/* Tessolari blog — minimal stylesheet that echoes the main site
   palette without depending on its component library. */

:root {
  --bg: #e8e5dc;
  --bg-alt: #dcd8ce;
  --text: #1a1a2e;
  --text-muted: #4a4a5a;
  --primary: #1a6db5;
  --primary-hover: #0e5a96;
  --border: #c5c0b3;
  --max-width: 50rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --radius-sm: 4px;
}

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

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; padding-block: var(--space-2xl); }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

a { color: var(--primary); text-underline-offset: 0.15em; }
a:hover, a:focus-visible { color: var(--primary-hover); }
a:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; border-radius: var(--radius-sm); }

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; color: var(--text); }
h1 { font-size: 2.25rem; margin-block-end: var(--space-md); }
h2 { font-size: 1.5rem; margin-block-end: var(--space-sm); }
h3 { font-size: 1.25rem; margin-block-end: var(--space-sm); }

p, ul, ol { margin-block-end: var(--space-md); }
ul, ol { padding-inline-start: var(--space-lg); }
li { margin-block-end: var(--space-xs); }

.skip-link {
  position: absolute;
  inset-inline-start: -9999px;
  background: var(--text);
  color: var(--bg);
  padding: var(--space-sm) var(--space-md);
}
.skip-link:focus { inset-inline-start: var(--space-md); top: var(--space-md); z-index: 100; }

.site-header {
  background: var(--bg-alt);
  border-block-end: 1px solid var(--border);
  padding-block: var(--space-md);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.site-header__name {
  font-weight: 700;
  text-decoration: none;
  font-size: 1.25rem;
  color: var(--text);
}
.site-header nav a { margin-inline-start: var(--space-md); color: var(--text-muted); }

.site-footer {
  background: var(--bg-alt);
  border-block-start: 1px solid var(--border);
  padding-block: var(--space-lg);
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-block-start: var(--space-2xl);
}
.site-footer p { margin: 0; }

.page-header { margin-block-end: var(--space-xl); }
.page-header .lead { color: var(--text-muted); font-size: 1.125rem; }

.post-list { list-style: none; padding: 0; }
.post-list__item { padding-block: var(--space-lg); border-block-end: 1px solid var(--border); }
.post-list__item:first-child { padding-block-start: 0; }
.post-list__meta { color: var(--text-muted); font-size: 0.95rem; margin-block-end: var(--space-sm); }

/* Homepage tile grid ------------------------------------------------ */

/* The homepage gets a wider container than the article width so the
   grid has room for three columns; the header/footer keep their own
   .container at the reading width. */
.container--wide { max-width: 64rem; }

/* Default and mobile: a single, shift-free column. From 40rem up it
   becomes a multi-column grid and the deferred masonry.js assigns row
   spans for the ragged packed layout (adding .post-grid--masonry).
   With JavaScript off it stays a tidy equal-row grid. */
.post-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}
.post-grid__item { margin: 0; }

@media (min-width: 40rem) {
  .post-grid { grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); }
  /* Masonry: zero the row-gap and fold the intended vertical gutter
     into each item's row span in masonry.js. A large row-gap between
     every fine-grained auto-row over-allocates on span rounding, which
     made the gaps between rows drift wider than the column gap. With
     row-gap:0 the only vertical spacing is the gutter the script adds,
     so rows and columns share the same --space-lg gap. */
  .post-grid--masonry { grid-auto-rows: 4px; row-gap: 0; align-items: start; }
}

/* Equal-height cards only when NOT in masonry mode — masonry needs each
   card at its natural height to measure the row span. */
.post-grid:not(.post-grid--masonry) .post-card { height: 100%; }

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.post-card__media { aspect-ratio: 16 / 9; background: var(--border); }
.post-card__media img { display: block; width: 100%; height: 100%; object-fit: cover; }

.post-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  flex: 1;
}
.post-card__title { font-size: 1.25rem; line-height: 1.3; margin: 0; }
/* Kept at --text (12:1 on the card surface) in every state: --primary
   is only 3.8:1 here and would fail AAA, so hover/focus feedback is the
   underline, not a colour change. */
.post-card__link { color: var(--text); text-decoration: none; }
.post-card__link:hover, .post-card__link:focus-visible { color: var(--text); }
.post-card:hover .post-card__title { text-decoration: underline; text-underline-offset: 0.15em; }

/* Stretched link: the whole tile is clickable, but the link's
   accessible name stays the headline and heading semantics are kept. */
.post-card__link::after { content: ""; position: absolute; inset: 0; }

/* The card has overflow:hidden, which would clip a focus ring on the
   inner link, so the keyboard focus indicator lives on the card. The
   plain :focus-within rule works everywhere; where :has is supported
   we tighten it to keyboard focus only and drop the inner ring. */
.post-card:focus-within { outline: 3px solid var(--primary); outline-offset: 3px; }
.post-card__link:focus-visible { outline: none; }
@supports selector(:has(*)) {
  .post-card:focus-within { outline: none; }
  .post-card:has(.post-card__link:focus-visible) { outline: 3px solid var(--primary); outline-offset: 3px; }
}

.post-card__cta {
  margin-block-start: auto;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
}
.post-card:hover .post-card__cta { text-decoration: underline; text-underline-offset: 0.15em; }

/* Text tile (post with no featured image) and the RSS subscribe tile
   both lead with body text rather than an image. */
.post-card--text .post-card__body,
.post-card--rss .post-card__body { padding-block: var(--space-xl); }
.post-card--rss { border-style: dashed; }
.post-card__rss-icon { color: var(--primary); vertical-align: middle; margin-left: 0.35em; }

.post__hero {
  margin: 0 0 var(--space-xl) 0;
}
.post__hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 4px;
}
.post__hero-caption {
  margin-block-start: var(--space-xs);
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.4;
}
.post__hero-caption a {
  color: inherit;
  text-decoration: underline;
}

.post__meta { color: var(--text-muted); font-size: 0.95rem; margin-block-end: var(--space-sm); }
.post__body p, .post__body ul, .post__body ol { margin-block-end: var(--space-md); }
.post__body h2 { margin-block-start: var(--space-xl); }
.post__body h3 { margin-block-start: var(--space-lg); }

.post__footer {
  margin-block-start: var(--space-2xl);
  padding-block-start: var(--space-lg);
  border-block-start: 1px solid var(--border);
  color: var(--text-muted);
}
.post__footer p { margin-block-end: var(--space-xs); }

.post__comments {
  margin-block-start: var(--space-2xl);
  padding-block-start: var(--space-lg);
  border-block-start: 1px solid var(--border);
}
.post__comments h2 { margin-block-end: var(--space-sm); }
.post__comments-intro { color: var(--text-muted); margin-block-end: var(--space-md); }
.discourse-embed-source { display: none; }

.comment-list { list-style: none; padding: 0; margin: 0; }
.comment {
  padding-block: var(--space-md);
  border-block-start: 1px solid var(--border);
}
.comment:first-child { border-block-start: 0; padding-block-start: 0; }
.comment__head {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  margin-block-end: var(--space-sm);
}
.comment__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
}
.comment__meta { display: flex; flex-direction: column; line-height: 1.3; }
.comment__author { font-weight: 700; color: var(--text); }
.comment__date a, .comment__date { color: var(--text-muted); font-size: 0.9rem; }
.comment__body { color: var(--text); }
.comment__body p:last-child { margin-block-end: 0; }
.comment__body img { max-width: 100%; height: auto; }
.comment__body blockquote {
  border-inline-start: 3px solid var(--border);
  margin-inline-start: 0;
  padding-inline-start: var(--space-sm);
  color: var(--text-muted);
}
.comment__actions { margin-block-start: var(--space-xs); font-size: 0.9rem; }
.comment-list__more { margin-block-start: var(--space-lg); }

.btn {
  display: inline-block;
  padding: 0.6em 1.1em;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn--secondary {
  background: var(--bg-alt);
  color: var(--text);
  border-color: var(--text-muted);
}
.btn--secondary:hover, .btn--secondary:focus {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

/* Accordions — match the look of the main site, but standalone. */
.content-accordion {
  border-block-end: 1px solid var(--border);
}
.content-accordion[open] { padding-block-end: var(--space-md); }
.content-accordion__summary {
  list-style: none;
  cursor: pointer;
  padding-block: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  user-select: none;
}
.content-accordion__summary::-webkit-details-marker { display: none; }
.content-accordion__summary > h2 { margin: 0; font-size: 1.25rem; }
.content-accordion__summary::after {
  content: "";
  display: inline-block;
  width: 0.6em;
  height: 0.6em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-block-start: -0.2em;
  flex-shrink: 0;
}
.content-accordion[open] > .content-accordion__summary::after { transform: rotate(-135deg); margin-block-start: 0.15em; }
.content-accordion__panel { padding-block-start: var(--space-xs); }
.content-accordion__panel > :first-child { margin-block-start: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a2e;
    --bg-alt: #232337;
    --text: #e8e5dc;
    --text-muted: #b0acaa;
    --border: #333348;
    --primary: #6aaeed;
    --primary-hover: #94c5f2;
  }
}