body {
    font-family: Arial, sans-serif;
    background: #4FC3F7;
    margin: 0;
    padding: 0;
}

.hub-container {
    max-width: 1100px;
    margin: 20px auto;
    background: #4FC3F7;
    padding: 16px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.hub-header {
    font-size: 20px;
    font-weight: 700;
    text-align: center;
    background: #81C784;
    padding: 10px;
    border-radius: 8px;
    color: #000;
}

.hub-tabs {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.hub-tab {
    padding: 10px 14px;
    border: none;
    border-radius: 8px;
    background: #FFF176;
    color: #000;
    font-weight: 600;
    cursor: pointer;
}

.hub-tab.active {
    background: #FFE082;
    box-shadow: inset 0 0 0 2px #000;
}

.hub-tab:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.hub-status {
    margin-top: 8px;
    font-weight: 600;
    color: #b45309;
}

.hub-frame {
    margin-top: 12px;
    background: #4FC3F7;
    border-radius: 8px;
    overflow: hidden;
    border: none;
}

.hub-frame iframe {
    width: 100%;
    height: 75vh;
    border: none;
    background: #4FC3F7;
}