:root {
  --bg-main: #fafafa;
  --bg-sidebar: #ffffff;
  --text-primary: #111111;
  --text-secondary: #555555;
  --text-muted: #888888;
  --border-color: #eaeaea;
  --sidebar-width: 280px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 60px 40px;
  position: fixed;
  height: 100vh;
  display: flex; flex-direction: column;
}

.content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 80px 100px;
}

@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    padding: 30px 20px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .content {
    margin-left: 0;
    padding: 40px 20px;
  }
}

.branding a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav {
  margin-top: 50px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  font-weight: 500;
}

.social-links {
  display: flex;
  gap: 16px;
  margin-top: 40px;
}

.social-links a {
  color: var(--text-muted);
  transition: color 0.2s;
}

.social-links a:hover {
  color: var(--text-primary);
}

.posts {
  max-width: 650px;
}

.post-item {
  margin-bottom: 80px;
}

.post-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 8px;
}

.post-title {
  font-size: 1.8rem;
  margin-bottom: 16px;
  font-weight: 600;
}

.post-title a {
  text-decoration: none;
  color: var(--text-primary);
}

.post-excerpt {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 20px;
}

.read-more {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.contact-container {
  max-width: 500px;
}

.page-title {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.subtitle {
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input, .form-group textarea {
  padding: 12px;
  border: 1px solid var(--border-color);
  background: white;
  font-family: inherit;
  font-size: 1rem;
  border-radius: 4px;
}

.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--text-muted);
}

.submit-btn {
  background: var(--text-primary);
  color: white;
  border: none;
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity 0.2s;
  align-self: flex-start;
}

.submit-btn:hover {
  opacity: 0.9;
}

.post-content {
  max-width: 650px;
}

.post-header {
  margin-bottom: 40px;
}

.post-body {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.post-body p {
  margin-bottom: 24px;
}

code {
  font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  background-color: #eee;
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

pre {
  background-color: #111;
  color: #eee;
  padding: 1.5rem;
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: 24px;
}

pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  color: inherit;
}

.back-link {
  display: inline-block;
  margin-bottom: 40px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.back-link:hover {
  color: var(--text-primary);
}