.apkmpb-box {
    max-width: 800px;
    margin: 30px auto;
    background: #ffffff;
    border: 1px solid #dbeafe;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.12);
    font-family: Arial, sans-serif;
}

.apkmpb-topbar {
    background: #2563EB;
    padding: 14px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.apkmpb-copy,
.apkmpb-video {
    box-sizing: border-box;
    min-height: 40px;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 20px;
    font-weight: 700;
    white-space: nowrap;
}

.apkmpb-copy {
    background: #ffffff;
    color: #2563EB;
    border: 0;
    cursor: pointer;
    font-family: Arial, sans-serif;
}

.apkmpb-copy:hover,
.apkmpb-video:hover {
    opacity: 0.92;
}

.apkmpb-copy:focus-visible,
.apkmpb-video:focus-visible {
    outline: 3px solid rgba(255,255,255,0.75);
    outline-offset: 2px;
}

.apkmpb-video {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    color: #2563EB;
    text-decoration: none;
}

.apkmpb-prompt {
    padding: 24px;
    background: #ffffff;
    color: #222222;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;
    font-size: 11px;
    line-height: 1.8;
    white-space: pre-wrap;
    word-break: break-word;
    overflow-wrap: anywhere;
    user-select: text;
    -webkit-user-select: text;
}

@media (max-width: 520px) {
    .apkmpb-topbar {
        padding: 12px;
    }

    .apkmpb-copy,
    .apkmpb-video {
        padding: 9px 12px;
        font-size: 13px;
    }

    .apkmpb-prompt {
        padding: 18px;
        font-size: 11px;
    }
}