body {
    margin: 0;
    padding: 20px;
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
}
.container {
    max-width: 900px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
h1, h3 {
    margin-top: 0;
    margin-bottom: 10px;
}
.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}
button {
    padding: 10px 15px;
    font-size: 14px;
    border: none;
    border-radius: 4px;
    background-color: #007bff;
    color: white;
    cursor: pointer;
}
button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}
#visualizer {
    width: 100%;
    height: 100px;
    background-color: #222;
    border-radius: 4px;
    margin-bottom: 15px;
    display: block;
}
.status-bar {
    margin-bottom: 15px;
    font-weight: bold;
    font-size: 14px;
    color: #333;
}
.display-container {
    display: flex;
    gap: 20px;
}
.box {
    flex: 1;
}
.text-window {
    width: 100%;
    height: 350px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 10px;
    box-sizing: border-box;
    overflow-y: auto;
    background: #fafafa;
    font-size: 14px;
    resize: none;
}
.phrase-block {
    padding: 6px;
    margin-bottom: 5px;
    border-left: 3px solid #007bff;
    background: #fff;
    outline: none;
    cursor: text;
    transition: background 0.2s;
}
.phrase-block:focus {
    background: #edf4fe;
    border-left-color: #28a745;
}