:root {
  --paper: #F3F6F9;
  --card: #FFFFFF;
  --grid: #D9E4EF;
  --pencil: #3A4250;
  --x: #2448B3;
  --o: #CF3B35;
  --marker: #FFE14A;
  --marker-ink: #2A2508;
  --ink: #1F2530;
  --ink-soft: #5B6575;
  --hand: "Kalam", "Comic Sans MS", cursive;
  --body: "Atkinson Hyperlegible", system-ui, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1C2430;
    --card: #263143;
    --grid: #283445;
    --pencil: #B4BECC;
    --x: #8FB0FF;
    --o: #FF8C82;
    --marker: #F0D04A;
    --marker-ink: #231F06;
    --ink: #E6EBF2;
    --ink-soft: #9AA6B6;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  font: 18px/1.55 var(--body);
}

a { color: var(--x); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--x);
  outline-offset: 3px;
  border-radius: 6px;
}

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

/* Header */
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font: 700 30px/1 var(--hand);
}
.brand img { width: 40px; height: 40px; border-radius: 10px; }
.bar nav { display: flex; gap: 18px; font-size: 16px; }
.bar nav a { color: var(--ink); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
  padding: 40px 0 72px;
}
h1, h2 { font-family: var(--hand); font-weight: 700; line-height: 1.1; margin: 0; }
h1 { font-size: clamp(44px, 7vw, 76px); }
.lede { font-size: 21px; color: var(--ink); max-width: 30em; margin: 18px 0 26px; }
.sub { color: var(--ink-soft); font-size: 16px; margin: 14px 0 0; }

.play-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px 14px 18px;
  background: var(--marker);
  color: var(--marker-ink);
  border-radius: 14px;
  box-shadow: 0 4px 0 color-mix(in srgb, var(--marker) 60%, #000);
  font: 700 22px/1 var(--hand);
  text-decoration: none;
  transition: transform .08s, box-shadow .08s;
}
.play-button:active { transform: translateY(3px); box-shadow: 0 1px 0 color-mix(in srgb, var(--marker) 60%, #000); }
.play-button svg { width: 22px; height: 22px; }

/* Playable board */
.game {
  background: var(--card);
  border-radius: 20px;
  padding: 22px;
  box-shadow: 0 1px 0 var(--grid);
}
.game-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}
.score { font: 700 24px/1 var(--hand); }
.score .x { color: var(--x); }
.score .o { color: var(--o); }
.score .d { color: var(--ink-soft); }
.board-wrap { position: relative; aspect-ratio: 1; }
.board {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.board button {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  border-radius: 14px;
  display: grid;
  place-items: center;
}
.board button:disabled { cursor: default; }
.board button.hint { background: color-mix(in srgb, var(--marker) 80%, transparent); }
.board svg, .lines, .strike { width: 100%; height: 100%; overflow: visible; }
.lines, .strike { position: absolute; inset: 0; pointer-events: none; }
.lines path { stroke: var(--pencil); stroke-width: 2.2; fill: none; stroke-linecap: round; }
.mark { fill: none; stroke-linecap: round; stroke-width: 9; }
.mark.x { stroke: var(--x); }
.mark.o { stroke: var(--o); }
.draw { stroke-dasharray: 1; stroke-dashoffset: 1; animation: ink .28s ease-out forwards; }
.draw.second { animation-delay: .14s; }
.strike path { stroke-width: 3.2; fill: none; stroke-linecap: round; }
@keyframes ink { to { stroke-dashoffset: 0; } }
.status {
  min-height: 1.6em;
  margin: 10px 0 0;
  font-weight: 700;
  text-align: center;
}
.again {
  display: block;
  margin: 8px auto 0;
  border: 0;
  background: none;
  color: var(--x);
  font: 700 18px var(--body);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.again[hidden] { display: none; }

/* Feature rows */
.rows { display: grid; gap: 72px; padding-bottom: 80px; }
.row {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}
.row:nth-child(even) { grid-template-columns: minmax(0, 1fr) minmax(0, 260px); }
.row:nth-child(even) .shot { order: 2; }
.shot { margin: 0; }
.shot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 22px;
  box-shadow: 0 0 0 6px var(--card), 0 12px 30px rgb(0 0 0 / .12);
}
.row h2 { font-size: clamp(32px, 4vw, 42px); }
.row p { max-width: 34em; }
.quote {
  font: 400 22px/1.35 var(--hand);
  border-left: 6px solid var(--marker);
  padding-left: 14px;
}

.closing {
  text-align: center;
  padding: 56px 20px 72px;
}
.closing h2 { font-size: clamp(34px, 5vw, 52px); margin-bottom: 22px; }

/* Documents */
.doc { max-width: 42em; padding: 24px 0 72px; }
.doc h1 { font-size: clamp(40px, 6vw, 56px); }
.doc h2 { font-size: 28px; margin: 34px 0 6px; }
.doc .meta { color: var(--ink-soft); }
.doc li { margin: 4px 0; }

footer { border-top: 1px solid var(--grid); background: var(--paper); }
footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  padding-bottom: 28px;
  font-size: 15px;
  color: var(--ink-soft);
}
footer a { color: var(--ink-soft); }

@media (max-width: 760px) {
  body { font-size: 17px; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-top: 16px; }
  .row, .row:nth-child(even) { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .row:nth-child(even) .shot { order: 0; }
  .shot { max-width: 240px; }
  .bar nav { gap: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .draw { animation: none; stroke-dashoffset: 0; }
  .play-button { transition: none; }
}