:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #eef4f2;
  color: #18201f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

button {
  font: inherit;
  touch-action: manipulation;
}

.app-shell {
  min-height: 100vh;
  padding: max(24px, env(safe-area-inset-top)) max(28px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(28px, env(safe-area-inset-left));
  background:
    linear-gradient(150deg, var(--wash-a) 0%, var(--page-bg) 48%, var(--wash-b) 100%);
}

.theme-aurora {
  --page-bg: #f6efe2;
  --wash-a: #f0b7aa;
  --wash-b: #cceee5;
  --ink: #17201f;
  --muted: #5f6964;
  --panel: #fffaf0;
  --primary: #176b6b;
  --primary-strong: #0e4d4c;
  --accent: #ffbd59;
  --tile-a: #1f8f87;
  --tile-b: #e86f51;
}

.theme-studio {
  --page-bg: #eef4f0;
  --wash-a: #cdd9ff;
  --wash-b: #cfeee1;
  --ink: #181b24;
  --muted: #606673;
  --panel: #ffffff;
  --primary: #3a4f9f;
  --primary-strong: #24336f;
  --accent: #b7d66b;
  --tile-a: #3a4f9f;
  --tile-b: #cf4758;
}

.hero-panel,
.config-grid,
.game-header,
.status-panel,
.summary-panel {
  max-width: 1080px;
  margin: 0 auto;
}

.hero-panel {
  min-height: 44vh;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 390px);
  gap: 28px;
  align-items: center;
}

.brand-block {
  min-width: 0;
}

.brand-block h1,
.summary-panel h1 {
  margin: 0;
  font-size: clamp(3rem, 5.8vw, 5.15rem);
  line-height: 0.92;
  letter-spacing: 0;
  color: var(--ink);
  overflow-wrap: break-word;
}

.brand-block h1 {
  white-space: nowrap;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary-strong);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

.lead {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.18rem;
  line-height: 1.55;
  text-wrap: balance;
}

.preview-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 1fr));
  gap: 14px;
  width: min(100%, 390px);
  aspect-ratio: 1;
  justify-self: end;
}

.preview-tile,
.memory-tile {
  border: 0;
  border-radius: 8px;
  color: white;
  background: var(--tile-a);
  box-shadow: 0 18px 34px rgba(24, 32, 31, 0.14);
}

.preview-tile.color-1,
.preview-tile.color-2,
.memory-tile.color-1,
.memory-tile.color-2 {
  background: var(--tile-b);
}

.preview-tile.color-3,
.memory-tile.color-3 {
  background: var(--tile-a);
}

.preview-tile {
  display: grid;
  place-items: center;
}

.preview-tile svg,
.memory-tile svg {
  width: 52%;
  height: 52%;
  fill: none;
  stroke: currentColor;
  stroke-width: 7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.preview-tile svg circle:last-child {
  fill: none;
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.control-panel,
.status-panel,
.summary-panel {
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border: 1px solid rgba(24, 32, 31, 0.08);
  border-radius: 8px;
  padding: 22px;
  box-shadow: 0 14px 32px rgba(24, 32, 31, 0.08);
}

.control-panel h2 {
  margin: 0 0 14px;
  font-size: 1.05rem;
}

.control-panel p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.segmented button,
.ghost-button,
.secondary-action,
.primary-action,
.theme-choice {
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid rgba(24, 32, 31, 0.16);
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  line-height: 1.1;
}

.segmented button.selected,
.theme-choice.selected {
  border-color: var(--primary);
  box-shadow: inset 0 0 0 2px var(--primary);
}

.theme-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.theme-choice {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 8px 10px;
  align-items: center;
  text-align: left;
  padding: 10px;
}

.theme-choice small {
  grid-column: 2;
  color: var(--muted);
}

.swatch {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--tile-a), var(--accent), var(--tile-b));
}

.action-row {
  max-width: 1080px;
  margin: 22px auto 0;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.primary-action,
.secondary-action {
  padding: 0 20px;
  font-weight: 800;
}

.primary-action {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.secondary-action,
.ghost-button {
  background: rgba(255, 255, 255, 0.72);
}

.game-shell {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.game-header {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  gap: 16px;
  align-items: center;
}

.round-meter {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(24, 32, 31, 0.12);
}

.round-meter span {
  display: block;
  height: 100%;
  min-width: 8%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 240ms ease;
}

.status-panel {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.message {
  margin: 0;
  font-weight: 800;
  color: var(--ink);
}

.stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
}

.stats span,
.summary-stats span {
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(24, 32, 31, 0.06);
}

.memory-board {
  width: min(88vmin, 680px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(130px, 1fr));
  gap: 18px;
}

.memory-tile {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 1.05rem;
  transition: transform 140ms ease, filter 140ms ease, box-shadow 140ms ease;
}

.memory-tile:not(:disabled):hover,
.memory-tile.active {
  transform: translateY(-5px) scale(1.035);
  filter: saturate(1.35) brightness(1.16);
  box-shadow:
    0 0 0 5px #ffffff,
    0 0 0 10px var(--accent),
    0 24px 42px rgba(24, 32, 31, 0.24);
}

.memory-tile.active {
  animation: tile-pop 260ms ease-out;
}

.memory-tile.active::after {
  content: "";
  position: absolute;
  inset: 14px;
  border: 4px solid rgba(255, 255, 255, 0.92);
  border-radius: 8px;
  pointer-events: none;
}

.memory-tile.active svg {
  transform: scale(1.18);
}

.memory-tile svg {
  transition: transform 140ms ease;
}

.memory-tile:disabled {
  cursor: wait;
}

@keyframes tile-pop {
  0% {
    transform: translateY(0) scale(1);
  }

  55% {
    transform: translateY(-7px) scale(1.055);
  }

  100% {
    transform: translateY(-5px) scale(1.035);
  }
}

.summary-shell {
  display: grid;
  place-items: center;
}

.summary-panel {
  width: min(100%, 760px);
}

.summary-stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.site-footer {
  width: min(100%, 1080px);
  margin: 28px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 650;
  line-height: 1.4;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  min-height: 36px;
  display: inline-grid;
  place-items: center;
  padding: 0 14px;
  border-radius: 8px;
  background: var(--primary);
  color: white;
  font-weight: 700;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  background: var(--primary-strong);
}

@media (max-width: 900px) {
  .app-shell {
    padding: max(14px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left));
  }

  .hero-panel,
  .config-grid,
  .status-panel {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    min-height: auto;
    gap: 18px;
    align-items: start;
  }

  .brand-block h1,
  .summary-panel h1 {
    font-size: clamp(2.55rem, 15vw, 4.1rem);
    line-height: 0.96;
  }

  .brand-block h1 {
    white-space: normal;
  }

  .eyebrow {
    margin-bottom: 8px;
    font-size: 0.7rem;
  }

  .lead {
    margin: 12px 0 0;
    font-size: 1rem;
    line-height: 1.45;
  }

  .preview-board {
    width: min(100%, 300px);
    max-width: none;
    gap: 10px;
    justify-self: center;
  }

  .preview-tile {
    box-shadow: 0 10px 24px rgba(24, 32, 31, 0.12);
  }

  .tile-1,
  .tile-2 {
    --offset: 0;
  }

  .config-grid,
  .status-panel {
    display: grid;
  }

  .config-grid {
    gap: 12px;
    margin-top: 14px;
  }

  .control-panel,
  .status-panel,
  .summary-panel {
    padding: 16px;
  }

  .segmented {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .segmented button {
    min-height: 42px;
    padding: 0 6px;
    font-size: 0.86rem;
  }

  .theme-options {
    grid-template-columns: 1fr;
  }

  .theme-choice {
    min-height: 54px;
  }

  .action-row {
    margin-top: 14px;
  }

  .action-row > button,
  .action-row > .primary-action,
  .action-row > .secondary-action {
    width: 100%;
    min-height: 48px;
  }

  .game-shell {
    gap: 12px;
  }

  .game-header {
    grid-template-columns: auto 1fr;
    gap: 10px;
  }

  .game-header strong {
    grid-column: 1 / -1;
    justify-self: end;
    font-size: 0.95rem;
  }

  .ghost-button {
    min-height: 40px;
    padding: 0 12px;
  }

  .status-panel {
    gap: 12px;
  }

  .message {
    font-size: 0.98rem;
    line-height: 1.35;
  }

  .stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    font-size: 0.82rem;
  }

  .stats span {
    padding: 7px 6px;
    text-align: center;
    white-space: nowrap;
  }

  .memory-board {
    width: min(100%, 58vh, 430px);
    gap: 10px;
  }

  .memory-tile {
    min-height: 0;
    font-size: 0.92rem;
    box-shadow: 0 10px 24px rgba(24, 32, 31, 0.14);
  }

  .memory-tile svg {
    width: 46%;
    height: 46%;
  }

  .summary-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer {
    display: grid;
    justify-items: center;
    margin-top: 20px;
  }
}

@media (max-width: 380px) {
  .segmented {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .memory-board {
    width: min(100%, 52vh, 340px);
  }
}

@media (hover: none) {
  .memory-tile:not(:disabled):hover {
    transform: none;
    filter: none;
    box-shadow: 0 10px 24px rgba(24, 32, 31, 0.14);
  }

  .memory-tile.active {
    transform: translateY(-4px) scale(1.03);
    filter: saturate(1.35) brightness(1.16);
    box-shadow:
      0 0 0 4px #ffffff,
      0 0 0 8px var(--accent),
      0 18px 32px rgba(24, 32, 31, 0.22);
  }
}