:root {
  --primary-color: #0066cc;
  --secondary-color: #00d4aa;
  --accent-color: #ff6b35;
  --dark-color: #1a1a1a;
  --light-color: #f8f9fa;
  --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --text-light: #6c757d;
}

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

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: #333;
  overflow-x: hidden;
}

.code-font {
  font-family: "JetBrains Mono", monospace;
}

/* Navbar Styles */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.navbar-brand {
  font-weight: 700;
  color: var(--primary-color) !important;
  font-size: 1.5rem;
}

.nav-link {
  font-weight: 500;
  color: var(--dark-color) !important;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--primary-color) !important;
}

.nav-link.active {
  color: var(--primary-color) !important;
}

.nav-link::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  background-color: var(--primary-color);
  transition: all 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
  left: 10%;
}

/* Hero Section */
.hero {
  background: var(--gradient-bg);
  color: white;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero .lead {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.typing-text {
  color: var(--secondary-color);
  font-weight: 600;
}

.btn-custom {
  background: var(--secondary-color);
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

.btn-custom:hover {
  background: #00b894;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 212, 170, 0.3);
}

.stats {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 2rem;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
  color: white;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  display: block;
}

/* Section Styles */
section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--dark-color);
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 4rem;
}

/* About Section */
.about-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  height: 100%;
  transition: all 0.3s ease;
}

.about-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.about-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-bg);
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

/* Services Section */
.service-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  height: 100%;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-bg);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  margin: 0 auto 1.5rem;
}

/* Tech Stack */
.tech-stack {
  background: var(--light-color);
}

.tech-item {
  background: white;
  border-radius: 10px;
  padding: 1.5rem;
  text-align: center;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.tech-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.tech-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* Portfolio */
.portfolio-item {
  background: white;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.portfolio-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.portfolio-content {
  padding: 2rem;
}

.portfolio-tag {
  background: var(--secondary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Contact Section */
.contact {
  background: var(--dark-color);
  color: white;
}

.contact .section-title {
  color: white;
}

.contact-info {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  padding: 2rem;
  backdrop-filter: blur(10px);
}

.contact-item {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--secondary-color);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  margin-right: 1rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.social-link {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
}

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

/* Footer */
footer {
  background: #111;
  color: white;
  text-align: center;
  padding: 2rem 0;
}

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

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

  .stat-number {
    font-size: 2rem;
  }
}

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

/* Loading animation for typing effect */
.typing-cursor::after {
  content: "|";
  animation: blink 1s infinite;
}

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

/* Portfolio-specific styles */
.portfolio-hero {
  background: var(--gradient-bg);
  color: white;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.portfolio-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.portfolio-hero .container {
  position: relative;
  z-index: 2;
}

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

.filter-btn {
  background: white;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 10px 25px;
  border-radius: 25px;
  font-weight: 600;
  transition: all 0.3s ease;
  cursor: pointer;
}

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

.project-card {
  background: white;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: all 0.4s ease;
  margin-bottom: 2rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.project-image {
  height: 280px;
  background: var(--gradient-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-image::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.8),
    rgba(118, 75, 162, 0.8)
  );
  z-index: 1;
}

.project-image i {
  font-size: 4rem;
  color: white;
  z-index: 2;
  position: relative;
}

.project-content {
  padding: 2rem;
}

.project-meta {
  display: flex;
  justify-content: between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.project-category {
  background: var(--secondary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
}

.project-year {
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.9rem;
}

.project-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 1rem;
}

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

.project-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.project-stat {
  text-align: center;
}

.project-stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  display: block;
}

.project-stat-label {
  font-size: 0.8rem;
  color: var(--text-light);
  text-transform: uppercase;
  font-weight: 500;
}

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

.tech-badge {
  background: var(--light-color);
  color: var(--dark-color);
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.project-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.project-link {
  background: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

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

.project-link.secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.project-link.secondary:hover {
  background: var(--primary-color);
  color: white;
}

.case-study-section {
  background: var(--light-color);
  margin-top: 2rem;
  padding: 2rem;
  border-radius: 15px;
}

.challenge-solution {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

.challenge,
.solution {
  background: white;
  padding: 1.5rem;
  border-radius: 10px;
  border-left: 4px solid var(--accent-color);
}

.solution {
  border-left-color: var(--secondary-color);
}

.testimonial {
  background: white;
  padding: 2rem;
  border-radius: 15px;
  margin: 2rem 0;
  border-left: 4px solid var(--secondary-color);
  font-style: italic;
}

.testimonial-author {
  margin-top: 1rem;
  font-weight: 600;
  color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
  .challenge-solution {
    grid-template-columns: 1fr;
  }

  .project-stats {
    justify-content: center;
  }

  .filter-tabs {
    justify-content: center;
  }
}

/* Animation for filtering */
.project-card.hidden {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.4s ease;
}

.project-card.visible {
  opacity: 1;
  transform: scale(1);
  transition: all 0.4s ease;
}