:root {
  color-scheme: light;
  --paper: #eae6f4;
  --ink: #302640;
  --muted: #655b75;
  --violet: #6250ac;
  --line: #cdc4dd;
  --surface: #f8f6fc;
  --control-line: #8b7c9f;
  --on-violet: #fff;
  --art-shadow: #c7bddf;
  --art-dots: #8c78bd;
  --art-highlight: #9986ce;
  --art-shade: #493888;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-synthesis: none;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #211a2b;
  --ink: #f0eaf9;
  --muted: #bdb0ce;
  --violet: #bea4f4;
  --line: #51415f;
  --surface: #30263f;
  --control-line: #8d7aa4;
  --on-violet: #211a2b;
  --art-shadow: #130f1b;
  --art-dots: #a18ac7;
  --art-highlight: #d1bdf9;
  --art-shade: #8063bb;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --paper: #211a2b;
    --ink: #f0eaf9;
    --muted: #bdb0ce;
    --violet: #bea4f4;
    --line: #51415f;
    --surface: #30263f;
    --control-line: #8d7aa4;
    --on-violet: #211a2b;
    --art-shadow: #130f1b;
    --art-dots: #a18ac7;
    --art-highlight: #d1bdf9;
    --art-shade: #8063bb;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 2rem; }
body { margin: 0; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 5px; }
:where(a, select, button):focus-visible { outline: 3px solid var(--violet); outline-offset: 5px; border-radius: 3px; }
::selection { background: var(--violet); color: var(--on-violet); }

.page { max-width: 1600px; margin-inline: auto; padding: 0 clamp(20px, 5vw, 88px); }
.site-header { min-height: 112px; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 28px; padding-block: 18px; }
.site-header--error { grid-template-columns: 1fr auto; }
.home-link { display: inline-flex; gap: 10px; align-items: center; justify-self: start; min-height: 44px; font-size: 17px; font-weight: 600; text-decoration: none; }
.home-link svg { flex-shrink: 0; width: 34px; height: 28px; }
.text-link { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; font-size: 15px; }
.game-link { justify-self: end; }
.game-link > [aria-hidden] { font-size: 21px; }
.preferences-controls { display: flex; align-items: end; gap: 10px; }
.preference-control { display: grid; gap: 5px; min-width: 0; font-size: 12px; color: var(--muted); }
.preference-control select { width: 100%; min-height: 44px; min-width: 108px; padding: 8px 10px; border: 1px solid var(--control-line); border-radius: 8px; background-color: var(--paper); color: var(--ink); font: inherit; font-size: 14px; cursor: pointer; }
.hero { min-height: clamp(380px, 46svh, 550px); display: grid; grid-template-columns: 1.35fr 1fr; align-items: center; gap: 0; padding: 40px 0 48px; }
.hero-copy { position: relative; z-index: 1; min-width: 0; }
h1 { margin: 0 0 26px; font-size: clamp(80px, 10.7vw, 164px); line-height: .92; letter-spacing: -.055em; font-weight: 700; }
.period { color: var(--violet); }
.intro { font-size: clamp(22px, 2.3vw, 34px); line-height: 1.35; letter-spacing: -.045em; margin: 0; }
.forge { width: 100%; transform: rotate(-7deg); }
.forge-art { width: 100%; height: auto; display: block; }
.game-section { border-top: 1px solid var(--line); padding: 36px 0 64px; min-width: 0; }
.game-heading { display: flex; flex-wrap: wrap; align-items: baseline; column-gap: 28px; row-gap: 10px; margin-bottom: 24px; }
h2 { font-size: clamp(25px, 2.6vw, 38px); letter-spacing: -.045em; line-height: 1.2; font-weight: 500; margin: 0; }
.game-heading p { color: var(--muted); font-size: 17px; line-height: 1.6; max-width: 48ch; margin: 0; }
#snake-game { min-width: 0; max-width: 100%; }

.error-page { min-height: 100svh; display: flex; flex-direction: column; }
.error-main { flex: 1; display: grid; align-content: center; justify-items: start; padding: 64px 0; }
.error-main h1 { font-size: clamp(56px, 12vw, 144px); margin-bottom: 24px; overflow-wrap: anywhere; }
.error-main p { color: var(--muted); font-size: 22px; line-height: 1.4; max-width: 34ch; margin: 0 0 22px; }

@media (max-width: 900px) {
  .site-header { gap: 18px; }
  .home-link { font-size: 15px; gap: 6px; }
  .hero { min-height: 340px; padding: 28px 0 40px; }
  h1 { font-size: clamp(72px, 10.7vw, 96px); }
  .intro { font-size: 25px; }
}

@media (max-width: 700px) {
  .site-header { grid-template-columns: 1fr auto; row-gap: 12px; min-height: 0; }
  .preferences-controls { grid-column: 1 / -1; justify-self: end; }
  .hero { min-height: 0; grid-template-columns: 1fr; padding: 36px 0 28px; }
  h1 { font-size: clamp(64px, 15.5vw, 100px); margin-bottom: 22px; }
  .intro { font-size: 24px; }
  .forge { width: min(300px, 78%); justify-self: end; margin-top: -30px; }
  .game-section { padding: 28px 0 44px; }
  .game-heading { margin-bottom: 20px; }
  .game-heading p { font-size: 16px; }
  .error-main { padding: 44px 0; }
}

@media (max-width: 400px) {
  .site-header { column-gap: 10px; }
  .home-link { font-size: 14px; }
  .home-link svg { width: 26px; }
  .game-link { font-size: 13px; gap: 5px; }
  .preferences-controls { width: 100%; }
  .preference-control { flex: 1; }
  h1 { font-size: 16vw; }
  .intro { font-size: 21px; }
  .forge { width: 74%; margin-top: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}