/* ==========================================================================
   Shared styles for the project write-ups (gps-pipeline, gps-performance-
   dashboard, pfv-practitioners-guide, football-scouting).
   Loaded before each page's own <style> and before site.css.
   Colour, type and nav/footer tokens live in site.css.
   ========================================================================== */

:root { --max-w: 760px; }

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

body {
  line-height: 1.65;
  font-size: 17px;              /* long reads: one step up from the old 15px */
  -webkit-font-smoothing: antialiased;
}

/* ── ARTICLE ── */
.article {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem var(--space) 2rem;
}
.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  font-size: .78rem; color: var(--fg-muted);
  margin-bottom: 1rem;
  display: flex; align-items: center; gap: .4rem; flex-wrap: wrap;
}
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.article-header h1 { margin-bottom: .6rem; }
.article-meta {
  display: flex; gap: .5rem 1.5rem; flex-wrap: wrap;
  margin-top: 1rem; font-size: .8rem; color: var(--fg-muted);
}
.article-meta span { display: inline-flex; align-items: center; gap: .3rem; }
.article-meta svg { width: 13px; height: 13px; }

/* summary + primary actions under the header */
.tldr {
  margin: 1.5rem 0 0;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.1rem 1.3rem; box-shadow: var(--shadow-sm);
}
.tldr .label {
  display: block; font-size: .7rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .45rem;
}
.tldr ul { list-style: none; display: grid; gap: .4rem; }
.tldr li { position: relative; padding-left: 1.1rem; font-size: .92rem; line-height: 1.55; color: var(--fg); }
.tldr li::before {
  content: ""; position: absolute; left: 0; top: .6em; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
.header-actions { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: 1.1rem; }
.header-actions .btn-primary { color: #fff; }

/* ── TABLE OF CONTENTS ── */
.toc {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
}
.toc-title {
  font-size: .78rem; font-weight: 500; color: var(--fg-muted);
  letter-spacing: .08em; text-transform: uppercase; margin-bottom: .75rem;
}
.toc ol { list-style: none; counter-reset: toc-counter; }
.toc ol li { counter-increment: toc-counter; margin-bottom: .35rem; }
.toc ol li::before {
  content: counter(toc-counter) ".";
  font-family: var(--mono); font-size: .75rem; color: var(--accent);
  margin-right: .5rem; font-weight: 500;
}
.toc a { font-size: .88rem; color: var(--fg-secondary); text-decoration: none; transition: color .15s; }
.toc a:hover { color: var(--accent); }
.toc a.active { color: var(--accent); font-weight: 500; }

/* Wide screens: the contents box moves into the left margin and follows you down */
@media (min-width: 1260px) {
  .toc {
    float: left; position: sticky; top: 96px;
    width: 210px; margin: 0 0 0 -250px;
    padding: 0; background: none; border: 0; box-shadow: none;
    max-height: calc(100vh - 120px); overflow-y: auto;
  }
  .toc ol li { margin-bottom: .2rem; }
  .toc ol li::before { display: none; }
  .toc a {
    display: block; padding: .3rem 0 .3rem .8rem; line-height: 1.4;
    border-left: 2px solid var(--border); font-size: .82rem;
  }
  .toc a.active { border-left-color: var(--accent); }
}

/* ── PROSE ── */
.prose h2 {
  font-family: var(--serif); font-weight: 500;
  font-size: 1.55rem; line-height: 1.25; letter-spacing: -.015em;
  margin: 2.75rem 0 1rem; padding-bottom: .55rem;
  border-bottom: 1px solid var(--border);
}
.prose h3 {
  font-family: var(--serif); font-weight: 500;
  font-size: 1.18rem; margin: 1.8rem 0 .7rem;
}
.prose p { margin-bottom: 1.1rem; color: var(--fg-secondary); line-height: 1.75; }
.prose strong { color: var(--fg); }
/* links are underlined at rest, not just coloured (WCAG 1.4.1) */
.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(31, 86, 70, .35);
  text-decoration-thickness: 1px;
  text-underline-offset: .18em;
  transition: text-decoration-color .15s;
}
.prose a:hover { text-decoration-color: var(--accent); }

/* expandable reference sections */
.prose details {
  margin: 1.5rem 0; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card);
}
.prose details > summary {
  cursor: pointer; list-style: none; padding: 1rem 1.25rem;
  font-family: var(--serif); font-size: 1.15rem; font-weight: 500; color: var(--ink);
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.prose details > summary::-webkit-details-marker { display: none; }
.prose details > summary::after {
  content: "+"; font-family: var(--sans); font-size: 1.2rem; color: var(--accent);
  transition: transform .2s var(--ease);
}
.prose details[open] > summary::after { transform: rotate(45deg); }
.prose details > summary small { font-family: var(--sans); font-size: .8rem; color: var(--fg-muted); font-weight: 400; margin-left: auto; }
.prose details > .details-body { padding: 0 1.25rem 1rem; }
.prose details > summary h2 { margin: 0; padding: 0; border: 0; font-size: 1.25rem; display: inline; }
.prose details[open] > summary { border-bottom: 1px solid var(--border); margin-bottom: 1rem; }

/* ── CALLOUT BOX ── */
.callout {
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.callout p { color: var(--fg); margin: 0; font-size: .92rem; }
.callout-title {
  font-weight: 500; font-size: .8rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: .35rem;
}
.callout-warn { background: #fef7ec; border-left-color: #c4820a; }
.callout-warn .callout-title { color: #a06c05; }

/* ── CODE ── */
code {
  font-family: var(--mono); font-size: .82em;
  background: #ecebe5; padding: .12rem .38rem; border-radius: 3px; color: var(--fg);
}
pre {
  background: #1e1e1e; color: #d4d4d4; border-radius: 6px;
  padding: 1.2rem 1.4rem; overflow-x: auto; margin: 1.2rem 0 1.5rem;
  line-height: 1.6; font-size: .82rem; border: 1px solid #333;
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.code-header {
  display: flex; justify-content: space-between; align-items: center;
  background: #2d2d2d; padding: .5rem 1rem;
  border-radius: 6px 6px 0 0; border: 1px solid #333; border-bottom: none; margin-top: 1.2rem;
}
.code-header + pre { margin-top: 0; border-radius: 0 0 6px 6px; }
.code-header span { font-family: var(--mono); font-size: .72rem; color: #888; font-weight: 500; }
.code-header .copy-btn {
  background: none; border: 1px solid #555; color: #aaa;
  padding: .3rem .6rem; border-radius: 3px; font-size: .7rem;
  cursor: pointer; font-family: var(--sans);
  transition: color .15s, border-color .15s, transform .1s ease-out;
}
.code-header .copy-btn:active { transform: scale(.96); }
.code-header .copy-btn.done { color: #a6e3a1; border-color: #a6e3a1; }

/* Syntax highlighting tokens */
.tok-kw  { color: #c586c0; }
.tok-fn  { color: #dcdcaa; }
.tok-str { color: #ce9178; }
.tok-cmt { color: #6a9955; font-style: italic; }
.tok-num { color: #b5cea8; }
.tok-op  { color: #d4d4d4; }
.tok-cls { color: #4ec9b0; }
.tok-var { color: #9cdcfe; }

/* ── PIPELINE DIAGRAM ── */
.pipeline-diagram { display: flex; align-items: stretch; margin: 2rem 0; overflow-x: auto; padding: .5rem 0; }
.pipeline-stage {
  flex: 1; min-width: 150px; padding: 1.1rem 1rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 6px; text-align: center; position: relative;
}
.pipeline-stage .stage-num {
  font-family: var(--mono); font-size: .65rem; font-weight: 500;
  color: var(--accent); letter-spacing: .06em; text-transform: uppercase; margin-bottom: .35rem;
}
.pipeline-stage h4 { font-family: var(--serif); font-size: .95rem; font-weight: 500; margin-bottom: .3rem; }
.pipeline-stage p { font-size: .78rem; color: var(--fg-muted); line-height: 1.5; }
.pipeline-arrow { display: flex; align-items: center; padding: 0 .3rem; color: var(--accent); font-size: 1.2rem; flex-shrink: 0; }

/* ── METRIC TABLE ── */
.metric-table { width: 100%; border-collapse: collapse; margin: 1.2rem 0 1.5rem; font-size: .84rem; }
.metric-table th {
  font-weight: 500; text-align: left;
  padding: .65rem .8rem; background: var(--accent-light); color: var(--accent);
  border-bottom: 2px solid var(--accent); font-size: .78rem; letter-spacing: .03em;
}
.metric-table td { padding: .6rem .8rem; border-bottom: 1px solid var(--border); color: var(--fg-secondary); line-height: 1.5; }
@media (hover: hover) { .metric-table tr:hover td { background: rgba(31, 86, 70, .03); } }
.mono { font-family: var(--mono); }

/* ── CLONE BOX ── */
.clone-section {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem 1.5rem; margin: 1.5rem 0;
  display: flex; gap: 1rem; align-items: center; flex-wrap: wrap;
}
.clone-section .clone-url {
  flex: 1; min-width: 250px;
  font-family: var(--mono); font-size: .82rem;
  background: #f0efe9; padding: .55rem .85rem;
  border-radius: 4px; border: 1px solid var(--border);
  color: var(--fg-secondary); white-space: nowrap; overflow-x: auto;
}
.clone-btn {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .82rem; font-weight: 500; color: #fff; background: var(--accent);
  text-decoration: none; padding: .6rem 1.1rem; border: none; border-radius: 999px;
  cursor: pointer; font-family: var(--sans); white-space: nowrap;
  transition: background .15s, transform .1s ease-out;
}
.clone-btn:hover { background: var(--accent-strong); }
.clone-btn:active { transform: scale(.97); }
.clone-btn svg { width: 14px; height: 14px; }

/* ── FILE TREE ── */
.file-tree {
  background: #1e1e1e; color: #d4d4d4; border-radius: 6px;
  padding: 1.2rem 1.4rem; margin: 1.2rem 0 1.5rem;
  font-family: var(--mono); font-size: .8rem; line-height: 1.9;
  border: 1px solid #333; overflow-x: auto;
}
.file-tree .dir  { color: #9cdcfe; }
.file-tree .file { color: #d4d4d4; }
.file-tree .desc { color: #6a9955; }

/* ── SCREENSHOTS ── */
.screenshot {
  margin: 1.5rem 0 2rem;
  background: var(--bg-card); border: 1px solid var(--border);
  overflow: hidden;
}
.screenshot img { width: 100%; display: block; }
.screenshot figcaption {
  padding: .75rem 1.2rem; font-size: .8rem; color: var(--fg-muted);
  border-top: 1px solid var(--border); line-height: 1.5;
}

/* ── REFERENCES ── */
.ref-list { list-style: none; counter-reset: ref-counter; margin: 1rem 0; }
.ref-list li {
  counter-increment: ref-counter;
  padding: .6rem 0 .6rem 2.2rem; position: relative;
  font-size: .84rem; color: var(--fg-secondary); line-height: 1.6;
  border-bottom: 1px solid var(--border);
}
.ref-list li:last-child { border-bottom: none; }
.ref-list li::before {
  content: "[" counter(ref-counter) "]";
  position: absolute; left: 0;
  font-family: var(--mono); font-size: .72rem; color: var(--accent); font-weight: 500;
}
.ref-list a { color: var(--accent); text-decoration: none; }
.ref-list a:hover { text-decoration: underline; }

/* ── TALK CARD ── */
.talk-card {
  padding: 1.25rem 1.4rem; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 6px; margin-bottom: 1.2rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .article { padding-top: 2.25rem; }
  body { font-size: 16.5px; }
  .pipeline-diagram { flex-direction: column; }
  .pipeline-arrow { transform: rotate(90deg); justify-content: center; padding: .3rem 0; }
  .clone-section { flex-direction: column; align-items: stretch; }
  .clone-section .clone-url { min-width: 0; }
}

/* small print under figures and tables */
.prose p.note { font-size: .84rem; color: var(--fg-muted); line-height: 1.55; }