:root {
  color-scheme: dark;
  --bg: #071016;
  --surface: #0f1b24;
  --surface-2: #132632;
  --border: #244253;
  --text: #f5fbff;
  --muted: #9db3c1;
  --accent: #22d3ee;
  --accent-2: #34d399;
  --danger: #fb7185;
  --warning: #fbbf24;
  --shadow: rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 14% 10%, rgba(34, 211, 238, 0.18), transparent 32%),
    radial-gradient(circle at 86% 14%, rgba(52, 211, 153, 0.16), transparent 30%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.memory-app {
  display: grid;
  gap: 1rem;
  min-height: 100vh;
  padding: clamp(0.8rem, 2vw, 1.5rem);
}

.memory-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  justify-content: space-between;
}

.memory-title {
  margin: 0;
  font-size: clamp(2rem, 4.2vw, 3.6rem);
  line-height: 1;
}

.memory-subtitle {
  max-width: 60rem;
  margin: 0.55rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.memory-actions,
.toolbar,
.pair-actions,
.game-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.memory-actions,
.toolbar {
  justify-content: space-between;
}

.layout {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr);
}

.panel,
.game-board-panel,
.live-panel {
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 20px 44px var(--shadow);
}

.panel {
  overflow: hidden;
}

.panel-body,
.game-board-panel,
.live-panel {
  display: grid;
  gap: 0.85rem;
  padding: clamp(0.8rem, 2vw, 1.05rem);
}

.game-list {
  display: grid;
  gap: 0.7rem;
}

.game-card,
.pair-card {
  border: 1px solid var(--border);
  border-radius: 0.68rem;
  background: var(--surface-2);
  padding: 0.65rem;
}

.pair-card.compact {
  padding-block: 0.5rem;
}

.game-card.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 38%, transparent);
}

.game-card h3,
.pair-card h3 {
  margin: 0;
}

.muted {
  color: var(--muted);
}

.button,
.mini-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 0.68rem;
  background: var(--surface-2);
  color: var(--text);
  font-weight: 850;
  text-decoration: none;
}

.button {
  min-height: 2.65rem;
  padding: 0.62rem 0.9rem;
}

.mini-button {
  min-height: 2.25rem;
  padding: 0.42rem 0.62rem;
}

.button.primary,
.mini-button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #061117;
}

.button.danger,
.mini-button.danger {
  border-color: color-mix(in srgb, var(--danger) 72%, var(--border));
  color: #fecdd3;
}

.field-grid,
.pair-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}

.field {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 750;
}

.field input,
.field select {
  width: 100%;
  min-height: 2.55rem;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  background: var(--surface);
  color: var(--text);
  padding: 0.58rem 0.7rem;
  outline: none;
}

.field input:focus,
.button:focus-visible,
.mini-button:focus-visible,
.icon-button:focus-visible,
.pair-summary:focus-visible,
.memory-card:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 2px;
}

.field-error,
.status.error {
  color: var(--danger);
}

.status.success {
  color: var(--accent-2);
}

.status {
  min-height: 1.4rem;
  color: var(--muted);
  font-weight: 750;
}

.pair-list {
  display: grid;
  gap: 0.55rem;
}

.pair-head {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0;
}

.pair-card.expanded .pair-head {
  margin-bottom: 0.65rem;
}

.pair-summary {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 0.55rem;
  align-items: center;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0;
  text-align: left;
}

.pair-index {
  display: grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--accent);
  font-weight: 900;
}

.pair-preview {
  display: flex;
  gap: 0.25rem;
}

.pair-thumb {
  display: grid;
  place-items: center;
  width: 2.05rem;
  height: 2.05rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  overflow: hidden;
}

.pair-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pair-copy {
  display: grid;
  min-width: 0;
}

.pair-copy strong,
.pair-copy .muted {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.compact-actions {
  flex: 0 0 auto;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--border);
  border-radius: 0.55rem;
  background: var(--surface);
  color: var(--text);
  font-weight: 900;
}

.preview-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.preview {
  display: grid;
  place-items: center;
  width: 4rem;
  height: 4rem;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  overflow: hidden;
  text-align: center;
}

.preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.live-shell {
  display: grid;
  gap: 1rem;
  min-height: 100vh;
  padding: clamp(0.8rem, 2vw, 1.5rem);
}

.live-panel {
  align-self: start;
}

.memory-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(var(--columns, 4), minmax(0, 1fr));
}

.memory-card {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(5.5rem, 16vw, 10rem);
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  background: linear-gradient(145deg, #123246, #0b1721);
  color: var(--text);
  font-weight: 900;
  text-align: center;
  transform-style: preserve-3d;
  transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
}

.memory-card.revealed,
.memory-card.matched {
  background: var(--surface-2);
  border-color: var(--accent);
}

.memory-card.matched {
  opacity: 0.62;
}

.card-face {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  padding: 0.65rem;
}

.card-face img {
  width: 100%;
  height: 100%;
  max-height: 8rem;
  object-fit: contain;
}

.card-back {
  font-size: clamp(1.4rem, 5vw, 3rem);
}

.winner-banner {
  border: 1px solid color-mix(in srgb, var(--accent-2) 65%, var(--border));
  border-radius: 0.8rem;
  background: color-mix(in srgb, var(--accent-2) 16%, var(--surface));
  padding: 1rem;
  font-weight: 900;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (min-width: 760px) {
  .field-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pair-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .layout {
    grid-template-columns: minmax(20rem, 0.42fr) minmax(0, 1fr);
  }

  .live-shell {
    grid-template-columns: minmax(16rem, 0.28fr) minmax(0, 1fr);
  }
}

@media (max-width: 759px) {
  .memory-app,
  .live-shell {
    padding: 0.65rem;
  }

  .memory-title {
    font-size: 2rem;
  }

  .memory-subtitle {
    font-size: 0.92rem;
  }

  .panel-body,
  .game-board-panel,
  .live-panel {
    padding: 0.7rem;
  }

  .button,
  .memory-actions,
  .toolbar {
    width: 100%;
  }

  .button {
    min-height: 2.45rem;
  }

  .mini-button {
    min-height: 2.1rem;
    padding-inline: 0.52rem;
    font-size: 0.9rem;
  }

  .pair-head {
    align-items: flex-start;
  }

  .pair-summary {
    flex: 1 1 12rem;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .pair-preview {
    display: none;
  }

  .pair-actions {
    flex: 1 1 100%;
  }

  .memory-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}