:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --accent-color: #3b82f6;
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  overflow-x: hidden;
}

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

/* Navigation */
.navbar {
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
}

.nav-link {
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: #e5e7eb !important;
}

.nav-link::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  background-color: #e5e7eb;
  transition: all 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
  left: 0;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  position: relative;
  overflow: hidden;
}

.hero-section::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 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
  animation: fadeInUp 1s ease-out;
}

.hero-buttons .btn {
  padding: 12px 30px;
  font-weight: 600;
  border-radius: 50px;
  transition: all 0.3s ease;
  text-decoration: none;
}

.hero-buttons .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Section Styling */
.section-header {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  margin: 0 auto;
  border-radius: 2px;
}

/* About Section */
.about-content {
  font-size: 1.1rem;
}

.info-item {
  padding: 10px 0;
  font-size: 1rem;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-color);
}

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

.timeline-marker {
  position: absolute;
  left: -37px;
  top: 20px;
  width: 12px;
  height: 12px;
  background: var(--primary-color);
  border: 3px solid var(--white);
  border-radius: 50%;
  box-shadow: var(--shadow);
}

.timeline-content {
  margin-left: 20px;
}

.timeline-item .card {
  transition: all 0.3s ease;
}

.timeline-item .card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* Skills Section */
.skill-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  height: 100%;
  border: 1px solid #e5e7eb;
}

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

.skill-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--white);
  font-size: 1.5rem;
}

.skill-card h5 {
  color: var(--text-dark);
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Tech Stack */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-badge {
  background: var(--primary-color);
  color: var(--white);
  padding: 8px 16px;
  border-radius: 25px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.tech-badge:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
}

/* Projects Section */
.project-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  height: 100%;
  border: 1px solid #e5e7eb;
}

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

.project-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--white);
  font-size: 2rem;
}

.project-title {
  color: var(--text-dark);
  font-weight: 600;
  margin-bottom: 1rem;
}

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

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

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

/* Contact Section */
.contact-item {
  padding: 2rem;
}

.contact-icon {
  opacity: 0.9;
}

.contact-item h5 {
  margin-bottom: 1rem;
  font-weight: 600;
}

.contact-item a:hover {
  opacity: 0.8;
}

/* Education Section */
.education-icon {
  opacity: 0.8;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .section-title {
    font-size: 2rem;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .hero-content h2 {
    font-size: 1.5rem;
  }

  .timeline {
    padding-left: 20px;
  }

  .timeline-marker {
    left: -27px;
  }

  .timeline-content {
    margin-left: 10px;
  }

  .skill-card,
  .project-card {
    padding: 1.5rem;
  }

  .hero-buttons .btn {
    display: block;
    width: 100%;
    margin-bottom: 10px;
  }

  .tech-stack {
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .hero-content h1 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .skill-card,
  .project-card {
    padding: 1rem;
  }
}

/* Utility Classes */
.bg-primary {
  background-color: var(--primary-color) !important;
}

.text-primary {
  color: var(--primary-color) !important;
}

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

.btn-primary:hover {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
}

.badge.bg-primary {
  background-color: var(--primary-color) !important;
}