/* Lineburst — the site.
 *
 * Colours are the game's own Classic theme, converted from
 * Blockrise/Game/BlockTheme.swift (`BlockTheme.classic`). Change a value
 * there, not here — the page is meant to read as the same product.
 */
:root {
  color-scheme: dark;
  --bg: #052B42;        /* classic.background */
  --panel: #0A3D59;     /* classic.boardFrame */
  --cell: #124F6E;      /* classic.emptyCell */
  --accent: #4FB8FA;    /* classic.accent */
  --gold: #FFD94D;      /* classic.gold */
  --ink: #F2F6FA;
  --ink-soft: #A9C2D4;
  --red: #F23830;
  --orange: #FF8A0A;
  --yellow: #FFC700;
  --green: #33C724;
  --cyan: #12C4D6;
  --blue: #296BFF;
  --purple: #A63BF5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 24px 96px;
  background:
    radial-gradient(1200px 620px at 50% -220px,
      color-mix(in srgb, var(--cell) 55%, transparent), transparent),
    var(--bg);
  color: var(--ink);
  font: 17px/1.65 ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont,
        "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main { max-width: 680px; margin: 0 auto; }

header { padding: 56px 0 8px; }

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--gold); }

.back {
  display: inline-block;
  margin: 40px 0 28px;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 15px;
}
.back:hover { color: var(--ink); }

h1 { font-size: 40px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 24px; margin: 44px 0 10px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 26px 0 6px; }

.lede { font-size: 20px; color: var(--ink-soft); margin: 0 0 8px; }
.meta { color: var(--ink-soft); font-size: 15px; margin: 0 0 32px; }

.mark {
  width: 84px; height: 84px; border-radius: 19px;
  display: block; margin-bottom: 22px;
  box-shadow: 0 10px 30px rgb(0 0 0 / 0.35);
}

.card {
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius: 16px;
  padding: 20px 22px;
  margin: 18px 0;
}
.card.big { font-size: 19px; }

.cta {
  display: inline-block;
  margin: 26px 0 4px;
  padding: 14px 26px;
  border-radius: 16px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
  text-decoration: none;
}
.cta:hover { background: var(--gold); color: var(--bg); }

/* An 8×8 board fragment: the piece about to complete two lines. */
.board {
  --gap: 4px;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--gap);
  max-width: 316px;
  margin: 30px 0 10px;
  padding: var(--gap);
  background: var(--panel);
  border-radius: 14px;
}
.board span {
  aspect-ratio: 1;
  border-radius: 12%;
  background: var(--cell);
}
.board span.f {
  background: linear-gradient(180deg,
    color-mix(in srgb, var(--c) 88%, white), var(--c));
  box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--c) 55%, black);
}
.board span.g { box-shadow: inset 0 0 0 2px var(--gold); }

ul { padding-left: 20px; }
li { margin: 7px 0; }

dt { font-weight: 600; margin-top: 18px; }
dd { margin: 4px 0 0; color: var(--ink-soft); }

footer {
  max-width: 680px; margin: 72px auto 0; padding-top: 24px;
  border-top: 1px solid color-mix(in srgb, var(--ink-soft) 22%, transparent);
  color: var(--ink-soft); font-size: 15px;
}
footer a { color: var(--ink-soft); }
footer a:hover { color: var(--ink); }