.preview-expanded {
    position: fixed;
    inset: 0;
    z-index: 1000;
    box-sizing: border-box;
    width: 100%;
    max-width: none;
    height: 100vh;
    height: 100dvh;
    margin: 0 !important;
    padding: 16px;
    overflow: auto;
    background: #fff;
    border-radius: 0;
}
.preview-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.preview-heading > :first-child { min-width: 0; overflow-wrap: anywhere; }
.preview-expanded .preview-heading { position: sticky; top: -16px; z-index: 2; background: #fff; padding: 8px 0; }
.preview-status-mirror { display: none; }
.preview-expanded .preview-status-mirror:not(.hidden) { display: block; }
.preview-fullscreen-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    color: #4b5563;
    background: #fff;
    border: 1px solid #d1d5db;
    border-radius: 4px;
}
.preview-fullscreen-button:hover { background: #f3f4f6; }
.preview-fullscreen-button:focus-visible { outline: 2px solid #2563eb; outline-offset: 2px; }
.preview-fullscreen-button svg { width: 22px; height: 22px; }
.preview-fullscreen-button[aria-pressed="false"] .preview-collapse-icon,
.preview-fullscreen-button[aria-pressed="true"] .preview-expand-icon { display: none; }