:root {
  --page: #1b1f24;
  --panel: #262c34;
  --phone: #2f3a48;
  --phone-edge: #3d4a5b;
  --bezel: #12161b;
  --ink: #e9ece4;
  --muted: #a3ab9f;
  --accent: #c7f0d8;
  --accent-ink: #43523d;
  --focus: #ffd866;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.masthead {
  text-align: center;
}

.masthead h1 {
  margin: 0;
  font-family: "Silkscreen", monospace;
  font-weight: 700;
  font-size: clamp(28px, 6vw, 48px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--accent);
  font-style: italic;
  transform: skewX(-8deg);
}

.masthead p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* The handset. */
.phone {
  background: linear-gradient(180deg, var(--phone-edge), var(--phone) 18%);
  border-radius: 28px;
  padding: 18px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 100%;
}

.bezel {
  background: var(--bezel);
  border-radius: 14px;
  padding: 12px;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
  max-width: 100%;
}

.screen {
  position: relative;
  background: var(--lcd-bg);
  max-width: 100%;
  overflow: hidden;
}

.screen canvas {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.screen-btn {
  position: absolute;
  left: 50%;
  bottom: 6%;
  transform: translateX(-50%);
  z-index: 2;
  font-family: "Silkscreen", monospace;
  font-size: clamp(12px, 2.4vw, 18px);
  padding: 6px 18px;
  color: var(--accent);
  background: rgba(20, 24, 20, 0.82);
  border: 2px solid var(--accent);
  border-radius: 4px;
  cursor: pointer;
}

.screen-btn.inline {
  position: static;
  transform: none;
}

.screen-btn:hover {
  background: var(--accent);
  color: var(--accent-ink);
}

.pause-card {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  justify-content: center;
  gap: 10px;
  background: rgba(10, 12, 10, 0.6);
}

.pause-card p {
  flex-basis: 100%;
  margin: 0 0 4px;
  text-align: center;
  font-family: "Silkscreen", monospace;
  font-size: clamp(16px, 4vw, 32px);
  color: var(--accent);
}

.topscore {
  margin: 0;
  font-family: "Silkscreen", monospace;
  font-size: 14px;
  color: var(--accent);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.toolbar button {
  font: inherit;
  font-size: 13px;
  color: var(--ink);
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  padding: 6px 14px;
  min-height: 34px;
  cursor: pointer;
}

.toolbar button:hover:not(:disabled) {
  border-color: var(--accent);
}

.toolbar button:disabled {
  opacity: 0.45;
  cursor: default;
}

button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* On-screen controls. */
.touchpad {
  width: 100%;
  max-width: 560px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.dpad {
  position: relative;
  width: 148px;
  height: 148px;
  border-radius: 50%;
  background: radial-gradient(circle, #222a33 0 30%, #1a2028 31%);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255, 255, 255, 0.06);
  touch-action: none;
  flex: none;
}

.arrow {
  position: absolute;
  width: 0;
  height: 0;
  border: 11px solid transparent;
}

.arrow.up {
  top: 12px;
  left: calc(50% - 11px);
  border-bottom: 14px solid var(--muted);
  border-top-width: 0;
}

.arrow.down {
  bottom: 12px;
  left: calc(50% - 11px);
  border-top: 14px solid var(--muted);
  border-bottom-width: 0;
}

.arrow.left {
  left: 12px;
  top: calc(50% - 11px);
  border-right: 14px solid var(--muted);
  border-left-width: 0;
}

.arrow.right {
  right: 12px;
  top: calc(50% - 11px);
  border-left: 14px solid var(--muted);
  border-right-width: 0;
}

.actions {
  display: flex;
  gap: 14px;
  align-items: flex-end;
}

.pad-btn {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: none;
  font-family: "Silkscreen", monospace;
  font-size: 12px;
  color: var(--accent-ink);
  background: var(--accent);
  box-shadow: 0 4px 0 #8fb39d, 0 6px 14px rgba(0, 0, 0, 0.4);
  touch-action: none;
  cursor: pointer;
}

.pad-btn.special {
  width: 62px;
  height: 62px;
  background: #e2d9a6;
  box-shadow: 0 4px 0 #b0a777, 0 6px 14px rgba(0, 0, 0, 0.4);
  margin-bottom: 26px;
}

.pad-btn.back {
  width: 48px;
  height: 48px;
  font-size: 10px;
  background: #b9bcb3;
  box-shadow: 0 4px 0 #85887f, 0 6px 14px rgba(0, 0, 0, 0.4);
  margin-bottom: 52px;
}

.pad-btn:active,
.pad-btn.on {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #8fb39d;
}

.help {
  width: 100%;
  max-width: 640px;
  background: var(--panel);
  border-radius: 14px;
  padding: 16px 20px;
}

.help h2 {
  margin: 0 0 10px;
  font-family: "Silkscreen", monospace;
  font-size: 18px;
  color: var(--accent);
}

.help dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 16px;
  margin: 0 0 12px;
}

.help dt {
  color: var(--muted);
}

.help dd {
  margin: 0;
}

.help p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

kbd {
  font: 13px/1 ui-monospace, "Cascadia Mono", Consolas, monospace;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom-width: 2px;
  background: rgba(0, 0, 0, 0.25);
}

footer {
  max-width: 640px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

footer a {
  color: var(--accent);
}

@media (max-width: 520px) {
  .phone {
    padding: 12px;
    border-radius: 20px;
  }
  .bezel {
    padding: 8px;
  }
  .dpad {
    width: 132px;
    height: 132px;
  }
}