/* Senior Chess Improver
   Layout: black title and footer bars (shared with the WordTsar site), a
   reading column for posts, and the post list set like a scoresheet:
   numbered entries, newest first. Colours are warm and neutral, taken
   from the beach-at-sunset photo and a wooden board: scoresheet cream,
   sand, and a walnut-rust accent; charcoal in dark mode. */
:root {
  --paper: #f7f1e6;        /* scoresheet cream */
  --surface: #efe2cc;      /* sand, for quiet fills */
  --ink: #1f2328;
  --muted: #5b5245;
  --rule: #d8c7ac;
  --accent: #8a3f12;       /* walnut-rust, for links and buttons */
  --accent-ink: #ffffff;
  --bar: #000000;
  --bar-ink: #d9d2c6;
  --bar-hot: #e1c39a;
  --bar-strong: #ffffff;
  --bar-line: #45403a;
  --sq-dark: #b58863;      /* wooden board squares */
  --sq-light: #f0d9b5;

  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --text: "Literata", Georgia, "Times New Roman", serif;

  --wide: 72rem;
  --measure: 42rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1f2328;
    --surface: #2a2e34;
    --ink: #ece6dc;
    --muted: #b3aa9c;
    --rule: #3b4048;
    --accent: #e6b98a;
    --accent-ink: #2a1a0c;
    --bar: #000000;
    --bar-ink: #c9c2b6;
    --bar-hot: #e1c39a;
    --sq-dark: #a07554;
    --sq-light: #dcc3a1;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #1f2328;
  --surface: #2a2e34;
  --ink: #ece6dc;
  --muted: #b3aa9c;
  --rule: #3b4048;
  --accent: #e6b98a;
  --accent-ink: #2a1a0c;
  --bar: #000000;
  --bar-ink: #c9c2b6;
  --bar-hot: #e1c39a;
  --sq-dark: #a07554;
  --sq-light: #dcc3a1;
  color-scheme: dark;
}

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

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--text);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-optical-sizing: auto;
}
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
[hidden] { display: none !important; }

.skip { position: absolute; left: -999px; top: 0; background: var(--paper); color: var(--ink); padding: 0.5rem 1rem; z-index: 20; }
.skip:focus { left: 1rem; }

.wrap {
  max-width: var(--wide);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.measure { max-width: var(--measure); }

/* Title and footer bars */
.bar { background: var(--bar); color: var(--bar-ink); font-family: var(--display); }
.bar__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.4rem 1.5rem; padding-block: 0.8rem; }
.brand { color: var(--bar-strong); text-decoration: none; font-weight: 700; font-stretch: 85%; font-size: 1.125rem; letter-spacing: 0.005em; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem 1.25rem; font-size: 0.9375rem; }
.nav a { color: var(--bar-ink); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--bar-hot); }
.nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 0.35em; }
.nav__search {
  font: inherit; color: var(--bar-ink); background: none; cursor: pointer;
  border: 1px solid var(--bar-line); border-radius: 4px; padding: 0.15rem 0.6rem;
}
.nav__search:hover { color: var(--bar-hot); border-color: var(--bar-hot); }

.bar--bottom { margin-top: 4rem; font-size: 0.875rem; }
.bar__inner--footer { padding-block: 1.25rem; align-items: flex-start; }
.bar--bottom p { margin: 0; }
.footer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.bar--bottom a { color: var(--bar-ink); }
.bar--bottom a:hover { color: var(--bar-hot); }

/* Search */
.search { background: var(--surface); border-bottom: 1px solid var(--rule); }
.search__inner { padding-block: 1.25rem 1.5rem; }
.search__label { display: block; font-family: var(--display); font-weight: 600; margin-bottom: 0.4rem; }
.search__row { display: flex; gap: 0.75rem; }
.search__input {
  flex: 1; min-width: 0; font: inherit; font-size: 1.125rem; color: var(--ink);
  background: var(--paper); border: 1px solid var(--rule); border-radius: 4px; padding: 0.6rem 0.8rem;
}
.search__close { font-family: var(--display); font-size: 0.9375rem; background: none; border: 0; color: var(--accent); cursor: pointer; text-decoration: underline; text-underline-offset: 0.2em; }
.search__status { margin: 0.75rem 0 0; font-family: var(--display); font-size: 0.875rem; color: var(--muted); }
.search__results { list-style: none; margin: 0.5rem 0 0; padding: 0; display: grid; gap: 0.6rem; max-width: var(--measure); }
.search__results a { font-family: var(--display); font-weight: 600; font-size: 1.0625rem; }
.search__results span { display: block; font-size: 0.875rem; color: var(--muted); font-family: var(--display); }

/* Home: the opening photo with the site title over the sky */
.hero {
  position: relative; isolation: isolate; display: grid;
  min-height: clamp(18rem, 44vw, 34rem); margin-bottom: 3rem;
  background: #1b1d21; color: #ffffff;
}
.hero__image { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; object-position: 50% 62%; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.22) 45%, rgba(0, 0, 0, 0) 75%);
}
.hero__text { align-self: start; width: 100%; padding-block: clamp(2.5rem, 7vw, 5.5rem) 2rem; text-align: center; }
.hero__title {
  margin: 0; font-family: var(--display); font-weight: 800; font-stretch: 80%;
  font-size: clamp(2.6rem, 1.4rem + 5.4vw, 5.25rem); line-height: 0.98; letter-spacing: -0.02em;
  text-wrap: balance; text-shadow: 0 1px 14px rgba(0, 0, 0, 0.35);
}
.hero__lede {
  margin: 0.9rem auto 0; max-width: 36rem; font-size: clamp(1.0625rem, 0.95rem + 0.5vw, 1.3rem); line-height: 1.45;
  color: rgba(255, 255, 255, 0.92); text-shadow: 0 1px 10px rgba(0, 0, 0, 0.45);
}
.hero--plain { min-height: 0; background: none; color: var(--ink); }
.hero--plain::before { content: none; }
.hero--plain .hero__title, .hero--plain .hero__lede { color: inherit; text-shadow: none; }

/* Plain big title, used by the 404 page */
.intro { padding-block: 3.5rem 2.5rem; }
.intro__title {
  margin: 0; font-family: var(--display); font-weight: 800; font-stretch: 80%;
  font-size: clamp(2.6rem, 1.4rem + 5.4vw, 5.25rem); line-height: 0.98; letter-spacing: -0.02em;
  text-wrap: balance;
}
.intro__lede { margin: 1rem 0 0; max-width: 38rem; font-size: 1.25rem; line-height: 1.5; color: var(--muted); }

.latest__link { display: grid; gap: 1.25rem 2.5rem; color: inherit; text-decoration: none; }
@media (min-width: 52rem) { .latest__link { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); align-items: center; } }
.latest__image { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 6px; display: block; }
.latest__label { margin: 0 0 0.4rem; font-family: var(--display); font-weight: 600; font-size: 0.9375rem; color: var(--accent); }
.latest__title { margin: 0; font-family: var(--display); font-weight: 700; font-stretch: 90%; font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem); line-height: 1.1; letter-spacing: -0.01em; text-wrap: balance; }
.latest__link:hover .latest__title { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 0.12em; }
.latest__desc { margin: 0.9rem 0 0; font-size: 1.0625rem; color: var(--muted); }
.latest__meta { margin: 0.9rem 0 0; font-family: var(--display); font-size: 0.875rem; color: var(--muted); }

/* Scoresheet list */
.sheet { padding-block: 3rem 0; }
.sheet__title { margin: 0 0 0.75rem; font-family: var(--display); font-weight: 700; font-size: 1.375rem; letter-spacing: -0.005em; }
.sheet__count { font-weight: 500; font-size: 1rem; color: var(--muted); margin-left: 0.4rem; }
.sheet__list { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid var(--rule); }
.row { display: grid; grid-template-columns: 3.25rem minmax(0, 1fr); gap: 0 1rem; padding-block: 1.1rem; border-top: 1px solid var(--rule); }
.row--plain { grid-template-columns: minmax(0, 1fr); }
.row__no { font-family: var(--display); font-weight: 700; font-size: 1.375rem; line-height: 1.2; color: var(--muted); font-variant-numeric: tabular-nums; text-align: right; }
.row__body { min-width: 0; max-width: 46rem; }
.row__title { margin: 0; font-family: var(--display); font-weight: 600; font-size: 1.25rem; line-height: 1.25; letter-spacing: -0.005em; }
.row__title a { color: var(--ink); text-decoration: none; }
.row__title a:hover { color: var(--accent); text-decoration: underline; }
.row__desc { margin: 0.35rem 0 0; font-size: 1rem; line-height: 1.55; color: var(--muted); }
.row__meta { margin: 0.45rem 0 0; font-family: var(--display); font-size: 0.875rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }
.row__tags { display: inline-flex; flex-wrap: wrap; gap: 0.25rem 0.75rem; }
.row--thumb { grid-template-columns: 3.25rem minmax(0, 1fr) 5rem; }
.row--thumb.row--plain { grid-template-columns: minmax(0, 1fr) 5rem; }
.row__thumb { display: block; align-self: start; }
.row__thumb img { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 4px; background: var(--surface); }
@media (min-width: 44rem) {
  .row--thumb { grid-template-columns: 3.25rem minmax(0, 1fr) 10.5rem; gap: 0 1.5rem; }
  .row--thumb.row--plain { grid-template-columns: minmax(0, 1fr) 10.5rem; }
  .row__thumb img { aspect-ratio: 3 / 2; }
}
.row__thumb:hover img { outline: 2px solid var(--accent); outline-offset: 2px; }

.pages { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; align-items: center; padding-block: 1.25rem; font-family: var(--display); font-size: 0.9375rem; color: var(--muted); }

.topics { padding-block: 3rem 0; }
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chips a {
  display: inline-flex; align-items: baseline; gap: 0.4rem; font-family: var(--display); font-size: 0.9375rem;
  text-decoration: none; color: var(--ink); background: var(--surface); border-radius: 4px; padding: 0.3rem 0.65rem;
}
.chips a span { color: var(--muted); font-size: 0.8125rem; font-variant-numeric: tabular-nums; }
.chips a:hover, .chips a[aria-current="true"] { background: var(--accent); color: var(--accent-ink); }
.chips a:hover span, .chips a[aria-current="true"] span { color: inherit; }
.chips__all { background: none !important; color: var(--accent) !important; text-decoration: underline !important; }

.topics--page { padding-block: 3rem 1rem; }
.topics--page .post__lede { margin-bottom: 1.5rem; }
.tag-section { padding-block: 2rem 0; }

/* Posts and pages */
.post__head { padding-block: 3rem 1.75rem; }
.post__head .measure { max-width: 54rem; }
.post__lede { max-width: var(--measure); }
.post__tags { margin: 0 0 0.75rem; display: flex; flex-wrap: wrap; gap: 0.25rem 0.9rem; font-family: var(--display); font-size: 0.9375rem; font-weight: 500; }
.post__title { margin: 0; font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: clamp(2.1rem, 1.3rem + 3.2vw, 3.4rem); line-height: 1.04; letter-spacing: -0.015em; text-wrap: balance; }
.post__lede { margin: 1rem 0 0; font-size: 1.25rem; line-height: 1.5; color: var(--muted); }
.post__meta { margin: 1rem 0 0; font-family: var(--display); font-size: 0.9375rem; color: var(--muted); }
.post__image { margin-block: 0 2.5rem; }
.post__image img { display: block; width: 100%; max-height: 32rem; object-fit: cover; border-radius: 6px; }
.post__image--page img { max-height: 22rem; }

.prose { font-size: 1.125rem; line-height: 1.72; overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose table, .prose figure, .prose pre { margin: 0 0 1.25em; }
.prose h1, .prose h2, .prose h3, .prose h4 { font-family: var(--display); line-height: 1.2; letter-spacing: -0.005em; text-wrap: balance; }
.prose h1, .prose h2 { font-weight: 700; font-size: 1.65rem; margin: 2.2em 0 0.6em; }
.prose h3 { font-weight: 650; font-size: 1.3rem; margin: 1.8em 0 0.5em; }
.prose h4 { font-weight: 600; font-size: 1.1rem; margin: 1.6em 0 0.4em; }
.prose li { margin-bottom: 0.35em; }
.prose img { border-radius: 4px; display: inline-block; vertical-align: middle; }
.prose small, .prose sub, .prose sup { color: var(--muted); }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5em 0; }
.prose blockquote { border-left: 3px solid var(--accent); padding: 0.1em 0 0.1em 1.1em; color: var(--ink); }
.prose blockquote * { font-size: inherit !important; }
.prose code { font-size: 0.9em; background: var(--surface); padding: 0.08em 0.3em; border-radius: 3px; }
.prose pre { background: var(--surface); padding: 1rem; border-radius: 6px; overflow-x: auto; font-size: 0.9rem; line-height: 1.5; }
.prose pre code { background: none; padding: 0; }
.prose table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; font-family: var(--display); font-size: 0.9375rem; line-height: 1.4; }
.prose th, .prose td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
.prose th { font-weight: 600; border-bottom-width: 2px; white-space: nowrap; }
.prose iframe { display: block; max-width: 100%; border: 0; margin: 0 0 1.25em; }
.prose iframe[src*="youtube"] { width: 100%; height: auto; aspect-ratio: 16 / 9; }
.prose [style*="760px"], .prose [style*="900px"] { max-width: 100%; }
.prose div[style*="border"] { border-color: var(--rule) !important; border-radius: 6px; }

.post__foot { padding-top: 1.5rem; }
.share { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin: 0 0 2rem; padding-top: 1.25rem; border-top: 1px solid var(--rule); font-family: var(--display); font-size: 0.9375rem; color: var(--muted); }
.pager { display: grid; gap: 1rem; margin-bottom: 2.5rem; }
@media (min-width: 40rem) { .pager { grid-template-columns: 1fr 1fr; } }
.pager__link { display: block; padding: 1rem 1.1rem; background: var(--surface); border-radius: 6px; color: var(--ink); text-decoration: none; font-family: var(--display); font-weight: 600; line-height: 1.3; }
.pager__link span { display: block; font-weight: 500; font-size: 0.875rem; color: var(--accent); margin-bottom: 0.2rem; }
.pager__link--next { text-align: right; }
@media (min-width: 40rem) { .pager__link--next { grid-column: 2; } }
.pager__link:hover { outline: 1px solid var(--accent); }

.comments h2 { font-family: var(--display); font-weight: 700; font-size: 1.375rem; margin: 0 0 1rem; }

/* Buttons and forms */
.button {
  display: inline-block; font-family: var(--display); font-weight: 600; font-size: 1rem;
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 4px; padding: 0.7rem 1.1rem;
  text-decoration: none; cursor: pointer;
}
.button:hover { text-decoration: underline; text-underline-offset: 0.2em; }
.form { display: grid; gap: 1rem; max-width: 32rem; margin-top: 1.5rem; }
.form__field { display: grid; gap: 0.3rem; }
.form label { font-family: var(--display); font-weight: 600; font-size: 0.9375rem; }
.form input, .form textarea {
  font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--rule); border-radius: 4px; padding: 0.6rem 0.75rem; width: 100%;
}
.form input:focus, .form textarea:focus { border-color: var(--accent); }
.form .button { justify-self: start; }

.notfound { padding-block: 5rem 3rem; }
.notfound__code { margin: 0 0 0.5rem; font-family: var(--display); font-weight: 700; color: var(--accent); font-size: 1.125rem; }

/* Chess boards (Lichess PGN viewer) */
.board { margin: 2rem 0; max-width: 40rem; }
.board--pending { aspect-ratio: 1; max-width: 26rem; background: var(--surface); border-radius: 6px; }
.board .lpv {
  --c-lpv-bg: var(--surface);
  --c-lpv-bg-player: var(--surface);
  --c-lpv-bg-controls: var(--surface);
  --c-lpv-bg-movelist: var(--paper);
  --c-lpv-bg-pane: var(--paper);
  --c-lpv-bg-variation: var(--surface);
  --c-lpv-font: var(--ink);
  --c-lpv-font-shy: var(--muted);
  --c-lpv-font-bg: var(--muted);
  --c-lpv-pgn-text: var(--ink);
  --c-lpv-accent: var(--accent);
  --c-lpv-accent-over: var(--accent-ink);
  --c-lpv-border: var(--rule);
  --c-lpv-side-border: var(--rule);
  --c-lpv-past-moves: var(--muted);
  --c-lpv-move-hover: var(--surface);
  --c-lpv-current-move: var(--accent);
  font-family: var(--display);
  box-shadow: none;
  border: 1px solid var(--rule);
  border-radius: 6px;
}
.board cg-board {
  background-color: var(--sq-light);
  background-image: conic-gradient(var(--sq-dark) 0 25%, transparent 0 50%, var(--sq-dark) 0 75%, transparent 0);
  background-size: 25% 25%;
}
.board-note { margin: -1.25rem 0 2rem; font-family: var(--display); font-size: 0.875rem; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}