@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/fonts/space-grotesk-latin-ext.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/fonts/space-grotesk-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-regular-latin-ext.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

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

@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-medium-latin-ext.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

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

:root {
  color-scheme: dark;
  --color-void: #08111c;
  --color-void-deep: #050b12;
  --color-panel: #0e1a27;
  --color-panel-raised: #142231;
  --color-line: #293c4d;
  --color-grid: #1b2c3a;
  --color-text: #f1f6f8;
  --color-muted: #8ea4b4;
  --color-signal: #8fc8df;
  --color-signal-strong: #b9e5f3;
  --color-amber: #f2bd5b;
  --color-snake: #71a9c2;
  --color-snake-head: #c3e8f3;
  --color-focus: #f2bd5b;
  --color-shadow: rgb(0 0 0 / 28%);
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
  --radius-small: 0.5rem;
  --radius-medium: 0.875rem;
  --radius-large: 1.25rem;
  --page-width: 76rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  background: var(--color-void);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 80% 10%, color-mix(in srgb, var(--color-signal) 10%, transparent), transparent 30rem),
    linear-gradient(145deg, var(--color-void-deep), var(--color-void));
  color: var(--color-text);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 0.1875rem solid var(--color-focus);
  outline-offset: 0.1875rem;
}

.page-shell {
  display: flex;
  width: min(100% - 3rem, var(--page-width));
  min-height: 100vh;
  margin: 0 auto;
  flex-direction: column;
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.site-header {
  min-height: 5.5rem;
  border-bottom: 0.0625rem solid var(--color-line);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-weight: 500;
  text-decoration: none;
}

.wordmark-mark {
  display: grid;
  width: 2.125rem;
  height: 2.125rem;
  place-items: center;
  border: 0.0625rem solid var(--color-signal);
  border-radius: var(--radius-small);
  color: var(--color-signal-strong);
  letter-spacing: -0.08em;
}

.build-state {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-muted);
  text-transform: uppercase;
}

.status-light {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-amber);
  box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--color-amber) 15%, transparent);
}

.content-grid {
  display: grid;
  flex: 1;
  grid-template-columns: minmax(0, 0.9fr) minmax(24rem, 1.1fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  padding: clamp(3.5rem, 8vh, 7rem) 0;
}

.intro {
  max-width: 36rem;
}

.kicker,
.game-label,
.build-note-label,
.scoreboard dt,
.game-help {
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.kicker {
  margin-bottom: 1.5rem;
  color: var(--color-signal);
}

h1,
h2,
p {
  text-wrap: pretty;
}

h1 {
  margin: 0;
  font-size: clamp(3.5rem, 7vw, 6.75rem);
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 0.9;
}

.intro-copy {
  max-width: 29rem;
  margin: 2rem 0 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.65;
}

.build-note {
  display: grid;
  max-width: 29rem;
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 0.0625rem solid var(--color-line);
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  align-items: baseline;
}

.build-note-value {
  font-size: 0.9375rem;
}

.game-card {
  width: 100%;
  max-width: 36rem;
  justify-self: end;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 0.0625rem solid var(--color-line);
  border-radius: var(--radius-large);
  background: color-mix(in srgb, var(--color-panel) 88%, transparent);
  box-shadow: 0 1.5rem 5rem var(--color-shadow);
}

.game-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.25rem 0.25rem 1.25rem;
}

.game-header h2 {
  margin: 0.3rem 0 0;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.035em;
}

.scoreboard {
  display: flex;
  margin: 0;
  gap: 1.5rem;
}

.scoreboard div {
  min-width: 3.5rem;
}

.scoreboard dd {
  margin: 0.25rem 0 0;
  color: var(--color-signal-strong);
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 500;
}

.game-surface {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  border: 0.0625rem solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-void-deep);
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.game-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 2rem;
  background: color-mix(in srgb, var(--color-void-deep) 75%, transparent);
  text-align: center;
  pointer-events: none;
}

.game-overlay[hidden] {
  display: none;
}

.game-overlay p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.game-overlay span {
  margin-top: 0.625rem;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.game-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1rem;
}

.button,
.direction {
  min-height: 2.875rem;
  border: 0.0625rem solid transparent;
  border-radius: var(--radius-small);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.button-primary {
  background: var(--color-signal-strong);
  color: var(--color-void-deep);
}

.button-secondary,
.direction {
  border-color: var(--color-line);
  background: var(--color-panel-raised);
  color: var(--color-text);
}

.button:not(:disabled):hover,
.direction:hover {
  border-color: var(--color-signal);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.direction-pad {
  display: none;
}

.game-help {
  margin-top: 1rem;
  line-height: 1.6;
  text-align: center;
}

.site-footer {
  min-height: 4.5rem;
  justify-content: flex-start;
  gap: 0.75rem;
  border-top: 0.0625rem solid var(--color-line);
  color: var(--color-muted);
}

.footer-separator {
  width: 0.25rem;
  height: 0.25rem;
  border-radius: 50%;
  background: var(--color-line);
}

.visually-hidden {
  position: absolute;
  width: 0.0625rem;
  height: 0.0625rem;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.noscript-message {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  margin: 0;
  padding: 1rem;
  border: 0.0625rem solid var(--color-line);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  color: var(--color-text);
  text-align: center;
}

@media (max-width: 56rem) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  .intro,
  .game-card {
    max-width: 42rem;
  }

  .game-card {
    justify-self: start;
  }
}

@media (max-width: 42rem) {
  .page-shell {
    width: min(100% - 2rem, var(--page-width));
  }

  .site-header {
    min-height: 4.75rem;
  }

  .wordmark-mark {
    width: 2rem;
    height: 2rem;
  }

  .build-state {
    font-size: 0;
    gap: 0;
  }

  .content-grid {
    padding: 3.5rem 0;
  }

  h1 {
    font-size: clamp(3.25rem, 17vw, 5.25rem);
  }

  .build-note {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .game-card {
    padding: 0.75rem;
    border-radius: var(--radius-medium);
  }

  .game-header {
    padding: 0.5rem 0.25rem 1rem;
  }

  .scoreboard {
    gap: 0.75rem;
  }

  .scoreboard div {
    min-width: 3rem;
  }

  .game-actions {
    grid-template-columns: 1fr;
  }

  .direction-pad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin: 0.75rem auto 0;
  }

  .direction-up {
    grid-column: 2;
  }

  .direction-left {
    grid-column: 1;
    grid-row: 2;
  }

  .direction-down {
    grid-column: 2;
    grid-row: 2;
  }

  .direction-right {
    grid-column: 3;
    grid-row: 2;
  }

  .site-footer {
    flex-wrap: wrap;
    padding: 1rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto;
  }
}