/* styles.css */
body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #2c3e50;
    text-align: center;
}

.solver-box {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

input[type="text"] {
    flex: 1;
    padding: 12px;
    border: 2px solid #3498db;
    border-radius: 8px;
    font-size: 16px;
}

button {
    padding: 12px 25px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #2980b9;
}

.solution-box {
    margin-top: 20px;
    padding: 20px;
    border-radius: 8px;
}

.hidden {
    display: none;
}

.explanation {
    padding: 15px;
    margin: 10px 0;
    border-radius: 8px;
}

#studentSolution { background: #e8f4fc; }
#engineerSolution { background: #fce8e8; }
#casualSolution { background: #e8fce9; }

.mode-selector select {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 2px solid #3498db;
    border-radius: 8px;
}