#aihelper-box {
    margin: 1em 0;
    padding: 1em;
    border-radius: 12px;
    background: #f9f9f9;
    border: 2px solid #4285f4;
    box-shadow: 0 3px 8px rgba(0,0,0,0.15);
    font-size: 14px;
    position: relative;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

#aihelper-box.collapsed {
    max-height: 1.5em;
    padding: 0.5em 1em;
}

#aihelper-box .aihelper-header {
    font-weight: bold;
    margin-bottom: 0.5em;
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-right: 20px;
}

#aihelper-box .aihelper-header::after {
    content: "▾";
    position: absolute;
    right: 0;
    top: 0;
    transition: transform 0.3s ease;
}

#aihelper-box.collapsed .aihelper-header::after {
    transform: rotate(-90deg);
}

#aihelper-box .loader {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #4285f4;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    margin-bottom: 0.5em;
    display: none;
}

#aihelper-box .aihelper-answer {
    transition: opacity 0.3s ease;
    opacity: 1;
}

#aihelper-box.collapsed .aihelper-answer {
    opacity: 0;
    height: 0;
}

@keyframes spin {
    0% { transform: rotate(0deg);}
    100% { transform: rotate(360deg);}
}