* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
    Arial, sans-serif;
  line-height: 1.6;
  color: #e0e0e0;
  background-color: #1a1a1a;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: #0d1117;
  border-bottom: 1px solid #30363d;
  padding: 2rem 0;
  margin-bottom: 2rem;
}

header .logo img {
  border-radius: 50%;
  margin-bottom: 1rem;
}

header h1 {
  margin-bottom: 0.5rem;
}

header h1 a {
  color: #58a6ff;
  text-decoration: none;
}

header .tagline {
  color: #8b949e;
  margin-bottom: 1rem;
}

nav {
  margin-top: 1rem;
}

nav a {
  color: #58a6ff;
  text-decoration: none;
  margin-right: 1.5rem;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

/* Main content */
main {
  min-height: 60vh;
  padding: 2rem 0;
}

/* Posts list */
.post-list {
  list-style: none;
}

.post-item {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #30363d;
}

.post-item h2 {
  margin-bottom: 0.5rem;
}

.post-item h2 a {
  color: #58a6ff;
  text-decoration: none;
}

.post-item h2 a:hover {
  text-decoration: underline;
}

.post-item time {
  color: #8b949e;
  font-size: 0.9rem;
}

.post-item .excerpt {
  margin-top: 0.5rem;
  color: #c9d1d9;
}

/* Individual post */
.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #30363d;
}

.post-header h1 {
  color: #c9d1d9;
  margin-bottom: 0.5rem;
}

.post-header time {
  color: #8b949e;
  font-size: 0.9rem;
}

.tags {
  margin-top: 0.5rem;
}

.tag {
  display: inline-block;
  background: #0d1117;
  color: #58a6ff;
  padding: 0.25rem 0.75rem;
  border-radius: 3px;
  font-size: 0.85rem;
  margin-right: 0.5rem;
  margin-top: 0.5rem;
  border: 1px solid #30363d;
}

.post-content {
  color: #c9d1d9;
}

.post-content h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: #c9d1d9;
}

.post-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: #c9d1d9;
}

.post-content p {
  margin-bottom: 1rem;
}

.post-content code {
  background: #161b22;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
  color: #f0883e;
}

.post-content pre {
  background: #0d1117;
  border: 1px solid #30363d;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 1rem;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: #c9d1d9;
}

.post-content a {
  color: #58a6ff;
  text-decoration: none;
}

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

.post-content ul,
.post-content ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 1rem 0;
}

.post-nav {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #30363d;
}

.post-nav a {
  color: #58a6ff;
  text-decoration: none;
}

.post-nav a:hover {
  text-decoration: underline;
}

/* About page certifications */
.cert-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  margin: 2rem 0;
  justify-content: flex-start;
  align-items: flex-start;
}

.cert-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 280px;
}

.cert-card img {
  max-width: 200px;
  max-height: 200px;
  width: auto;
  height: auto;
  margin-bottom: 1rem;
  display: block;
}

.cert-name {
  font-weight: 600;
  font-size: 1rem;
  margin-top: 0.5rem;
  line-height: 1.4;
  color: #58a6ff;
}

.focus-areas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.focus-tag {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  background: #0d1117;
  color: #58a6ff;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid #30363d;
}

/* Footer */
footer {
  background: #0d1117;
  border-top: 1px solid #30363d;
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  color: #8b949e;
}

footer a {
  color: #58a6ff;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}