/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --text-color: #1f2937;
  --text-light: #6b7280;
  --bg-color: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --error-color: #ef4444;
}

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

/* Navigation */
.nav {
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

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

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

/* Container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* Typography */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-color);
}

h2 {
  font-size: 1.875rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-color);
}

p {
  margin-bottom: 1rem;
  color: var(--text-color);
}

strong {
  font-weight: 600;
  color: var(--text-color);
}

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

a:hover {
  text-decoration: underline;
}

/* Lists */
ul, ol {
  margin-bottom: 1rem;
  padding-left: 2rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Horizontal Rules */
hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 2rem 0 3rem;
}

.profile-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.5rem;
  border: 4px solid var(--border-color);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero .location {
  font-size: 1rem;
  color: var(--text-light);
  margin-top: 1rem;
  margin-bottom: 1.5rem;
}

.hero .location a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--primary-color);
}

.hero .location a:hover {
  border-bottom: 2px solid var(--primary-color);
}

.hero .location a::after {
  content: " ↗";
  font-size: 0.875rem;
  margin-left: 0.25rem;
}

.hero .intro {
  font-size: 1.125rem;
  color: var(--text-color);
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.highlight-tech {
  background-color: #dbeafe;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

.highlight-ai {
  background-color: #fef3c7;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

/* Two Column Lists */
.two-column-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 1.5rem 0 2.5rem;
}

.two-column-list ul {
  list-style: none;
  padding-left: 0;
}

.two-column-list li {
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
  color: var(--text-light);
}

.footer-container p {
  margin-bottom: 0.5rem;
}

.footer-container a {
  color: var(--text-light);
  text-decoration: none;
}

.footer-container a:hover {
  color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-menu {
    gap: 1rem;
  }

  .container {
    padding: 2rem 1rem;
  }

  h1 {
    font-size: 2rem;
  }

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

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .two-column-list {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}