:root {
  --blue: #3a5fcd; /* calm, peaceful blue */
  --dark: #000000; /* pure black */
  --card-bg: #121822; /* very dark, not full black to soften cards */
  --text-color: #e0e6f3; /* soft white */
  --info-text: #a0aedb; /* gentle blueish gray */
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--dark);
  color: var(--text-color);
  min-height: 100vh;
}

header {
  background-color: var(--blue);
  padding: 1.2rem;
  text-align: center;
  color: white;
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  user-select: none;
}

.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1rem;
  padding: 2rem;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid #223355; /* subtle border */
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: background-color 0.25s ease;
  border-radius: 0; /* sharp edges */
}

.card:hover {
  background-color: #2c3a72; /* subtle blue shade on hover */
}

.card img {
  width: 100%;
  height: 120px;
  object-fit: contain;
  background-color: var(--dark);
  border-bottom: 1px solid #223355;
}

.card .info {
  padding: 0.8rem 1rem;
  text-align: center;
}

.card .info h4 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
  color: var(--blue);
  font-weight: 600;
}

.card .info p {
  font-size: 0.8rem;
  color: var(--info-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Heart icon style */
#heart {
  position: absolute;
  top: 10px;
  right: 12px;
  font-size: 1.4rem;
  color: white;
  opacity: 0.75;
  transition: color 0.3s ease, transform 0.2s ease;
  user-select: none;
}

#heart:hover {
  color: var(--blue);
  transform: scale(1.2);
  cursor: pointer;
}

.card {
  /* existing styles... */
  transition: background-color 0.25s ease, box-shadow 0.3s ease, transform 0.1s ease;
  box-shadow: none; /* start with no shadow */
}

.card:hover {
  background-color: #2c3a72; /* subtle blue shade on hover */
  box-shadow: 0 6px 12px rgba(58, 95, 205, 0.4); /* solid shadow, no blur */
}

.card:active {
  transform: scale(0.97); /* press effect */
  box-shadow: 0 3px 6px rgba(58, 95, 205, 0.6);
}