/* ===========================
   Roof Shape Guide (Popup)
=========================== */

* {
    box-sizing: border-box;
}

.explanation {
    background: #f8f9fa;
    padding: 12px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    border: 1px solid #e5e5e5;
}

.explanation h6,
.explanation h3 {
    margin-bottom: 6px;
    font-weight: 600;
}

.formula-box {
    background: #ffffff;
    border-left: 4px solid #0d6efd;
    padding: 8px 12px;
    margin: 8px 0;
    border-radius: 4px;
}

.formula-box p {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
}

.shape-img {
    width: 100%;
    max-width: 600px;
    display: block;
    margin: 12px auto 28px auto;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #ffffff;
}
.explanation img {
    max-width: 75%;
    height: auto;
    display: block;
    margin: 20px auto;
}