/* CSS Variables for Theme */
:root {
  --primary-bg: #FFFFFF;
  --secondary-bg: #F8F9FA;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --accent-color: #00AEEF;
  --accent-hover: #0088CC;
  --border-color: #E5E5E5;
  --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --primary-bg: #1A1A1A;
  --secondary-bg: #2A2A2A;
  --text-primary: #FFFFFF;
  --text-secondary: #CCCCCC;
  --border-color: #333333;
  --shadow-light: 0 2px 10px rgba(255, 255, 255, 0.1);
  --shadow-medium: 0 4px 20px rgba(255, 255, 255, 0.15);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--primary-bg);
  transition: var(--transition);
  padding-top: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 1rem;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent-color);
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 3rem;
}

.accent-text {
  color: var(--accent-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

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

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

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

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

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.9rem;
}

.btn-github {
  background: var(--accent-color) !important;
  color: white !important;
  border: 2px solid var(--accent-color) !important;
}

.btn-github:hover {
  background: var(--accent-hover) !important;
  border-color: var(--accent-hover) !important;
  transform: translateY(-2px);
}

.project-text-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.project-text-link:hover {
  color: var(--accent-hover);
  transform: translateX(5px);
}

.project-text-link i {
  font-size: 1.1rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-color);
  z-index: 9999;
  transition: var(--transition);
  height: 80px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .navbar {
  background: rgba(26, 26, 26, 0.98);
  box-shadow: 0 2px 20px rgba(255, 255, 255, 0.1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

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

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  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 {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--secondary-bg);
  transform: rotate(180deg);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

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

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 0 50px;
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.1;
  opacity: 0;
  animation: fadeInUp 1s ease-out 0.5s forwards;
}

.hero-title .accent-text {
  color: var(--accent-color);
  animation: glow 2s ease-in-out infinite alternate;
}

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

@keyframes glow {
  from {
    text-shadow: 0 0 5px var(--accent-color);
  }
  to {
    text-shadow: 0 0 20px var(--accent-color), 0 0 30px var(--accent-color);
  }
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 1s ease-out 2s forwards;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0;
  animation: fadeInUp 1s ease-out 3s forwards;
}

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

.hero-social {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.hero-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--secondary-bg);
  color: var(--text-primary);
  border-radius: 50%;
  text-decoration: none;
  font-size: 1.2rem;
  transition: var(--transition);
}

.hero-social a:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-3px);
}

/* About Section */
.about {
  padding-top: 180px;
  padding-bottom: 100px;
  background: var(--secondary-bg);
  scroll-margin-top: 120px;
  position: relative;
  z-index: 1;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.7;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
  padding: 1.5rem;
  background: var(--primary-bg);
  border-radius: 10px;
  box-shadow: var(--shadow-light);
}

.stat h3 {
  font-size: 2rem;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.timeline {
  position: relative;
  padding-left: 2rem;
}

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

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 2rem;
}

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 0;
  width: 12px;
  height: 12px;
  background: var(--accent-color);
  border-radius: 50%;
  transform: translateX(-50%);
}

.timeline-content h4 {
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.timeline-date {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

/* Skills Section */
.skills {
  padding-top: 180px;
  padding-bottom: 100px;
  scroll-margin-top: 120px;
  position: relative;
  z-index: 1;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 3rem;
}

.skill-category {
  background: var(--secondary-bg);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

.skill-category h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
}

.skill-item {
  margin-bottom: 1.5rem;
}

.skill-name {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.skill-bar {
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
  border-radius: 4px;
  width: 0;
  transition: width 1s ease-in-out;
}

/* Projects Section */
.projects {
  padding-top: 180px;
  padding-bottom: 100px;
  background: var(--secondary-bg);
  scroll-margin-top: 120px;
  position: relative;
  z-index: 1;
}

.project-filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 16px;
  background: transparent;
  border: 2px solid var(--border-color);
  border-radius: 25px;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn.active,
.filter-btn:hover {
  border-color: var(--accent-color);
  background: var(--accent-color);
  color: white;
}

.project-search {
  position: relative;
  max-width: 400px;
  margin: 0 auto 3rem;
}

.project-search input {
  width: 100%;
  padding: 12px 40px 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 25px;
  background: var(--primary-bg);
  color: var(--text-primary);
  font-size: 1rem;
}

.project-search i {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--primary-bg);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-medium);
}

.project-image {
  height: 200px;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  position: relative;
  overflow: hidden;
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
  background: rgba(0, 0, 0, 0.8);
}

.project-link {
  color: white;
  font-size: 2rem;
  text-decoration: none;
  transition: var(--transition);
}

.project-link:hover {
  transform: scale(1.2);
}

.project-content {
  padding: 2rem;
}

.project-content h3 {
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.project-content p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  background: var(--accent-color);
  color: white;
  padding: 4px 8px;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: var(--transition);
}

.tech-tag:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* Blog Section */
.blog {
  padding-top: 180px;
  padding-bottom: 100px;
  scroll-margin-top: 120px;
  position: relative;
  z-index: 1;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.blog-loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
}

.blog-loading i {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.blog-card {
  background: var(--secondary-bg);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

.blog-cta {
  text-align: center;
}

/* Testimonials Section */
.testimonials {
  padding-top: 180px;
  padding-bottom: 100px;
  background: var(--secondary-bg);
  scroll-margin-top: 120px;
  position: relative;
  z-index: 1;
}

.testimonials-carousel {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.testimonial-track {
  overflow: hidden;
  border-radius: 15px;
}

.testimonial-slide {
  display: none;
  background: var(--primary-bg);
  padding: 3rem;
  text-align: center;
  box-shadow: var(--shadow-light);
}

.testimonial-slide.active {
  display: block;
}

.testimonial-text {
  margin-bottom: 2rem;
}

.testimonial-text i {
  color: var(--accent-color);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.testimonial-text p {
  font-size: 1.1rem;
  line-height: 1.7;
  font-style: italic;
}

.author-info h4 {
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.author-info p {
  color: var(--text-secondary);
}

.testimonial-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin-top: 2rem;
}

.testimonial-btn {
  background: var(--accent-color);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
}

.testimonial-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.1);
}

.testimonial-dots {
  display: flex;
  gap: 0.5rem;
}

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

.dot.active {
  background: var(--accent-color);
}

/* Contact Section */
.contact {
  padding-top: 180px;
  padding-bottom: 100px;
  scroll-margin-top: 120px;
  position: relative;
  z-index: 1;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--accent-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.contact-details h3 {
  margin-bottom: 0.5rem;
  color: var(--accent-color);
}

.contact-details a {
  color: var(--text-primary);
  text-decoration: none;
}

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

.contact-social {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.contact-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--secondary-bg);
  color: var(--text-primary);
  border-radius: 50%;
  text-decoration: none;
  transition: var(--transition);
}

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

.contact-form {
  background: var(--secondary-bg);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: var(--shadow-light);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--primary-bg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: var(--primary-bg);
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand h3 {
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.footer-cta {
  margin-top: 1rem;
  font-style: italic;
  color: var(--primary-bg);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--primary-bg);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-color);
}

.footer-contact p {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-contact a {
  color: var(--primary-bg);
  text-decoration: none;
}

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

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 35px;
  height: 35px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--primary-bg);
  border-radius: 50%;
  text-decoration: none;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--accent-color);
  color: white;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal {
  display: flex;
  gap: 2rem;
}

.footer-legal a {
  color: var(--primary-bg);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-legal a:hover {
  color: var(--accent-color);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: var(--primary-bg);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-medium);
    padding: 2rem 0;
  }

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

  .hamburger {
    display: flex;
  }

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

  .hamburger.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

  .project-links {
    display: flex;
    justify-content: center;
  }

  .project-links a {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
  }

  .project-links a:hover {
    background-color: #555;
  }

  .project-links a i {
    margin-right: 10px;
  }

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

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .nav-container {
    padding: 1rem;
  }

  .container {
    padding: 0 15px;
  }

  .hero-social {
    gap: 0.5rem;
  }

  .hero-social a {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}