relative;
}

#output-frame-advanced {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
}

/* ===== CONTACT SECTION ===== */
.contact {
  padding: 100px 0;
  background: var(--bg-primary);
}

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

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

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateX(10px);
  background: var(--primary-color);
  color: white;
}

.contact-item i {
  font-size: 1.2rem;
  color: var(--primary-color);
  transition: all 0.3s ease;
}

.contact-item:hover i {
  color: white;
}

.glass-form {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 2rem;
}

.form-group {
  position: relative;
  margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

.form-group label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  pointer-events: none;
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
  top: -0.5rem;
  left: 0.5rem;
  font-size: 0.8rem;
  color: var(--primary-color);
  background: var(--bg-primary);
  padding: 0 0.5rem;
}

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

.btn-submit {
  width: 100%;
  padding: 1rem;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* ===== AI CHATBOT ===== */
.chatbot-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 350px;
  height: 500px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  display: flex;
  flex-direction: column;
  transform: translateY(100%) scale(0.8);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 1500;
  box-shadow: 0 20px 40px var(--shadow-color);
}

.chatbot-container.show {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

.chatbot-header {
  background: var(--gradient-primary);
  color: white;
  padding: 1rem;
  border-radius: 15px 15px 0 0;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.chatbot-avatar {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.chatbot-info {
  flex: 1;
}

.chatbot-info h4 {
  margin: 0;
  font-size: 1rem;
}

.status {
  font-size: 0.8rem;
  opacity: 0.8;
}

.status.online::before {
  content: "●";
  color: var(--success-color);
  margin-right: 0.5rem;
}

.chatbot-close {
  background: none;
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.chatbot-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.chatbot-messages {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  display: flex;
  gap: 0.5rem;
  animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.user-message {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 30px;
  height: 30px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: white;
  flex-shrink: 0;
}

.user-message .message-avatar {
  background: var(--secondary-color);
}

.message-content {
  background: var(--bg-secondary);
  padding: 0.75rem;
  border-radius: 10px;
  max-width: 80%;
  border: 1px solid var(--glass-border);
}

.user-message .message-content {
  background: var(--primary-color);
  color: white;
}

.message-content p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.4;
}

.chatbot-input {
  padding: 1rem;
  border-top: 1px solid var(--glass-border);
  display: flex;
  gap: 0.5rem;
}

#chatbot-input-field {
  flex: 1;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 0.5rem 1rem;
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
}

#chatbot-input-field:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

#chatbot-send {
  background: var(--primary-color);
  border: none;
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

#chatbot-send:hover {
  background: var(--secondary-color);
  transform: scale(1.05);
}

/* ===== MODAL ===== */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  max-width: 800px;
  width: 90%;
  max-height: 90%;
  overflow-y: auto;
  position: relative;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.close-modal {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 2rem;
  color: var(--text-secondary);
  cursor: pointer;
  z-index: 10;
  transition: all 0.3s ease;
}

.close-modal:hover {
  color: var(--primary-color);
  transform: scale(1.1);
}

.modal-body {
  padding: 2rem;
}

.modal-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

.modal-tech {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.modal-tech span {
  padding: 0.5rem 1rem;
  background: var(--primary-color);
  color: white;
  border-radius: 20px;
  font-size: 0.9rem;
}

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

.btn-link {
  padding: 0.75rem 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 25px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* ===== WOW FEATURES ===== */
/* Floating Particles Background */
.particles-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 50%;
  opacity: 0.6;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

/* Matrix Rain Effect */
.matrix-rain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.1;
}

/* Glitch Effect */
.glitch {
  position: relative;
  animation: glitch 2s infinite;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.glitch::before {
  animation: glitch-1 0.5s infinite;
  color: #ff0000;
  z-index: -1;
}

.glitch::after {
  animation: glitch-2 0.5s infinite;
  color: #00ff00;
  z-index: -2;
}

@keyframes glitch {
  0%,
  100% {
    transform: translate(0);
  }
  20% {
    transform: translate(-2px, 2px);
  }
  40% {
    transform: translate(-2px, -2px);
  }
  60% {
    transform: translate(2px, 2px);
  }
  80% {
    transform: translate(2px, -2px);
  }
}

@keyframes glitch-1 {
  0%,
  100% {
    transform: translate(0);
  }
  20% {
    transform: translate(-2px, 2px);
  }
  40% {
    transform: translate(-2px, -2px);
  }
  60% {
    transform: translate(2px, 2px);
  }
  80% {
    transform: translate(2px, -2px);
  }
}

@keyframes glitch-2 {
  0%,
  100% {
    transform: translate(0);
  }
  20% {
    transform: translate(2px, -2px);
  }
  40% {
    transform: translate(2px, 2px);
  }
  60% {
    transform: translate(-2px, -2px);
  }
  80% {
    transform: translate(-2px, 2px);
  }
}

/* Holographic Effect */
.holographic {
  background: linear-gradient(45deg, #ff0080, #ff8c00, #40e0d0, #ff0080, #ff8c00, #40e0d0);
  background-size: 400% 400%;
  animation: holographic 3s ease infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* Floating Code Snippets */
.floating-code {
  position: fixed;
  font-family: "Courier New", monospace;
  font-size: 12px;
  color: var(--primary-color);
  opacity: 0.3;
  pointer-events: none;
  z-index: 1;
  animation: floatCode 15s linear infinite;
}

@keyframes floatCode {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Interactive Cursor Trail */
.cursor-trail {
  position: fixed;
  width: 20px;
  height: 20px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transition: all 0.1s ease;
  mix-blend-mode: difference;
}

/* Morphing Shapes */
.morphing-shape {
  position: absolute;
  width: 100px;
  height: 100px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  opacity: 0.1;
  animation: morph 8s ease-in-out infinite;
}

@keyframes morph {
  0%,
  100% {
    border-radius: 50%;
    transform: rotate(0deg) scale(1);
  }
  25% {
    border-radius: 25%;
    transform: rotate(90deg) scale(1.2);
  }
  50% {
    border-radius: 0%;
    transform: rotate(180deg) scale(0.8);
  }
  75% {
    border-radius: 75%;
    transform: rotate(270deg) scale(1.1);
  }
}

/* Sound Visualizer */
.sound-visualizer {
  position: fixed;
  bottom: 20px;
  left: 20px;
  display: flex;
  align-items: end;
  gap: 2px;
  z-index: 1000;
}

.sound-bar {
  width: 4px;
  background: var(--primary-color);
  border-radius: 2px;
  animation: soundWave 1s ease-in-out infinite;
}

.sound-bar:nth-child(1) {
  height: 20px;
  animation-delay: 0s;
}

.sound-bar:nth-child(2) {
  height: 30px;
  animation-delay: 0.1s;
}

.sound-bar:nth-child(3) {
  height: 25px;
  animation-delay: 0.2s;
}

.sound-bar:nth-child(4) {
  height: 35px;
  animation-delay: 0.3s;
}

.sound-bar:nth-child(5) {
  height: 20px;
  animation-delay: 0.4s;
}

@keyframes soundWave {
  0%,
  100% {
    transform: scaleY(1);
  }
  50% {
    transform: scaleY(0.3);
  }
}

/* Interactive Terminal */
.terminal-container {
  position: fixed;
  bottom: -300px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: rgba(0, 0, 0, 0.9);
  border: 1px solid var(--primary-color);
  border-radius: 10px;
  transition: all 0.3s ease;
  z-index: 2000;
  font-family: "Courier New", monospace;
}

.terminal-container.show {
  bottom: 20px;
}

.terminal-header {
  background: var(--primary-color);
  color: white;
  padding: 10px;
  border-radius: 10px 10px 0 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.terminal-close {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

.terminal-content {
  padding: 20px;
  height: calc(100% - 60px);
  overflow-y: auto;
  color: #00ff00;
}

.terminal-line {
  margin-bottom: 10px;
  animation: typewriter 2s steps(40, end);
}

@keyframes typewriter {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

/* Floating Social Icons */
.floating-social {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 20px;
  z-index: 1000;
}

.social-icon {
  width: 50px;
  height: 50px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  animation: float 3s ease-in-out infinite;
}

.social-icon:hover {
  transform: scale(1.2) rotate(360deg);
  background: var(--primary-color);
  color: white;
  box-shadow: 0 0 20px var(--primary-color);
}

.social-icon:nth-child(1) {
  animation-delay: 0s;
}

.social-icon:nth-child(2) {
  animation-delay: 0.5s;
}

.social-icon:nth-child(3) {
  animation-delay: 1s;
}

.social-icon:nth-child(4) {
  animation-delay: 1.5s;
}

/* Dynamic Background Sections */
.section-bg-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

.bg-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--primary-color);
  border-radius: 50%;
  opacity: 0.4;
  animation: bgFloat 10s linear infinite;
}

@keyframes bgFloat {
  0% {
    transform: translateY(100vh) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 0.4;
  }
  90% {
    opacity: 0.4;
  }
  100% {
    transform: translateY(-100px) translateX(100px);
    opacity: 0;
  }
}

/* Music Control */
.music-control {
  position: fixed;
  top: 50%;
  left: 20px;
  transform: translateY(-50%);
  width: 60px;
  height: 60px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.music-control:hover {
  transform: translateY(-50%) scale(1.1);
  background: var(--primary-color);
  color: white;
  box-shadow: 0 0 20px var(--primary-color);
}

.music-control.playing {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    transform: translateY(-50%) scale(1);
  }
  50% {
    transform: translateY(-50%) scale(1.1);
  }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(10px);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    padding: 2rem 0;
  }

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

  .nav-menu li {
    margin: 1rem 0;
  }

  .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);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .skills-3d-container {
    height: 400px;
  }

  .skills-ui {
    position: static;
    width: 100%;
    margin-top: 2rem;
  }

  .playground-container {
    grid-template-columns: 1fr;
    height: auto;
  }

  .code-editors {
    display: none;
  }

  .code-output-advanced {
    height: 400px;
  }

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

  .timeline {
    padding: 0 1rem;
  }

  .timeline-item {
    min-width: 200px;
  }

  .chatbot-container {
    width: 300px;
    height: 400px;
    bottom: 10px;
    right: 10px;
  }

  .case-study-selector {
    flex-direction: column;
    align-items: center;
  }

  .floating-social {
    right: 10px;
    gap: 15px;
  }

  .social-icon {
    width: 40px;
    height: 40px;
  }

  .terminal-container {
    width: 90%;
    height: 250px;
  }

  .music-control {
    left: 10px;
    width: 50px;
    height: 50px;
  }

  .sound-visualizer {
    left: 10px;
    bottom: 10px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-content {
    padding: 0 1rem;
  }

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

  .modal-content {
    width: 95%;
    margin: 1rem;
  }

  .modal-body {
    padding: 1rem;
  }

  .btn-primary,
  .btn-secondary {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }

  .chatbot-container {
    width: calc(100vw - 20px);
    height: 70vh;
    bottom: 10px;
    right: 10px;
    left: 10px;
  }

  .playground-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .language-selector,
  .playground-actions {
    justify-content: center;
  }

  .playground-container {
    height: 500px;
  }

  .code-output-advanced {
    height: 300px;
  }
}

/* ===== UTILITY CLASSES ===== */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mb-1 {
  margin-bottom: 0.5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-3 {
  margin-bottom: 1.5rem;
}

.mb-4 {
  margin-bottom: 2rem;
}

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-3 {
  margin-top: 1.5rem;
}

.mt-4 {
  margin-top: 2rem;
}

.hidden {
  display: none;
}

.visible {
  display: block;
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

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

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.6s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.6s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}