body{
    font-family:Arial,sans-serif;
    background:#f5f7fa;
    margin:20px;
}

h1{
    text-align:center;
}

.container{
    display:flex;
    gap:20px;
}

.controls{
    width:350px;
    background:white;
    padding:20px;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,.1);
}

.visual{
    flex:1;
}

label{
    display:block;
    margin-top:8px;
}

input,select{
    width:100%;
    padding:6px;
    box-sizing:border-box;
}

button{
    margin-top:15px;
    padding:10px 15px;
    cursor:pointer;
    font-size:16px;
}

svg{
    width:100%;
    height:500px;
    background:white;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,.1);
}

.neuron{
    fill:white;
    stroke:#333;
    stroke-width:3;
}

.connection{
    stroke:black;
    stroke-width:2;
}

.weightLabel{
    font-size:14px;
    font-weight:bold;
}

.biasLabel{
    font-size:14px;
    fill:#0055cc;
    font-weight:bold;
}

.resultPanel{
    margin-top:20px;
    background:white;
    padding:20px;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,.1);
}

.correct{
    color:green;
    font-weight:bold;
}

.incorrect{
    color:red;
    font-weight:bold;
}

.solution{
    margin-top:15px;
    padding:10px;
    background:#eef4ff;
    border-radius:5px;
    display:none;
    font-family:monospace;
}

.answerSection{
    margin-top:20px;
    padding:15px;
    background:#f7f7f7;
    border-radius:5px;
}