:root {
  color-scheme: dark;
  --bg: #070b18;
  --panel: rgba(17, 25, 48, 0.88);
  --panel-border: rgba(123, 149, 255, 0.22);
  --text: #f7f8ff;
  --muted: #9ba8cf;
  --cyan: #35e0ff;
  --purple: #9d6cff;
  --pink: #ff5caf;
  --danger: #ff6684;
}

* { box-sizing: border-box; }

html, body {
  min-height: 100%;
  margin: 0;
  overscroll-behavior: none;
  touch-action: manipulation;
}

body {
  display: grid;
  place-items: center;
  padding: max(14px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left));
  overflow-x: hidden;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 15% 10%, rgba(53, 224, 255, 0.13), transparent 34%),
    radial-gradient(circle at 90% 80%, rgba(157, 108, 255, 0.17), transparent 38%),
    linear-gradient(160deg, #050712, var(--bg) 55%, #0b1021);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 28px 28px;
}

button { font: inherit; }

.game-shell {
  width: min(100%, 570px);
  position: relative;
}

.game-header, .player-row, .header-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.game-header { margin-bottom: 12px; }
.header-actions { gap: 7px; }

.eyebrow {
  margin: 0 0 2px;
  color: var(--cyan);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.24em;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 10vw, 3.2rem);
  line-height: 0.9;
  letter-spacing: 0.13em;
  text-shadow: 0 0 26px rgba(53, 224, 255, 0.32);
}

.text-button, .primary-button, .control-button {
  border: 1px solid var(--panel-border);
  color: var(--text);
  background: rgba(23, 33, 62, 0.92);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 8px 24px rgba(0,0,0,.22);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.text-button {
  min-width: 70px;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 750;
}

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

.status-panel, .game-panel {
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.38), inset 0 1px 0 rgba(255,255,255,.04);
  backdrop-filter: blur(16px);
}

.status-panel {
  min-height: 280px;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 32px;
  text-align: center;
  color: var(--muted);
}

.status-panel[hidden], .game-panel[hidden], [hidden] { display: none !important; }

.loader {
  width: 42px;
  height: 42px;
  border: 3px solid rgba(53, 224, 255, 0.2);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.error-panel h2 { color: var(--danger); }
.game-panel { padding: 12px; }
.player-row { min-height: 36px; margin: 0 2px 10px; color: var(--muted); font-size: .86rem; }
.player-row > span:first-child { color: var(--text); font-weight: 800; }
.challenge-label { color: #ffc65c; font-weight: 700; text-align: right; }

.play-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(82px, 1fr);
  gap: 10px;
  align-items: start;
}

.board-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(53, 224, 255, 0.34);
  border-radius: 14px;
  background: #060a14;
  box-shadow: inset 0 0 24px rgba(0,0,0,.5), 0 0 24px rgba(53,224,255,.08);
}

#board { display: block; width: 100%; height: auto; aspect-ratio: 1 / 2; }

.side-panel { display: grid; gap: 8px; }

.stat-card {
  display: grid;
  gap: 3px;
  min-height: 56px;
  align-content: center;
  padding: 8px;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: rgba(8, 13, 28, 0.68);
}

.stat-card span { color: var(--muted); font-size: clamp(.55rem, 2.3vw, .7rem); font-weight: 800; letter-spacing: .12em; }
.stat-card strong { overflow-wrap: anywhere; font-size: clamp(.95rem, 4vw, 1.35rem); font-variant-numeric: tabular-nums; }
.next-card { padding: 6px; }
#next-piece { width: 100%; height: auto; aspect-ratio: 1; }

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 24px;
  text-align: center;
  background: rgba(4, 7, 16, .86);
  backdrop-filter: blur(8px);
}

.overlay h2 { margin: 0 0 8px; font-size: 1.8rem; }
.overlay p { max-width: 250px; margin: 0 0 18px; color: var(--muted); line-height: 1.45; }
.primary-button { padding: 12px 22px; border-radius: 13px; font-weight: 800; background: linear-gradient(135deg, #17667d, #6547a8); }

.controls {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 7px;
  margin-top: 11px;
}

.control-button {
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 62px;
  padding: 6px 2px;
  border-radius: 13px;
  font-size: 1.15rem;
  font-weight: 900;
  user-select: none;
}

.control-button small { margin-top: 2px; color: var(--muted); font-size: clamp(.45rem, 2vw, .6rem); letter-spacing: .05em; }
.control-button.rotate { border-color: rgba(157,108,255,.45); }
.control-button.hard { border-color: rgba(255,92,175,.48); }
.control-button:active, .control-button.active { transform: translateY(1px); filter: brightness(1.35); }
.keyboard-help { margin: 10px 0 0; color: var(--muted); text-align: center; font-size: .69rem; }

@media (min-width: 640px) {
  .game-panel { padding: 16px; }
  .play-grid { grid-template-columns: 300px 1fr; justify-content: center; gap: 14px; }
  .controls { gap: 10px; }
  .control-button { min-height: 70px; }
}

@media (max-height: 690px) and (orientation: landscape) {
  body { place-items: start center; }
  .game-shell { width: min(100%, 720px); }
  .game-header { margin-bottom: 6px; }
  h1 { font-size: 1.8rem; }
  .game-panel { padding: 9px; }
  .play-grid { grid-template-columns: minmax(180px, 250px) 100px; justify-content: center; }
  .controls { position: absolute; left: calc(50% + 90px); bottom: 10px; width: 310px; }
  .keyboard-help { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
}