.container {
  max-width: 900px; /* Breder voor startpagina */
  margin: 0 auto;
}

.calculator-container {
  max-width: 700px;
  margin: 0 auto;
}

.calculator-card {
  background-color: #ffffff;
  border-radius: 15px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  padding: 20px;
  margin-bottom: 20px;
  position: relative;
}

.card {
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card-title {
  color: #2c3e50;
  font-weight: 600;
}

.card-text {
  color: #34495e;
}

.btn-primary {
  background-color: #2e7d32;
  border-color: #2e7d32;
}

.btn-primary:hover {
  background-color: #1b5e20;
  border-color: #1b5e20;
}

.form-label {
  font-weight: 600;
  color: #000000;
}

.form-select, .form-control {
  border-radius: 8px;
  border: 1px solid #ced4da;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-select:hover, .form-control:hover {
  border-color: #2e7d32;
  box-shadow: 0 0 5px rgba(46, 125, 50, 0.3);
}

.alert-success {
  background-color: #c8e6c9;
  border-color: #2e7d32;
  color: #1b5e20;
  font-size: 1.2rem;
  padding: 1rem;
  text-align: center;
}

#playing-handicap, #converted-distance {
  font-weight: 700;
  font-size: 1.5rem;
}

#loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #2e7d32;
  font-size: 1.2rem;
  z-index: 1000;
}

@media (max-width: 576px) {
  .calculator-card { padding: 15px; }
  .header h1 { font-size: 1.5rem; }
  .row > div { margin-bottom: 0.5rem; }
}