:root {
  color-scheme: light;
  --paper: #fffaf0;
  --paper-deep: #f4ead6;
  --ink: #23332b;
  --muted: #5d705f;
  --leaf: #4f9b5b;
  --river: #3b8eb4;
  --sun: #efb840;
  --coral: #dd7460;
  --shadow: 0 14px 32px rgba(45, 70, 54, 0.16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  overflow: hidden;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    linear-gradient(120deg, rgba(255, 250, 240, 0.92), rgba(233, 246, 239, 0.9)),
    radial-gradient(circle at 12% 20%, rgba(239, 184, 64, 0.18), transparent 28%),
    radial-gradient(circle at 92% 75%, rgba(59, 142, 180, 0.16), transparent 34%),
    var(--paper);
}

button,
select,
input {
  font: inherit;
}

.app-shell {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  width: 100vw;
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 0 0 auto;
  height: 44px;
  padding: 0 14px;
  border-bottom: 1px solid rgba(56, 82, 62, 0.17);
  background: rgba(255, 250, 240, 0.84);
  backdrop-filter: blur(10px);
}

.brand,
.current-game {
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.game-menu {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}

.current-game {
  white-space: nowrap;
}

.menu-button {
  display: inline-grid;
  width: 32px;
  height: 32px;
  place-items: center;
  gap: 4px;
  padding: 8px;
  border: 0;
  border-radius: 0;
  cursor: pointer;
  background: transparent;
  box-shadow: none;
}

.menu-button span {
  display: block;
  width: 14px;
  height: 2px;
  border-radius: 999px;
  background: var(--ink);
}

.menu-button:focus-visible {
  outline: 3px solid var(--river);
  outline-offset: 2px;
}

.game-list {
  position: absolute;
  z-index: 10;
  inset: calc(100% + 8px) 0 auto auto;
  min-width: 160px;
  padding: 6px;
  border: 1px solid rgba(62, 98, 72, 0.26);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, 0.98);
  box-shadow: var(--shadow);
}

.game-list button {
  width: 100%;
  padding: 8px 10px;
  border: 0;
  border-radius: 6px;
  color: var(--ink);
  font-weight: 800;
  text-align: left;
  cursor: pointer;
  background: rgba(121, 177, 101, 0.16);
}

.game {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-height: 0;
  padding: 8px clamp(8px, 2vw, 18px) clamp(8px, 1.7vw, 16px);
  gap: 8px;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 0 0 28px;
  min-height: 28px;
  padding: 0 14px;
  border-top: 1px solid rgba(56, 82, 62, 0.16);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  background: rgba(255, 250, 240, 0.78);
  backdrop-filter: blur(10px);
}

.control-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1rem, 2.1vw, 1.55rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.mode-picker {
  display: inline-grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 3px;
  min-inline-size: 0;
  margin: 0;
  padding: 3px;
  border: 1px solid rgba(62, 98, 72, 0.25);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
}

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

.mode-picker label {
  min-width: 0;
  cursor: pointer;
}

.mode-picker input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
}

.mode-picker span {
  display: block;
  min-width: 64px;
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-align: center;
}

.mode-picker input:checked + span {
  color: #173121;
  background: linear-gradient(135deg, rgba(239, 184, 64, 0.75), rgba(113, 177, 103, 0.78));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.42);
}

.stats {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
  white-space: nowrap;
}

.stats strong {
  color: var(--ink);
}

.challenge-stat {
  align-items: center;
  gap: 6px;
}

.challenge-stat:not([hidden]) {
  display: inline-flex;
}

.player-score {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border: 1px solid rgba(62, 98, 72, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  transition: background 160ms ease, box-shadow 160ms ease, color 160ms ease;
}

.player-score .player-label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.player-score.is-active {
  color: #173121;
  background: linear-gradient(135deg, rgba(239, 184, 64, 0.85), rgba(113, 177, 103, 0.88));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.42);
}

.player-score.is-active .player-label,
.player-score.is-active strong {
  color: #173121;
}

.reset {
  min-width: 54px;
  padding: 6px 11px;
  border: 0;
  border-radius: 999px;
  color: #173121;
  font-size: 0.82rem;
  font-weight: 900;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: inset 0 0 0 1px rgba(62, 98, 72, 0.27);
}

.info-button {
  display: inline-grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 0;
  border-radius: 999px;
  color: #173121;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.95rem;
  font-style: italic;
  font-weight: 900;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: inset 0 0 0 1px rgba(62, 98, 72, 0.27);
}

.info-button:focus-visible {
  outline: 3px solid var(--river);
  outline-offset: 2px;
}

.board-wrap {
  position: relative;
  display: grid;
  flex: 1 1 auto;
  min-height: 0;
  place-items: center;
}

.board {
  --cols: 4;
  --rows: 2;
  --board-ratio: 8 / 3;
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  grid-template-rows: repeat(var(--rows), minmax(0, 1fr));
  width: auto;
  height: 100%;
  aspect-ratio: var(--board-ratio);
  max-width: 100%;
  max-height: 100%;
  gap: clamp(8px, 1.35vmin, 16px);
  padding: 0;
}

.card {
  position: relative;
  display: block;
  aspect-ratio: 2 / 3;
  min-width: 0;
  min-height: 0;
  border: 0;
  padding: 0;
  perspective: 700px;
  cursor: pointer;
  background: transparent;
}

.card:focus-visible {
  outline: 3px solid var(--river);
  outline-offset: 3px;
  border-radius: var(--radius);
}

.card-inner {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  transform-style: preserve-3d;
  transition: transform 260ms ease;
}

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

.card-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(68, 94, 76, 0.22);
  border-radius: var(--radius);
  backface-visibility: hidden;
  box-shadow: var(--shadow);
}

.card-back {
  background-image: url("assets/eco-card-back.png");
  background-position: center;
  background-size: 100% 100%;
}

.card-back::after {
  content: "";
  position: absolute;
  inset: 8%;
  border: 1px solid rgba(255, 250, 240, 0.7);
  border-radius: 6px;
}

.card-front {
  transform: rotateY(180deg);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.8), rgba(246, 236, 215, 0.9)),
    var(--paper);
}

.art-card,
.definition-card {
  position: relative;
  display: grid;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: inherit;
}

.art-card {
  display: block;
  background: var(--paper);
}

.art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
  user-select: none;
}

.art-label {
  position: absolute;
  inset: auto 0 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  min-height: clamp(28px, 5.8vmin, 58px);
  place-items: center;
  padding: clamp(5px, 0.9vmin, 10px);
  color: #183224;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(0.68rem, 1.1vmin, 1rem);
  font-weight: 850;
  line-height: 1.02;
  text-align: center;
  overflow-wrap: break-word;
  word-break: normal;
  hyphens: auto;
  background: rgba(255, 250, 240, 0.94);
  box-shadow: 0 -1px 0 rgba(68, 94, 76, 0.16);
}

.definition-card {
  display: grid;
  align-content: center;
  gap: clamp(8px, 1vmin, 13px);
  padding: clamp(10px, 1.8vmin, 18px);
  color: #1f3b2b;
  text-align: center;
  background:
    linear-gradient(rgba(255, 250, 240, 0.9), rgba(255, 250, 240, 0.92)),
    radial-gradient(circle at 50% 16%, rgba(239, 184, 64, 0.18), transparent 42%),
    radial-gradient(circle at 20% 85%, rgba(79, 155, 91, 0.2), transparent 36%),
    var(--paper);
}

.term-title {
  min-width: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(0.86rem, 1.45vmin, 1.18rem);
  font-weight: 900;
  line-height: 1.08;
  overflow-wrap: break-word;
  word-break: normal;
  hyphens: auto;
}

.term-description {
  color: #475f4e;
  font-size: clamp(0.68rem, 1.05vmin, 0.92rem);
  font-weight: 750;
  line-height: 1.28;
  overflow-wrap: anywhere;
}

.board[data-mode="hard"] .term-title {
  font-size: clamp(0.58rem, 1.05vmin, 0.9rem);
}

.board[data-mode="hard"] .term-description {
  font-size: clamp(0.48rem, 0.82vmin, 0.72rem);
  line-height: 1.18;
}

.card.is-matched {
  cursor: default;
}

.card.is-matched .card-face {
  border-color: rgba(79, 155, 91, 0.62);
  box-shadow: 0 0 0 2px rgba(122, 184, 103, 0.28), var(--shadow);
}

.win-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: clamp(16px, 4vmin, 36px);
  z-index: 20;
  pointer-events: none;
  background: rgba(23, 49, 33, 0);
  transition: background 220ms ease;
}

.win-overlay[hidden] {
  display: none;
}

.win-overlay.show {
  background: rgba(23, 49, 33, 0.32);
}

.win-card {
  display: grid;
  gap: clamp(6px, 1vmin, 12px);
  max-width: min(92vw, 640px);
  padding: clamp(20px, 4vmin, 40px) clamp(28px, 6vmin, 64px);
  border: 1px solid rgba(62, 98, 72, 0.28);
  border-radius: 22px;
  text-align: center;
  background:
    linear-gradient(160deg, rgba(255, 250, 240, 0.98), rgba(246, 236, 215, 0.98)),
    var(--paper);
  box-shadow: 0 28px 70px rgba(45, 70, 54, 0.32);
  opacity: 0;
  transform: scale(0.85) translateY(8px);
  transition: opacity 240ms ease, transform 240ms cubic-bezier(0.2, 0.8, 0.3, 1.2);
}

.win-overlay.show .win-card {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.win-eyebrow {
  color: var(--leaf);
  font-size: clamp(0.78rem, 1.6vmin, 1.05rem);
  font-weight: 900;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.win-title {
  color: #173121;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.4rem, 3.6vmin, 2.6rem);
  font-weight: 900;
  line-height: 1.12;
  overflow-wrap: anywhere;
}

.confetti {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 19;
}

.confetti-piece {
  position: absolute;
  top: -24px;
  left: var(--x);
  width: var(--w, 9px);
  height: calc(var(--w, 9px) * 1.5);
  border-radius: 2px;
  background: var(--color, var(--leaf));
  opacity: 0;
  animation: confetti-fall var(--duration, 3s) linear var(--delay, 0s) forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg);
    opacity: 0;
  }
  8% {
    opacity: 1;
  }
  100% {
    transform: translate3d(var(--drift, 0), 105vh, 0) rotate(var(--rotate, 720deg));
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .win-card {
    transition: opacity 120ms ease;
    transform: none;
  }

  .confetti-piece {
    display: none;
  }
}

.glossary-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: clamp(12px, 3vmin, 28px);
  z-index: 30;
  background: rgba(23, 49, 33, 0);
  transition: background 200ms ease;
}

.glossary-overlay[hidden] {
  display: none;
}

.glossary-overlay.show {
  background: rgba(23, 49, 33, 0.48);
}

.glossary-card {
  display: grid;
  grid-template-rows: auto 1fr;
  width: min(94vw, 720px);
  max-height: min(90vh, 720px);
  border: 1px solid rgba(62, 98, 72, 0.28);
  border-radius: 18px;
  background:
    linear-gradient(160deg, rgba(255, 250, 240, 0.98), rgba(246, 236, 215, 0.98)),
    var(--paper);
  box-shadow: 0 24px 60px rgba(45, 70, 54, 0.32);
  opacity: 0;
  transform: translateY(12px) scale(0.97);
  transition: opacity 200ms ease, transform 200ms ease;
}

.glossary-overlay.show .glossary-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.glossary-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(62, 98, 72, 0.18);
}

.glossary-header h2 {
  margin: 0;
  color: #173121;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.05rem, 2vmin, 1.35rem);
  font-weight: 900;
}

.glossary-close {
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 999px;
  color: var(--ink);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: inset 0 0 0 1px rgba(62, 98, 72, 0.25);
}

.glossary-close:focus-visible {
  outline: 3px solid var(--river);
  outline-offset: 2px;
}

.glossary-list {
  margin: 0;
  padding: 8px 14px 14px;
  list-style: none;
  overflow-y: auto;
}

.glossary-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: center;
  gap: 12px;
  padding: 10px 4px;
  border-bottom: 1px solid rgba(62, 98, 72, 0.12);
}

.glossary-item:last-child {
  border-bottom: 0;
}

.glossary-thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid rgba(62, 98, 72, 0.2);
}

.glossary-text {
  display: grid;
  gap: 2px;
}

.glossary-term {
  color: #173121;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.98rem;
  font-weight: 900;
  line-height: 1.15;
}

.glossary-detail {
  color: #4a5e51;
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1.32;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@media (max-width: 780px) {
  .topbar {
    height: 40px;
    gap: 8px;
  }

  .game {
    padding: 6px 7px 7px;
    gap: 6px;
  }

  .control-strip {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .control-strip h1 {
    display: none;
  }

  .mode-picker,
  .stats {
    width: 100%;
  }

  .mode-picker span {
    min-width: 0;
    padding: 5px 7px;
  }

  .stats {
    justify-content: space-between;
    gap: 5px;
    font-size: 0.77rem;
  }

  .reset {
    min-width: 48px;
    padding: 5px 9px;
  }

  .board {
    width: min(100%, calc(100vw - 14px));
    height: auto;
  }

  .board[data-mode="hard"] {
    width: auto;
    height: 100%;
    max-width: calc(100vw - 14px);
  }

  .board[data-mode="medium"] .term-description,
  .board[data-mode="hard"] .term-description {
    display: none;
  }

  .board[data-mode="medium"] .definition-card,
  .board[data-mode="hard"] .definition-card {
    align-content: center;
    padding: clamp(4px, 1.4vmin, 12px);
  }

  .board[data-mode="medium"] .term-title {
    font-size: clamp(0.7rem, 1.85vmin, 0.95rem);
    line-height: 1.15;
  }

  .board[data-mode="hard"] .term-title {
    font-size: clamp(0.58rem, 1.45vmin, 0.78rem);
    line-height: 1.1;
  }

  .board[data-mode="hard"] .art-label {
    min-height: 0;
    padding: 4px 3px;
    font-size: clamp(0.52rem, 1.4vmin, 0.7rem);
    line-height: 1.05;
  }

  .board[data-mode="medium"] .art-label {
    padding: 5px 4px;
    font-size: clamp(0.62rem, 1.7vmin, 0.82rem);
    line-height: 1.08;
  }
}

@media (max-height: 620px) and (orientation: landscape) {
  .topbar {
    height: 36px;
  }

  .game {
    padding-top: 5px;
  }

  .control-strip {
    grid-template-columns: minmax(110px, 1fr) auto auto auto;
  }

  .control-strip h1 {
    display: none;
  }

  .mode-picker span,
  .reset {
    padding-top: 4px;
    padding-bottom: 4px;
  }
}