/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-color: #0d1117;
  --text-color: #c9d1d9;
  --header-bg: #0d1117;
  --footer-bg: #0d1117;
  --heading-color: #f0f6fc;
  --subheading-color: #8b949e;
  --link-color: #58a6ff;
  --border-color: #21262d;
}

[data-theme="light"] {
  --bg-color: #ffffff;
  --text-color: #24292f;
  --header-bg: #ffffff;
  --footer-bg: #ffffff;
  --heading-color: #24292f;
  --subheading-color: #656d76;
  --link-color: #0969da;
  --border-color: #d0d7de;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.3s, color 0.3s;
  font-size: 16px;
}

/* Header */
.site-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

.site-nav {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--heading-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}

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

.nav-links a.active {
  color: var(--link-color);
  font-weight: 600;
}

.theme-toggle {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: 20px;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: scale(1.05);
}

.toggle-track {
  width: 50px;
  height: 26px;
  background: var(--toggle-track-bg);
  border-radius: 13px;
  position: relative;
  transition: all 0.3s ease;
  border: 2px solid var(--toggle-border);
}

.toggle-thumb {
  width: 22px;
  height: 22px;
  background: var(--toggle-thumb-bg);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-icon {
  font-size: 12px;
  line-height: 1;
}

/* Light mode positioning */
[data-theme="light"] .toggle-thumb {
  left: 24px;
}

/* Dark mode positioning */
[data-theme="dark"] .toggle-thumb {
  left: 2px;
}

/* Light theme variables */
[data-theme="light"] {
  --toggle-track-bg: linear-gradient(135deg, #e2e8f0, #cbd5e1);
  --toggle-thumb-bg: linear-gradient(135deg, #fbbf24, #f59e0b);
  --toggle-border: #cbd5e1;
  --focus-color: #3b82f6;
}

/* Dark theme variables */
[data-theme="dark"] {
  --toggle-track-bg: linear-gradient(135deg, #374151, #4b5563);
  --toggle-thumb-bg: linear-gradient(135deg, #6366f1, #8b5cf6);
  --toggle-border: #4b5563;
  --focus-color: #60a5fa;
}

.theme-toggle:focus {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

/* Main content */
.page-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 24px;
  min-height: calc(100vh - 140px);
}

/* Home page styles */
.home-content {
  max-width: 100%;
}

.profile-section {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.profile-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.profile-content {
  flex: 1;
}

.home-content h1 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--heading-color);
  line-height: 1.25;
}

.home-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2rem 0 1rem 0;
  color: var(--heading-color);
}

.home-content p {
  margin-bottom: 1.5rem;
  font-size: 1rem;
  color: var(--text-color);
  line-height: 1.6;
}

.home-content a {
  color: var(--link-color);
  text-decoration: none;
  font-weight: 500;
}

.home-content a:hover {
  text-decoration: underline;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--link-color);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s;
}

.social-link:hover {
  opacity: 0.8;
  text-decoration: none;
}

.social-link svg {
  flex-shrink: 0;
}

.home-content ul {
  margin: 1rem 0 1rem 1.5rem;
}

.home-content li {
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

/* Footer */
.site-footer {
  background: var(--footer-bg);
  border-top: 1px solid var(--border-color);
  color: var(--subheading-color);
  text-align: center;
  padding: 1.5rem 0;
  margin-top: auto;
  font-size: 0.875rem;
}

/* Responsive design */
@media (max-width: 768px) {
  .site-nav {
    padding: 0 16px;
  }
  
  .page-content {
    padding: 2rem 16px;
  }
  
  .home-content h1 {
    font-size: 1.75rem;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .profile-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
  }
  
  .profile-image {
    width: 100px;
    height: 100px;
  }
  
  .social-links {
    justify-content: center;
    gap: 1rem;
  }
}