body .sleep-calculator {
  background: #fff;
  padding: 40px 30px;
  border-radius: 20px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.15);
  max-width: 420px;
  margin: 40px auto;
  border-top: 6px solid #7CB74D;
  text-align: center;
}
.sleep-calculator h2 {
  color: #7CB74D;
  margin-bottom: 15px;
}
.sleep-calculator p {
  color: #666;
  font-size: 15px;
}
.sleep-calculator input, .sleep-calculator button {
  padding: 12px;
  margin: 12px 0;
  font-size: 16px;
  width: 85%;
  border-radius: 10px;
  border: 1px solid #ccc;
  outline: none;
  transition: 0.3s ease;
}
.sleep-calculator input:focus {
  border-color: #7CB74D;
  box-shadow: 0 0 5px rgba(124,183,77,0.4);
}
.sleep-calculator button {
  background: #DC438B;
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: bold;
  letter-spacing: 0.5px;
  transition: 0.3s ease;
}
.sleep-calculator button:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 0 8px rgba(124,183,77,0.6);
}
.sleep-calculator .results {
  margin-top: 25px;
  font-size: 18px;
  font-weight: bold;
  color: #DC438B;
}
.sleep-calculator .results p:first-child {
  font-size: 17px;
  color: #333;
  font-weight: 600;
}