/* ===== ปุ่มคู่มือ ===== */
.manual-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ffffff;
    border-radius: 8px;
    padding: 6px 8px;
    font-size: 13px;
    color: #8e54c0;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 5;
}

.manual-btn:hover {
    background: #8e54c0;
    color: #fff;
}

/* ===== MODAL ===== */
.pdf-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
}

.pdf-modal-content {
    position: relative;
    width: 95%;
    max-width: 1200px;
    height: 90%;
    margin: 40px auto;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
}

/* ปุ่มปิด */
.pdf-close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 28px;
    cursor: pointer;
    z-index: 10;
}

/* iframe */
.pdf-modal iframe {
    width: 100%;
    height: 100%;
    border: none;
}