/* Shared by blog.html (the feed) and the standalone post pages
   publish_blog.py writes under content/posts/<date>/. */
:root {
  color-scheme: light;
  --page:           #f9f9f7;
  --surface:        #fcfcfb;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --hairline:       #e1e0d9;
  --border:         rgba(11, 11, 11, 0.10);
  --hot:            #2a78d6;
  --cold:           #e34948;
  --chip:           rgba(11, 11, 11, 0.05);
  --accent:         #7d3ff0;
  --accent-ink:     #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page:           #0d0d0d;
    --surface:        #1a1a19;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --hairline:       #2c2c2a;
    --border:         rgba(255, 255, 255, 0.10);
    --hot:            #6ba6e8;
    --cold:           #f07b7a;
    --chip:           rgba(255, 255, 255, 0.07);
    --accent:         #9d6bff;
    --accent-ink:     #12071f;
  }
}
* { box-sizing: border-box; }
/* a class that sets display beats the UA rule for [hidden], and both the
   filter row and the load-more button set one — so make hidden win */
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 20px 20px 64px; }

/* the brand bar, shared by every page (index, my-teams, groups, about, blog.css) */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: blur(10px) saturate(1.6);
  -webkit-backdrop-filter: blur(10px) saturate(1.6);
  border-bottom: 1px solid var(--hairline);
}
.bar {
  max-width: 760px; margin: 0 auto; padding: 9px 20px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 4px 16px; flex-wrap: wrap;
}
.wordmark {
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
  font-size: 17px; font-weight: 700; letter-spacing: -0.025em;
  color: var(--text-primary); text-decoration: none;
}
.wordmark svg { width: 15px; height: 15px; display: block; }
.wordmark .b1 { fill: var(--text-muted); opacity: 0.5; }
.wordmark .b2 { fill: var(--text-muted); }
.wordmark .b3 { fill: var(--accent); transform-origin: 50% 100%; transition: transform 0.18s ease; }
.wordmark:hover .b3 { transform: scaleY(1.14); }
nav { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
nav a {
  color: var(--text-secondary); font-size: 13px; text-decoration: none;
  padding: 5px 9px; border-radius: 999px;
  transition: color 0.15s ease, background 0.15s ease;
}
nav a:hover { color: var(--text-primary); background: var(--chip); }
nav [aria-current="page"] { color: var(--text-primary); font-weight: 650; background: var(--chip); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

h1 { font-size: 25px; font-weight: 700; letter-spacing: -0.03em; margin: 0; }
.as-of { color: var(--text-muted); font-size: 13px; margin: 5px 0 0; }
a { color: var(--text-primary); }

/* filter chips */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 4px; }
.filters button {
  font: inherit; font-size: 13px; color: var(--text-secondary);
  background: var(--chip); border: 1px solid transparent; border-radius: 999px;
  padding: 5px 12px; cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}
.filters button:hover { color: var(--text-primary); }
.filters button[aria-pressed="true"] {
  color: var(--accent-ink); font-weight: 600;
  background: var(--accent); border-color: var(--accent);
}

/* one heading per day, however many runs it carries */
.day { margin-top: 30px; }
.day-head { font-size: 13px; font-weight: 650; letter-spacing: 0.02em; margin: 0 0 8px; }
.day-head a { color: var(--text-muted); text-decoration: none; }
.day-head a:hover { color: var(--text-primary); }
.day:target > .day-head a, .post:target .badge { color: var(--text-primary); }

.post {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px; margin: 10px 0;
  scroll-margin-top: 16px;
}
.post:target { border-color: var(--text-muted); }
.badge {
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none;
  font-size: 11px; font-weight: 650; letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--text-secondary); background: var(--chip);
  border-radius: 999px; padding: 3px 10px; margin-bottom: 10px;
}
.badge:hover { color: var(--text-primary); }
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--text-muted); }
.badge[data-kind="daily"]::before { background: var(--hot); }
.badge[data-kind="spotlight"]::before { background: var(--cold); }
.badge[data-kind="streakiness"]::before { background: var(--text-secondary); }
.post h3 { font-size: 20px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.3; margin: 0 0 4px; }
.dek { color: var(--text-secondary); font-size: 14px; margin: 0; }

.finding { margin-top: 24px; }
.finding + .finding { border-top: 1px solid var(--hairline); padding-top: 22px; }
.finding h4 { font-size: 16px; font-weight: 650; line-height: 1.35; margin: 0 0 4px; }
.subhead { color: var(--text-muted); font-size: 13px; margin: 0 0 4px; }

figure { margin: 14px 0 0; }
figure button {
  display: block; position: relative; width: 100%; padding: 0; border: 0;
  background: none; cursor: zoom-in; border-radius: 10px; overflow: hidden;
}
figure img {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--hairline); border-radius: 10px; background: #fcfcfb;
}
/* charts are dense; on a phone the tap-to-enlarge is the whole story */
figure button::after {
  content: "⤢"; position: absolute; top: 8px; right: 8px;
  width: 24px; height: 24px; line-height: 24px; border-radius: 6px;
  font-size: 13px; color: #52514e; background: rgba(252, 252, 251, 0.86);
  box-shadow: 0 0 0 1px #e1e0d9;
}
figcaption { color: var(--text-muted); font-size: 12.5px; margin-top: 6px; }

details { margin-top: 12px; }
details summary {
  cursor: pointer; color: var(--text-secondary); font-size: 13px; font-weight: 600;
  list-style: none; display: inline-flex; align-items: center; gap: 6px;
}
details summary::-webkit-details-marker { display: none; }
details summary::before { content: "▸"; font-size: 11px; color: var(--text-muted); }
details[open] summary::before { content: "▾"; }
details summary:hover { color: var(--text-primary); }
.more-charts { margin-top: 4px; }
dl { margin: 10px 0 0; font-size: 14px; }
dl div { display: flex; gap: 10px; padding: 5px 0; border-top: 1px solid var(--hairline); }
dl div:first-child { border-top: 0; }
dt { color: var(--text-muted); flex: 0 0 34%; }
dd { color: var(--text-secondary); margin: 0; flex: 1; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; margin: 12px 0 0; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 8px 14px; white-space: nowrap; }
th { font-size: 12px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; border-bottom: 1px solid var(--hairline); }
tr + tr td { border-top: 1px solid var(--hairline); }

.more {
  display: block; width: 100%; margin: 24px 0 0; padding: 11px;
  font: inherit; font-size: 14px; font-weight: 600; color: var(--text-primary);
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; cursor: pointer;
  transition: border-color 0.15s ease;
}
.more:hover { border-color: var(--accent); }
.note { color: var(--text-muted); font-size: 13.5px; margin: 24px 0; }

/* full-size viewer: fits to the screen first, click again for actual size */
.lightbox {
  position: fixed; inset: 0; z-index: 10; display: none;
  background: rgba(0, 0, 0, 0.82);
}
.lightbox[open-state="on"] { display: block; }
.lightbox .scroller {
  position: absolute; inset: 0; overflow: auto; padding: 24px;
  display: flex; align-items: center; justify-content: center; cursor: zoom-out;
}
.lightbox img {
  max-width: 100%; max-height: 100%; border-radius: 8px; background: #fcfcfb;
  cursor: zoom-in; flex: none;
}
.lightbox img.actual { max-width: none; max-height: none; cursor: zoom-out; }
.lightbox .close {
  position: absolute; top: 12px; right: 12px; z-index: 1;
  width: 40px; height: 40px; border-radius: 50%; cursor: pointer;
  font: inherit; font-size: 20px; line-height: 1; color: #0b0b0b;
  background: rgba(252, 252, 251, 0.92); border: 0;
}
/* the hint sits over the chart, which is light, so it carries its own pill */
.lightbox .hint {
  position: absolute; left: 50%; transform: translateX(-50%); bottom: 14px;
  margin: 0; padding: 5px 12px; border-radius: 999px; white-space: nowrap;
  color: rgba(255, 255, 255, 0.86); background: rgba(11, 11, 11, 0.72);
  font-size: 12.5px; pointer-events: none;
}

@media (max-width: 560px) {
  main { padding: 16px 12px 48px; }
  .bar { padding: 8px 12px; }
  nav { flex-basis: 100%; }
  h1 { font-size: 21px; }
  .post { padding: 16px 14px; border-radius: 12px; }
  dl div { flex-direction: column; gap: 2px; }
  dt { flex: none; }
  .lightbox .scroller { padding: 12px; }
}

/* --- a post on its own page ------------------------------------------------
   Same furniture as a card in the feed, but it is the destination: the title
   carries the page, the numbers are open, and every chart is shown. */
.post-page { margin-top: 18px; padding: 24px; }
.post-page .dateline { color: var(--text-muted); font-size: 13px; margin: 0 0 6px; }
.post-page h1 { font-size: 25px; font-weight: 700; letter-spacing: -0.025em; line-height: 1.25; margin: 0 0 6px; }
.post-page .finding h3 { font-size: 17px; font-weight: 650; line-height: 1.35; margin: 0 0 4px; }
.post-page .finding:first-of-type { margin-top: 18px; }
.post-page figure a { display: block; border-radius: 10px; }
.as-of a { color: var(--text-secondary); text-decoration: none; }
.as-of a:hover { color: var(--text-primary); text-decoration: underline; }

/* a post whose images have aged out keeps its headline and its numbers */
.archived-note { font-size: 13px; margin: 18px 0 0; }
.post.archived .dek { margin-bottom: 10px; }
.post.archived .finding { margin-top: 14px; }

@media (max-width: 560px) {
  .post-page { padding: 18px 14px; }
  .post-page h1 { font-size: 20px; }
}