body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  transition: background 0.5s ease-in-out;
  background: url("bg1.jpg") no-repeat center center fixed;
  background-size: cover;
}

.bmi-container {
  backdrop-filter: blur(15px) saturate(180%);
  -webkit-backdrop-filter: blur(15px) saturate(180%);
  background-color: rgba(255, 255, 255, 0.25);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 20px;
  width: 320px;
  text-align: center;

  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

h2 {
  margin-bottom: 15px;
}

input {
  width: 90%;
  padding: 8px;
  margin: 8px 0;
  border: 1px solid #fff;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.2);
  color: #fff; 
  font-weight: bold;
}
input::placeholder {
  color: rgba(255, 255, 255, 0.7);
  font-weight: normal;
}

button {
  padding: 10px;
  background: rgba(255, 255, 255, 0.25);
  color: #000;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
  margin: 5px;
  transition: all 0.3s ease-in-out;
}

button:hover {
  background: rgba(255, 255, 255, 0.4);
}

.controls {
  position: absolute;
  top: 20px;
  display: flex;
  gap: 10px;
}

.result {
  margin-top: 15px;
  font-size: 18px;
  font-weight: bold;
}

.error {
  color: red;
  margin-top: 10px;
  font-size: 14px;
}
.logo {
  position: absolute;
  top: 30px;
  left: 30px;
  width: 150px;
  height: auto;
  cursor: pointer;
}