*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  font-family: 'Segoe UI', system-ui, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 3rem;
}

header {
  text-align: center;
  margin-bottom: 2.5rem;
}

header h1 {
  font-size: 2.6rem;
  color: #fff;
  letter-spacing: 0.02em;
  text-shadow: 0 0 20px rgba(150, 100, 255, 0.7);
}

header p {
  color: #a89cc8;
  margin-top: 0.5rem;
  font-size: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 860px;
  width: 100%;
}

.card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 1.5rem 1.2rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  user-select: none;
  min-height: 200px;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(120, 80, 255, 0.35);
  background: rgba(255, 255, 255, 0.09);
}

.card:active {
  transform: translateY(-1px);
}

.card img {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
}

.card .setup {
  color: #e8e0ff;
  font-size: 0.95rem;
  text-align: center;
  line-height: 1.5;
  font-style: italic;
  transition: opacity 0.25s ease;
}

.card .punchline {
  display: none;
  color: #b3ff6e;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.5;
  animation: pop-in 0.25s ease;
}

.card.revealed .setup {
  opacity: 0.35;
  font-size: 0.78rem;
}

.card.revealed .punchline {
  display: block;
}

.card .tap-hint {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: opacity 0.2s ease;
}

.card.revealed .tap-hint {
  opacity: 0;
}

@keyframes pop-in {
  0%   { transform: scale(0.8); opacity: 0; }
  60%  { transform: scale(1.08); }
  100% { transform: scale(1);   opacity: 1; }
}

footer {
  margin-top: 2.5rem;
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.8rem;
  text-align: center;
}

@media (max-width: 620px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 400px) {
  .grid {
    grid-template-columns: 1fr;
  }
}