:is(.game-section, .dialog) {
  --coreball-card-bg: #ffffff;
  --coreball-text-primary: #1d2520;
  --coreball-text-secondary: #6b756f;
  --coreball-border-color: #e0e4e7;
  --coreball-brand: #5b5ff4;
  --coreball-danger-color: #ef4444;
  --coreball-shadow: 0 18px 45px rgba(37, 53, 46, 0.10);
  --coreball-control-muted: #5e6964;
  --coreball-control-accent-soft: #efefff;
}

html[data-page="coreball"] body.dialog-open {
  overflow: hidden;
}

html[data-page="coreball"] body.coreball-fullscreen-active {
  overflow: hidden;
}

.game-section {
  width: min(1200px, calc(100% - 32px));
  margin-right: auto;
  margin-left: auto;
}

:is(.coreball-panel, .dialog) :is(h1, h2, h3, p) {
  margin-top: 0;
}

.game-section {
  margin-top: var(--page-card-gap);
}

.coreball-panel {
  width: 100%;
  margin: 0;
  padding: 16px;
  background: #ffffff;
  border: 0;
  border-radius: 26px;
  box-shadow: 0 22px 60px rgba(23, 42, 59, 0.08);
}

.coreball-panel:fullscreen,
.coreball-panel.is-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  width: 100vw;
  height: 100dvh;
  min-height: 100dvh;
  padding: clamp(12px, 2vh, 22px);
  overflow: hidden;
  background: #ffffff;
  border-radius: 0;
}

.coreball-panel:fullscreen .game-layout,
.coreball-panel.is-fullscreen .game-layout,
.coreball-panel:fullscreen .play-card,
.coreball-panel.is-fullscreen .play-card {
  height: 100%;
  min-height: 0;
}

.coreball-panel:fullscreen .play-card,
.coreball-panel.is-fullscreen .play-card {
  grid-template-rows: minmax(0, 1fr);
  gap: 0;
  padding: 0;
}

.coreball-panel:fullscreen .canvas-wrap,
.coreball-panel.is-fullscreen .canvas-wrap {
  min-height: 0;
  height: 100%;
  aspect-ratio: auto;
}

.game-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: stretch;
}

.play-card {
  position: relative;
  display: grid;
  gap: 0;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  background: #000000;
  border: 0;
  border-radius: 16px;
  box-shadow: none;
}


.difficulty {
  color: var(--coreball-text-secondary);
  font-weight: 750;
}

.control-group {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--coreball-control-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: none;
  touch-action: manipulation;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.icon-button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.35;
}

.icon-button > span {
  display: none;
}

.icon-button:active {
  transform: scale(0.95);
}

.icon-button.is-on {
  color: #4c46b8;
  background: #e9e8ff;
  border-color: transparent;
  box-shadow: none;
}

.canvas-corner-controls {
  position: absolute;
  right: 12px;
  bottom: 12px;
  z-index: 2;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.canvas-wrap:hover .canvas-corner-controls,
.canvas-wrap:focus-within .canvas-corner-controls,
.canvas-wrap.is-speed-adjusting .canvas-corner-controls {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.canvas-speed-control {
  position: relative;
  display: flex;
  align-items: center;
}

.canvas-speed-button {
  display: grid;
  place-items: center;
  width: 48px;
  height: 44px;
  padding: 0;
  color: rgba(255, 255, 255, 0.58);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 780;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  touch-action: manipulation;
  transition: color 180ms ease, transform 180ms ease;
}

.canvas-speed-button:hover,
.canvas-speed-control.is-open .canvas-speed-button {
  color: rgba(167, 169, 255, 0.78);
}

.canvas-speed-button:active {
  transform: scale(0.95);
}

.canvas-speed-button:focus-visible {
  outline: 3px solid rgba(126, 122, 255, 0.4);
  outline-offset: 1px;
}

.canvas-speed-popover {
  position: absolute;
  bottom: 42px;
  left: 50%;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 176px;
  height: 44px;
  transform: translateX(-50%);
  animation: speedControlReveal 160ms ease-out;
}

.canvas-speed-popover[hidden] {
  display: none;
}

.canvas-speed-popover input {
  --speed-progress: 33.333%;
  appearance: none;
  width: 156px;
  height: 44px;
  margin: 0;
  background: transparent;
  cursor: pointer;
  touch-action: manipulation;
}

.canvas-speed-popover input::-webkit-slider-runnable-track {
  height: 3px;
  background: linear-gradient(to right, rgba(167, 169, 255, 0.82) 0 var(--speed-progress), rgba(255, 255, 255, 0.2) var(--speed-progress) 100%);
  border-radius: 999px;
}

.canvas-speed-popover input::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -5.5px;
  appearance: none;
  background: #d8d9ff;
  border: 2px solid #7773f2;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.42);
}

.canvas-speed-popover input::-moz-range-track {
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
  border: 0;
  border-radius: 999px;
}

.canvas-speed-popover input::-moz-range-progress {
  height: 3px;
  background: rgba(167, 169, 255, 0.82);
  border-radius: 999px;
}

.canvas-speed-popover input::-moz-range-thumb {
  width: 10px;
  height: 10px;
  background: #d8d9ff;
  border: 2px solid #7773f2;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.42);
}

.canvas-speed-popover input:focus-visible {
  outline: 0;
  filter: drop-shadow(0 0 3px rgba(126, 122, 255, 0.72));
}

.canvas-corner-controls .icon-button {
  color: rgba(255, 255, 255, 0.58);
  background: transparent;
  border-color: transparent;
  backdrop-filter: none;
}

.canvas-corner-controls .icon-button.is-on {
  color: rgba(167, 169, 255, 0.72);
  background: transparent;
  border-color: transparent;
}

.icon-button:focus-visible,
.secondary-action:focus-visible,
.danger-action:focus-visible,
.level-choice:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 3px;
}

.canvas-wrap {
  position: relative;
  width: 100%;
  min-height: 640px;
  margin: 0;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #000000;
  border: 0;
  border-radius: 16px;
}

.coreball-panel[data-state="failed"] .canvas-wrap {
  animation: canvasShake 160ms ease-in-out 2;
}

.coreball-canvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: 0;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
}

.coreball-canvas:focus-visible {
  box-shadow: inset 0 0 0 3px rgba(126, 122, 255, 0.34);
}

.game-section {
  margin-bottom: var(--page-card-gap);
}

.dialog[hidden] {
  display: none;
}

.dialog {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
}

.dialog-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.54);
  backdrop-filter: blur(6px);
}

.coreball-panel:fullscreen > .dialog,
.coreball-panel.is-fullscreen > .dialog {
  z-index: 1000;
}

.dialog-card {
  position: relative;
  z-index: 1;
  width: min(520px, 100%);
  max-height: min(88dvh, 720px);
  overflow: auto;
  padding: clamp(20px, 4vw, 30px);
  background: var(--coreball-card-bg);
  border: 0;
  border-radius: 20px;
  box-shadow: var(--coreball-shadow);
}

.dialog-card h2 {
  margin-bottom: 4px;
  font-size: clamp(1.55rem, 4vw, 2.1rem);
}

.dialog-card p {
  color: var(--coreball-text-secondary);
}

.level-dialog-card {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 12px;
  width: min(720px, 100%);
  max-height: min(84dvh, 760px);
  padding: 0;
  overflow: hidden;
  background: #fbfcfe;
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 24px;
  box-shadow: 0 24px 64px rgba(10, 20, 38, 0.22);
}

.level-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 24px 0;
}

.level-dialog-header h2 {
  margin-bottom: 4px;
  color: #101827;
  font-size: clamp(1.55rem, 3vw, 1.9rem);
  line-height: 1.12;
}

.level-dialog-header p {
  max-width: 36rem;
  margin-bottom: 0;
  color: #66736c;
  font-size: 0.9rem;
  line-height: 1.45;
}

.dialog-icon-close {
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
  width: 44px;
  min-height: 44px;
  color: #61706a;
  background: transparent;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease;
}

.dialog-icon-close svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.dialog-icon-close:hover {
  color: #172033;
  background: #f1f3f6;
}

.dialog-icon-close:focus-visible {
  outline: 3px solid rgba(91, 95, 244, 0.24);
  outline-offset: 3px;
}

.level-dialog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px 20px;
  margin: 0 24px;
  padding: 11px 14px;
  background: #f3f5f8;
  border: 1px solid #e8ebf0;
  border-radius: 14px;
}

.level-dialog-summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.level-dialog-summary span {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  color: #737f79;
  white-space: nowrap;
}

.level-dialog-summary strong {
  color: #111827;
  font-size: 0.95rem;
  line-height: 1.15;
}

.level-dialog-summary small {
  font-size: 0.72rem;
  font-weight: 800;
}

.level-dialog-legend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: #6f7a85;
  font-size: 0.7rem;
  font-weight: 800;
}

.level-dialog-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.level-dialog-legend i {
  width: 8px;
  height: 8px;
  background: #c8ced7;
  border-radius: 999px;
}

.level-dialog-legend i.is-cleared {
  background: #28a47b;
}

.level-dialog-legend i.is-current {
  background: var(--coreball-brand);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.secondary-action,
.danger-action {
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 12px;
  font-weight: 850;
  cursor: pointer;
}

.secondary-action {
  color: var(--coreball-text-primary);
  background: #ffffff;
  border: 1px solid var(--coreball-border-color);
}

.danger-action {
  color: #ffffff;
  background: var(--coreball-danger-color);
  border: 1px solid var(--coreball-danger-color);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  align-content: start;
  gap: 8px;
  min-height: 0;
  margin: 0;
  padding: 4px 24px 24px;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: rgba(91, 95, 244, 0.45) transparent;
}

.level-choice {
  position: relative;
  display: inline-grid;
  place-items: center;
  aspect-ratio: 1;
  min-height: 54px;
  padding: 6px;
  color: var(--coreball-text-primary);
  background: #ffffff;
  border: 1px solid #e8ebef;
  border-radius: 14px;
  cursor: pointer;
  box-shadow: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease, color 160ms ease;
}

.level-choice::after {
  content: "";
  position: absolute;
  top: 7px;
  right: 7px;
  width: 6px;
  height: 6px;
  background: #c8ced7;
  border-radius: 999px;
  opacity: 0;
}

.level-choice:hover:not(:disabled) {
  background: #f8f8ff;
  border-color: rgba(91, 95, 244, 0.42);
  box-shadow: 0 7px 18px rgba(36, 47, 72, 0.08);
}

.level-choice strong {
  font-size: 1rem;
  line-height: 1.1;
}

.level-choice.is-current {
  color: #ffffff;
  background: var(--coreball-brand);
  border-color: var(--coreball-brand);
  box-shadow: 0 8px 20px rgba(91, 95, 244, 0.24);
}

.level-choice.is-current::after {
  background: #ffffff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.22);
  opacity: 1;
}

.level-choice.is-cleared:not(.is-current) {
  color: #166553;
  background: #effaf6;
  border-color: #ccecdf;
}

.level-choice.is-cleared:not(.is-current)::after {
  background: #28a47b;
  opacity: 1;
}

.level-choice:disabled {
  color: #a4adb8;
  background: #f2f4f6;
  border-color: transparent;
  box-shadow: none;
  cursor: not-allowed;
}

.level-choice:disabled::after {
  background: #c8ced7;
  opacity: 0;
}

@keyframes speedControlReveal {
  from {
    opacity: 0;
    transform: translate(-50%, 6px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@keyframes canvasShake {
  0%,
  100% {
    transform: translateX(0);
  }
  35% {
    transform: translateX(-4px);
  }
  70% {
    transform: translateX(4px);
  }
}

@media (hover: hover) {
  .icon-button:hover {
    color: var(--coreball-brand);
    background: var(--coreball-control-accent-soft);
    border-color: transparent;
    box-shadow: none;
  }

  .icon-button.is-on:hover {
    color: #433da8;
    background: #dfdefd;
    border-color: transparent;
  }

  .canvas-corner-controls .icon-button:hover {
    color: rgba(255, 255, 255, 0.84);
    background: transparent;
    border-color: transparent;
  }

  .canvas-corner-controls .icon-button.is-on:hover {
    color: rgba(200, 201, 255, 0.9);
    background: transparent;
    border-color: transparent;
  }
}

@media (hover: none), (pointer: coarse) {
  .canvas-corner-controls {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .icon-button,
  .canvas-speed-button {
    transition: none;
  }

  .canvas-speed-popover {
    animation: none;
  }

  .canvas-corner-controls {
    transition: none;
  }

  .coreball-panel[data-state="failed"] .canvas-wrap {
    animation: none;
  }
}

@media (max-width: 1020px) {
  .game-layout {
      grid-template-columns: 1fr;
    }

  .canvas-wrap {
      min-height: min(78dvw, 640px);
    }
}

@media (max-width: 760px) {
  .play-card {
      padding: 0;
    }

  .canvas-wrap {
      min-height: min(82dvw, 520px);
      aspect-ratio: 1 / 1.18;
    }

  .level-grid {
      grid-template-columns: repeat(8, minmax(0, 1fr));
    }

  .level-dialog-card {
      width: min(100%, 680px);
    }

  .level-dialog-header {
      padding: 20px 22px 0;
    }

  .level-dialog-toolbar {
      margin-right: 22px;
      margin-left: 22px;
    }

  .level-grid {
      padding-right: 22px;
      padding-left: 22px;
    }
}

@media (max-width: 460px) {
  .game-section {
      width: min(100% - 22px, 1200px);
    }

  .coreball-panel {
      padding: 10px;
      border-radius: 18px;
    }

  .coreball-panel:fullscreen,
  .coreball-panel.is-fullscreen {
      padding: 8px;
    }

  .coreball-panel:fullscreen .play-card,
  .coreball-panel.is-fullscreen .play-card {
      gap: 0;
      padding: 0;
    }

  .coreball-panel:fullscreen .canvas-wrap,
  .coreball-panel.is-fullscreen .canvas-wrap {
      height: 100%;
      min-height: 0;
      aspect-ratio: auto;
    }

  .canvas-wrap {
      min-height: min(88dvw, 390px);
      border-radius: 14px;
    }

  .canvas-corner-controls {
      right: 8px;
      bottom: 8px;
    }

  .play-card {
      padding: 0;
    }

  .level-grid {
      grid-template-columns: repeat(5, minmax(0, 1fr));
    }

  .level-dialog-card {
      max-height: min(88dvh, 720px);
      border-radius: 20px;
    }

  .level-dialog-header {
      gap: 12px;
      padding: 18px 16px 0;
    }

  .level-dialog-header h2 {
      font-size: 1.5rem;
    }

  .level-dialog-header p {
      font-size: 0.84rem;
      line-height: 1.45;
    }

  .dialog-icon-close {
      width: 44px;
      min-height: 44px;
    }

  .level-dialog-toolbar {
      align-items: flex-start;
      flex-direction: column;
      gap: 9px;
      margin-right: 16px;
      margin-left: 16px;
      padding: 10px 12px;
    }

  .level-dialog-summary {
      gap: 6px 14px;
    }

  .level-dialog-legend {
      justify-content: flex-start;
      gap: 7px 12px;
    }

  .level-grid {
      grid-auto-rows: 56px;
      gap: 8px;
      padding-right: 16px;
      padding-bottom: 18px;
      padding-left: 16px;
    }

  .level-choice {
      width: 100%;
      height: 56px;
      min-height: 56px;
      aspect-ratio: auto;
      border-radius: 12px;
    }

  .dialog {
      padding: 12px;
    }

  .dialog-card {
      border-radius: 18px;
    }
}

@media (max-height: 620px) and (orientation: landscape) {
  .canvas-wrap {
      min-height: 300px;
      aspect-ratio: 1.35 / 1;
    }
}