:root {
  --warna-utama: #ff4081;
  --warna-latar: #fefefe;
  --warna-teks: #333;
  --warna-kartu: #ffffff;
  --bayangan: rgba(0, 0, 0, 0.05);
  --radius: 10px;
  --font: 'Segoe UI', sans-serif;
}

body {
  font-family: var(--font);
  background-color: var(--warna-latar);
  color: var(--warna-teks);
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 28px;
  color: var(--warna-utama);
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.filter-group input,
.filter-group select {
  flex: 1;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: var(--radius);
  box-shadow: 0 2px 4px var(--bayangan);
}

.card {
  background-color: var(--warna-kartu);
  border: 1px solid #ddd;
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 15px;
  box-shadow: 0 4px 8px var(--bayangan);
  transition: transform 0.2s ease;
  opacity: 0;
  transform: translateY(10px);
  animation: fadeInUp 0.3s ease forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card:hover {
  transform: scale(1.02);
}

.card h2 {
  margin-top: 0;
  color: var(--warna-utama);
}

.card p {
  margin: 6px 0;
  line-height: 1.5;
}

.next-birthday {
  border-left: 6px solid var(--warna-utama);
  background-color: #fff0f5;
}

.countdown {
  margin-top: 12px;
  font-weight: bold;
  color: var(--warna-utama);
  font-size: 16px;
}