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

:root {
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --text-secondary: #666666;
  --border-color: #e5e5e5;
  --accent-color: #0066cc;
  --hover-bg: #f7f7f7;
  --sidebar-width: 260px;
  --rightbar-width: 240px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  padding: 48px 32px;
  border-right: 1px solid var(--border-color);
  background: var(--bg-color);
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  margin-bottom: 32px;
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: 16px;
  object-fit: cover;
  display: block;
}

.sidebar-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}

.sidebar-title {
  font-size: 13px;
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 32px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 0;
  transition: color 0.2s;
}

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

.sidebar-footer {
  margin-top: 48px;
}

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

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

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

.social-links svg {
  width: 18px;
  height: 18px;
}

.main {
  margin-left: var(--sidebar-width);
  margin-right: var(--rightbar-width);
  padding: 64px 60px;
  min-height: 100vh;
}

.section {
  margin-bottom: 64px;
}

.section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.hero-description {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-color);
  margin-bottom: 16px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.skill-group-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-color);
}

.skill-list {
  list-style: none;
}

.skill-list li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 3px 0;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.timeline-item {
  display: flex;
  gap: 24px;
}

.timeline-date {
  font-size: 12px;
  color: var(--text-secondary);
  width: 120px;
  flex-shrink: 0;
}

.timeline-content {
  flex: 1;
}

.timeline-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}

.timeline-company {
  font-size: 13px;
  color: var(--accent-color);
  margin-bottom: 6px;
}

.timeline-description {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.cert-card {
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  text-align: center;
}

.cert-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
}

.cert-company {
  font-size: 12px;
  color: var(--text-secondary);
}

.blog-list {
  display: flex;
  flex-direction: column;
}

.blog-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  text-decoration: none;
  transition: opacity 0.2s;
}

.blog-item:last-child {
  border-bottom: none;
}

.blog-item:hover {
  opacity: 0.7;
}

.blog-date {
  font-size: 12px;
  color: var(--text-secondary);
  flex-shrink: 0;
  width: 60px;
}

.blog-title {
  font-size: 14px;
  color: var(--text-color);
}

.blog-all {
  margin-top: 12px;
  color: var(--accent-color);
  font-size: 13px;
  font-weight: 500;
}

.archive-year {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-color);
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.rightbar {
  position: fixed;
  right: 0;
  top: 0;
  width: var(--rightbar-width);
  height: 100vh;
  padding: 48px 24px;
  border-left: 1px solid var(--border-color);
  background: var(--bg-color);
  z-index: 100;
  overflow-y: auto;
}

.rightbar-section {
  margin-bottom: 32px;
}

.rightbar-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.update-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.update-item:last-child {
  border-bottom: none;
}

.update-item:hover {
  opacity: 0.7;
}

.update-date {
  font-size: 11px;
  color: var(--text-secondary);
}

.update-text {
  font-size: 12px;
  color: var(--text-color);
  line-height: 1.4;
}

@media (max-width: 900px) {
  .sidebar {
    position: relative;
    width: 100%;
    height: auto;
    padding: 24px 32px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .sidebar-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 0;
  }

  .avatar {
    width: 50px;
    height: 50px;
    margin-bottom: 0;
  }

  .sidebar-title {
    margin-bottom: 0;
    font-size: 12px;
  }

  .nav-links {
    flex-direction: row;
    gap: 20px;
    margin-top: 0;
    flex-wrap: wrap;
  }

  .sidebar-footer {
    display: none;
  }

  .rightbar {
    display: none;
  }

  .main {
    margin-left: 0;
    margin-right: 0;
    padding: 40px 32px;
  }

  .skills-grid,
  .cert-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .timeline-item {
    flex-direction: column;
    gap: 8px;
  }

  .timeline-date {
    width: auto;
  }
}

@media (max-width: 600px) {
  .sidebar {
    padding: 16px 20px;
  }

  .sidebar-name {
    font-size: 18px;
  }

  .nav-links {
    gap: 12px;
  }

  .nav-link {
    font-size: 13px;
  }

  .main {
    padding: 24px 20px;
  }

  .section-title {
    font-size: 10px;
  }

  .skills-grid,
  .cert-grid {
    grid-template-columns: 1fr;
  }

  .blog-list {
    gap: 0;
  }

  .blog-item {
    flex-direction: column;
    gap: 4px;
    padding: 10px 0;
  }

  .blog-date {
    width: auto;
    font-size: 11px;
  }

  .blog-title {
    font-size: 13px;
  }

  .timeline-title {
    font-size: 14px;
  }

  .timeline-description {
    font-size: 12px;
  }

  .post-content {
    font-size: 15px;
  }

  .post-title {
    font-size: 24px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0a0a0a;
    --text-color: #e5e5e5;
    --text-secondary: #888888;
    --border-color: #2a2a2a;
    --accent-color: #66b3ff;
    --hover-bg: #141414;
  }
}

.post-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.post-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-color);
}

.post-content h1,
.post-content h2,
.post-content h3 {
  margin-top: 32px;
  margin-bottom: 16px;
  font-weight: 600;
}

.post-content h1 { font-size: 24px; }
.post-content h2 { font-size: 20px; }
.post-content h3 { font-size: 18px; }

.post-content p {
  margin-bottom: 16px;
}

.post-content ul,
.post-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.post-content li {
  margin-bottom: 8px;
}

.post-content blockquote {
  border-left: 3px solid var(--border-color);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-secondary);
}

.post-content code {
  background: var(--hover-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}

.post-content pre {
  background: var(--hover-bg);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 16px;
}

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

.blog-date {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}