:root, [data-theme="dark"] {
  --bg: #0a0a0c;
  --bg-alt: #111113;
  --border: #18181b;
  --border2: #27272a;
  --text: #d4d4d8;
  --text-head: #e4e4e7;
  --text-dim: #71717a;
  --text-muted: #52525b;
  --accent: #22d3ee;
  --accent2: #2dd4bf;
  --code-bg: #18181b;
  --pre-bg: #111113;
  --tag-bg: #18181b;
  --orange: #fb923c;
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-alt: #f5f5f5;
  --border: #e5e5e5;
  --border2: #d4d4d4;
  --text: #1a1a1a;
  --text-head: #000000;
  --text-dim: #888888;
  --text-muted: #aaaaaa;
  --accent: #0891b2;
  --accent2: #0d9488;
  --code-bg: #f0f0f0;
  --pre-bg: #f5f5f5;
  --tag-bg: #f0f0f0;
  --orange: #d97706;
}

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

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  padding: 0 20px;
  transition: background 0.2s, color 0.2s;
}

a { color: inherit; }

nav {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo { font-weight: 600; font-size: 1rem; color: var(--text-head); }
nav .links { display: flex; gap: 16px; align-items: center; }
nav .links a { color: var(--text-dim); font-size: 0.85rem; transition: color 0.15s; }
nav .links a:hover { color: var(--text-head); }

.switch-btn {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: none;
  border: 1px solid var(--border2);
  border-radius: 4px;
  padding: 3px 10px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}

.switch-btn:hover { border-color: var(--accent); color: var(--accent); }

#ms { transition: border-color 0.15s; }
#ms:focus { border-color: var(--accent); }
#ms::placeholder { color: var(--text-muted); }

h1 {
  max-width: 640px;
  margin: 40px auto 4px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-head);
}

.desc {
  max-width: 640px;
  margin: 0 auto 40px;
  color: var(--text-dim);
  font-size: 0.88rem;
}

.posts { max-width: 640px; margin: 0 auto; }

.post {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}

.post:last-child { border-bottom: none; }
.post:hover .title { color: var(--text-head); }

.post .date {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.post .title {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 2px;
  transition: color 0.15s;
}

.post .excerpt {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

article { max-width: 640px; margin: 32px auto; }

article h1 { font-size: 1.6rem; font-weight: 700; margin: 0 0 8px; max-width: 100%; color: var(--text-head); }
article .meta { color: var(--text-dim); font-size: 0.82rem; margin-bottom: 32px; }

article .body { font-size: 0.92rem; line-height: 1.8; color: var(--text); }
article .body h2 { font-size: 1.2rem; margin: 28px 0 12px; color: var(--text-head); }
article .body h3 { font-size: 1.05rem; margin: 24px 0 10px; }
article .body p { margin-bottom: 16px; color: var(--text); }
article .body ul, article .body ol { margin: 12px 0 16px 24px; }
article .body li { margin-bottom: 4px; color: var(--text); }
article .body code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.85em;
  color: var(--orange);
  font-family: 'SF Mono', Consolas, monospace;
}
article .body pre {
  background: var(--pre-bg);
  border: 1px solid var(--border2);
  border-radius: 6px;
  padding: 14px 18px;
  overflow-x: auto;
  margin: 20px 0;
  font-size: 0.82rem;
  line-height: 1.5;
}
article .body pre code { background: none; padding: 0; color: var(--text); }
article .body img { max-width: 100%; border-radius: 6px; border: 1px solid var(--border2); margin: 20px 0; }
article .body blockquote {
  border-left: 2px solid var(--border2);
  padding: 4px 16px;
  margin: 20px 0;
  color: var(--text-dim);
  font-style: italic;
}
article .body blockquote p { margin: 0; color: var(--text-dim); }
article .body hr { border: none; border-top: 1px solid var(--border); margin: 28px 0; }
article .body a { color: var(--accent); text-underline-offset: 2px; }
article .body a:hover { color: var(--accent2); }

article .tags { margin-top: 32px; display: flex; gap: 6px; flex-wrap: wrap; }
article .tags .tag {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: var(--tag-bg);
  padding: 2px 10px;
  border-radius: 3px;
}

footer {
  max-width: 640px;
  margin: 48px auto;
  padding: 20px 0 32px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
}