#nubzio-mb-root{font-family:system-ui,-apple-system,sans-serif;color:#182341}#nubzio-mb-root *{box-sizing:border-box}#nubzio-mb-fab{position:fixed;right:21px;bottom:22px;z-index:2147483000;border:0;border-radius:100px;background:#674bda;color:white;box-shadow:0 9px 26px #4532a454;padding:10px 15px;display:flex;align-items:center;gap:9px;font-weight:800;font-size:13px;cursor:pointer}#nubzio-mb-fab .mb-symbol{font-size:22px}#nubzio-mb-panel{display:none;position:fixed;right:20px;bottom:86px;width:min(390px,calc(100vw - 24px));height:min(580px,calc(100dvh - 108px));z-index:2147483001;background:white;border:1px solid #e7e3fa;border-radius:22px;box-shadow:0 20px 60px #19204938;overflow:hidden;flex-direction:column}#nubzio-mb-panel.mb-open{display:flex}#nubzio-mb-head{background:linear-gradient(120deg,#4d36b8,#8162eb);color:white;padding:17px;display:flex;justify-content:space-between;align-items:center}#nubzio-mb-head strong{font-size:19px}#nubzio-mb-head small{display:block;font-size:11px;opacity:.85;margin-top:3px}#nubzio-mb-close{color:white;border:0;background:#ffffff29;font-size:23px;border-radius:9px;width:32px;height:32px;cursor:pointer}#nubzio-mb-chat{flex:1;overflow:auto;padding:16px;background:#fcfbff}#nubzio-mb-chat .mb-bubble{padding:12px 14px;border-radius:15px;margin-bottom:12px;max-width:92%;font-size:13px;line-height:1.5;white-space:pre-wrap;overflow-wrap:anywhere}#nubzio-mb-chat .mb-ai{background:#f0ecff;color:#30276c}#nubzio-mb-chat .mb-user{background:#e9f7fb;color:#19435d;margin-left:auto}#nubzio-mb-actions{display:flex;gap:6px;padding:10px 12px;flex-wrap:wrap}#nubzio-mb-actions button{border:1px solid #e4dffa;background:#f7f5ff;color:#5742bd;border-radius:9px;padding:8px;font-size:11px;font-weight:700;cursor:pointer}#nubzio-mb-upload{padding:0 13px 8px;font-size:12px;color:#6251b3}#nubzio-mb-upload label{cursor:pointer;display:inline-block;padding:8px;border:1px dashed #9d8aef;border-radius:9px}#nubzio-mb-upload input{display:none}#nubzio-mb-preview{display:none;align-items:center;gap:9px;margin-top:8px}#nubzio-mb-preview img{width:55px;height:46px;object-fit:cover;border-radius:7px}#nubzio-mb-preview button{border:0;background:#f1edff;padding:6px;border-radius:7px;cursor:pointer}#nubzio-mb-compose{display:flex;gap:7px;padding:10px 12px;border-top:1px solid #eceaf5}#nubzio-mb-text{flex:1;min-width:0;padding:11px;border:1px solid #e1def0;border-radius:10px;font:inherit;font-size:13px}#nubzio-mb-send{background:#654bd4;color:white;border:0;border-radius:10px;padding:0 13px;font-weight:800;cursor:pointer}#nubzio-mb-status{font-size:10px;padding:0 12px 8px;color:#747d95}@media(max-width:650px){#nubzio-mb-fab{right:14px;bottom:15px;width:54px;height:54px;padding:0;justify-content:center}#nubzio-mb-fab .mb-label{display:none}#nubzio-mb-panel{right:8px;bottom:78px;width:calc(100vw - 16px);height:min(580px,calc(100dvh - 90px))}}
/* Homepage: independent tutor, not connected to any game question. */
.mb-home-mode #nubzio-mb-fab{box-shadow:0 8px 25px rgba(76,56,175,.22)}

/* V286: dedicated full-page independent tutor */
.mb-dedicated-mode #nubzio-mb-fab{display:none!important}
.mb-dedicated-mode #nubzio-mb-panel{display:flex!important;position:relative;inset:auto;width:100%;height:min(740px,calc(100dvh - 180px));min-height:480px;border-radius:24px;box-shadow:0 16px 48px rgba(31,26,79,.11)}
.mb-dedicated-mode #nubzio-mb-chat{flex:1;min-height:0}
.mb-dedicated-mode #nubzio-mb-close{display:none}
@media(max-width:650px){.mb-dedicated-mode #nubzio-mb-panel{width:100%;height:calc(100dvh - 120px);min-height:420px;border-radius:16px}}

/* V298: keep the chat scroller below the fixed-height header on every viewport. */
#nubzio-mb-panel{min-height:0;isolation:isolate}
#nubzio-mb-head{flex:0 0 auto;position:relative;z-index:1}
#nubzio-mb-chat{min-height:0;overscroll-behavior:contain;scroll-padding-top:12px}
#nubzio-mb-actions,#nubzio-mb-upload,#nubzio-mb-compose,#nubzio-mb-status{flex-shrink:0}