style.css

/* Resetting and global styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #D9E4EC, #F5F7FA); /* Soft gradient background */
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: #333;
  position: relative;
}

/* Container styles for the content */
.container {
  background: #ffffff;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1); /* Soft shadow for elevation */
  padding: 40px;
  width: 100%;
  max-width: 600px;
  text-align: center;
  margin: 0 20px;
}

/* Header section */
header {
  border-bottom: 2px solid #333; /* Header border */
  padding-bottom: 15px;
  margin-bottom: 20px;
}

/* Form styles */
input, select {
  padding: 12px;
  margin: 10px 0;
  width: 100%;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #E0E0E0;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

input:focus, select:focus {
  border: 1px solid #4CAF50;
  outline: none;
  box-shadow: 0 0 8px rgba(0, 180, 50, 0.2);
}

/* Styling for currency selectors */
.currency-selectors {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

span {
  font-size: 18px;
  font-weight: 500;
  color: #555;
}

/* Button styles */
button {
  padding: 12px 20px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 8px;
  width: 100%;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #45a049;
}

/* Result box styles */
#result {
  margin-top: 20px;
  font-size: 20px;
  font-weight: bold;
  color: #333;
  background-color: #f4f4f4;
  padding: 15px;
  border-radius: 8px;
  text-transform: uppercase;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Footer section styles */
footer {
  border-top: 2px solid #333; /* Footer border */
  padding-top: 15px;
  margin-top: 20px;
}

/* Responsiveness for mobile screens */
@media (max-width: 768px) {
  .container {
    padding: 30px;
    max-width: 100%;
  }
  
  h1 {
    font-size: 1.5rem;
  }

  input, select {
    font-size: 14px;
  }

  button {
    font-size: 16px;
  }
}

/* Responsiveness for larger screens */
@media (min-width: 769px) {
  .container {
    max-width: 700px;
  }

  h1 {
    font-size: 2.5rem;
  }

  input, select {
    font-size: 18px;
  }

  button {
    font-size: 20px;
  }
}