:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #f4f7ff;
  background: #070a12;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --panel: rgba(15, 20, 36, 0.82);
  --panel-strong: rgba(18, 25, 44, 0.96);
  --line: rgba(145, 170, 255, 0.18);
  --muted: #94a2bd;
  --accent: #72f1c8;
  --accent-2: #7ea6ff;
  --danger: #ff6b8b;
}

* { box-sizing: border-box; }

html, body, #app {
  margin: 0;
  min-width: 320px;
  min-height: 100%;
  background:
    radial-gradient(circle at 20% 0%, rgba(68, 96, 190, 0.18), transparent 34rem),
    radial-gradient(circle at 85% 15%, rgba(50, 210, 165, 0.12), transparent 30rem),
    #070a12;
}

body {
  min-height: 100dvh;
  overflow-x: hidden;
  overscroll-behavior: none;
}

button, kbd { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

#app {
  min-height: 100dvh;
  padding:
    max(14px, env(safe-area-inset-top))
    max(14px, env(safe-area-inset-right))
    max(14px, env(safe-area-inset-bottom))
    max(14px, env(safe-area-inset-left));
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 14px;
}

.topbar {
  width: min(1240px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.brand h1 {
  margin: 2px 0 0;
  font-size: clamp(1.45rem, 3vw, 2.2rem);
  letter-spacing: -0.045em;
}

.brand__eyebrow,
.panel-label {
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  font-weight: 800;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(78px, 1fr));
  gap: 8px;
}

.stat {
  min-width: 84px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(11, 15, 28, 0.62);
  backdrop-filter: blur(12px);
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat strong {
  display: block;
  margin-top: 2px;
  font-size: 1rem;
}

.game-shell {
  width: min(1240px, 100%);
  min-height: 0;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 14px;
}

.stage-card {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(18, 25, 45, 0.74), rgba(7, 10, 18, 0.9));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

#stage {
  position: absolute;
  inset: 0;
  touch-action: none;
}

#stage canvas {
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
}

.status-chip,
.camera-hint {
  position: absolute;
  z-index: 3;
  pointer-events: none;
  border: 1px solid var(--line);
  background: rgba(7, 10, 18, 0.65);
  backdrop-filter: blur(12px);
}

.status-chip {
  top: 14px;
  left: 14px;
  padding: 8px 10px;
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.69rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.camera-hint {
  right: 14px;
  bottom: 14px;
  padding: 7px 10px;
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.7rem;
}

.side-panel {
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 14px;
}

.panel-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  padding: 16px;
  backdrop-filter: blur(14px);
}

.next-preview {
  height: 160px;
  margin-top: 10px;
  border-radius: 14px;
  overflow: hidden;
  background: radial-gradient(circle at 50% 35%, rgba(126, 166, 255, 0.14), transparent 65%);
}

.help-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 11px 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.78rem;
}

kbd {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 28px;
  padding: 5px 8px;
  border-radius: 8px;
  border: 1px solid rgba(159, 183, 255, 0.25);
  background: rgba(126, 166, 255, 0.08);
  color: #dce6ff;
  font-size: 0.7rem;
}

.compact-actions { display: grid; gap: 9px; }

.primary-btn,
.secondary-btn,
.touch-btn,
.drop-btn {
  border: 0;
  cursor: pointer;
  color: #f7fbff;
  user-select: none;
}

.primary-btn {
  min-height: 48px;
  padding: 0 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #61a7ff);
  color: #06101a;
  font-weight: 900;
}

.secondary-btn {
  min-height: 44px;
  border-radius: 12px;
  background: rgba(126, 166, 255, 0.1);
  border: 1px solid rgba(126, 166, 255, 0.2);
  font-weight: 750;
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(3, 5, 10, 0.64);
  backdrop-filter: blur(8px);
}

.overlay--hidden { display: none; }

.overlay__panel {
  width: min(400px, 100%);
  padding: 26px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  text-align: center;
}

.overlay__kicker {
  margin: 0;
  color: var(--accent);
  letter-spacing: 0.15em;
  font-size: 0.72rem;
  font-weight: 900;
}

.overlay h2 { margin: 7px 0 8px; }
.overlay p { color: var(--muted); }

.touch-controls {
  display: none;
  width: min(900px, 100%);
  margin: 0 auto;
  grid-template-columns: minmax(150px, 1fr) auto minmax(150px, 1fr);
  align-items: center;
  gap: 12px;
  padding-bottom: env(safe-area-inset-bottom);
}

.touch-group--move {
  display: grid;
  width: 164px;
  height: 116px;
  grid-template: repeat(2, 1fr) / repeat(3, 1fr);
  gap: 6px;
}

.touch-btn {
  min-width: 50px;
  min-height: 50px;
  border-radius: 16px;
  border: 1px solid rgba(154, 181, 255, 0.2);
  background: rgba(30, 40, 67, 0.88);
  box-shadow: inset 0 1px rgba(255,255,255,0.06);
  font-weight: 900;
  touch-action: manipulation;
}

.touch-btn:active,
.drop-btn:active,
.secondary-btn:active,
.primary-btn:active {
  transform: translateY(1px) scale(0.98);
}

.touch-btn--up { grid-area: 1 / 2; }
.touch-btn--left { grid-area: 2 / 1; }
.touch-btn--down { grid-area: 2 / 2; }
.touch-btn--right { grid-area: 2 / 3; }

.touch-group--rotate {
  display: grid;
  grid-template-columns: repeat(3, 54px);
  gap: 7px;
}

.touch-btn--rotate {
  color: var(--accent);
  font-size: 1rem;
}

.drop-btn {
  min-height: 70px;
  padding: 10px 18px;
  border-radius: 18px;
  background: linear-gradient(135deg, #6be7c0, #688dff);
  color: #06101a;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-weight: 950;
  letter-spacing: 0.05em;
  touch-action: manipulation;
}

.drop-btn small {
  margin-top: 2px;
  font-size: 0.62rem;
  font-weight: 700;
  opacity: 0.75;
  letter-spacing: 0;
}

@media (hover: none), (pointer: coarse) {
  .touch-controls { display: grid; }
  .camera-hint { display: none; }
  .desktop-help { display: none; }
  .side-panel { grid-template-rows: auto auto; }
}

@media (max-width: 900px) {
  #app { gap: 10px; }
  .topbar { align-items: center; }
  .stats { grid-template-columns: repeat(4, minmax(0, 1fr)); flex: 1; }
  .stat { min-width: 0; padding: 8px; }
  .stat span { font-size: 0.59rem; }
  .game-shell { grid-template-columns: 1fr; }
  .stage-card { min-height: min(58dvh, 610px); }
  .side-panel {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto;
  }
  .next-card { display: grid; grid-template-columns: auto 120px; align-items: center; }
  .next-preview { height: 78px; margin: 0; }
  .desktop-help { display: none; }
  .compact-actions { grid-template-columns: repeat(2, minmax(100px, 1fr)); align-content: center; }
}

@media (max-width: 640px) {
  #app { padding: max(8px, env(safe-area-inset-top)) max(8px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left)); }
  .topbar { display: grid; gap: 8px; }
  .brand { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
  .brand__eyebrow { font-size: 0.58rem; }
  .brand h1 { font-size: 1.25rem; }
  .stat strong { font-size: 0.88rem; }
  .stage-card { min-height: min(52dvh, 500px); border-radius: 18px; }
  .side-panel { display: none; }
  .touch-controls { grid-template-columns: 1fr auto; grid-template-areas: "move drop" "rotate rotate"; }
  .touch-group--move { grid-area: move; }
  .touch-group--rotate { grid-area: rotate; justify-self: center; }
  .drop-btn { grid-area: drop; min-width: 110px; align-self: stretch; }
}

@media (max-height: 610px) and (orientation: landscape) and (hover: none) {
  #app { grid-template-columns: 1fr 250px; grid-template-rows: auto 1fr; }
  .topbar { grid-column: 1 / -1; }
  .game-shell { width: 100%; grid-template-columns: 1fr; }
  .stage-card { min-height: 0; height: calc(100dvh - 92px); }
  .side-panel { display: none; }
  .touch-controls {
    width: 100%;
    align-self: center;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }
  .touch-group--move,
  .touch-group--rotate,
  .drop-btn { justify-self: center; }
}


.site-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem max(14px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}