:root {
  color-scheme: dark;
  --bg: #050816;
  --panel: #0b1329;
  --cyan: #65e7ff;
  --pink: #ff5ecf;
  --yellow: #ffe66d;
  --green: #7cffb2;
  --text: #f7fbff;
  --muted: #7f93ad;
}

* { box-sizing: border-box; }
html, body { margin: 0; width: 100%; min-height: 100%; background: #02040b; }
body {
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  color: var(--text);
  touch-action: none;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
}
button, a { font: inherit; -webkit-tap-highlight-color: transparent; }

#app {
  position: relative;
  width: min(100%, 520px);
  height: 100dvh;
  margin: 0 auto;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 0%, rgba(101,231,255,.13), transparent 28rem),
    linear-gradient(180deg, #081126, #030610 72%, #020309);
}

#hud {
  position: absolute;
  z-index: 6;
  top: calc(env(safe-area-inset-top) + 8px);
  left: 8px;
  right: 8px;
  height: 54px;
  display: grid;
  grid-template-columns: 42px repeat(3, 1fr) 42px;
  gap: 6px;
  align-items: stretch;
}
.stat {
  min-width: 0;
  padding: 7px 5px 5px;
  border: 1px solid rgba(101,231,255,.16);
  border-radius: 10px;
  background: rgba(5,12,28,.72);
  backdrop-filter: blur(8px);
  text-align: center;
}
.stat span { display: block; color: #6e849e; font-size: 7px; letter-spacing: .11em; }
.stat strong { display: block; margin-top: 3px; font-size: 13px; white-space: nowrap; overflow: hidden; }
.icon-btn {
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 12px;
  color: white;
  background: rgba(5,12,28,.72);
  text-decoration: none;
  backdrop-filter: blur(8px);
}

#stage {
  position: absolute;
  top: calc(env(safe-area-inset-top) + 70px);
  bottom: calc(env(safe-area-inset-bottom) + 112px);
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
}
#game {
  display: block;
  height: 100%;
  max-width: calc(100vw - 76px);
  aspect-ratio: 1 / 2;
  border: 1px solid rgba(101,231,255,.24);
  border-radius: 10px;
  background: rgba(1,5,14,.88);
  box-shadow: 0 0 45px rgba(0,0,0,.55), inset 0 0 40px rgba(101,231,255,.025);
}
#nextBox {
  width: 64px;
  margin-left: 7px;
  align-self: flex-start;
  margin-top: 8px;
  padding: 7px 4px 4px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  background: rgba(8,15,32,.68);
  text-align: center;
}
#nextBox span { color: #72869f; font-size: 8px; letter-spacing: .12em; }
#next { display: block; width: 56px; height: 56px; margin: 3px auto 0; }

#controls {
  position: absolute;
  z-index: 5;
  left: 10px;
  right: 10px;
  bottom: calc(env(safe-area-inset-bottom) + 9px);
  height: 94px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 7px;
}
#controls button {
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  color: #dceaff;
  background: linear-gradient(180deg, rgba(20,32,61,.94), rgba(8,15,32,.94));
  box-shadow: inset 0 1px rgba(255,255,255,.05), 0 8px 22px rgba(0,0,0,.24);
  font-size: 22px;
  font-weight: 900;
}
#controls button:active { transform: translateY(1px) scale(.98); background: #172748; }
#controls .rotate { color: var(--cyan); }
#controls .drop { color: #07111d; background: linear-gradient(135deg, var(--yellow), #fff1a2); font-size: 12px; letter-spacing: .07em; }

#overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(rgba(2,5,14,.78), rgba(2,5,14,.94));
  backdrop-filter: blur(5px);
}
#overlay.visible { display: flex; }
.panel { width: min(100%, 390px); text-align: center; }
.eyebrow { margin: 0 0 8px; color: var(--cyan); font-size: 9px; letter-spacing: .18em; }
h1 { margin: 0 0 18px; font-size: clamp(52px, 16vw, 84px); line-height: .78; letter-spacing: -.08em; }
h1 span { color: var(--yellow); text-shadow: 0 0 20px rgba(255,230,109,.22); }
#overlayText { max-width: 34ch; margin: 0 auto 18px; color: #9db0c5; font-size: 12px; line-height: 1.6; }
.best-line { margin-bottom: 16px; color: #6f829a; font-size: 10px; letter-spacing: .15em; }
.best-line strong { color: var(--pink); }
.primary-btn {
  width: min(100%, 290px);
  padding: 15px 18px;
  border: 0;
  border-radius: 14px;
  color: #061019;
  background: linear-gradient(135deg, var(--cyan), #b6f7ff);
  font-weight: 900;
  letter-spacing: .14em;
  box-shadow: 0 10px 30px rgba(101,231,255,.18);
}
.hint { margin-top: 11px; color: #53677f; font-size: 9px; }

@media (min-width: 560px) {
  body { background: #010205; }
  #app { box-shadow: 0 0 80px rgba(0,0,0,.85); }
}