:root {
  color-scheme: light;
  --ink: #24211d;
  --muted: #6d665c;
  --paper: #fbfaf6;
  --panel: #ffffff;
  --line: #ded8cc;
  --accent: #28665a;
  --accent-strong: #1e4d45;
  --gold: #b88735;
  --rose: #a95c57;
  --shadow: 0 22px 70px rgba(39, 34, 27, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(120deg, rgba(40, 102, 90, 0.08), transparent 30%),
    linear-gradient(300deg, rgba(184, 135, 53, 0.12), transparent 28%),
    var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
}

button,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1120px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(16px, 3vw, 32px);
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: clamp(14px, 2vw, 22px);
}

.topbar,
.status-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.topbar {
  padding-block: 4px;
}

.brand {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(1.7rem, 4vw, 3rem);
  line-height: 1.05;
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.select-wrap {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

select {
  min-height: 32px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 800;
  outline: none;
}

.icon-button,
.primary-button,
.secondary-button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.icon-button {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--panel);
  color: var(--ink);
  font-size: 1.35rem;
  box-shadow: 0 10px 26px rgba(36, 33, 29, 0.08);
}

.icon-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.icon-button:focus-visible,
.primary-button:focus-visible,
.secondary-button:focus-visible,
.memory-card:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(40, 102, 90, 0.28);
  outline-offset: 3px;
}

.status-strip {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 14px 40px rgba(36, 33, 29, 0.07);
}

.status-strip > div {
  min-width: 84px;
  display: grid;
  gap: 2px;
}

.status-label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.status-strip strong {
  font-size: clamp(1.08rem, 3vw, 1.45rem);
  font-variant-numeric: tabular-nums;
}

.board-wrap {
  display: grid;
  align-items: center;
  min-height: 0;
}

.game-board {
  --columns: 4;
  width: min(100%, calc(var(--columns) * 132px + (var(--columns) - 1) * 12px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(var(--columns), minmax(0, 1fr));
  gap: clamp(8px, 1.8vw, 12px);
}

.memory-card {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1.24;
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  perspective: 900px;
  min-width: 0;
  transition: visibility 0s linear 560ms;
}

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

.card-inner {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  transform-style: preserve-3d;
  transition: transform 420ms cubic-bezier(.2, .8, .2, 1), filter 180ms ease;
  box-shadow: var(--shadow);
}

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

.memory-card.is-found .card-inner {
  filter: saturate(0.84) brightness(1.04);
}

.memory-card.is-removing {
  pointer-events: none;
}

.memory-card.is-3d-removed .card-inner {
  display: none;
}

.memory-card.is-removing .match-remove-face {
  opacity: 0;
}

.match-remove-face {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(36, 33, 29, 0.12);
  border-radius: var(--radius);
  background: var(--remove-face-color, #e2e0d8);
  box-shadow: var(--shadow);
  opacity: 1;
  pointer-events: none;
  transition: opacity 260ms ease;
}

.memory-card.is-matched {
  opacity: 0;
  pointer-events: none;
}

.memory-card.is-matched {
  visibility: hidden;
}

.card-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  backface-visibility: hidden;
}

.card-back {
  border: 1px solid rgba(48, 42, 30, 0.24);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.16), transparent 38%),
    repeating-linear-gradient(45deg, rgba(48, 43, 35, 0.5) 0 12px, rgba(48, 43, 35, 0.5) 12px 24px, rgba(218, 184, 84, 0.62) 24px 36px, rgba(218, 184, 84, 0.62) 36px 48px),
    linear-gradient(145deg, #40392e, #c8a84e);
}

.card-back::before {
  content: "";
  width: 42%;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 232, 152, 0.72);
  transform: rotate(45deg);
}

.card-front {
  border: 1px solid rgba(36, 33, 29, 0.12);
  background: var(--card-color, #dfe8e2);
  transform: rotateY(180deg);
}

.card-art {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  padding: clamp(7px, 1.8vw, 12px);
}

.card-art img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: calc(var(--radius) - 2px);
}

.card-symbol {
  display: grid;
  place-items: center;
  width: min(62%, 68px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
  font-size: clamp(1.55rem, 7vw, 2.7rem);
  line-height: 1;
}

.result-dialog {
  width: min(420px, calc(100% - 32px));
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
}

.result-dialog::backdrop {
  background: rgba(25, 23, 20, 0.46);
  backdrop-filter: blur(3px);
}

.result-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.result-panel h2 {
  font-size: 1.55rem;
}

.result-summary {
  margin: 12px 0 20px;
  color: var(--muted);
  line-height: 1.7;
}

.result-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.primary-button,
.secondary-button {
  min-height: 44px;
  padding: 0 16px;
  font-weight: 800;
}

.primary-button {
  border-color: var(--accent-strong);
  background: var(--accent);
  color: white;
}

.secondary-button {
  background: #fff;
  color: var(--ink);
}

@media (max-width: 620px) {
  .app-shell {
    min-height: 100svh;
  }

  .topbar {
    align-items: flex-start;
  }

  .controls {
    flex-direction: column;
    align-items: flex-end;
  }

  .status-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .status-strip > div {
    min-width: 0;
  }

  .game-board {
    width: min(100%, calc(100svh - 190px));
  }
}

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