:root {
  --void: #07040f;
  --deep: #0f0a24;
  --ink: #e8e4ff;
  --muted: #a99fd6;
  --cyan: #62f4f8;
  --pink: #ff3fa4;
  --yellow: #ffd23f;
  --line: #2a1f5c;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { background: var(--void); -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--void); color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
body.playing { overflow: hidden; overscroll-behavior: none; }
a { color: var(--cyan); }
a:hover { color: #c9feff; }
:focus-visible { outline: 2px solid var(--yellow); outline-offset: 2px; }

/* ------------------------------------------------------------ stage */
.stage {
  position: relative; overflow: hidden;
  width: 100%; height: 100vh; height: 100svh;
  background: var(--void);
  user-select: none; -webkit-user-select: none; -webkit-touch-callout: none;
  touch-action: pan-y;
}
.stage.active { touch-action: none; height: 100vh; height: 100dvh; }
body:fullscreen .stage, .stage:fullscreen { height: 100vh; }
#game {
  position: absolute; display: block;
  image-rendering: pixelated; image-rendering: crisp-edges;
  outline: none;
}

/* ------------------------------------------------------------ buttons */
button, .button {
  font: 600 16px/1 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  letter-spacing: 0.04em;
  color: var(--ink); background: var(--deep);
  border: 2px solid var(--cyan); border-radius: 0;
  min-height: 44px; padding: 12px 22px;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 0 0 2px #140f2b, 0 0 14px rgba(98, 244, 248, 0.18);
}
button:hover, .button:hover { background: #1b1340; color: #fff; }
button:active, .button:active { transform: translateY(1px); }
.primary {
  background: var(--pink); border-color: #ff9fd4; color: #fff;
  box-shadow: 0 0 0 2px #140f2b, 0 0 18px rgba(255, 63, 164, 0.4);
}
.primary:hover { background: #ff5cb3; }
.small { min-height: 40px; padding: 8px 14px; font-size: 14px; }

.hud-buttons {
  position: absolute; z-index: 3; display: flex; gap: 8px;
  top: max(10px, env(safe-area-inset-top)); right: max(10px, env(safe-area-inset-right));
}
.icon-button {
  width: 44px; height: 44px; min-height: 44px; padding: 10px;
  background: rgba(15, 10, 36, 0.7); border-color: rgba(98, 244, 248, 0.6);
}
.icon-button svg { width: 20px; height: 20px; fill: var(--cyan); stroke: var(--cyan); }
.icon-button .cross { display: none; }
.icon-button.off .waves { display: none; }
.icon-button.off .cross { display: inline; }
.icon-button.off svg { fill: var(--muted); stroke: var(--muted); }
.in-game { display: none; }
.stage.active .in-game { display: inline-flex; }

/* ------------------------------------------------------------ overlays */
.overlay {
  position: absolute; inset: 0; z-index: 2;
  display: grid; place-items: center; overflow-y: auto;
  padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
  background: rgba(7, 4, 15, 0.45);
  touch-action: pan-y;
}
.overlay[hidden] { display: none; }
.panel {
  width: 100%; max-width: 360px; text-align: center;
  padding: 22px 20px; background: rgba(15, 10, 36, 0.88);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 2px #140f2b, 0 0 32px rgba(98, 244, 248, 0.16);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.panel p { margin: 0; }
.panel h2 { margin: 0; font-size: 26px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cyan); }
.panel > button { width: 100%; max-width: 240px; }
.logo { width: 288px; height: auto; max-width: 100%; image-rendering: pixelated; }
@media (max-width: 340px) { .logo { width: 192px; } }
.tagline { color: var(--muted); font-size: 15px; }
.best { color: var(--yellow); font-weight: 600; letter-spacing: 0.05em; }
.controls { color: var(--muted); font-size: 13px; }
.for-touch { display: none; }
body.touch .for-touch { display: block; }
body.touch .for-keys { display: none; }
.row { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.more { color: var(--cyan); }
.final { font-size: 40px; font-weight: 700; color: #fff; line-height: 1; letter-spacing: 0.02em; }
.new-best { color: var(--pink); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin: 0; width: 100%; }
.stats div { padding: 6px 0; border-top: 1px solid var(--line); }
.stats dt { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.stats dd { margin: 0; font-weight: 700; }
.bar { width: 200px; height: 6px; background: var(--line); }
.bar div { height: 100%; width: 0; background: var(--cyan); transition: width 0.2s; }
.toast {
  position: absolute; z-index: 4; left: 50%; bottom: max(20px, env(safe-area-inset-bottom)); transform: translateX(-50%);
  margin: 0; padding: 10px 16px; background: var(--deep); border: 2px solid var(--yellow); max-width: calc(100% - 32px);
  overflow-wrap: anywhere;
}

/* ------------------------------------------------------------ article */
.content { max-width: 760px; margin: 0 auto; padding: 56px 16px 40px; }
.content h1 { font-size: clamp(28px, 6vw, 40px); line-height: 1.15; margin: 0 0 16px; color: #fff; }
.content h2 { font-size: 24px; margin: 48px 0 12px; color: var(--cyan); }
.content h3 { font-size: 18px; margin: 24px 0 4px; color: #fff; }
.lead { font-size: 18px; color: #d9d3ff; }
.content code { background: var(--deep); padding: 1px 5px; border: 1px solid var(--line); font-size: 0.92em; }
.content li { margin: 6px 0; }
.controls-list div { padding: 10px 0; border-top: 1px solid var(--line); }
.controls-list dt { font-weight: 700; color: #fff; }
.controls-list dd { margin: 2px 0 0; color: #d9d3ff; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; }
figure { margin: 0; }
.cards figure { background: var(--deep); border: 1px solid var(--line); padding: 16px; text-align: center; }
.cards img { width: 114px; height: auto; }
figure img { image-rendering: pixelated; display: block; margin: 0 auto 10px; max-width: 100%; height: auto; }
figure.wide { margin: 24px 0; padding: 18px; background: var(--deep); border: 1px solid var(--line); }
figcaption { color: #d9d3ff; font-size: 15px; }
.site-footer {
  display: flex; gap: 20px; flex-wrap: wrap; justify-content: center;
  padding: 28px 16px calc(28px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); font-size: 15px;
}