:root {
  color-scheme: light dark;
  --color-bg: #f7fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-strong: #1d4ed8;
  --color-border: #e2e8f0;
  --color-shadow: rgba(15, 23, 42, 0.08);
  --max-width: 42rem;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0b1220;
    --color-surface: #111a2e;
    --color-text: #e2e8f0;
    --color-muted: #94a3b8;
    --color-accent: #60a5fa;
    --color-accent-strong: #93c5fd;
    --color-border: #1e293b;
    --color-shadow: rgba(0, 0, 0, 0.35);
  }
}

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

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--color-accent-strong);
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: 0 0 var(--radius) var(--radius);
}

.skip-link:focus {
  left: 0;
}

.site-header {
  padding: 1.5rem 1.25rem 0.5rem;
  display: flex;
  justify-content: center;
}

.wordmark {
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-muted);
}

.wordmark a {
  color: inherit;
}

.wordmark__dot {
  color: var(--color-accent);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  flex: 1;
}

.message {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem;
  margin: 1rem 0;
  box-shadow: 0 1px 2px var(--color-shadow);
}

.message h1,
.message h2 {
  margin: 0 0 0.5rem;
  line-height: 1.2;
}

.message h1 {
  font-size: clamp(1.6rem, 2.5vw + 1rem, 2.25rem);
}

.message h2 {
  font-size: clamp(1.35rem, 2vw + 0.9rem, 1.85rem);
  font-weight: 600;
}

.message p {
  margin: 0;
  color: var(--color-text);
  font-size: 1.05rem;
}

.game {
  margin: 2.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--color-border);
  text-align: center;
}

.game__heading {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-muted);
  margin: 0 0 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.game__subheading {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-muted);
}

.game__intro {
  margin: 0 0 1rem;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.game__stage {
  display: flex;
  justify-content: center;
}

#slalom-canvas {
  display: block;
  width: min(320px, 100%);
  height: auto;
  aspect-ratio: 320 / 480;
  background: linear-gradient(180deg, #eef4ff 0%, #ffffff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px var(--color-shadow);
  touch-action: none;
}

@media (prefers-color-scheme: dark) {
  #slalom-canvas {
    background: linear-gradient(180deg, #1a2747 0%, #0f1a35 100%);
  }
}

.game__controls {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin: 0.75rem 0 0.25rem;
}

.game__button {
  font: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.45rem 1.1rem;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease,
    border-color 0.15s ease;
}

.game__button:hover:not(:disabled),
.game__button:focus-visible:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent-strong);
}

.game__button:disabled {
  opacity: 0.5;
  cursor: default;
}

.game__status {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  color: var(--color-muted);
  font-size: 0.95rem;
  margin: 0.5rem 0 0.25rem;
}

.game__status strong {
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.game__hint {
  margin: 0.25rem 0 0;
  color: var(--color-muted);
  font-size: 0.85rem;
}

kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", monospace;
  font-size: 0.8em;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  box-shadow: 0 1px 0 var(--color-border);
}

.site-footer {
  text-align: center;
  padding: 1.25rem;
  color: var(--color-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--color-border);
  background: transparent;
}

.site-footer p {
  margin: 0;
}

.prose h1 {
  font-size: clamp(1.6rem, 2.5vw + 1rem, 2.25rem);
  margin: 0 0 1rem;
}

.prose h2 {
  font-size: 1.2rem;
  margin: 1.5rem 0 0.5rem;
}

.prose p {
  margin: 0 0 0.75rem;
}