/* Tokens mirror the Vec Labs design system (see BRAND.md). Change the system first. */
:root {
  color-scheme: light dark;
  --panel: #e6e7e2;
  --panel-raised: #f3f4f0;
  --ink: #1b1e21;
  --ink-muted: #555b61;
  --rule: #c5c8c2;
  --jack-red: #b8321b;
  --focus: var(--jack-red);

  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --space-xs: 8px;
  --space-s: 16px;
  --space-m: 32px;
  --space-l: 64px;

  --measure: 68ch;
  --page: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --panel: #16181a;
    --panel-raised: #212427;
    --ink: #e4e5e0;
    --ink-muted: #9da3a8;
    --rule: #33373b;
    --jack-red: #ee5f3c;
  }
}

@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-display: swap; src: url("../fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-display: swap; src: url("../fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-display: swap; src: url("../fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-display: swap; src: url("../fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); }

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--panel);
  color: var(--ink);
  font: 400 17px/26px var(--font-sans);
  -webkit-text-size-adjust: 100%;
}

.page {
  max-width: calc(var(--page) + 2 * var(--space-m));
  margin: 0 auto;
  padding-left: max(var(--space-s), env(safe-area-inset-left, 0px));
  padding-right: max(var(--space-s), env(safe-area-inset-right, 0px));
}

a { color: inherit; text-decoration: underline 2px var(--jack-red); text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

h1, h2 { margin: 0; text-wrap: balance; }
p { margin: 0; max-width: var(--measure); }

.label {
  font: 500 12px/16px var(--font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* Masthead */
.masthead { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-s) var(--space-m); padding-block: var(--space-m); }
.wordmark { display: inline-block; color: var(--ink); }
.wordmark svg { display: block; width: 168px; height: auto; }
.nav { display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-m); }
.nav a { font: 500 12px/16px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; text-decoration: none; }
.nav a:hover { text-decoration: underline 1px var(--ink-muted); text-underline-offset: 4px; }

/* Sections */
section { display: grid; gap: var(--space-s); padding-block: var(--space-l); border-top: 1px solid var(--rule); }
.hero { border-top: 0; padding-top: var(--space-m); }
.hero h1 { font-size: clamp(34px, 7vw, 48px); line-height: 1.08; font-weight: 600; letter-spacing: -.01em; }
.hero .lede { font-size: 19px; line-height: 28px; }
h2 { font-size: 28px; line-height: 34px; font-weight: 600; }

/* Block diagram */
.diagram { min-width: 0; margin: 0; padding: var(--space-m) var(--space-s); background: var(--panel-raised); overflow-x: auto; }
.diagram svg { display: block; width: 100%; min-width: 600px; height: auto; }
.diagram .box { fill: var(--panel-raised); stroke: var(--ink-muted); stroke-width: 1.5; }
.diagram .base { fill: var(--panel); stroke: var(--ink); stroke-width: 2; }
.diagram .bus { stroke: var(--ink-muted); stroke-width: 1.5; }
.diagram .stop { stroke: var(--jack-red); stroke-width: 2.5; fill: none; }
.diagram .t { fill: var(--ink); font: 500 12px var(--font-mono); letter-spacing: .08em; }
.diagram .s { fill: var(--ink-muted); font: 400 13px var(--font-sans); }
.diagram .r { fill: var(--jack-red); font: 500 11px var(--font-mono); letter-spacing: .08em; }

/* Parts list */
.parts { display: grid; gap: var(--space-s); margin: var(--space-xs) 0 0; }
.parts div { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: var(--space-s); }
.parts dt { padding-top: 5px; }
.parts dd { margin: 0; max-width: var(--measure); }

@media (max-width: 560px) {
  .parts div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
}

/* Status badge, also used for tags */
.badge { display: inline-block; padding: 2px 8px; border: 1px solid currentColor; border-radius: 2px; font: 500 12px/16px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; text-decoration: none; }
.tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); }

/* Board renders and photos */
.render { margin: 0; padding: var(--space-s); background: var(--panel-raised); }
.render img { display: block; width: 100%; height: auto; }
.render figcaption { margin-top: var(--space-xs); }

/* Card tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-s); margin: 0; padding: 0; list-style: none; }
.tile { display: grid; gap: 4px; align-content: start; height: 100%; padding: var(--space-s); background: var(--panel-raised); text-decoration: none; }
.tile:hover strong { text-decoration: underline 2px var(--jack-red); text-underline-offset: 3px; }
.tile-image { display: block; aspect-ratio: 16 / 10; margin-bottom: var(--space-xs); }
.tile-image img { display: block; width: 100%; height: 100%; object-fit: contain; }
.tile-code { display: grid; place-items: center; height: 100%; font: 500 48px/1 var(--font-mono); color: var(--rule); }
.tile strong { font-size: 19px; line-height: 26px; font-weight: 600; }
.tile > span:last-child { font-size: 15px; line-height: 22px; color: var(--ink-muted); }

/* Post lists */
.posts { display: grid; gap: var(--space-m); margin: 0; padding: 0; list-style: none; }
.posts li { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: var(--space-s); align-items: start; }
.posts li:not(:has(.cover)) { grid-template-columns: minmax(0, 1fr); }
.posts .cover { display: block; aspect-ratio: 16 / 10; background: var(--panel-raised); }
.posts .cover img { display: block; width: 100%; height: 100%; object-fit: contain; }
.posts h3 { margin: 2px 0 4px; font-size: 21px; line-height: 28px; font-weight: 600; }
@media (max-width: 560px) {
  .posts li { grid-template-columns: minmax(0, 1fr); }
}

/* Markdown bodies: card pages and posts */
.prose { display: block; }
.prose > * + * { margin-top: var(--space-s); }
.prose h2 { margin-top: var(--space-l); }
.prose h2:first-child { margin-top: 0; }
.prose ul { margin: var(--space-s) 0 0; padding-left: 1.25em; max-width: var(--measure); }
.prose li + li { margin-top: var(--space-xs); }
.prose img { display: block; width: 100%; height: auto; background: var(--panel-raised); }
/* Images on adjacent lines share a paragraph; lay them out as a grid. */
.prose p:has(> img + img) { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-xs); max-width: none; }

/* Footer */
footer { display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-m); padding-block: var(--space-m) var(--space-l); border-top: 1px solid var(--rule); font-size: 14px; line-height: 20px; color: var(--ink-muted); }