.app-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100vh;
    background: radial-gradient(circle at top left, rgba(99,102,241,0.20), transparent 25%), radial-gradient(circle at bottom right, rgba(59,130,246,0.18), transparent 25%), linear-gradient(135deg, #0f172a 0%, #111827 100%);
}

.main-shell {
    display: flex;
    flex-direction: column;
    min-width: 0;
    padding: 20px;
    gap: 16px;
}

.content-shell,
#pageHost {
    flex: 1;
    min-height: 0;
    height: 100%;
    border-radius: 28px;
    background: rgba(255,255,255,0.04);
    box-shadow: inset 0 0 0 1px rgba(148,163,184,0.12);
    overflow: hidden;
}

.loading-screen {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.loading-title {
    font-size: 28px;
    font-weight: 800;
    color: #f8fafc;
}

.loading-subtitle {
    margin-top: 10px;
    font-size: 14px;
    color: #94a3b8;
}
.sidebar-version {
    margin-top: 14px;
    padding: 10px 12px;
    border-radius: 12px;
    text-align: center;
    font-size: 12px;
    font-weight: 800;
    color: #86efac;
    background: rgba(22, 101, 52, 0.28);
    border: 1px solid rgba(34, 197, 94, 0.35);
}
.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: nowrap;
}

.info-pill {
    padding: 10px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    color: #bfdbfe;
    background: rgba(37, 99, 235, 0.25);
    white-space: nowrap;
}