body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f9f9f9;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.controls {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.word-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.word-item {
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.word-item:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

.word-item.highlight {
    background-color: #ffeb3b;
    border-color: #ffc107;
}

.word-item.selected {
    border-color: #28a745;
    border-width: 2px;
    box-shadow: 0 0 8px rgba(40, 167, 69, 0.3);
}

.word-item.selected::after {
    content: "起点";
    position: absolute;
    top: -5px;
    right: 5px;
    background: #28a745;
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 3px;
}

button {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    background-color: #0078d4;
    color: white;
    cursor: pointer;
}

button:hover {
    background-color: #005a9e;
}

button.stop {
    background-color: #d83b01;
}

input[type="number"] {
    width: 50px;
    padding: 4px;
    border: 1px solid #ccc;
    border-radius: 4px;
}