:root {
  --bg: #fff; --fg: #333; --primary: #3b82f6;
  --nav-bg: #f5f5f5; --sidebar-bg: #fafafa;
  --radius: 8px; --gap: 1rem; --font: 'Inter', sans-serif;
}
html.dark {
  --bg: #121212; --fg: #e0e0e0; --nav-bg: #1f1f1f; --sidebar-bg: #1a1a1a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}
header { background: var(--nav-bg); box-shadow: 0 2px 4px rgba(0,0,0,0.05); }
nav {
  max-width: 960px; margin: auto; display: flex; align-items: center; padding: var(--gap);
}
nav .logo { font-weight: 600; margin-right: auto; text-decoration: none; color: var(--fg); }
nav ul { list-style: none; display: flex; gap: var(--gap); }
nav a { text-decoration: none; color: var(--fg); font-weight: 500; }
nav a:hover { color: var(--primary); }
button#theme-toggle { background: none; border: none; cursor: pointer; font-size: 1.4rem; margin-left: auto; line-height: 1; padding: 0.25rem; }

.container { max-width: 960px; margin: var(--gap) auto; padding: 0 var(--gap); }
footer { text-align: center; padding: var(--gap); border-top: 1px solid rgba(0,0,0,0.1); font-size: 0.9rem; }

.hero {
  background: var(--sidebar-bg);
  padding: calc(var(--gap)*2);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}
.hero h1 { font-size: 2rem; margin-bottom: var(--gap); }
.hero p { margin-bottom: var(--gap); }
.btn {
  display: inline-block; padding: 0.6rem 1.2rem;
  background: var(--primary); color: #fff; text-decoration: none; border-radius: var(--radius);
}
.btn:hover { background: #2563eb; }

/* Two-column pages */
.page-wrap { display: flex; gap: var(--gap); margin-top: var(--gap); }
.sidebar {
  flex: 0 0 260px; background: var(--sidebar-bg); padding: var(--gap); border-radius: var(--radius);
}
.profile-card { text-align: center; }
.profile-pic {
  width: 140px; height: 140px; object-fit: cover; border-radius: 50%;
  border: 3px solid var(--primary); margin-bottom: var(--gap);
}
.profile-card h2 { margin-bottom: 0.25rem; }
.profile-card .role { font-style: italic; margin-bottom: var(--gap); }
.profile-card .social img { width: 16px; height: 16px; display: inline-block; }
.profile-card .social { list-style: none; display: flex; justify-content: center; gap: 0.5rem; margin-bottom: var(--gap); }
.profile-card .social a { font-size: 1.2rem; color: var(--fg); }
.profile-card .download-btn {
  display: block; text-decoration: none; background: var(--primary);
  color: #fff; padding: 0.5rem; border-radius: var(--radius);
}
.profile-card .download-btn:hover { background: #2563eb; }

.main-content { flex: 1; }
.main-content h2 { margin-top: var(--gap); margin-bottom: 0.5rem; }
.main-content h3 { margin-top: var(--gap); }
.main-content p, .main-content li { margin-bottom: 0.5rem; }
.main-content ul { padding-left: 1.2rem; }

/*projects: grid of project cards */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
  margin-bottom: var(--gap);
}

.project-card {
  background: var(--sidebar-bg);
  padding: var(--gap);
  border-radius: var(--radius);
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}

.project-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.project-card p {
  margin-bottom: 0.5rem;
}

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

.project-card a:hover {
  text-decoration: underline;
}

/* Skills list */
.skills-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--gap);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.skills-list li {
  background: var(--sidebar-bg);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.education-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--gap);
  padding-bottom: var(--gap);
  border-bottom: 1px solid rgba(0,0,0,0.1);
}

/* Left column */
.edu-details {
  max-width: 70%;
}
.edu-details .degree {
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.edu-details .institution,
.edu-details .advisor {
  margin: 0.25rem 0;
  font-style: italic;
  color: var(--fg);
}

/* Right column: date + logo */
.edu-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.edu-date {
  font-weight: 500;
  color: var(--fg);
}
.edu-logo {
  width: 175px;
  height: auto;
  object-fit: contain;
}


/* ===== Mobile responsiveness ===== */
@media (max-width: 768px) {
  /* Stack the page wrap vertically */
  .page-wrap {
    display: flex;
    flex-direction: column;
  }

  /* Ensure main content comes first */
  .main-content {
    order: 1;
    width: 100%;
    padding: 0; /* adjust if you had side padding */
  }

  /* Sidebar below, full-width */
  .sidebar {
    order: 2;
    width: 100%;
    margin: var(--gap) 0; /* space between content and sidebar */
    padding: var(--gap);
  }

  /* Optionally shrink profile pic a bit on mobile */
  .profile-pic {
    width: 100px;
    height: 100px;
  }
}