.img-slot-fallback {
    height: 50vh;
    border-radius: 12px;
    border: 1px solid #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    position: relative;
    flex-direction: column; /* 🔥 สำคัญ */
    gap: 6px;
}

    /* 🔥 camera icon */
    .img-slot-fallback::before {
        content: "\F220";
        font-family: "bootstrap-icons";
        font-size: 84px;
        color: #6c757d;
        opacity: 0.35;
        line-height: 1;
    }

    /* 🔥 text ใต้ icon */
    .img-slot-fallback::after {
        content: "ถ่ายรูป";
        font-size: 1rem;
        color: #6c757d;
        background-color: rgba(var(--bs-secondary-rgb), .15);
        padding: .1rem .5rem;
        border-radius: var(--bs-border-radius);
        opacity: 0.8;
    }

#meterFileName.has-filename {
    position: absolute;
    bottom: 0;
    left: 50%;
    margin: 0 0 .275rem;
    padding: .1rem .5rem;
    font-size: .875rem;
    color: var(--bs-body-bg);
    background-color: rgba(var(--bs-body-color-rgb), .5);
    border-radius: var(--bs-border-radius);
    pointer-events: none;
    user-select: none;
    transform: translateX(-50%);
    white-space: nowrap;
}