body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f8ff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.custom-navbar {
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
}

#quiz-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #ffffff;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    padding: 20px; 
}

.btn-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.btn-answer {
    padding: 15px;
    font-size: 1.1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.btn-answer:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.hide {
    display: none;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

#start-btn, #next-btn {
    font-size: 1.2rem;
    font-weight: bold;
    padding: 12px 30px;
    border-radius: 25px;
}

#feedback {
    font-size: 1.1rem;
    font-weight: bold;
}

#score-container {
    font-size: 1.2rem;
    color: #007bff; 
}

.correct {
    background-color: #28a745; 
    color: white; 
}

.wrong {
    background-color: #dc3545; 
    color: white; 
}

.alert-success {
   background-color:#d4edda; 
   border-color:#c3e6cb; 
   color:#155724; 
}

.alert-danger {
   background-color:#f8d7da; 
   border-color:#f5c6cb; 
   color:#721c24;
}

footer {
   margin-top:auto; 
}