*{
    box-sizing:border-box;
    font-family:Arial, Helvetica, sans-serif;
}

body{
    background:#f4f6f9;
    margin:0;
    padding:40px 20px;
}

.container{
    max-width:800px;
    margin:auto;
}

.survey-card{
    background:white;
    padding:30px;
    border-radius:12px;
    box-shadow:0 4px 15px rgba(0,0,0,0.1);
}

h1{
    text-align:center;
    margin-bottom:25px;
}

.progress-wrapper{
    width:100%;
    height:12px;
    background:#e5e5e5;
    border-radius:20px;
    overflow:hidden;
    margin-bottom:30px;
}

#progressBar{
    height:100%;
    width:0%;
    background:#009FDA;
    transition:0.3s;
}

.question-title{
    font-size:22px;
    margin-bottom:20px;
}

.option{
    margin-bottom:12px;
}

.option label{
    cursor:pointer;
}

input[type=radio]{
    margin-right:10px;
}

textarea{
    width:100%;
    min-height:120px;
    padding:12px;
    border:1px solid #ccc;
    border-radius:6px;
}

.navigation{
    margin-top:25px;
    display:flex;
    justify-content:space-between;
}

button{
    background:#009FDA;
    color:white;
    border:none;
    padding:12px 25px;
    border-radius:6px;
    cursor:pointer;
}

button:hover{
    opacity:0.9;
}

button:disabled{
    background:#bdbdbd;
    cursor:not-allowed;
}

.result{
    text-align:center;
}

pre{
    text-align:left;
    background:#f5f5f5;
    padding:15px;
    border-radius:6px;
}