:root {
  --bg-light: #f4f4f4;
  --text-light: #222;
  --bg-dark: #1b1b1b;
  --text-dark: #f4f4f4;
  --accent: #0077ff;
  /* border color for light theme */
  --border-color: #0e0e0e; /* subtle blue tint */
}

body.dark {
  --border-color: #fafafa; /* brighter border for dark mode */
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-light);
  color: var(--text-light);
  transition: background-color 0.3s, color 0.3s;
}

body.dark {
  background-color: var(--bg-dark);
  color: var(--text-dark);
}

.container {
  display: flex;
  flex-wrap: wrap;
  max-width: 900px;
  margin: 5vh auto;
  padding: 20px 40px;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

.left,
.right {
  padding: 20px;
  flex: 1 1 300px;
}

.profile-pic {
  width: 250px;
  height: 350px;
  /* border-radius: 12px; */
  object-fit: cover;
  /* box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2); */
  border: 2px solid var(--border-color);
  transition: border-color 0.3s, box-shadow 0.3s;
}

h1 {
  font-size: 2.3em;
  margin-bottom: 0.4em;
}

.bio {
  line-height: 1.6;
  max-width: 500px;
}

.social-links {
  margin-top: 20px;
}

.social-links a {
  margin-right: 15px;
  display: inline-block;
  transition: transform 0.2s, opacity 0.2s;
}

.social-links a:hover {
  transform: scale(1.15);
  opacity: 0.8;
}

.social-links img {
  width: 32px;
  height: 32px;
  filter: invert(0);
}

body.dark .social-links img {
  filter: invert(1);
}

/* Theme toggle button */
#theme-toggle {
  margin-top: 30px;
  border: none;
  background: none;
  font-size: 1.5em;
  cursor: pointer;
  transition: transform 0.2s;
}

#theme-toggle:hover {
  transform: rotate(20deg);
}

.highlight-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}

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


/* Responsive design */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
    text-align: center;
  }

  .profile-pic {
    width: 200px;
    height: 300px;
  }

  .bio {
    margin: 0 auto;
  }
}