*{
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI';
}

body{
  background: #f4f7f6;
  display: flex;
 justify-content: center;
  align-items: center;
  height: 100vh;
}

.container{
  width: 100%;
  max-width: 500px;
  padding: 20px;
}

.card{
  background: #fff;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.header{
  display: flex;
  gap: 15px;
  margin-bottom: 30px;
}

input, select{
  flex: 1;
  padding: 12px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 16px;
  outline: none;
  transition: 0.3s;
}

input:focus, select:focus{
  border-color: #3498db;
}

.result-section{
  text-align: left;
}

.main-value{
  display: flex;
  align-items: baseline;
  gap: 10px;
}

#res{
  font-size: 48px;
  font-weight: bold;
  color: #2c3e50;
}

.unit{
  font-size: 20px;
  color: #7f8c8d;
  font-weight: 600;
}

.indicator{
  margin-top: 5px;
  font-size: 18px;
  font-weight: 600;
  color: #95a5a6;
}