body {
    font-family: Arial, sans-serif;
    max-width: 750px;
    margin: 0 auto;
    padding: 20px;
    background: #f8f9fc;
    line-height: 1.6;
    color: #333;
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 10px;
}

.progress-container {
    height: 12px;
    background: #e0e0e0;
    border-radius: 6px;
    margin: 25px 0;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2980b9);
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 6px;
}

.progress-text {
    text-align: center;
    font-size: 15px;
    color: #555;
    margin-bottom: 25px;
    font-weight: 500;
}

.question {
    background: #fff;
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin: 25px 0;
    border: 1px solid #eee;
}

.question h2 {
    margin-top: 0;
    color: #2c3e50;
    font-size: 1.35rem;
}

button {
    display: block;
    width: 100%;
    padding: 16px 20px;
    margin: 12px 0;
    font-size: 17px;
    border: 2px solid #3498db;
    background: #fff;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

button:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

#final-screen, #result {
    background: #fff;
    padding: 45px 30px;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    text-align: center;
    margin-top: 30px;
    display: none;
}

.btn-show {
    background: #27ae60;
    color: white;
    font-size: 18px;
    padding: 16px 40px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    margin: 15px 8px;
    transition: all 0.3s;
}

.btn-show:hover {
    background: #219653;
    transform: translateY(-3px);
}