body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f8f9fa;
    line-height: 1.6;
}

h1 {
    color: #678998;
    text-align: center;
    margin-bottom: 30px;
}

span {
    color: #ff9505;
}

.calculator {
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.course-input {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
    align-items: center;
}

.course-input input, 
.course-input select {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    flex: 1;
    min-width: 120px;
}

.course-name {
    min-width: 200px;
}

.course-credits {
    max-width: 80px;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.add-btn {
    background-color: #2ecc71;
    color: white;
}

.add-btn:hover {
    background-color: #27ae60;
}

.calculate-btn {
    background-color: #3498db;
    color: white;
}

.calculate-btn:hover {
    background-color: #2980b9;
}

.remove-btn {
    background-color: #e74c3c;
    color: white;
    /*padding: 10px 15px;*/
}

.remove-btn:hover {
    background-color: #c0392b;
}

.src-btn {
    background-color: #af7ac5;
    color: white;
}

.src-btn:hover {
    background-color: #8e44ad;
}

#courses-container {
    margin-bottom: 20px;
}

#result {
    margin-top: 25px;
    font-weight: bold;
    font-size: 20px;
    text-align: center;
    padding: 15px;
    background-color: #e8f4fc;
    border-radius: 5px;
    display: none;
    color: #2c3e50;
}

.error {
    border-color: #e74c3c !important;
}

@media (max-width: 600px) {
    .course-input {
        flex-direction: column;
        align-items: stretch;
    }
    
    .course-input input, 
    .course-input select {
        width: 100%;
        min-width: auto;
    }
    
    .button-group {
        flex-direction: column;
    }
}

#source-code pre {
  background-color: #f4f4f4;
  padding: 15px;
  border-radius: 5px;
  overflow-x: auto;
  max-height: 400px;
  white-space: pre-wrap;
  margin-bottom: 20px;
  font-family: monospace;
}