body { background: #f5f7fb; }
.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 240px; min-height: 100vh; }
.content-area { flex: 1; }
.sidebar .nav-link { border-radius: 8px; padding: 10px 12px; }
.sidebar .nav-link:hover { background: rgba(255,255,255,0.12); }
.invoice-header { background: linear-gradient(90deg,#0d6efd,#1a57c8); }
.card { border-radius: 14px; }
.table th, .table td { vertical-align: middle; }

.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #eef4ff 0%, #f7f9fd 45%, #e6ecff 100%);
}
.login-card {
    border-radius: 24px;
}
.login-brand-panel {
    border-radius: 28px;
    background: linear-gradient(135deg, #0d6efd 0%, #233c97 55%, #111827 100%);
    box-shadow: 0 20px 60px rgba(13, 110, 253, 0.18);
}
.login-feature-list {
    display: grid;
    gap: 14px;
}
.login-feature-item {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 14px;
    padding: 14px 16px;
}

@media (max-width: 991px) {
    .app-shell { display: block; }
    .sidebar { width: 100%; min-height: auto; }
}