:root {
  --memory-primary: #F09E0B;
  --memory-border: #3d4f63;
  --memory-text: #e5e7eb;
  --player-max-width: 1280px;
  --player-primary: var(--memory-primary);
  --player-border: var(--memory-border);
  --player-text: var(--memory-text);
}

body {
  background:
    radial-gradient(circle at top, rgba(240, 158, 11, 0.12), rgba(15, 23, 42, 0) 28%),
    linear-gradient(180deg, #0f172a 0%, #152234 100%);
}

.memory-player-hero,
.memory-stage,
.state-card {
  background: linear-gradient(180deg, rgba(38, 53, 73, 0.98), rgba(26, 37, 47, 0.98));
  border: 1px solid var(--memory-border);
  border-radius: 18px;
  padding: 1.5rem;
}

.memory-description {
  margin: 0;
  color: #cbd5e1;
}

.memory-stage {
  display: grid;
  gap: 1rem;
}

.memory-toolbar {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  flex-wrap: wrap;
}

.memory-stage-head {
  display: grid;
  gap: 1rem;
}

.fullscreen-toolbar {
  display: flex;
  width: 100%;
  justify-content: center;
}

.fullscreen-size-control {
  width: min(100%, 560px);
  display: grid;
  gap: 0.9rem;
  padding: 1.15rem 1.4rem;
  border-radius: 18px;
  border: 1px solid rgba(240, 158, 11, 0.24);
  background: rgba(15, 23, 42, 0.45);
}

.fullscreen-size-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: #e2e8f0;
  font-weight: 600;
}

.fullscreen-size-slider {
  width: 100%;
  accent-color: #f09e0b;
  cursor: pointer;
  min-height: 1.4rem;
}

.fullscreen-size-slider::-webkit-slider-runnable-track {
  height: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(240, 158, 11, 0.88), rgba(93, 208, 255, 0.72));
}

.fullscreen-size-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: -0.34rem;
  border-radius: 50%;
  border: 2px solid #fff7e1;
  background: #f09e0b;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.28);
}

.fullscreen-size-slider::-moz-range-track {
  height: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(240, 158, 11, 0.88), rgba(93, 208, 255, 0.72));
}

.fullscreen-size-slider::-moz-range-thumb {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  border: 2px solid #fff7e1;
  background: #f09e0b;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.28);
}

.pill {
  border: 2px solid var(--memory-border);
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: rgba(38, 53, 73, 0.72);
  font-size: 0.95rem;
  color: var(--memory-text);
}

button {
  appearance: none;
  border: 1px solid var(--memory-border);
  color: var(--memory-text);
  background: rgba(38, 53, 73, 0.6);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  transition: all 0.2s ease;
}

button:hover {
  background: rgba(240, 158, 11, 0.16);
  border-color: var(--memory-primary);
}

button.ghost {
  background: transparent;
  border-color: var(--memory-primary);
  color: var(--memory-primary);
}

.state-card {
  color: #cbd5e1;
  text-align: center;
}

.hidden {
  display: none !important;
}

.memory-app {
  display: grid;
  gap: 1rem;
}

.status-banner {
  padding: 0.95rem 1rem;
  border-radius: 12px;
  background: rgba(240, 158, 11, 0.1);
  border: 1px solid rgba(240, 158, 11, 0.28);
  color: #f8d08a;
  font-weight: 600;
  text-align: center;
}

.memory-grid {
  --memory-columns: 4;
  --fullscreen-card-scale: 2.75;
  --fullscreen-card-size: 302.5px;
  display: grid;
  grid-template-columns: repeat(var(--memory-columns), minmax(110px, 1fr));
  gap: 1rem;
}

.memory-card {
  position: relative;
  border: none;
  padding: 0;
  background: transparent;
  aspect-ratio: 1 / 1;
  perspective: 1200px;
  transform-style: preserve-3d;
}

.memory-card:disabled {
  cursor: default;
}

.memory-card-inner {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.2, 0.75, 0.25, 1);
  will-change: transform;
}

.memory-card.is-revealed .memory-card-inner,
.memory-card.is-matched .memory-card-inner {
  transform: rotateY(180deg);
}

.memory-card-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  border-radius: 18px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
  text-align: center;
}

.memory-card-back {
  border: 2px solid rgba(240, 158, 11, 0.34);
  background:
    linear-gradient(135deg, rgba(240, 158, 11, 0.12) 25%, transparent 25%) -16px 0 / 32px 32px,
    linear-gradient(225deg, rgba(240, 158, 11, 0.12) 25%, transparent 25%) -16px 0 / 32px 32px,
    linear-gradient(315deg, rgba(240, 158, 11, 0.12) 25%, transparent 25%) 0 0 / 32px 32px,
    linear-gradient(45deg, rgba(240, 158, 11, 0.12) 25%, transparent 25%) 0 0 / 32px 32px,
    linear-gradient(180deg, #31475a 0%, #1c2a36 100%);
  box-shadow: inset 0 0 0 8px rgba(255, 255, 255, 0.04), inset 0 0 0 16px rgba(15, 23, 42, 0.18), 0 16px 24px rgba(0, 0, 0, 0.2);
}

.memory-card-back::before,
.memory-card-back::after {
  content: '';
  position: absolute;
  inset: 14%;
  border-radius: 14px;
  border: 2px solid rgba(240, 158, 11, 0.28);
}

.memory-card-back::after {
  inset: 26%;
  border-style: solid;
  opacity: 0.7;
}

.memory-card-back-pattern {
  position: absolute;
  inset: 12%;
  transform: rotate(45deg);
  background:
    repeating-linear-gradient(0deg, rgba(240, 158, 11, 0.16) 0 10px, transparent 10px 20px),
    repeating-linear-gradient(90deg, rgba(240, 158, 11, 0.1) 0 10px, transparent 10px 20px);
  border: 1px solid rgba(240, 158, 11, 0.22);
  border-radius: 18px;
}

.memory-card-front {
  transform: rotateY(180deg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(226, 232, 240, 0.95));
  border: 1px solid rgba(148, 163, 184, 0.72);
  box-shadow: 0 16px 24px rgba(15, 23, 42, 0.18);
}

.memory-card-front > div {
  width: 100%;
  color: #13202b;
  font-weight: 700;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  line-height: 1.35;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.memory-card-front > div.is-tight {
  font-size: clamp(0.82rem, 1.7vw, 0.98rem);
  line-height: 1.28;
}

.memory-card-front > div.is-compact {
  font-size: clamp(0.74rem, 1.45vw, 0.88rem);
  line-height: 1.22;
}

.memory-card-front > div.is-dense {
  font-size: clamp(0.66rem, 1.2vw, 0.78rem);
  line-height: 1.16;
}

.memory-card.is-matched .memory-card-front {
  background:
    linear-gradient(180deg, hsla(var(--pair-hue), 88%, 82%, 0.96), hsla(var(--pair-hue), 76%, 66%, 0.92));
  border-color: hsla(var(--pair-hue), 75%, 40%, 0.8);
}

.memory-card.is-matched .memory-card-front > div {
  color: hsl(var(--pair-hue) 44% 18%);
}

.memory-stage:fullscreen {
  width: 100%;
  max-width: none;
  min-height: 100vh;
  border-radius: 0;
  padding: 2rem;
  overflow-y: auto;
  background:
    radial-gradient(circle at top, rgba(240, 158, 11, 0.12), rgba(15, 23, 42, 0.98) 30%, rgba(10, 15, 25, 1) 100%),
    #111827;
}

.memory-stage:fullscreen .memory-stage-head {
  position: sticky;
  top: 0;
  z-index: 20;
  width: min(1500px, 100%);
  margin-left: auto;
  margin-right: auto;
  padding-top: 8px;
  padding-bottom: 12px;
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.96), rgba(17, 24, 39, 0.84) 70%, rgba(17, 24, 39, 0));
  backdrop-filter: blur(10px);
}

.memory-stage:fullscreen .memory-toolbar,
.memory-stage:fullscreen .fullscreen-toolbar,
.memory-stage:fullscreen .status-banner,
.memory-stage:fullscreen .memory-grid {
  width: min(1500px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.memory-stage:fullscreen .memory-toolbar,
.memory-stage:fullscreen .fullscreen-toolbar,
.memory-stage:fullscreen .status-banner {
  justify-content: center;
  text-align: center;
}

.memory-stage:fullscreen .pill,
.memory-stage:fullscreen button,
.memory-stage:fullscreen .fullscreen-size-header,
.memory-stage:fullscreen .status-banner {
  font-size: 1.1875rem;
  line-height: 1.2;
}

.memory-stage:fullscreen .pill,
.memory-stage:fullscreen button {
  padding: 0.9375rem 1.25rem;
  min-height: 3.625rem;
  box-sizing: border-box;
}

.memory-stage:fullscreen .memory-toolbar {
  gap: 0.9rem;
  margin-bottom: 0;
  min-height: 3.625rem;
}

.memory-stage:fullscreen .fullscreen-toolbar {
  margin-bottom: 0;
  min-height: 6.5rem;
  align-items: center;
}

.memory-stage:fullscreen .fullscreen-size-control {
  width: min(100%, 560px);
  height: 6.5rem;
  padding: 1.15rem 1.4rem;
  box-sizing: border-box;
}

.memory-stage:fullscreen .fullscreen-size-slider {
  display: block;
  height: 22px;
  min-height: 22px;
}

.memory-stage:fullscreen .status-banner {
  min-height: 3.625rem;
  padding: 0.95rem 1rem;
  box-sizing: border-box;
}

.memory-stage:fullscreen .memory-grid {
  width: max-content;
  max-width: none;
  grid-template-columns: repeat(var(--memory-columns), var(--fullscreen-card-size));
  gap: 0.55rem;
  align-items: start;
}

.memory-stage:fullscreen .memory-app {
  justify-items: center;
  overflow-x: auto;
}

.memory-stage:fullscreen .memory-card {
  width: var(--fullscreen-card-size);
}

.memory-stage:fullscreen .memory-card-face {
  padding: 1rem;
  border-radius: 18px;
}

.memory-stage:fullscreen .memory-card-front > div {
  font-size: clamp(calc(0.9rem * var(--fullscreen-card-scale)), calc(2vw * var(--fullscreen-card-scale)), calc(1.1rem * var(--fullscreen-card-scale)));
}

.memory-stage:fullscreen .memory-card-front > div.is-tight {
  font-size: clamp(calc(0.82rem * var(--fullscreen-card-scale)), calc(1.7vw * var(--fullscreen-card-scale)), calc(0.98rem * var(--fullscreen-card-scale)));
}

.memory-stage:fullscreen .memory-card-front > div.is-compact {
  font-size: clamp(calc(0.74rem * var(--fullscreen-card-scale)), calc(1.45vw * var(--fullscreen-card-scale)), calc(0.88rem * var(--fullscreen-card-scale)));
}

.memory-stage:fullscreen .memory-card-front > div.is-dense {
  font-size: clamp(calc(0.66rem * var(--fullscreen-card-scale)), calc(1.2vw * var(--fullscreen-card-scale)), calc(0.78rem * var(--fullscreen-card-scale)));
}

.fullscreen-toolbar.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .memory-grid {
    grid-template-columns: repeat(var(--memory-columns), minmax(90px, 1fr));
  }
}

@media (max-width: 768px) {
  .memory-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .pill,
  button {
    width: 100%;
    text-align: center;
  }

  .memory-grid {
    gap: 0.75rem;
  }

  .memory-card-face {
    padding: 0.7rem;
  }
}

@media (max-width: 560px) {
  .memory-grid {
    grid-template-columns: repeat(var(--memory-columns), minmax(72px, 1fr));
  }

}