:root {
  --bg: #ffffff;
  --text: #222222;
  --muted: #666666;
  --accent: #0056b3;
  --border: #e5e5e5;
  --card-bg: #f9f9f9;
  --max-width: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #e0e0e0;
    --muted: #a0a0a0;
    --accent: #64b5f6;
    --border: #2a2a2a;
    --card-bg: #1e1e1e;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
}

header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}

h1 {
  font-size: 2.2rem;
  margin: 0 0 0.2rem 0;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  margin: 0 0 1.2rem 0;
}

nav {
  display: flex;
  gap: 1.2rem;
}

nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  padding-bottom: 0.2rem;
}

nav a:hover {
  color: var(--accent);
}

nav a.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}

section {
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

ul {
  padding-left: 1.2rem;
}

li {
  margin-bottom: 0.5rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.2rem;
  margin-bottom: 1.2rem;
}

.card-title {
  font-weight: 600;
  font-size: 1.1rem;
}

.card-meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.25rem 0 0.5rem 0;
}

.tag {
  display: inline-block;
  background: var(--border);
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
}

.btn {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-decoration: none;
  margin-top: 0.5rem;
  margin-right: 0.4rem;
}

.btn:hover {
  background: var(--accent);
  color: #fff;
}

footer {
  margin-top: 4rem;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

/* Profile Layout */
.profile-container {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.profile-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.profile-text {
  flex-grow: 1;
}

/* Links & Social Badges */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text);
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  transition: border-color 0.2s, color 0.2s;
}

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

.social-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  display: inline-block;
  object-fit: contain;
}

.social-link i.social-icon {
  font-size: 16px;
  line-height: 1;
}