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

:root {
  --primary: #0066ff;
  --primary-dark: #0052cc;
  --secondary: #64748b;
  --background: #ffffff;
  --surface: #f8fafc;
  --text: #0f172a;
  --text-secondary: #475569;
  --border: #e2e8f0;
  --accent: #06b6d4;
  --shadow: rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: var(--background);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}

.nav-logo svg {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 65px;
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 0;
}

/* Hero Section */
.hero {
  padding: 160px 0 80px;
  text-align: center;
  background: linear-gradient(to bottom, var(--surface), var(--background));
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.2;
  color: var(--text);
}

.hero-description {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-size: 16px;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface);
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--surface);
}

.section-title {
  font-size: 40px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 18px;
  margin-bottom: 48px;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text h3 {
  font-size: 24px;
  margin-bottom: 16px;
  color: var(--text);
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.stat-card {
  background: white;
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: flex;
  gap: 16px;
  align-items: center;
}

.stat-icon {
  width: 48px;
  height: 48px;
  background: var(--surface);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.skill-category {
  background: white;
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.skill-category-header svg {
  color: var(--primary);
}

.skill-category-header h3 {
  font-size: 20px;
  font-weight: 600;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-secondary);
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  background: white;
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px var(--shadow);
}

.project-icon {
  width: 56px;
  height: 56px;
  background: var(--surface);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
}

.project-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--text);
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.project-tags span {
  padding: 4px 12px;
  background: var(--surface);
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

.project-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.project-link:hover {
  text-decoration: underline;
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-card {
  background: white;
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: flex;
  gap: 16px;
  align-items: center;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--surface);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-card h3 {
  font-size: 16px;
  margin-bottom: 4px;
  color: var(--text);
}

.contact-card a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
}

.contact-card a:hover {
  color: var(--primary);
}

.contact-cta {
  background: white;
  padding: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-cta h3 {
  font-size: 24px;
  margin-bottom: 16px;
}

.contact-cta p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* Footer */
.footer {
  background: var(--text);
  color: white;
  padding: 40px 0;
}

.footer-content {
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 18px;
  margin-bottom: 16px;
}

.footer p {
  color: var(--secondary);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-description {
    font-size: 18px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 32px;
  }

  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

@media (min-width: 769px) and (max-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}