/* WHITE DASH — greyscale, flat, crunchy */

:root {
  --bg: #f2f2f0;
  --ink: #161616;
  --grey: #6d6d69;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

#game {
  position: fixed;
  inset: 0;
  display: block;
  touch-action: none; /* no double-tap zoom while playing */
  cursor: pointer;
  height: 100%;
  width: 100%;
}

/* ---------- HUD ---------- */
#hud {
  position: fixed;
  top: 28px;
  left: 0;
  right: 0;
  text-align: center;
  pointer-events: none;
}

#score {
  font-size: clamp(44px, 8vw, 76px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
}

#score.pop { animation: pop 0.18s ease-out; }

@keyframes pop {
  40% { transform: scale(1.22); }
}

#best {
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.25em;
  color: var(--grey);
}

/* ---------- Sound toggle ---------- */
#sound {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 10;
  font: 600 11px/1 var(--mono);
  letter-spacing: 0.18em;
  padding: 9px 13px;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

#sound:hover { background: var(--ink); color: var(--bg); }

/* ---------- Screens (start / game over) ---------- */
#screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  pointer-events: none; /* clicks pass through to the game input */
}

#screen .card { padding: 0 24px; animation: rise 0.35s ease-out both; }

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
}

.title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-size: clamp(34px, 7vw, 64px);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.logo {
  width: 0.72em;
  height: 0.72em;
  background: var(--ink);
  animation: hop 1.2s cubic-bezier(0.3, 0, 0.25, 1) infinite;
}

@keyframes hop {
  0%, 100% { transform: translateY(0); }
  40%      { transform: translateY(-0.22em); }
  62%      { transform: translateY(0) scale(1.12, 0.88); } /* little landing squash */
}

.rules {
  margin-top: 20px;
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--grey);
}

.start {
  margin-top: 30px;
  font-size: 12px;
  letter-spacing: 0.24em;
  animation: blink 1.15s infinite;
}

@keyframes blink {
  50% { opacity: 0.25; }
}

.over-label {
  font-size: 14px;
  letter-spacing: 0.32em;
  color: var(--grey);
}

.final {
  margin-top: 6px;
  font-size: clamp(64px, 15vw, 130px);
  font-weight: 700;
  line-height: 1.05;
}

.best-line {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--grey);
}

.newbest {
  display: inline-block;
  padding: 7px 15px;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 700;
  animation: pulse 0.65s ease-in-out infinite alternate;
}

@keyframes pulse {
  to { transform: scale(1.09); }
}