* {
    box-sizing: border-box;
}
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: #f5f5f5;
}
h1 {
    text-align: center;
}
.tip {
    text-align: center;
    margin-bottom: 20px;
    color: #555;
}
.container {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.panel {
    flex: 1;
    min-width: 320px;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 10px;
}
th, td {
    border: 1px solid #ddd;
    padding: 6px;
    text-align: center;
}
th {
    background: #f0f0f0;
}
td[contenteditable] {
    background: #fffbe6;
    min-width: 40px;
    outline: none;
}
td[contenteditable]:focus {
    background: #fff8d1;
}
button {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: #007bff;
    color: #fff;
    font-size: 16px;
}
button:hover {
    opacity: 0.9;
}
.results table {
    margin-top: 10px;
}
.results th {
    background: #007bff;
    color: #fff;
}