:root {
    --primary-dark: #0B192C;
    --primary: #1E3E62;
    --gold: #D97706;
    --gold-light: #F59E0B;
    --emerald: #10B981;
    --emerald-dark: #059669;
    --danger: #DC2626;
    --surface: #F8FAFC;
    --card: #FFFFFF;
    --text: #0F172A;
    --muted: #64748B;
    --border: #E2E8F0;
}

* { box-sizing: border-box; }

html, body {
    margin: 0; padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--surface);
    color: var(--text);
}

.loading-screen {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    height: 100vh; gap: 24px;
    background: var(--primary-dark);
}
.loading-logo {
    font-size: 42px; font-weight: 800; color: #fff;
    letter-spacing: -1px;
}
.loading-logo span { color: var(--gold); }
.loading-spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255,255,255,.15);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Tarjetas KPI */
.kpi-card {
    background: var(--card);
    border-radius: 16px;
    padding: 22px;
    box-shadow: 0 1px 3px rgba(0,0,0,.05);
    border: 1px solid var(--border);
}
.kpi-label {
    font-size: 12px; font-weight: 500;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: 6px;
}
.kpi-value {
    font-size: 26px; font-weight: 800;
    color: var(--primary-dark);
    line-height: 1.1;
}
.kpi-value.gold    { color: var(--gold); }
.kpi-value.emerald { color: var(--emerald); }
.kpi-value.danger  { color: var(--danger); }

/* Badges de estado */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .3px;
}
.badge-activo    { background: #DBEAFE; color: #1E40AF; }
.badge-atraso    { background: #FEE2E2; color: #991B1B; }
.badge-saldado   { background: #D1FAE5; color: #065F46; }
.badge-anulado   { background: #E5E7EB; color: #4B5563; }
.badge-pendiente { background: #FEF3C7; color: #92400E; }
.badge-parcial   { background: #FEF3C7; color: #92400E; }
.badge-pagada    { background: #D1FAE5; color: #065F46; }
.badge-vencida   { background: #FEE2E2; color: #991B1B; }

/* Tablas */
.data-table {
    width: 100%;
    background: var(--card);
    border-radius: 12px;
    overflow: hidden;
    border-collapse: collapse;
    box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.data-table thead {
    background: var(--primary-dark);
    color: #fff;
}
.data-table th {
    padding: 14px 16px;
    text-align: left;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
}
.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    color: var(--text);
}
.data-table tbody tr:hover { background: #F8FAFC; cursor: pointer; }
.data-table tbody tr:last-child td { border-bottom: none; }

/* Botones */
.btn {
    padding: 10px 18px;
    border-radius: 10px;
    border: none;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all .15s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-primary   { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-gold      { background: var(--gold); color: #fff; }
.btn-gold:hover { background: #B45309; }
.btn-emerald   { background: var(--emerald); color: #fff; }
.btn-emerald:hover { background: var(--emerald-dark); }
.btn-danger    { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #B91C1C; }
.btn-ghost     { background: transparent; color: var(--primary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--surface); }
.btn-sm        { padding: 6px 12px; font-size: 12px; }

/* Formularios */
.form-input {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 13px;
    width: 100%;
    background: #fff;
    color: var(--text);
}
.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30,62,98,.1);
}

/* Layout */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.page-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--primary-dark);
    margin: 0;
}
.page-subtitle {
    font-size: 13px;
    color: var(--muted);
    margin-top: 4px;
}

/* Utilidades generales y Login */
.card {
    background: var(--card);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border);
    box-shadow: 0 4px 16px rgba(0, 0, 0, .06);
}
.brand-badge {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--gold-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
}
.sub {
    font-size: 13px;
    color: var(--muted);
}
.form-row {
    margin-bottom: 16px;
}
.form-row label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.form-row input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 13px;
}