:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f8f3e8;
  color: #26312c;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  background:
    radial-gradient(circle at 14% 12%, rgba(255, 255, 255, 0.78), transparent 24%),
    linear-gradient(135deg, #f8f3e8, #edf6ee 46%, #f4e6dc);
}

button,
select {
  min-height: clamp(2.05rem, 5.8vh, 2.45rem);
  border-radius: 8px;
  border: 1px solid rgba(62, 87, 72, 0.22);
  font: inherit;
}

button {
  background: #fffdf7;
  color: #26312c;
  font-weight: 800;
  cursor: pointer;
}

button:disabled {
  cursor: default;
  opacity: 1;
}

button:focus-visible,
select:focus-visible,
.memory-card:focus-visible {
  outline: 3px solid #f0b84f;
  outline-offset: 2px;
}

.primary-button {
  border-color: #2f6f59;
  background: #2f6f59;
  color: #fffdf7;
}

.game-app {
  width: min(100%, 980px);
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  margin: 0 auto;
  padding: clamp(0.5rem, 1.7vw, 0.95rem);
  display: grid;
}

.screen {
  display: none;
  min-height: 0;
  overflow: hidden;
}

.screen.is-active {
  display: grid;
  height: 100%;
  min-height: 0;
  gap: clamp(0.45rem, 1.2vh, 0.75rem);
  overflow: hidden;
}

#title-screen.screen.is-active,
#result-screen.screen.is-active {
  align-content: center;
  place-items: center;
}

#play-screen.screen.is-active {
  grid-template-rows: auto minmax(0, 1fr) auto;
  align-content: stretch;
}

.hero,
.result-box {
  width: min(100%, 42rem);
  max-height: 100%;
  margin: 0 auto;
  border: 1px solid rgba(62, 87, 72, 0.18);
  border-radius: 8px;
  background: rgba(255, 253, 247, 0.9);
  padding: clamp(0.9rem, 3vw, 1.55rem);
  box-shadow: 0 1.4rem 3rem rgba(62, 87, 72, 0.14);
  overflow: hidden;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: #2f6f59;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(1.7rem, 6vh, 3.05rem);
}

h2 {
  font-size: clamp(1.18rem, 3.5vh, 1.75rem);
}

.lead,
.note,
.status {
  color: #5f6b62;
  line-height: 1.48;
}

.lead {
  margin: 0.55rem 0 0;
}

.note {
  margin: 0.7rem 0 0;
  font-size: clamp(0.78rem, 2.1vh, 0.94rem);
}

.status {
  margin: 0;
  min-height: 1.35em;
  font-size: clamp(0.78rem, 2vh, 0.95rem);
}

.select-row {
  display: grid;
  gap: 0.4rem;
  margin: 0.85rem 0 0.65rem;
  font-weight: 800;
}

.hud {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(18rem, 2fr) auto;
  align-items: center;
  gap: clamp(0.45rem, 1.4vw, 0.75rem);
  border: 1px solid rgba(62, 87, 72, 0.16);
  border-radius: 8px;
  background: rgba(255, 253, 247, 0.86);
  padding: clamp(0.48rem, 1.45vw, 0.72rem);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.35rem, 1vw, 0.5rem);
  margin: 0;
}

.stats div {
  border-radius: 8px;
  background: rgba(237, 246, 238, 0.9);
  padding: clamp(0.42rem, 1.1vw, 0.58rem);
}

.stats dt {
  color: #68736d;
  font-size: 0.72rem;
  font-weight: 800;
}

.stats dd {
  margin: 0.1rem 0 0;
  font-size: clamp(0.92rem, 2.7vh, 1.28rem);
  font-weight: 950;
}

.card-grid {
  --card-columns: 5;
  --card-rows: 4;
  --board-ratio: 0.893;
  display: grid;
  grid-template-columns: repeat(var(--card-columns), minmax(0, 1fr));
  grid-template-rows: repeat(var(--card-rows), minmax(0, 1fr));
  width: min(100%, calc((100dvh - clamp(7.2rem, 20vh, 9.8rem)) * var(--board-ratio)));
  height: min(100%, calc(100dvh - clamp(7.2rem, 20vh, 9.8rem)));
  min-height: 0;
  justify-self: center;
  align-self: center;
  gap: clamp(0.28rem, 1.05vh, 0.55rem);
  align-items: stretch;
}

.memory-card {
  position: relative;
  display: grid;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  min-height: 0;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid rgba(40, 86, 69, 0.18);
  border-radius: 8px;
  background: #194f40;
  color: #26312c;
  padding: 0;
  box-shadow:
    0 0.7rem 1.35rem rgba(38, 57, 47, 0.16),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  transform: translateY(0);
  transition: transform 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.memory-card:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow:
    0 0.9rem 1.55rem rgba(38, 57, 47, 0.2),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.card-back,
.card-face {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  transition: opacity 140ms ease, transform 140ms ease, visibility 140ms ease;
}

.card-back {
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 28% 24%, rgba(255, 255, 255, 0.16), transparent 18%),
    radial-gradient(circle at 72% 76%, rgba(255, 255, 255, 0.13), transparent 20%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.08) 0 4px, transparent 4px 11px),
    linear-gradient(145deg, #2f7a62, #195241 58%, #123b31);
}

.card-back::before {
  content: "";
  position: absolute;
  inset: 10%;
  border: 2px solid rgba(255, 253, 247, 0.34);
  border-radius: 7px;
  box-shadow: inset 0 0 0 1px rgba(21, 66, 53, 0.42);
}

.card-back::after {
  content: "";
  position: absolute;
  inset: 22%;
  border-radius: 999px;
  background:
    linear-gradient(90deg, transparent 44%, rgba(255, 253, 247, 0.22) 44% 56%, transparent 56%),
    linear-gradient(0deg, transparent 44%, rgba(255, 253, 247, 0.22) 44% 56%, transparent 56%);
  opacity: 0.62;
  transform: rotate(45deg);
}

.card-back-mark {
  position: relative;
  z-index: 1;
  display: grid;
  width: 38%;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(255, 253, 247, 0.3);
  border-radius: 999px;
  background: rgba(16, 55, 45, 0.24);
  color: rgba(255, 253, 247, 0.86);
  font-size: clamp(1.2rem, 4vw, 2.25rem);
  font-weight: 950;
}

.card-face {
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 50%, rgba(240, 184, 79, 0.07), transparent 32%),
    linear-gradient(145deg, #fffefa, #fbf5ea 62%, #efe5d6);
  box-shadow:
    inset 0 0 0 1px rgba(65, 74, 68, 0.1),
    inset 0 0 0 0.45rem rgba(255, 255, 255, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: scale(0.96);
}

.card-face::before {
  content: "";
  position: absolute;
  inset: 13%;
  border: 1px solid rgba(65, 74, 68, 0.08);
  border-radius: 7px;
}

.card-corner {
  position: absolute;
  display: grid;
  justify-items: center;
  gap: 0.05rem;
  font-size: clamp(0.44rem, 1.55vh, 0.78rem);
  font-weight: 950;
  line-height: 0.95;
}

.card-corner-top {
  top: clamp(0.3rem, 1vh, 0.48rem);
  left: clamp(0.3rem, 1vh, 0.48rem);
}

.card-corner-bottom {
  right: clamp(0.3rem, 1vh, 0.48rem);
  bottom: clamp(0.3rem, 1vh, 0.48rem);
  transform: rotate(180deg);
}

.card-center {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  gap: 0.12rem;
}

.memory-card.is-open,
.memory-card.is-matched {
  border-color: rgba(65, 74, 68, 0.16);
  background: #fffefa;
}

.memory-card.is-open .card-back,
.memory-card.is-matched .card-back {
  opacity: 0;
  visibility: hidden;
  transform: scale(1.04);
}

.memory-card.is-open .card-face,
.memory-card.is-matched .card-face {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.memory-card.is-matched {
  border-color: rgba(211, 169, 74, 0.72);
  box-shadow:
    0 0.65rem 1.2rem rgba(62, 87, 72, 0.12),
    0 0 0 3px rgba(211, 169, 74, 0.26);
}

.memory-card.is-matched .card-face {
  background:
    linear-gradient(145deg, #fffefa, #fbf4e6 62%, #f1dfba);
}

.memory-card.is-matched .card-face::after {
  content: "";
  position: absolute;
  inset: 0.45rem;
  border: 1px solid rgba(211, 169, 74, 0.42);
  border-radius: 7px;
  pointer-events: none;
}

.card-rank {
  font-size: clamp(1.1rem, 4.9vh, 2.25rem);
  font-weight: 950;
  line-height: 0.9;
}

.card-suit {
  font-size: clamp(0.92rem, 4vh, 1.9rem);
  font-weight: 950;
  line-height: 0.85;
}

.card-suit-red {
  color: #b94145;
}

.card-suit-black {
  color: #1e2e2a;
}

.result-actions,
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.result-actions button,
.toolbar button {
  padding-inline: 1rem;
}

@media (max-width: 760px) {
  .hud {
    grid-template-columns: 1fr;
  }

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

  .card-grid {
    width: min(100%, calc((100dvh - clamp(12rem, 34vh, 15rem)) * var(--board-ratio)));
    height: min(100%, calc(100dvh - clamp(12rem, 34vh, 15rem)));
  }
}