.mitsu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
    margin: 30px 0;
}

.mitsu-lamp {
    text-align: center;
    position: relative;
}

.mitsu-lamp input {
    display: none;
}

.mitsu-lamp label {
    font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", Osaka, "メイリオ", Meiryo, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
    font-size: 16px;
    display: block;
    padding: 10px;
    border: 3px solid #ccc;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: bold;
    position: relative;
}

.mitsu-lamp input:checked + label {
    color: #666666;
    border-color: #666666;
}

.mitsu-lamp input:checked + label img {
    height: 20px;
    background: #ff0000;
}

/* NHÁY ĐỒNG BỘ HOÀN HẢO – CLASS CHUNG */
.blink-all {
    animation: blink-sync 1s infinite !important;
}

@keyframes blink-sync {
    0%, 100% {
        color: #666666;
        border-color: #666666;
    }

    50% {
        color: #ff0000;
        border-color: #ff0000;
    }

}

.mitsu-btn {
    text-align: center;
    margin: 35px 0;
}

.mitsu-btn button {
    width: 100%;
    color: #fff;
    font-size: 170%;
}

.mitsu-btn button:hover {
}