:root {
  --primary-color: #3b82f6;
  --secondary-color: #6366f1;
  --accent-color: #8b5cf6;
  --background-color: #0f0f23;
  --surface-color: #0f0f23;
  --card-color: #1a1a2e;
  --text-primary: #ffffff;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.4);
  --gradient-bg: linear-gradient(135deg, #0f0f23 0%, #0f0f23 100%);
  --gradient-card: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--gradient-bg);
  min-height: 100vh;
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo h3 {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-img {
  height: 42px;
  width: auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.logo-img:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

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

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

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

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

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--background-color) 0%, var(--surface-color) 100%);
  padding-top: 5rem;
}

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

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  justify-content: center;
}

.avatar {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--background-color);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
}

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

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

/* Sections */
.section {
  padding: 5rem 0;
}

.bg-light {
  background: var(--surface-color);
}

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

/* About Section */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

.project-card {
  background: var(--background-color);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
}

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

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

.project-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--accent-color);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
  flex-grow: 1;
}

/* Markdown support within project descriptions */
.project-description p {
  margin-bottom: 0.8rem;
}

.project-description p:last-child {
  margin-bottom: 0;
}

.project-description ul, .project-description ol {
  margin: 0.8rem 0;
  padding-left: 1.5rem;
}

.project-description li {
  margin-bottom: 0.4rem;
}

.project-description strong {
  color: var(--text-primary);
  font-weight: 600;
}

.project-description em {
  color: var(--primary-color);
  font-style: italic;
}

.project-description code {
  background: var(--surface-color);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--primary-color);
}

.project-description blockquote {
  border-left: 3px solid var(--primary-color);
  margin: 1rem 0;
  padding: 0.5rem 0 0.5rem 1rem;
  background: var(--surface-color);
  border-radius: 0 0.25rem 0.25rem 0;
}

.project-description a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.project-description a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

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

.project-footer {
  margin-top: auto;
}

.tech-tag {
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

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

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

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

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.skill-item {
  background: var(--background-color);
  padding: 1.5rem;
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.skill-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px -5px rgb(0 0 0 / 0.15);
}

.skill-header {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.skill-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-color);
  border-radius: 0.5rem;
  flex-shrink: 0;
}

.skill-icon-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.skill-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.skill-name {
  font-weight: 600;
  color: var(--accent-color);
  font-size: 1.1rem;
}

.skill-category {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Contact Section */
.contact-content {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-item {
  margin-bottom: 1.2rem;
}

.contact-item h4 {
  color: var(--accent-color);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

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

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

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

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 0.5rem;
  font-weight: 500;
  transition: var(--transition);
  text-transform: capitalize;
}

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

.social-icon {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1); /* Make SVGs white */
}

/* Footer */
.footer {
  background: var(--background-color);
  color: var(--text-secondary);
  text-align: center;
  padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 2rem;
    transition: left 0.3s ease;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-link {
    padding: 1rem 0;
    font-size: 1.2rem;
    width: 100%;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
  }
  
  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .container {
    padding: 0 1rem;
  }
  
  .section {
    padding: 3rem 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .avatar {
    width: 200px;
    height: 200px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .nav-container {
    padding: 1rem;
  }
}

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

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

/* Loading animation */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}