:root { --sidebar-w: 240px; }

/* ---- Auth screen ---- */
.auth-body { background: var(--bs-tertiary-bg); }
.auth-card { width: 100%; max-width: 400px; border-radius: 1rem; }
.auth-logo { font-size: 2.5rem; color: var(--bs-primary); }

/* ---- App shell ---- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: var(--sidebar-w);
    background: var(--bs-body-bg);
    border-right: 1px solid var(--bs-border-color);
    display: flex; flex-direction: column;
    position: fixed; inset: 0 auto 0 0; z-index: 1030;
}
.sidebar-brand {
    display: flex; align-items: center; gap: .5rem;
    font-weight: 600; font-size: 1.05rem;
    padding: 1.1rem 1.25rem; border-bottom: 1px solid var(--bs-border-color);
}
.sidebar-brand i { color: var(--bs-primary); font-size: 1.4rem; }
.sidebar-nav { padding: .75rem; display: flex; flex-direction: column; gap: .15rem; }
.sidebar-nav .nav-link {
    display: flex; align-items: center; gap: .65rem;
    color: var(--bs-body-color); border-radius: .5rem; padding: .55rem .75rem;
}
.sidebar-nav .nav-link:hover { background: var(--bs-tertiary-bg); }
.sidebar-nav .nav-link.active { background: var(--bs-primary); color: #fff; }

.app-main { flex: 1; margin-left: var(--sidebar-w); display: flex; flex-direction: column; }
.topbar {
    display: flex; align-items: center; gap: .5rem;
    padding: .65rem 1.25rem; background: var(--bs-body-bg);
    border-bottom: 1px solid var(--bs-border-color);
    position: sticky; top: 0; z-index: 1020;
}
.content { padding: 1.5rem; }

/* ---- Stat cards ---- */
.stat-icon { font-size: 1.9rem; }
.stat-value { font-size: 1.5rem; font-weight: 700; line-height: 1; }

/* ---- Mobile ---- */
@media (max-width: 767.98px) {
    .sidebar { transform: translateX(-100%); transition: transform .2s ease; }
    .sidebar.open { transform: translateX(0); }
    .app-main { margin-left: 0; }
}