:root {
  --paper: #f7f2e8;
  --paper-strong: rgba(255, 249, 238, 0.86);
  --ink: #1f2330;
  --ink-soft: rgba(31, 35, 48, 0.72);
  --coral: #f46b45;
  --teal: #1d7f7a;
  --ochre: #c18f2f;
  --berry: #8e3b63;
  --edge: rgba(31, 35, 48, 0.1);
  --shadow: 0 28px 80px rgba(31, 35, 48, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Avenir Next", "Trebuchet MS", sans-serif;
  color: var(--ink);
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(244, 107, 69, 0.26), transparent 34%),
    radial-gradient(circle at 88% 20%, rgba(29, 127, 122, 0.24), transparent 28%),
    linear-gradient(160deg, #f6eee0 0%, #efe6d7 48%, #f5f0e5 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(31, 35, 48, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 35, 48, 0.04) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at center, black 40%, transparent 85%);
  pointer-events: none;
}

.app-shell {
  position: relative;
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.panel {
  background: var(--paper-strong);
  border: 1px solid var(--edge);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr minmax(300px, 0.95fr);
  gap: 24px;
  align-items: stretch;
  padding: 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  letter-spacing: 0.18em;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.hero h1 {
  margin: 12px 0 10px;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 0.95;
}

.hero-text {
  max-width: 50ch;
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.control-panel {
  display: grid;
  gap: 18px;
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.14));
  border: 1px solid rgba(31, 35, 48, 0.08);
}

.field {
  display: grid;
  gap: 12px;
}

.field-label {
  font-weight: 700;
}

.select-input {
  min-height: 50px;
  width: 100%;
  padding: 0 16px;
  border: 1px solid rgba(31, 35, 48, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  font: inherit;
}

.select-input:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--coral) 70%, white);
  outline-offset: 2px;
}

.field-summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.98rem;
  color: var(--ink-soft);
}

.primary-button,
.memory-card {
  font: inherit;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    opacity 180ms ease;
}

.primary-button {
  min-height: 54px;
  padding: 14px 18px;
  border: 0;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--coral), #f08750);
  color: #fff9f3;
  font-weight: 700;
  box-shadow: 0 16px 32px rgba(244, 107, 69, 0.28);
}

.primary-button:hover,
.primary-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 22px 38px rgba(244, 107, 69, 0.32);
}

.primary-button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
  transform: none;
  box-shadow: none;
}

.hint {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.status-card {
  padding: 18px 22px;
}

.status-label {
  display: block;
  margin-bottom: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.status-value {
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.playfield {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.8fr);
  gap: 18px;
  margin-top: 24px;
  align-items: start;
}

.board-panel,
.round-status {
  padding: 22px;
}

.answers-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  flex-wrap: wrap;
}

.memory-board {
  --board-columns: 4;
  --board-columns-narrow: 4;
  display: grid;
  grid-template-columns: repeat(var(--board-columns), minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.memory-card {
  position: relative;
  aspect-ratio: 0.78;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  perspective: 1100px;
}

.memory-card:hover,
.memory-card:focus-visible {
  transform: translateY(-2px);
}

.memory-card:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--coral) 65%, white);
  outline-offset: 4px;
}

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

.memory-card:disabled:hover,
.memory-card:disabled:focus-visible {
  transform: none;
}

.memory-card-inner {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transition: transform 260ms ease;
}

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

.memory-card-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 12px;
  border-radius: 24px;
  backface-visibility: hidden;
  border: 1px solid rgba(31, 35, 48, 0.08);
  overflow: hidden;
}

.memory-card-back {
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.45), transparent 38%),
    linear-gradient(145deg, color-mix(in srgb, var(--berry) 32%, white), color-mix(in srgb, var(--teal) 30%, white));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.34),
    0 16px 30px rgba(31, 35, 48, 0.12);
}

.memory-card-back::before {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.16) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.16) 50%, rgba(255, 255, 255, 0.16) 75%, transparent 75%),
    linear-gradient(135deg, rgba(31, 35, 48, 0.08), transparent 48%);
  background-size: 20px 20px, auto;
}

.memory-card-front {
  transform: rotateY(180deg);
  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--symbol-accent, var(--teal)) 16%, rgba(255, 255, 255, 0.95)),
    rgba(255, 255, 255, 0.62)
  );
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.54),
    0 18px 30px rgba(31, 35, 48, 0.08);
}

.memory-card.is-matched .memory-card-front {
  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--teal) 22%, white),
    color-mix(in srgb, var(--symbol-accent, var(--teal)) 12%, rgba(255, 255, 255, 0.75))
  );
  box-shadow:
    inset 0 0 0 2px color-mix(in srgb, var(--teal) 60%, white),
    0 18px 30px rgba(29, 127, 122, 0.14);
}

.memory-card-symbol {
  width: calc(100% * var(--symbol-width, 1));
  font-weight: var(--symbol-weight, 700);
  font-size: min(calc(clamp(1.9rem, 4vw, 3.8rem) * var(--symbol-scale, 1)), 72px);
  line-height: 1;
  text-align: center;
}

.card-back-mark {
  position: relative;
  z-index: 1;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: rgba(255, 249, 238, 0.92);
  text-shadow: 0 10px 20px rgba(31, 35, 48, 0.18);
}

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

.memory-card.is-placeholder .memory-card-face {
  backface-visibility: visible;
}

.memory-card.is-placeholder .memory-card-inner {
  transform: none;
}

.round-status {
  display: grid;
  gap: 12px;
  align-content: start;
}

.feedback {
  min-height: 24px;
  margin: 0;
  line-height: 1.6;
  color: var(--ink-soft);
}

.result-banner {
  margin-top: 18px;
  padding: 22px 24px;
  background: linear-gradient(135deg, rgba(29, 127, 122, 0.14), rgba(255, 255, 255, 0.8));
}

.result-banner strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.18rem;
}

.result-banner p {
  margin: 0;
}

.empty-state {
  display: grid;
  grid-column: 1 / -1;
  place-items: center;
  min-height: 200px;
  padding: 18px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.46);
  border: 1px dashed rgba(31, 35, 48, 0.12);
  color: var(--ink-soft);
  text-align: center;
}

.hidden {
  display: none;
}

@media (max-width: 940px) {
  .hero,
  .playfield {
    grid-template-columns: 1fr;
  }

  .app-shell {
    width: min(100vw - 20px, 760px);
    padding-top: 20px;
  }

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

@media (max-width: 640px) {
  .app-shell {
    width: min(100vw - 12px, 760px);
    padding: 10px 0 14px;
  }

  .hero,
  .board-panel,
  .round-status,
  .status-card {
    padding: 14px;
  }

  .hero h1 {
    font-size: clamp(2.3rem, 12vw, 3.4rem);
  }

  .status-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 12px;
  }

  .status-label {
    margin-bottom: 6px;
    font-size: 0.63rem;
    letter-spacing: 0.12em;
  }

  .status-value {
    font-size: clamp(0.95rem, 4.5vw, 1.2rem);
  }

  .playfield {
    margin-top: 16px;
    gap: 10px;
  }

  .memory-board {
    gap: 8px;
    margin-top: 14px;
  }

  .memory-card-face {
    border-radius: 18px;
    padding: 8px;
  }

  .memory-card-back::before {
    inset: 8px;
    border-radius: 12px;
  }

  .memory-card-symbol {
    font-size: min(calc(clamp(1.45rem, 10vw, 2.3rem) * var(--symbol-scale, 1)), 56px);
  }

  .feedback {
    min-height: 18px;
    font-size: 0.82rem;
    line-height: 1.35;
  }

  body.game-active {
    overflow-y: auto;
  }

  body.game-active .app-shell {
    min-height: 100svh;
    padding: 8px 0 12px;
  }

  body.game-active .hero-copy,
  body.game-active .field-summary,
  body.game-active .hint {
    display: none;
  }

  body.game-active .hero {
    gap: 10px;
    padding: 10px 12px;
  }

  body.game-active .control-panel {
    gap: 10px;
    padding: 12px;
  }

  body.game-active .select-input,
  body.game-active .primary-button {
    min-height: 46px;
  }

  body.game-active .status-grid,
  body.game-active .playfield,
  body.game-active .result-banner {
    margin-top: 8px;
  }

  body.game-active .memory-board {
    gap: 6px;
  }

  body.game-active .memory-card-symbol {
    font-size: min(calc(clamp(1.2rem, 8.2vw, 1.9rem) * var(--symbol-scale, 1)), 44px);
  }

  body.game-active .result-banner {
    padding: 10px 12px;
  }
}

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