.sdu-shell{border:1px solid #d7dde5;border-radius:16px;padding:16px;background:#fff}
.sdu-shell__header{margin-bottom:12px}
.sdu-shell__title{font:700 24px/1.2 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#17324d}
.sdu-shell__version{margin-top:4px;font:13px/1.3 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#5f7287}
.sdu-shell__tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.sdu-shell__tab{border:1px solid #b5c3d1;background:#eef4f8;color:#17324d;border-radius:999px;padding:8px 14px;cursor:pointer}
.sdu-shell__tab.is-active{background:#5f9197;color:#fff;border-color:#5f9197}
.sdu-shell__panel{display:none}
.sdu-shell__panel.is-active{display:block}
.sdu-shell__placeholder{border:1px solid #d7dde5;border-radius:14px;padding:16px;background:#fbfdff}
.sdu-shell__placeholder h3{margin:0 0 10px 0}
.sdu-shell__placeholder p{margin:0;color:#5f7287}