.power-page { min-height: 100vh; overflow-x: hidden; background: #07101d; }
.power-header {
  position: relative; z-index: 5; min-height: 78px; padding: 18px clamp(20px, 4vw, 56px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  border-bottom: 1px solid var(--border); background: rgba(7,16,29,.88); backdrop-filter: blur(14px);
}
.power-header-actions, .power-actions { display: flex; align-items: center; gap: 14px; }
.power-shell { position: relative; z-index: 1; width: min(1180px, 100%); margin: 0 auto; padding: 42px 24px 72px; }
.power-intro { display: flex; justify-content: space-between; align-items: end; gap: 34px; margin-bottom: 30px; }
.power-intro h1 { font-size: clamp(2rem, 4.6vw, 4rem); max-width: 760px; }
.power-intro p { color: var(--text-secondary); max-width: 720px; margin-top: 14px; }
.power-dashboard { display: grid; grid-template-columns: minmax(300px, 560px) minmax(280px, 1fr); gap: 28px; align-items: start; }
.game-stage { display: grid; justify-items: center; gap: 18px; }
.board-wrap {
  position: relative; width: min(100%, 460px); aspect-ratio: 1 / 2; padding: 10px;
  border: 1px solid var(--border-strong); border-radius: 18px;
  background: linear-gradient(160deg, rgba(20,36,60,.95), rgba(6,16,28,.95));
  box-shadow: 0 26px 80px rgba(0,0,0,.32), 0 0 55px rgba(58,163,227,.08);
}
#game-canvas { display: block; width: 100%; height: 100%; border-radius: 10px; background: #050d18; }
#game-canvas:focus-visible { outline: 2px solid var(--green); outline-offset: 4px; }
.game-overlay {
  position: absolute; inset: 10px; z-index: 3; display: grid; place-content: center; gap: 8px; text-align: center;
  padding: 30px; border-radius: 10px; background: rgba(5,13,24,.76); backdrop-filter: blur(5px);
  opacity: 0; visibility: hidden; transition: opacity .2s ease, visibility .2s ease;
}
.game-overlay.is-visible { opacity: 1; visibility: visible; }
.game-overlay strong { font-family: var(--font-display); font-size: clamp(1.5rem, 4vw, 2.5rem); }
.game-overlay span { color: var(--text-secondary); }
.mobile-controls { width: min(100%, 460px); display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.mobile-controls button {
  min-height: 52px; border: 1px solid var(--border-strong); border-radius: 12px;
  background: rgba(20,36,60,.88); font-size: 1.35rem; font-weight: 700; touch-action: manipulation;
}
.mobile-controls button:active { background: rgba(58,163,227,.25); transform: translateY(1px); }
.power-sidebar { display: grid; gap: 16px; }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: var(--border); }
.stats-grid div { padding: 16px 18px; display: flex; justify-content: space-between; background: rgba(15,27,46,.95); }
.stats-grid span, .next-panel span, .limit-heading span { color: var(--text-secondary); font-size: .82rem; }
.stats-grid strong { font-family: var(--font-display); }
.next-panel, .limit-panel, .keys-panel {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
  background: rgba(15,27,46,.9); box-shadow: 0 18px 50px rgba(0,0,0,.16);
}
.next-panel { display: grid; grid-template-columns: 1fr 128px; align-items: center; gap: 14px; }
.next-panel strong { display: block; margin-top: 5px; color: var(--green); }
#next-canvas { width: 128px; height: 96px; border-radius: 10px; background: rgba(5,13,24,.8); }
.limit-heading { display: flex; justify-content: space-between; gap: 14px; }
.limit-heading strong { color: var(--green); }
.limit-panel p { color: var(--text-secondary); font-size: .86rem; margin: 12px 0 18px; }
.power-legend { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.legend-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 10px; border-radius: 8px; background: rgba(6,16,28,.56); font-size: .75rem; }
.legend-swatch { width: 14px; height: 14px; border-radius: 3px; box-shadow: 0 0 12px currentColor; }
.keys-panel h2 { margin-bottom: 12px; font-size: 1rem; }
.keys-panel ul { display: grid; gap: 8px; }
.keys-panel li { display: flex; justify-content: space-between; gap: 15px; color: var(--text-secondary); font-size: .82rem; }
.keys-panel kbd { min-width: 72px; padding: 3px 7px; border: 1px solid var(--border-strong); border-radius: 5px; color: var(--text-primary); text-align: center; background: #07101d; }
.game-status { min-height: 50px; padding: 12px 14px; border-radius: 10px; color: var(--text-secondary); text-align: center; }
.game-status.is-blast { color: #c7ffe2; background: rgba(43,182,115,.13); animation: status-pulse .45s ease; }
@keyframes status-pulse { 50% { transform: scale(1.02); box-shadow: 0 0 30px rgba(43,182,115,.16); } }
dialog { width: min(520px, calc(100% - 32px)); border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 30px; color: var(--text-primary); background: var(--surface); }
dialog::backdrop { background: rgba(3,9,16,.78); backdrop-filter: blur(6px); }
dialog h2 { margin-bottom: 18px; }
dialog ol { padding-left: 20px; color: var(--text-secondary); }
dialog li { margin-bottom: 12px; }
.dialog-close { position: absolute; top: 12px; right: 15px; font-size: 1.6rem; color: var(--text-secondary); }

@media (min-width: 850px) { .mobile-controls { max-width: 380px; } }
@media (max-width: 760px) {
  .power-header { padding: 14px 18px; }
  .power-header .logo img { height: 30px; }
  .power-header-actions .btn { display: none; }
  .power-shell { padding: 30px 16px 56px; }
  .power-intro { align-items: flex-start; flex-direction: column; }
  .power-actions { width: 100%; }
  .power-actions .btn { flex: 1; justify-content: center; padding-inline: 16px; }
  .power-dashboard { grid-template-columns: 1fr; }
  .board-wrap { width: min(100%, 390px); }
}
@media (max-width: 390px) {
  .power-shell { padding-inline: 10px; }
  .stats-grid { grid-template-columns: 1fr; }
  .next-panel { grid-template-columns: 1fr 104px; }
  #next-canvas { width: 104px; }
  .mobile-controls button { min-height: 48px; }
}
@media (prefers-reduced-motion: reduce) {
  .game-status.is-blast { animation: none; }
}