:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #ffffff;
  --muted: #666666;
  --border: #dddddd;
  --accent: #2757c9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e6e6;
    --bg: #17181a;
    --muted: #9a9a9a;
    --border: #333537;
    --accent: #6ea1ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.5;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

.site-nav {
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  display: flex;
  gap: 1rem;
  max-width: 760px;
  margin: 0 auto;
}

.site-nav a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
}

a {
  color: var(--accent);
}

.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.post-date, .tag-count {
  color: var(--muted);
  font-size: 0.85rem;
}

.tag {
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  text-decoration: none;
  margin-right: 0.25rem;
}

.tag-list {
  list-style: none;
  padding: 0;
}

.tag-list li {
  padding: 0.4rem 0;
}

.post-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.post-body img {
  max-width: 100%;
}

.post-body pre {
  overflow-x: auto;
  background: rgba(127, 127, 127, 0.1);
  padding: 0.75rem;
  border-radius: 6px;
}

form label {
  display: block;
  margin: 0.75rem 0 0.25rem;
  font-weight: 600;
}

form input[type="text"] {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

.checkbox-label input {
  width: auto;
}

.editor-row {
  display: flex;
  gap: 1rem;
  margin-top: 0.75rem;
}

.editor-row textarea,
.editor-row #preview-pane {
  flex: 1;
  min-width: 0;
}

textarea#body-input {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
}

#preview-pane {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  overflow: auto;
}

.upload-row {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

button {
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  padding: 0.5rem 0.9rem;
  border-radius: 4px;
}

button[type="submit"] {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.button {
  display: inline-block;
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 0.5rem 0.9rem;
  border-radius: 4px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th, .admin-table td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.admin-table form {
  display: inline;
}

.actions a, .actions button {
  margin-right: 0.4rem;
}

.error {
  color: #c0392b;
}

.post-links {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .editor-row {
    flex-direction: column;
  }
}