:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #111111;
  --muted: #4b4b4b;
  --border: #e5e5e5;
  --panel: #fafafa;
  --accent: #111111;
  --link: #1f3cff;
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0c0c0c;
  --text: #f1f1f1;
  --muted: #b6b6b6;
  --border: #2b2b2b;
  --panel: #141414;
  --accent: #f1f1f1;
  --link: #8aa2ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 600;
  letter-spacing: 0.3px;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--panel);
}

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  padding: 32px 40px 64px;
}

.sidebar {
  position: sticky;
  top: 24px;
  align-self: start;
}

.avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 1px solid var(--border);
  object-fit: cover;
}

.name {
  margin-top: 20px;
  margin-bottom: 8px;
  font-size: 1.8rem;
}

.bio {
  color: var(--muted);
}

.socials {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.socials a {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.socials svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel {
  border: 1px solid var(--border);
  padding: 20px 24px;
  border-radius: 16px;
  background: var(--panel);
}

.panel h2 {
  margin-top: 0;
}

.link {
  color: var(--link);
  font-weight: 500;
}

.posts-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 24px 40px 64px;
}

.post-list {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  background: var(--panel);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.post-list a {
  padding: 8px 12px;
  border-radius: 10px;
  color: var(--text);
}

.post-list a.active {
  background: var(--bg);
  border: 1px solid var(--border);
}

.post-content {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 32px;
  background: var(--panel);
}

.post-content h1 {
  margin-top: 0;
}

.post-content pre {
  background: var(--bg);
  padding: 16px;
  border-radius: 12px;
  overflow-x: auto;
}

.post-content code {
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .posts-layout {
    grid-template-columns: 1fr;
  }
}

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

  .layout,
  .posts-layout {
    padding: 20px;
  }

  .avatar {
    width: 120px;
    height: 120px;
  }
}