*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #273449;
  --line: rgba(148, 163, 184, 0.16);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #8b5cf6;
  --accent-strong: #7c3aed;
  --accent-light: #a78bfa;
  --accent-soft: rgba(139, 92, 246, 0.2);
  --player-1: #a78bfa;
  --player-2: #fbbf24;
  --danger: #f87171;
  --radius: 12px;
  --shadow: 0 8px 22px -12px rgba(2, 6, 23, 0.9), 0 2px 6px -2px rgba(2, 6, 23, 0.5);
  --speed: 200ms;
  --flip: 250ms;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font);
  line-height: 1.4;
  color: var(--text);
  background:
    radial-gradient(900px 480px at 50% -140px, rgba(139, 92, 246, 0.24), transparent 70%),
    radial-gradient(700px 420px at 50% 110%, rgba(56, 189, 248, 0.07), transparent 70%),
    var(--bg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- Layout ---------- */

.app {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 1120px;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding:
    max(12px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    max(6px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "brand actions"
    "settings settings"
    "stats stats"
    "turn turn";
  align-items: center;
  gap: 10px 12px;
}

.brand {
  grid-area: brand;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.logo {
  flex: none;
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 4px 10px rgba(139, 92, 246, 0.45));
}

.brand h1 {
  margin: 0;
  overflow: hidden;
  font-size: 1.4rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.actions {
  grid-area: actions;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* One equal column per visible tile: the Best tile is hidden in two-player games. */
.stats {
  grid-area: stats;
  display: grid;
  grid-auto-columns: minmax(0, 1fr);
  grid-auto-flow: column;
  gap: 8px;
  margin: 0;
}

.settings {
  grid-area: settings;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

@media (min-width: 640px) {
  .topbar {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-areas:
      "brand actions"
      "stats settings"
      "turn turn";
  }
}

@media (min-width: 1040px) {
  .topbar {
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 300px) auto;
    grid-template-areas:
      "brand stats settings actions"
      "turn turn turn turn";
    gap: 12px 16px;
  }
}

/* ---------- Tiles: stats and selects ---------- */

.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  min-height: 52px;
  padding: 6px 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent), var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.tile dt,
.select-tile > span {
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.tile dd {
  margin: 0;
  overflow: hidden;
  font-size: 1.1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.select-tile {
  cursor: pointer;
  transition: border-color var(--speed) ease, box-shadow var(--speed) ease;
}

.select-tile > span {
  position: absolute;
  top: 7px;
  left: 12px;
  pointer-events: none;
}

.select-tile select {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 22px 32px 5px 12px;
  border: 0;
  border-radius: inherit;
  background: transparent;
  color: var(--text);
  font: 700 1rem/1.3 var(--font);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.select-tile select:focus-visible {
  outline: none;
}

.select-tile option {
  background: var(--surface);
  color: var(--text);
}

.select-tile::after {
  content: "";
  position: absolute;
  right: 15px;
  top: 50%;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: translateY(-30%) rotate(45deg);
  pointer-events: none;
}

.select-tile:hover {
  border-color: rgba(167, 139, 250, 0.45);
}

.select-tile:focus-within {
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 44px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font: 650 0.95rem/1 var(--font);
  white-space: nowrap;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background-color var(--speed) ease, border-color var(--speed) ease, transform var(--speed) ease, filter var(--speed) ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  background: var(--surface-hover);
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  border-color: rgba(255, 255, 255, 0.12);
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: #fff;
  box-shadow: 0 10px 24px -10px rgba(139, 92, 246, 0.9);
}

.btn-primary:hover {
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  filter: brightness(1.1);
}

.btn-lang {
  padding: 0 12px;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.btn:focus-visible,
.card:focus-visible,
.footer a:focus-visible {
  outline: 3px solid var(--accent-light);
  outline-offset: 3px;
}

/* ---------- Turn bar ---------- */

.turnbar {
  grid-area: turn;
  display: flex;
  justify-content: center;
  min-height: 34px;
}

.progress-row,
.players-row {
  width: min(100%, 480px);
}

.progress-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.turn-label {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.progress {
  flex: 1;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.16);
}

.progress-fill {
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), #c084fc);
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.6);
  transition: width 250ms ease;
}

.pairs-value {
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
}

.players-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.player {
  --player: var(--player-1);
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
  transition: border-color var(--speed) ease, box-shadow var(--speed) ease, color var(--speed) ease;
}

.player[data-player="1"] {
  --player: var(--player-2);
}

.player .dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--player);
}

.player .name {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.player .score {
  margin-left: auto;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.player.is-active {
  border-color: var(--player);
  color: var(--text);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--player) 22%, transparent), var(--shadow);
}

/* ---------- Board and cards ---------- */

.play {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.board-wrap {
  flex: 1 1 0;
  min-height: 260px;
  display: grid;
  place-items: center;
  container-type: size;
}

.board {
  --cols: 4;
  --rows: 4;
  --ratio: 0.82;
  --gap: clamp(6px, 1.8cqmin, 14px);
  --card-w: min(
    (100cqw - (var(--cols) - 1) * var(--gap)) / var(--cols),
    var(--ratio) * (100cqh - (var(--rows) - 1) * var(--gap)) / var(--rows),
    150px
  );
  --card-radius: min(12px, var(--card-w) * 0.16);
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--card-w));
  grid-auto-rows: calc(var(--card-w) / var(--ratio));
  gap: var(--gap);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.card {
  position: relative;
  display: block;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: var(--card-radius);
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  perspective: 900px;
  -webkit-tap-highlight-color: transparent;
}

.card-inner {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  transform: translateY(0) rotateY(0deg);
  transform-style: preserve-3d;
  transition: transform var(--flip) cubic-bezier(0.3, 0.7, 0.4, 1);
}

.card.is-up .card-inner {
  transform: translateY(0) rotateY(180deg);
}

.card-back,
.card-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: inherit;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.card-back {
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(255, 255, 255, 0.24), transparent 55%),
    linear-gradient(150deg, var(--accent) 0%, #6d28d9 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14), var(--shadow);
  transition: filter var(--speed) ease;
}

.card-back::before {
  content: "";
  position: absolute;
  inset: 8%;
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  border-radius: calc(var(--card-radius) * 0.6);
}

.card-back::after {
  content: "";
  width: 30%;
  aspect-ratio: 1;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 26%;
  background: rgba(255, 255, 255, 0.1);
  transform: rotate(45deg);
}

.card-face {
  transform: rotateY(180deg);
  background: linear-gradient(155deg, #26344d, #172033);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.2), var(--shadow);
  transition: box-shadow var(--speed) ease, background-color var(--speed) ease;
}

.card-face svg {
  width: 72%;
  height: 72%;
  filter: drop-shadow(0 0 7px color-mix(in srgb, var(--tone) 45%, transparent));
}

.card.is-open .card-face {
  box-shadow: inset 0 0 0 2px var(--accent-light), 0 0 0 3px var(--accent-soft), var(--shadow);
}

.card.is-miss .card-face {
  box-shadow: inset 0 0 0 2px var(--danger), 0 0 18px -6px var(--danger), var(--shadow);
}

.card.is-miss {
  animation: shake 420ms ease 230ms;
}

/* Open and found cards, and every card while a missed pair is shown, cannot be flipped. */
.card[aria-disabled="true"] {
  cursor: default;
}

.card.is-matched .card-face {
  background: linear-gradient(155deg, color-mix(in srgb, var(--tone) 18%, #1e293b), #172033 75%);
  box-shadow:
    inset 0 0 0 1.5px color-mix(in srgb, var(--tone) 60%, transparent),
    0 0 22px -8px var(--tone),
    var(--shadow);
}

.card.is-pop {
  animation: pop 420ms ease 200ms;
}

.card[data-owner]::after {
  content: "";
  position: absolute;
  top: 8%;
  right: 8%;
  z-index: 1;
  width: max(7px, 11%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--player-1);
  box-shadow: 0 0 0 2px #172033;
}

.card[data-owner="1"]::after {
  background: var(--player-2);
}

@media (hover: hover) {
  .card[aria-disabled="false"]:hover .card-inner {
    transform: translateY(-3px) rotateY(0deg);
  }

  .card[aria-disabled="false"]:hover .card-back {
    filter: brightness(1.12);
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}

@keyframes pop {
  0%, 100% { transform: scale(1); }
  45% { transform: scale(1.07); }
}

/* ---------- Footer ---------- */

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0 16px;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer p {
  margin: 0;
}

.footer a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 2px;
  color: var(--accent-light);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

@media (hover: none), (max-width: 639px) {
  .hint {
    display: none;
  }

  .footer {
    justify-content: center;
  }
}

/* ---------- Win overlay ---------- */

.win {
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 16px;
  overflow: hidden;
  border: 0;
  background: transparent;
  color: var(--text);
}

.win[open] {
  display: grid;
  place-items: center;
}

.win::backdrop {
  background: rgba(2, 6, 23, 0.68);
  backdrop-filter: blur(4px);
}

.win-card {
  position: relative;
  z-index: 1;
  width: min(100%, 380px);
  padding: 28px 22px 22px;
  text-align: center;
  background:
    radial-gradient(120% 70% at 50% 0%, rgba(139, 92, 246, 0.22), transparent 60%),
    var(--surface);
  border: 1px solid rgba(167, 139, 250, 0.35);
  border-radius: var(--radius);
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.85);
  animation: rise 250ms ease;
}

.win-card h2 {
  margin: 0;
  font-size: 1.8rem;
  letter-spacing: -0.02em;
}

.win-badge {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(251, 191, 36, 0.16);
  color: #fcd34d;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.win-text {
  margin: 6px 0 18px;
  color: var(--muted);
}

.win-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 20px;
  text-align: left;
}

.win-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.win-actions .btn {
  flex: 1 1 120px;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
}

.confetti {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.confetti span {
  position: absolute;
  top: -24px;
  left: var(--x);
  width: var(--size);
  height: var(--size);
  background: var(--color);
  animation: fall var(--duration) linear var(--delay) both;
}

.confetti .is-circle {
  border-radius: 50%;
}

.confetti .is-triangle {
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

.confetti .is-strip {
  height: calc(var(--size) * 0.45);
  border-radius: 2px;
}

@keyframes fall {
  from { transform: translate3d(0, 0, 0) rotate(0deg); }
  to { transform: translate3d(var(--drift), 110vh, 0) rotate(var(--spin)); }
}

/* ---------- Small and short screens ---------- */

@media (max-width: 359px) {
  .logo {
    width: 30px;
    height: 30px;
  }

  .brand h1 {
    font-size: 1.2rem;
  }

  .btn {
    padding: 0 12px;
  }

  #new-game svg {
    display: none;
  }
}

/* Short screens: squarer cards so the 6x6 board keeps 40 px tap targets. */
@media (max-height: 600px) {
  .board {
    --ratio: 0.92;
  }
}

/* Short portrait phones: a tighter header leaves more height for the board. */
@media (orientation: portrait) and (max-height: 600px) {
  .app {
    gap: 8px;
    padding-top: max(8px, env(safe-area-inset-top));
  }

  .topbar {
    gap: 6px 8px;
  }

  .tile {
    min-height: 44px;
    padding: 3px 10px;
  }

  .tile dd {
    font-size: 1rem;
  }

  .select-tile > span {
    top: 5px;
  }

  .select-tile select {
    padding-top: 19px;
    padding-bottom: 3px;
  }

  .turnbar {
    min-height: 30px;
  }
}

/* Landscape phones: the controls move to a side column, so the board gets the full height. */
@media (orientation: landscape) and (max-height: 560px) {
  .app {
    display: grid;
    grid-template-columns: clamp(240px, 42vw, 300px) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr);
    grid-template-areas:
      "top play"
      "foot play";
    gap: 8px 16px;
    padding-top: max(8px, env(safe-area-inset-top));
  }

  .topbar {
    grid-area: top;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "brand" "actions" "stats" "settings" "turn";
    gap: 8px;
  }

  .actions .btn-primary {
    flex: 1;
  }

  .stats .tile {
    padding: 6px 8px;
  }

  .stats dd {
    font-size: 1rem;
  }

  .play {
    grid-area: play;
  }

  .footer {
    grid-area: foot;
    align-self: end;
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .confetti {
    display: none;
  }
}