/* CSS Variables */
:root {
  --primary-color: #1E1E2F;
  --secondary-color: #4ECCA3;
  --accent-color: #FF6B6B;
  --background-color: #F9F9F9;
  --text-color: #333333;
  --light-text: #666666;
  --white: #FFFFFF;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease-in-out;
  --hero-text: #FFFFFF;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --primary-color: #F9F9F9;
  --secondary-color: #4ECCA3;
  --accent-color: #FF6B6B;
  --background-color: #1E1E2F;
  --text-color: #F9F9F9;
  --light-text: #CCCCCC;
  --white: #1E1E2F;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --hero-text: #1E1E2F;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --primary-color: #F9F9F9;
  --secondary-color: #4ECCA3;
  --accent-color: #FF6B6B;
  --background-color: #1E1E2F;
  --text-color: #F9F9F9;
  --light-text: #CCCCCC;
  --white: #1E1E2F;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

/* Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
}

p {
  font-size: 1rem;
  color: var(--light-text);
}

a {
  text-decoration: none;
  color: var(--text-color);
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: var(--transition);
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary-color);
}

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

.nav-menu li {
  margin-left: 2rem;
}

.nav-menu a {
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--secondary-color);
  transition: var(--transition);
}

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

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

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

#dark-mode-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-color);
  margin-left: 1rem;
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--hero-text);
}

.hero-content {
  z-index: 2;
  max-width: 600px;
}

.hero h1 {
  margin-bottom: 1rem;
  animation: fadeInUp 1s ease-out;
}

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

.tagline {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  animation: typing 3s steps(30, end), blink-caret 0.75s step-end infinite;
  border-right: 2px solid var(--accent-color);
  white-space: nowrap;
  overflow: hidden;
}

.hero-description {
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease-out 0.5s both;
  font-size: 1.2rem;
  line-height: 1.8;
  color: var(--hero-text);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--white);
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
  animation: fadeInUp 1s ease-out 1s both;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(255, 107, 107, 0.3);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('https://images.unsplash.com/photo-1517077304055-6e89abbf09b0?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  opacity: 0.1;
  z-index: 1;
}

/* About Section */
.about {
  padding: 5rem 0;
  background-color: var(--background-color);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: center;
}

.about-image img {
  width: 100%;
  max-width: 300px;
  border-radius: 50%;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.about-image img:hover {
  transform: scale(1.05);
}

.about-text p {
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.detail-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.social-links a {
  font-size: 1.5rem;
  color: var(--text-color);
  transition: var(--transition);
}

.social-links a:hover {
  color: var(--secondary-color);
  transform: translateY(-3px);
}

/* Services Section */
.services {
  padding: 5rem 0;
  background-color: var(--white);
}

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

.service-card {
  text-align: center;
  padding: 2rem;
  background-color: var(--background-color);
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.service-icon {
  font-size: 3rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.service-card h3 {
  margin-bottom: 1rem;
}

/* Projects Section */
.projects {
  padding: 5rem 0;
  background-color: var(--background-color);
}

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

.project-card {
  background-color: var(--white);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.project-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.project-content {
  padding: 1.5rem;
}

.project-content h3 {
  margin-bottom: 0.5rem;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.tech-stack span {
  background-color: var(--secondary-color);
  color: var(--white);
  padding: 0.25rem 0.5rem;
  border-radius: 20px;
  font-size: 0.8rem;
}

.project-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--secondary-color);
  font-weight: 600;
}

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

/* Contact Section */
.contact {
  padding: 5rem 0;
  background-color: var(--white);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-form {
  background-color: var(--background-color);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 2px rgba(78, 204, 163, 0.2);
}

.submit-button {
  background-color: var(--secondary-color);
  color: var(--white);
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.submit-button:hover {
  background-color: var(--accent-color);
  transform: translateY(-2px);
}

.contact-info h3 {
  margin-bottom: 1rem;
}

.contact-info p {
  margin-bottom: 2rem;
}

/* Footer */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

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

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

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

#back-to-top {
  background-color: var(--secondary-color);
  color: var(--white);
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

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

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent-color); }
}

/* Scroll Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--white);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 2rem 0;
  }

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

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

  .nav-toggle {
    display: flex;
  }

  .hero {
    height: 90vh;
    padding: 1rem;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .tagline {
    font-size: 1.3rem;
  }

  .about {
    padding: 3rem 0;
  }

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

  .services {
    padding: 3rem 0;
  }

  .projects {
    padding: 3rem 0;
  }

  .contact {
    padding: 3rem 0;
  }

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

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
}

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

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  .hero {
    height: 85vh;
    padding: 1rem 0.5rem;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .tagline {
    font-size: 1.1rem;
  }

  .hero-description {
    font-size: 0.9rem;
  }

  .cta-button {
    padding: 0.8rem 1.5rem;
    font-size: 0.9rem;
  }

  .about-image img {
    max-width: 250px;
  }

  .service-card {
    padding: 1.5rem;
  }

  .service-icon {
    font-size: 2.5rem;
  }

  .project-card img {
    height: 180px;
  }

  .services-grid,
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer {
    padding: 1.5rem 0;
  }
}