:root {
  --bg: #0f1220;
  --panel: #171b2f;
  --text: #f2f5ff;
  --muted: #9ea7c7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding-bottom: 170px;
  background: radial-gradient(circle at 20% 20%, #1a1f38, var(--bg));
  color: var(--text);
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
}
.wrap {
  display: grid;
  grid-template-columns: auto 280px;
  gap: 1rem;
  align-items: start;
  padding: 1rem;
}
.game, .panel {
  background: var(--panel);
  border: 1px solid #2a3155;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(0,0,0,.25);
}
.game { padding: .8rem; }
#board {
  display: block;
  width: 300px;
  height: 600px;
  background: #0a0d1a;
  border-radius: 8px;
}
.panel { padding: 1rem; }
h1 { margin: 0 0 .4rem; }
.hint {
  margin: 0 0 1rem;
  font-size: .9rem;
  color: var(--muted);
  line-height: 1.4;
}
.stats { display: grid; gap: .6rem; margin-bottom: 1rem; }
.stats div {
  display: flex;
  justify-content: space-between;
  padding: .5rem .7rem;
  border-radius: 8px;
  background: #10152a;
  border: 1px solid #273058;
}
.stats span { color: var(--muted); }
.next-wrap { display: grid; gap: .45rem; margin-bottom: 1rem; }
#next {
  width: 120px;
  height: 120px;
  background: #0a0d1a;
  border: 1px solid #273058;
  border-radius: 8px;
}
.actions { display: grid; gap: .6rem; }
button {
  width: 100%;
  padding: .7rem .8rem;
  border-radius: 8px;
  border: 1px solid #2d3f7a;
  color: var(--text);
  background: linear-gradient(#2142b2, #17307f);
  font-weight: 700;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
button.ghost {
  background: #121a34;
  border-color: #2a3768;
}
.touch {
  position: fixed;
  left: 50%;
  bottom: max(10px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  width: min(460px, calc(100vw - 1rem));
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: .45rem;
  margin: 0;
  padding: .55rem;
  background: rgba(8, 12, 28, 0.5);
  border: 1px solid rgba(80, 100, 170, 0.45);
  border-radius: 16px;
  backdrop-filter: blur(8px);
  z-index: 20;
}
.touch button {
  font-size: 1.2rem;
  padding: .8rem .4rem;
  border-radius: 999px;
  border: 1px solid #3a4d8e;
  background: rgba(17, 24, 51, 0.9);
  backdrop-filter: blur(4px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}
.touch button:active {
  transform: scale(0.96);
  filter: brightness(1.15);
}
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 20, .68);
  display: grid;
  place-items: center;
  padding: 1rem;
}
.overlay-card {
  width: min(92vw, 340px);
  background: #10152a;
  border: 1px solid #303d72;
  border-radius: 14px;
  padding: 1rem;
  text-align: center;
}
.overlay h2 { margin: 0 0 .3rem; }
.overlay p { margin: 0; color: var(--muted); }
.overlay-score {
  color: #fff !important;
  font-weight: 700;
  margin: .8rem 0 !important;
}
.hidden { display: none; }
@media (max-width: 760px) {
  body { align-items: start; }

  .wrap {
    grid-template-columns: 1fr;
    width: 100%;
    max-width: 460px;
    margin: 0 auto;
    padding: .8rem;
  }

  .panel { width: 100%; }

  .touch button {
    min-height: 52px;
    font-size: 1.15rem;
    padding: .6rem .2rem;
  }
}