.usage-guide-button {
    color: #FF69B4;
    font-size: 14px;
    padding: 8px 0;
    cursor: pointer;
    text-align: center;
    text-decoration: underline;
    background: none;
    border: none;
    width: 240px;
    margin: 0 auto 24px;
    display: block;
    white-space: nowrap;
}

.dialog {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

.dialog.is-open {
    display: block;
}

.dialog__overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
}

.dialog__content {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
}

.dialog__close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    border: none;
    background: none;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    color: #666;
}

.usage-guide {
    font-size: 14px;
    line-height: 1.6;
    color: #333;
}

.usage-guide p {
    margin-bottom: 12px;
}

.usage-guide p:last-child {
    margin-bottom: 0;
}

.usage-guide .mt-20 {
    margin-top: 20px;
}

.usage-guide .note {
    font-size: 12px;
    color: #666;
}

@media screen and (max-width: 768px) {
    .dialog__content {
        padding: 16px;
    }

    .usage-guide {
        font-size: 13px;
    }

    .usage-guide p:first-child {
        margin-top: 24px;
    }

    .dialog__close {
        top: 8px;
        right: 8px;
    }
}