/* Sparkobotics Blog. Same tokens as the camp site (DESIGN.md): cream paper, ink borders, hard shadows. */
:root {
  --paper: #f6f1e4;
  --card: #ffffff;
  --ink: #14231b;
  --ink-soft: #3d4a42;
  --primary: #1f6b3a;
  --primary-dark: #154d29;
  --marker: #f5b72c;
  --lime: #c7f23a;
  --sky: #cfe6f2;
  --led-soft: #fff0b8;
  --display: "Bricolage Grotesque", system-ui, sans-serif;
  --text: "Figtree", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--text);
}
img, svg { max-width: 100%; display: block; }
a { color: var(--primary); text-underline-offset: 3px; text-decoration-thickness: 2px; }
a:hover { color: var(--primary-dark); }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 44rem; margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .wrap, .narrow { padding: 0 24px; } }

.skip { position: absolute; left: -999px; top: 8px; background: var(--card); padding: 8px 12px; border: 2px solid var(--ink); border-radius: 8px; }
.skip:focus { left: 8px; }

/* Header */
.site-head { border-bottom: 3px solid var(--ink); background: var(--paper); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { width: 40px; height: 40px; }
.brand-name { font: 800 22px/1 var(--display); letter-spacing: -0.03em; }
.brand-name span { color: var(--primary); }
.brand-tag { display: block; font: 700 12px/1 var(--text); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); margin-top: 4px; }
.head-nav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.head-nav a { color: var(--ink); font-weight: 700; text-decoration: none; }
.head-nav a:hover { text-decoration: underline; }

/* Buttons */
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 12px; font-weight: 700; text-decoration: none;
  border: 2px solid var(--ink); transition: transform 150ms, box-shadow 150ms;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 0 var(--primary-dark); border-color: var(--primary-dark); }
.btn-primary:hover { color: #fff; }
.btn-marker { background: var(--marker); color: var(--ink); box-shadow: 0 4px 0 #b9850f; border-color: #b9850f; }
.btn-marker:hover { color: var(--ink); }
.btn-plain { background: var(--card); color: var(--ink); box-shadow: 0 4px 0 var(--ink); }
.btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--ink); }

/* Type */
h1, h2, h3 { font-family: var(--display); letter-spacing: -0.03em; line-height: 1.08; margin: 0; }
h1 { font-weight: 800; font-size: clamp(2.1rem, 5.5vw, 3.6rem); }
h2 { font-weight: 800; font-size: clamp(1.5rem, 3.4vw, 2rem); margin-top: 2.6rem; }
h3 { font-weight: 700; font-size: 1.3rem; }
.eyebrow { font: 700 14px/1.2 var(--text); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.highlight { background: var(--lime); padding: 0 0.12em; border-radius: 6px; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 38rem; }

/* Home hero */
.hero { padding-top: 56px; padding-bottom: 40px; }
.hero h1 { max-width: 46rem; margin-top: 12px; }
.hero .lede { margin-top: 18px; }

/* Post cards */
.posts { display: grid; gap: 24px; padding-bottom: 64px; }
@media (min-width: 720px) { .posts { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1080px) { .posts { grid-template-columns: 1fr 1fr 1fr; } }
.card {
  background: var(--card); border: 3px solid var(--ink); border-radius: 16px; box-shadow: 6px 6px 0 var(--ink);
}
.post-card { display: flex; flex-direction: column; text-decoration: none; color: var(--ink); overflow: hidden; transition: transform 150ms, box-shadow 150ms; }
.post-card:hover { color: var(--ink); transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--ink); }
.post-card .art { border-bottom: 3px solid var(--ink); background: var(--sky); aspect-ratio: 16 / 7; display: grid; place-items: center; }
.post-card .art.warm { background: var(--led-soft); }
.post-card .body { padding: 22px 22px 26px; display: flex; flex-direction: column; gap: 10px; }
.post-card h2 { margin: 0; font-size: 1.6rem; }
.post-card p { margin: 0; color: var(--ink-soft); }
.post-card .more { font-weight: 700; color: var(--primary); margin-top: 4px; }

/* Facts strip */
.strip { background: var(--ink); color: var(--paper); padding: 40px 0; }
.strip h2 { margin: 0; color: var(--paper); font-size: 1.6rem; }
.strip p { max-width: 42rem; color: var(--paper); }
.strip .lime { color: var(--lime); }
.strip a.btn { margin-top: 8px; }

/* Article */
.article-head { padding-top: 44px; padding-bottom: 8px; }
.article-head h1 { margin-top: 10px; }
.meta { margin-top: 16px; font-size: 15px; color: var(--ink-soft); }
.crumbs { font-size: 15px; }
.crumbs a { color: var(--ink-soft); }
article .narrow > p, article .narrow > ul, article .narrow > ol { max-width: 42rem; }
article ul, article ol { padding-left: 1.3rem; }
article li { margin: 6px 0; }
article h3 { margin-top: 1.8rem; }
.answer { padding: 20px 22px; margin: 28px 0; background: var(--led-soft); }
.answer p { margin: 0.4rem 0 0; }
.answer p:first-child { margin-top: 0; }

.toc { padding: 18px 22px; margin: 28px 0; }
.toc ol { margin: 8px 0 0; }

.pick { padding: 22px; margin: 22px 0; }
.pick .num { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 2px solid var(--ink); border-radius: 10px; background: var(--paper); font: 800 18px/1 var(--display); margin-bottom: 10px; }
.pick h3 { margin: 0 0 6px; }
.pick p { margin: 8px 0; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 4px; padding: 0; list-style: none; }
.tags li { margin: 0; font: 700 13px/1 var(--text); letter-spacing: 0.06em; text-transform: uppercase; border: 2px solid var(--ink); border-radius: 999px; padding: 6px 10px; background: var(--paper); }

.disclosure { padding: 22px; margin: 32px 0; background: var(--sky); }
.disclosure h3 { margin: 4px 0 8px; }
.disclosure p { margin: 8px 0; }

.table-wrap { overflow-x: auto; margin: 22px 0; border: 3px solid var(--ink); border-radius: 16px; background: var(--card); box-shadow: 6px 6px 0 var(--ink); }
table { border-collapse: collapse; width: 100%; min-width: 620px; font-size: 15.5px; }
th, td { text-align: left; vertical-align: top; padding: 11px 14px; border-bottom: 2px solid #e4dccb; }
thead th { background: var(--ink); color: var(--paper); font-family: var(--display); font-size: 1rem; }
tbody th { font-weight: 700; width: 9.5rem; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }

.note { font-size: 15px; color: var(--ink-soft); }
.sources { font-size: 15px; }
.sources li { word-break: break-word; }
.more-reading { margin: 44px 0 64px; padding: 22px; }
.more-reading h2 { margin: 0 0 6px; font-size: 1.4rem; }

/* Footer */
.site-foot { border-top: 3px solid var(--ink); padding: 32px 0 44px; font-size: 15px; }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; }
.site-foot p { margin: 4px 0; max-width: 34rem; color: var(--ink-soft); }
.site-foot nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-foot nav a { color: var(--ink); font-weight: 700; }

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

@media (max-width: 560px) {
  .site-head .wrap { min-height: 0; }
  .head-nav { gap: 6px 14px; font-size: 15px; }
  .head-nav .btn { padding: 6px 12px; }
}