:root {
  --bg-start: #C2673B;
  --bg-end: #E39A63;
  --card-front: #F4E7D6;
  --term-back: #3A2468; /* roxo escuro */
  --def-back: #2A7F7F;  /* teal/verde */
  --text: #111;
  --muted: #6b6b6b;
  --disabled-opacity: 0.35;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Noto Sans", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: #fff; /* cleaner, higher-contrast background */
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 16px 20px;
  color: #111;
}
.topbar h1 { margin: 0; font-weight: 700; letter-spacing: 0.2px; }
.stats { display: flex; gap: 16px; align-items: center; }
.stat { background: #f2f2f2; padding: 8px 12px; border-radius: 10px; }
.btn {
  background: #111;
  color: #fff;
  border: none;
  padding: 10px 14px;
  border-radius: 10px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.grid {
  width: 100%;
  max-width: 1280px;
  margin: 20px auto;
  padding: 0 16px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 640px) { .grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px) { .grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 1200px) { .grid { grid-template-columns: repeat(5, 1fr); } }

.card {
  perspective: 1000px;
  height: auto;
  min-height: 220px;
}
.card button {
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
}
.card-inner {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 480ms cubic-bezier(.2,.7,.2,1);
}
.card.flipped .card-inner { transform: rotateY(180deg); }
.card.disabled { opacity: var(--disabled-opacity); pointer-events: none; }

.face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}
.face.back {
  color: #fff;
  font-weight: 700;
  gap: 8px;
}
.face.back.term { background: var(--term-back); }
.face.back.def { background: var(--def-back); }
.face.front {
  background: var(--card-front);
  transform: rotateY(180deg);
  color: var(--text);
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 10px;
  align-items: start;
  padding: 14px; /* slightly more padding */
}

.badge {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 18px;
}
.badge.term { background: var(--term-back); }
.badge.def { background: var(--def-back); }

.front-content {
  overflow: visible;
}
.front-content .title {
  font-weight: 700;
  font-size: 19px;
  line-height: 1.2;
  margin-bottom: 6px;
}
.front-content .definition {
  font-size: 14px;
  line-height: 1.25;
  color: #333;
  overflow-wrap: anywhere; /* garante quebra e evita corte/reticências */
}

.front-thumb {
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: 6px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.25);
}

.legend {
  max-width: 1280px;
  margin: 6px auto 16px;
  padding: 0 16px;
  color: #fff;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(255,255,255,0.14);
}
.legend-item.term .emoji { color: #cfc8ff; }
.legend-item.def .emoji { color: #c6fff1; }

.instructions {
  max-width: 1000px;
  margin: 0 auto 40px;
  background: rgba(255,255,255,0.18);
  color: #fff;
  padding: 14px 16px;
  border-radius: 12px;
}
.instructions h2 { margin: 0 0 8px; font-size: 18px; }
.instructions ol { margin: 0; padding-left: 20px; }
.instructions li { margin: 4px 0; }

.victory {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(0,0,0,0.5);
}
.victory.show { display: grid; }
.victory-card {
  background: #fff;
  border-radius: 14px;
  padding: 20px;
  width: 90%;
  max-width: 380px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}
.victory-card h3 { margin: 0 0 6px; }
.victory-card p { margin: 0 0 14px; color: #333; }

.card[data-type="term"] .face.front { grid-template-columns: 1fr; padding: 0; }
.card[data-type="term"] .front-thumb {
  position: relative;
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 12px 12px 0 0;
  box-shadow: none;
}
.card[data-type="term"] .front-content { padding: 12px; }
.card[data-type="term"] .badge { position: absolute; top: 8px; left: 8px; }
.card[data-type="term"] .front-content .title { font-size: 18px; }
.card[data-type="term"] .front-content .definition { display: none; }