body {
    font-family: Arial;
    background: #f5f6f8;
}

.lfu-container {
    max-width: 700px;
    margin: 50px auto;
    background: white;
    padding: 25px;
    border-radius: 10px;
}

.tabs {
    display: flex;
    margin-bottom: 20px;
}

.tab {
    flex: 1;
    text-align: center;
    padding: 10px;
    color: #aaa;
    border-bottom: 2px solid #eee;
}

.tab.active {
    color: #c9a646;
    border-color: #c9a646;
}

.section { display: none; }
.section.active { display: block; }

input {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
}

button {
    padding: 10px;
    margin-top: 10px;
}