input[type="radio"] {
  display: inline;
  margin-right: 6px;
}

.aspect-ratio-container {
  width: 90%;
  max-width: 100%;
  position: relative;
  overflow: hidden;
  margin-left: 15px;
}

.aspect-ratio-container::before {
  content: "";
  display: block;
  padding-top: 75%;
}

.calculator {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow-y: auto;
  overflow-x: hidden;
  box-sizing: border-box;
}

/* === Reset and Base Styles === */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Tahoma, sans-serif;
  font-size: 16px;
  background-color: #1c1f26;
  color: #f0f0f0;
  line-height: 1.6;
  padding: 2rem;
}

h1 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #90caf9;
}

h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-size: 1.4rem;
  color: #ffcc80;
}

/* === Form Controls === */
input[type="text"],
select {
  padding: 0.4rem 0.6rem;
  border: 1px solid #555;
  background-color: #2b2f3a;
  color: #f0f0f0;
  border-radius: 4px;
  margin: 0.25rem 0.5rem;
}

input[type="radio"],
input[type="checkbox"] {
  margin-right: 0.25rem;
}

label {
  margin-right: 1rem;
}

button {
  padding: 0.5rem 1rem;
  background-color: #42a5f5;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 1rem;
  transition: background-color 0.2s ease-in-out;
}

button:enabled:hover {
  background-color: #1e88e5;
}

button:disabled {
  background-color: #cccccc; /* A typical gray for disabled elements */
  color: #666666;
  cursor: not-allowed; /* Shows a 'not-allowed' cursor on hover */
}

/* === Layout for Calculator and R² Display === */
.aspect-ratio-container {
  width: 100%;
  height: 80%;
  margin-top: 2rem;
  border: 1px solid #333;
  border-radius: 8px;
  background-color: #000;
}

.calculator {
  width: 100%;
}

#r_squared {
  display: inline-block;
  font-weight: bold;
  color: #81c784;
  margin-left: 0.5rem;
}

/* === Responsive === */
@media (max-width: 768px) {
  body {
    padding: 1rem;
  }

  .aspect-ratio-container {
    padding-bottom: 75%;
  }

  input[type="text"] {
    width: 80px;
  }
}

/* === Orbital Parameters === */
.parameter {
  margin-bottom: 0.5rem;
  display: inline-block;
  width: 150px;
}

.parameter-label {
  width: 245px; 
  display: inline-block; 
  vertical-align: middle; 
}

.parameter input[type="text"] {
  vertical-align: middle;
}

/* === Checkbox and Radio Layout === */
input[type="radio"] + label,
input[type="checkbox"] + label {
  margin-right: 1rem;
}