/* Luke137: one centered column, Helvetica Neue everywhere. */
:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --border: #e2e2e2;
  --link: #0645ad;
  --link-visited: #5a3696;
  --surface: #f5f5f5;
  --accent: #1a1a1a;
  --accent-fg: #ffffff;
  --notice: #fff8d6;
  --error: #b3261e;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121212;
    --fg: #e6e6e6;
    --muted: #9a9a9a;
    --border: #2e2e2e;
    --link: #8ab4f8;
    --link-visited: #c58af9;
    --surface: #1d1d1d;
    --accent: #e6e6e6;
    --accent-fg: #121212;
    --notice: #3a3420;
    --error: #f2b8b5;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121212;
  --fg: #e6e6e6;
  --muted: #9a9a9a;
  --border: #2e2e2e;
  --link: #8ab4f8;
  --link-visited: #c58af9;
  --surface: #1d1d1d;
  --accent: #e6e6e6;
  --accent-fg: #121212;
  --notice: #3a3420;
  --error: #f2b8b5;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
/* All fonts are Helvetica Neue, including code and form controls. */
code, pre, kbd, samp, input, textarea, select, button { font-family: inherit; font-size: inherit; }

body {
  margin: 0 auto;
  max-width: 680px;
  padding: 32px 16px 80px;
  background: var(--bg);
  color: var(--fg);
  font-size: 18px;
  line-height: 1.6;
}
body.wide { max-width: 1200px; }

a { color: var(--link); }
a:visited { color: var(--link-visited); }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; }
h1 { font-size: 1.75rem; margin: 1.5rem 0 0.5rem; }
h2 { font-size: 1.35rem; margin-top: 2rem; }
h3 { font-size: 1.15rem; margin-top: 1.75rem; }

.muted { color: var(--muted); }
.inline { display: inline; }

/* Header */
.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 20px;
  margin-bottom: 40px;
}
.site-title { font-weight: 700; font-size: 1.2rem; color: var(--fg) !important; text-decoration: none; margin-right: auto; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 4px 16px; align-items: baseline; }
.site-header nav a { color: var(--fg); }

.link-button {
  background: none; border: 0; padding: 0; margin: 0;
  color: var(--link); text-decoration: underline; cursor: pointer; font-size: inherit;
}
.site-footer { margin-top: 64px; font-size: 0.85rem; }
.site-footer .link-button { color: var(--muted); }

.admin-nav {
  display: flex; flex-wrap: wrap; gap: 4px 16px;
  padding: 8px 0; margin: -24px 0 24px;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.admin-nav a, .admin-nav .link-button { color: var(--fg); }

/* Post lists */
.intro { margin-top: 0; }
.post-list, .tag-list, .admin-posts { list-style: none; padding: 0; margin: 0 0 24px; }
.post-list li {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: 6px 0;
}
.post-list time { color: var(--muted); font-size: 0.9rem; white-space: nowrap; }
.tag-list li { padding: 3px 0; }
.admin-posts li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.admin-posts li .muted { display: block; font-size: 0.85rem; }
@media (max-width: 520px) {
  .post-list li { flex-direction: column; gap: 0; }
}

/* Articles */
article h1 { margin-bottom: 0.25rem; }
.meta { color: var(--muted); font-size: 0.9rem; margin-top: 0; }
.meta a { color: var(--muted); }
.hero { display: block; width: 100%; height: auto; border-radius: 4px; margin: 0 0 24px; }
.tags { margin-top: 40px; font-size: 0.9rem; }
.tags a { margin-right: 8px; }

.prose img, .prose video { max-width: 100%; height: auto; }
.prose blockquote { margin: 1.5em 0; padding: 0 0 0 1em; border-left: 3px solid var(--border); color: var(--muted); }
.prose pre { background: var(--surface); padding: 12px 16px; overflow-x: auto; border-radius: 4px; line-height: 1.45; font-size: 0.9rem; }
.prose code { background: var(--surface); padding: 0.1em 0.3em; border-radius: 3px; font-size: 0.92em; }
.prose pre code { background: none; padding: 0; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2.5em 0; }
.prose table { border-collapse: collapse; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.prose mark { background: var(--notice); color: inherit; }
.prose .footnotes { font-size: 0.9rem; color: var(--muted); }

/* Messages */
.notice { background: var(--notice); padding: 10px 14px; border-radius: 4px; font-size: 0.95rem; }
.error { color: var(--error); }
.badge { border: 1px solid var(--border); border-radius: 3px; padding: 0 5px; font-size: 0.8rem; }
.danger { color: var(--error) !important; }

/* Forms */
input, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
}
input:focus, textarea:focus { outline: 2px solid var(--link); outline-offset: -1px; }
label { display: block; font-size: 0.9rem; }
label input { margin-top: 4px; }
label small { display: block; margin-top: 2px; }
.stack { display: grid; gap: 14px; }
.narrow { max-width: 360px; }
button:not(.link-button), .button {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background: var(--accent);
  color: var(--accent-fg) !important;
  cursor: pointer;
  text-decoration: none;
  font-size: 0.95rem;
}
button.secondary { background: transparent; color: var(--fg) !important; }
.button.small { font-size: 0.8rem; padding: 3px 10px; vertical-align: middle; margin-left: 8px; }
.stats-line { font-size: 0.9rem; color: var(--muted); }

/* Editor */
.editor { display: grid; gap: 12px; }
.title-input { font-size: 1.6rem; font-weight: 700; border: 0; border-bottom: 1px solid var(--border); border-radius: 0; padding: 6px 0; }
.title-input:focus { outline: none; border-bottom-color: var(--fg); }
.settings summary { cursor: pointer; font-size: 0.9rem; color: var(--muted); }
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin-top: 12px; }
.editor-tabs { display: none; gap: 8px; }
.editor-tabs button { background: transparent; color: var(--muted) !important; border-color: var(--border); padding: 4px 12px; }
.editor-tabs button.active { color: var(--fg) !important; border-color: var(--fg); }
.editor-panes { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.editor-panes textarea {
  min-height: 65vh;
  resize: vertical;
  line-height: 1.6;
  font-size: 1rem;
  padding: 12px;
}
.preview {
  min-height: 65vh;
  max-height: 80vh;
  overflow-y: auto;
  padding: 0 4px 0 24px;
  border-left: 1px solid var(--border);
}
.preview > :first-child { margin-top: 0; }
.editor-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; position: sticky; bottom: 0; background: var(--bg); padding: 12px 0; border-top: 1px solid var(--border); }
.editor-actions .spacer { flex: 1; }
#save-status { font-size: 0.85rem; }
.delete-form { margin-top: 24px; font-size: 0.9rem; }

@media (max-width: 860px) {
  .editor-tabs { display: flex; }
  .editor-panes { grid-template-columns: 1fr; }
  .editor-panes[data-mode="write"] .preview { display: none; }
  .editor-panes[data-mode="preview"] textarea { display: none; }
  .preview { border-left: 0; padding: 0; max-height: none; }
}

/* Stats */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; margin: 24px 0; }
.stat-grid div { border: 1px solid var(--border); border-radius: 4px; padding: 10px 14px; }
.stat-grid dt { font-size: 0.8rem; color: var(--muted); }
.stat-grid dd { margin: 0; font-size: 1.6rem; font-weight: 700; }
.daily { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.daily th, .daily td { text-align: left; padding: 4px 8px 4px 0; border-bottom: 1px solid var(--border); }
.daily th { color: var(--muted); font-weight: 400; }
.bar-col { width: 40%; }
.bar { display: inline-block; height: 8px; background: var(--fg); opacity: 0.6; border-radius: 2px; }