:root {
    --azul: #1e293b;
    --azul-claro: #334155;
    --acento: #2563eb;
}

body {
    background: #f1f5f9;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

.sidebar {
    width: 230px;
    min-height: 100vh;
    background: var(--azul);
    color: #fff;
    position: sticky;
    top: 0;
}

.sidebar-brand {
    font-size: 1.2rem;
    font-weight: 700;
    padding: 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}

.sidebar .nav-link {
    color: #cbd5e1;
    padding: 10px 18px;
    font-size: .92rem;
    border-left: 3px solid transparent;
}

.sidebar .nav-link:hover {
    background: var(--azul-claro);
    color: #fff;
}

.sidebar .nav-link.active {
    background: var(--azul-claro);
    color: #fff;
    border-left: 3px solid var(--acento);
    font-weight: 600;
}

.content {
    flex: 1;
    min-width: 0;
}

.topbar {
    background: #fff;
    padding: 14px 24px;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 10;
}

.page-body {
    padding: 24px;
}

.kpi-card {
    background: #fff;
    border-radius: 12px;
    padding: 18px 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
    border: 1px solid #e2e8f0;
    height: 100%;
}

.kpi-card .kpi-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--azul);
}

.kpi-card .kpi-label {
    color: #64748b;
    font-size: .82rem;
    text-transform: uppercase;
    letter-spacing: .03em;
}

.card-panel {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    border: 1px solid #e2e8f0;
}

.table thead th {
    font-size: .78rem;
    text-transform: uppercase;
    color: #64748b;
    border-bottom: 2px solid #e2e8f0;
}

.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e293b, #2563eb);
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 40px rgba(0,0,0,.2);
}