/* Niu Telecom Enterprise & Wholesale B2B Design System */
:root {
    --b2b-navy: #091322;
    --b2b-sidebar: #0f1c30;
    --b2b-card: #ffffff;
    --b2b-bg: #f3f6fa;
    --b2b-cyan: #00d2d3;
    --b2b-gold: #f39c12;
    --b2b-pink: #ff0066;
    --b2b-pink-dark: #cc0052;
    --b2b-text: #1e293b;
    --b2b-muted: #64748b;
    --b2b-border: #cbd5e1;
    --b2b-green: #10b981;
    --b2b-red: #ef4444;
}

body {
    background-color: var(--b2b-bg);
    font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
    color: var(--b2b-text);
    margin: 0;
    padding: 0;
}

/* Header B2B Enterprise */
.b2b-topbar {
    background-color: var(--b2b-navy);
    color: #ffffff;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    box-shadow: 0 2px 12px rgba(0,0,0,0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.b2b-brand {
    font-size: 1.3rem;
    font-weight: 800;
    color: #ffffff;
    text-decoration: none;
}
.b2b-brand .pink { color: var(--b2b-pink); }
.b2b-brand .badge-b2b {
    background: linear-gradient(135deg, #00d2d3, #0284c7);
    font-size: 0.68rem;
    padding: 3px 9px;
    border-radius: 6px;
    color: #fff;
    margin-left: 8px;
    text-transform: uppercase;
    vertical-align: middle;
    font-weight: 700;
}

/* Sidebar B2B */
.b2b-sidebar {
    background-color: var(--b2b-sidebar);
    min-height: calc(100vh - 60px);
    padding: 1rem 0;
}

.b2b-nav-link {
    color: #94a3b8;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    border-left: 4px solid transparent;
    transition: all 0.2s;
}
.b2b-nav-link i { font-size: 1.15rem; width: 28px; }
.b2b-nav-link:hover {
    color: #ffffff;
    background-color: rgba(255,255,255,0.04);
}
.b2b-nav-link.active {
    color: #ffffff;
    background-color: rgba(0, 210, 211, 0.12);
    border-left-color: var(--b2b-cyan);
}

/* Metric Cards */
.b2b-card {
    background: #ffffff;
    border: 1px solid var(--b2b-border);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.b2b-card-title {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--b2b-muted);
    letter-spacing: 0.5px;
}

.b2b-card-val {
    font-size: 1.8rem;
    font-weight: 800;
    margin-top: 0.3rem;
    color: var(--b2b-navy);
}

/* Badges y Botones */
.b2b-badge {
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-block;
}
.b2b-badge-pyme { background-color: #e0f2fe; color: #0369a1; }
.b2b-badge-empresa { background-color: #fef3c7; color: #b45309; }
.b2b-badge-mayorista { background-color: #fce7f3; color: #be185d; }

.btn-niu {
    background: linear-gradient(135deg, var(--b2b-pink), var(--b2b-pink-dark));
    color: #ffffff;
    border: none;
    font-weight: 700;
    border-radius: 8px;
    padding: 9px 20px;
}
.btn-niu:hover { background: var(--b2b-pink-dark); color: #ffffff; }

.b2b-table {
    width: 100%;
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--b2b-border);
}
.b2b-table th {
    background-color: #f8fafc;
    color: var(--b2b-muted);
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: 14px 16px;
    border-bottom: 1px solid var(--b2b-border);
}
.b2b-table td {
    padding: 14px 16px;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.88rem;
    vertical-align: middle;
}