/* The content pages: How to play, About and Past puzzles. Blueprint, as in the game.
   The game itself does not load this file. */
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-display: swap; src: url("../fonts/plex-mono-400.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-display: swap; src: url("../fonts/plex-mono-500.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 700; font-display: swap; src: url("../fonts/plex-mono-700.woff2") format("woff2"); }
:root { --blue: #1552B0; --blue-deep: #11479A; --blue-ink: #0F3F87; --white: #fff; --miss-text: #C9D9F2; --miss-line: #9DB9E6; }
* { box-sizing: border-box; }
body {
  margin: 0; color: var(--white); font: 400 16px/1.6 "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  background-color: var(--blue);
  background-image: linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size: 20px 20px;
}
a { color: var(--white); }
:focus-visible { outline: 3px solid var(--white); outline-offset: 2px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

.site-head { border-bottom: 1.5px solid var(--white); background: var(--blue); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 24px; padding-top: 12px; padding-bottom: 10px; }
.site-head .logo { font-size: 20px; font-weight: 700; letter-spacing: .14em; text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 18px; font-size: 13px; font-weight: 500; text-transform: uppercase; letter-spacing: .06em; }
.site-nav a { padding: 10px 0; text-decoration: none; }
.site-nav a[aria-current] { text-decoration: underline; text-underline-offset: 5px; text-decoration-thickness: 2px; }
.site-nav a.play { background: var(--white); color: var(--blue-ink); padding: 10px 12px; border-radius: 2px; font-weight: 700; }

.layout { display: grid; gap: 32px; padding-top: 24px; padding-bottom: 48px; }
.kicker { margin: 0; font-size: 12px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--miss-text); }
h1 { margin: 4px 0 14px; font-size: 28px; line-height: 1.15; text-transform: uppercase; letter-spacing: .04em; text-wrap: balance; }
h1.plain { text-transform: none; letter-spacing: 0; }
h2 { margin: 34px 0 10px; font-size: 17px; text-transform: uppercase; letter-spacing: .08em; }
p, ul, ol { margin: 0 0 14px; }
li { margin-bottom: 6px; }
.lead { font-size: 18px; }
.box { border: 1.5px solid var(--white); border-radius: 2px; padding: 14px 16px; background: var(--blue); }
.btn { display: inline-block; min-height: 48px; padding: 12px 18px; background: var(--white); color: var(--blue-ink); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; text-decoration: none; border-radius: 2px; }
.cta { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.cta p { margin: 0; }

/* Ad boxes: with ads off they take no space. With ads on they keep a fixed height
   whether or not an ad arrives, so nothing jumps. One is filled per page. */
.adbox { display: flex; flex-direction: column; align-items: center; height: 265px; margin: 30px 0; }
.adbox[hidden] { display: none; }
.ad-label { display: block; font-size: 11px; line-height: 15px; letter-spacing: .1em; text-transform: uppercase; color: var(--miss-text); }
.ad-ph { display: grid; place-items: center; border: 1px dashed var(--miss-line); border-radius: 2px; background: var(--blue-deep); color: var(--miss-text); font-size: 12px; letter-spacing: .1em; }
aside .adbox { margin: 0; }
aside { display: flex; flex-direction: column; gap: 24px; }
.only-wide { display: none; }

/* A small board picture */
.board { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 5px; max-width: 460px; }
.tile { aspect-ratio: 1 / .95; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; border: 1.5px solid var(--white); border-radius: 2px; min-width: 0; }
.tile svg { width: 40%; max-width: 28px; aspect-ratio: 1; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.tile svg.solid { fill: currentColor; stroke: none; }
.tile span { font-size: 11px; font-weight: 500; line-height: 1; text-transform: uppercase; white-space: nowrap; }
.tile.fit { background: var(--white); color: var(--blue-ink); }
.tile.fit span { font-weight: 700; }
.tile.miss { background: var(--blue-deep); color: var(--miss-text); border: 1px dashed var(--miss-line); }

/* Lists of puzzles and facts */
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin: 0 0 14px; padding: 0; list-style: none; }
.facts li { border: 1.5px solid var(--white); border-radius: 2px; padding: 10px 12px; margin: 0; }
.facts b { display: block; font-size: 30px; line-height: 1; }
.facts span { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--miss-text); }
.plist { list-style: none; margin: 0; padding: 0; border-top: 1.5px solid var(--white); }
.plist li { margin: 0; border-bottom: 1px solid var(--miss-line); }
.plist a { display: grid; grid-template-columns: 4.2em 1fr; gap: 2px 12px; padding: 12px 2px; text-decoration: none; }
.plist .n { font-weight: 700; grid-row: span 2; font-size: 18px; }
.plist .meta { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--miss-text); }
.plist .rule { font-weight: 500; }
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 30px; }
dl.faq dt { font-weight: 700; margin-top: 22px; }
dl.faq dd { margin: 6px 0 0; }

.site-foot { border-top: 1.5px solid var(--white); font-size: 13px; }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 4px 20px; padding-top: 16px; padding-bottom: 28px; }
.site-foot a { padding: 8px 0; }

@media (min-width: 1000px) {
  .layout { grid-template-columns: minmax(0, 660px) 300px; justify-content: space-between; padding-top: 40px; }
  h1 { font-size: 36px; }
  .box.only-wide { display: flex; }
  .only-narrow { display: none !important; }
}

@media (max-width: 420px) {
  .site-nav { gap: 0 13px; font-size: 12px; letter-spacing: .03em; }
  .site-nav a.play { padding: 10px 10px; }
}
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 8px; top: 8px; z-index: 5; background: var(--white); color: var(--blue-ink); padding: 8px 12px; }
.note { font-size: 13px; color: var(--miss-text); }