:root {
    --primary: #2f6bff;
    --primary-dark: #1e48c8;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #f59e0b;
    --ink: #172033;
    --muted: #64748b;
    --surface: #ffffff;
    --surface-soft: #f6f8fc;
    --border: #e5eaf2;
    --sidebar: #101827;
    --sidebar-soft: rgba(255, 255, 255, .08);
}

body {
    min-height: 100vh;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: radial-gradient(circle at top left, #eef4ff 0, #f8fafc 36%, #f6f8fc 100%);
    color: var(--ink);
}

.card {
    border-radius: 1rem;
    border: 1px solid rgba(226, 232, 240, .75) !important;
    box-shadow: 0 14px 40px rgba(15, 23, 42, .06) !important;
}

.card-header {
    border-top-left-radius: 1rem !important;
    border-top-right-radius: 1rem !important;
}

.btn {
    border-radius: .75rem;
    font-weight: 650;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: 0;
    box-shadow: 0 10px 20px rgba(47, 107, 255, .22);
}

.btn-primary:hover { filter: brightness(.96); }

.form-control,
.form-select {
    border-radius: .8rem;
    border-color: var(--border);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 .2rem rgba(47, 107, 255, .14);
}

.badge { border-radius: 999px; font-weight: 650; }
code { background: #eef2ff; color: #29337a; padding: .2rem .45rem; border-radius: .5rem; }
.table th { color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .04em; }
.alert { border: 0; border-radius: 1rem; }

.sidebar-desktop {
    width: 280px;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    background: linear-gradient(180deg, #101827 0%, #162033 100%);
    z-index: 1030;
    display: none;
}

@media (min-width: 992px) {
    .sidebar-desktop { display: flex; }
    .main-content { margin-left: 280px; padding: 2rem; }
}

.sidebar-wrap { height: 100vh; display: flex; flex-direction: column; width: 100%; }
.sidebar-header { padding: 1.2rem 1rem .85rem; }
.sidebar-content { flex: 1 1 auto; overflow-y: auto; padding: 0 .65rem .75rem; }
.sidebar-footer { flex: 0 0 auto; padding: .85rem 1rem 1.1rem; border-top: 1px solid rgba(255, 255, 255, .12); }

.brand { color: #fff; text-decoration: none; display: flex; align-items: center; gap: .6rem; }
.brand:hover { color: #fff; }

.nav-link {
    color: rgba(255, 255, 255, .76);
    padding: .65rem .78rem;
    border-radius: .85rem;
    margin-bottom: .12rem;
}
.nav-link:hover { color: #fff; background: var(--sidebar-soft); }
.nav-link.active { color: #fff; background: rgba(47, 107, 255, .32); }
.nav-link i { width: 22px; }
.nav-link.py-1 { padding-top: .38rem !important; padding-bottom: .38rem !important; }

.accordion {
    --bs-accordion-bg: transparent;
    --bs-accordion-border-color: transparent;
    --bs-accordion-btn-color: rgba(255, 255, 255, .82);
    --bs-accordion-btn-bg: transparent;
    --bs-accordion-active-bg: rgba(47, 107, 255, .22);
    --bs-accordion-active-color: #fff;
    --bs-accordion-btn-focus-box-shadow: none;
}
.accordion-button { padding: .65rem .78rem; border-radius: .85rem !important; }
.accordion-button::after { filter: invert(1); }
.accordion-body { padding: .28rem .25rem .55rem; }

.sub-link {
    display: block;
    padding: .48rem .78rem;
    margin-left: .75rem;
    border-radius: .75rem;
    color: rgba(255, 255, 255, .70);
    text-decoration: none;
}
.sub-link:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.sub-link.active { color: #fff; background: rgba(255, 255, 255, .14); }

.main-content { min-height: 100vh; padding: 1rem; }
.topbar { position: sticky; top: 0; z-index: 1020; background: rgba(255, 255, 255, .92); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(0, 0, 0, .08); }
@media (min-width: 992px) { .topbar { display: none; } }

.group-context {
    border: 1px solid var(--border);
    background: linear-gradient(135deg, #fff, #eef4ff);
    border-radius: 1rem;
    padding: 1rem;
}

.empty-state {
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--muted);
}