:root{
    --azul-oscuro: #0f172a;
    --azul-medio: #1e3a8a;
    --azul-brillante: #2563eb;
    --celeste: #38bdf8;
    --verde: #16a34a;
    --verde-oscuro: #166534;
    --dorado: #f59e0b;
    --naranja: #d97706;
    --rojo: #dc2626;
    --blanco: #ffffff;
    --gris-fondo: #eef4fb;
    --gris-borde: #dbe4f0;
    --texto: #0f172a;
    --texto-suave: #64748b;
    --sombra: 0 12px 30px rgba(15, 23, 42, 0.12);
    --radio: 18px;
}

*{
    box-sizing: border-box;
}

body{
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--texto);
    background:
        radial-gradient(circle at top left, rgba(37,99,235,.18), transparent 26%),
        radial-gradient(circle at top right, rgba(245,158,11,.16), transparent 26%),
        linear-gradient(180deg, #f8fbff 0%, #edf4fb 100%);
}

/* NAVBAR */
.navbar-bank{
    background: linear-gradient(90deg, #111827, #1f2937);
    box-shadow: 0 8px 24px rgba(0,0,0,.18);
    padding: 14px 0;
}

.navbar-bank .navbar-brand{
    color: #fff !important;
    font-weight: 800;
    font-size: 1.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: .3px;
}

.bank-logo{
    font-size: 1.5rem;
}

.nav-link{
    color: rgba(255,255,255,.85) !important;
    font-weight: 600;
    border-radius: 10px;
    padding: 8px 14px !important;
    transition: all .2s ease;
}

.nav-link:hover{
    color: #fff !important;
    background: rgba(255,255,255,.10);
    transform: translateY(-1px);
}

.user-welcome{
    color: #fff;
    font-weight: 600;
    margin-right: 12px;
}

.btn-logout{
    border-radius: 12px;
    font-weight: 700;
    padding: 8px 15px;
}

/* CONTENIDO */
.page-shell{
    padding: 34px 0 10px;
}

.page-title{
    font-size: 2.4rem;
    font-weight: 800;
    color: #10203a;
    margin-bottom: 24px;
    letter-spacing: .2px;
}

/* DASHBOARD GRID */
.kpi-grid{
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    margin-bottom: 28px;
}

@media (max-width: 992px){
    .kpi-grid{
        grid-template-columns: 1fr;
    }
}

/* TARJETAS */
.card{
    border: none;
    border-radius: var(--radio);
    overflow: hidden;
    box-shadow: var(--sombra);
    background: var(--blanco);
}

.dashboard-card{
    min-height: 240px;
    transition: transform .2s ease, box-shadow .2s ease;
}

.dashboard-card:hover{
    transform: translateY(-6px);
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.16);
}

.dashboard-panel .card-header{
    border: none;
    padding: 16px 20px;
    font-weight: 800;
    font-size: 1.05rem;
}

.dashboard-panel .card-body{
    padding: 24px 20px;
}

.card-primary{
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: #fff;
}

.card-success{
    background: linear-gradient(135deg, #22c55e, #15803d);
    color: #fff;
}

.card-warning{
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #fff;
}

.card-primary .card-header{
    background: rgba(0,0,0,.10);
    color: #fff;
}

.card-success .card-header{
    background: rgba(0,0,0,.10);
    color: #fff;
}

.card-warning .card-header{
    background: rgba(0,0,0,.10);
    color: #fff;
}

.card-label{
    font-size: 1.1rem;
    font-weight: 700;
    opacity: .95;
}

.card-value{
    font-size: 2.3rem;
    font-weight: 900;
    margin: 10px 0 16px;
}

.card-soft{
    background: #fff;
    border-radius: var(--radio);
    box-shadow: var(--sombra);
}

/* BOTONES */
.btn{
    border: none;
    border-radius: 12px;
    font-weight: 700;
    padding: 10px 18px;
    transition: .2s ease;
}

.btn:hover{
    transform: translateY(-1px);
}

.btn-light{
    background: rgba(255,255,255,.96);
    color: #0f172a !important;
    border: 1px solid rgba(255,255,255,.35);
}

.btn-light:hover{
    background: #fff;
    color: #1d4ed8 !important;
}

.btn-primary{
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.btn-success{
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.btn-warning{
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #fff;
}

.btn-danger{
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.btn-secondary{
    background: linear-gradient(135deg, #94a3b8, #64748b);
    color: #fff;
}

.btn-info{
    background: linear-gradient(135deg, #38bdf8, #0284c7);
    color: #fff;
}

.quick-action{
    display: block;
    width: 100%;
    background: rgba(255,255,255,.95);
    color: #0f172a !important;
    text-decoration: none;
    text-align: center;
    padding: 14px 16px;
    border-radius: 14px;
    font-weight: 800;
    border: 1px solid rgba(255,255,255,.40);
    box-shadow: inset 0 1px 0 rgba(255,255,255,.6);
    transition: .2s ease;
}

.quick-action:hover{
    background: #fff;
    color: #1d4ed8 !important;
    transform: translateY(-2px);
}

.operations-grid{
    display: grid;
    gap: 12px;
    margin-top: 6px;
}

/* FORMULARIOS */
.form-label{
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 8px;
}

.form-control,
.form-select,
textarea,
select,
input{
    border-radius: 14px !important;
    border: 1px solid #d6e0eb !important;
    background: #fff !important;
    min-height: 50px;
    padding: 12px 14px !important;
    box-shadow: none !important;
}

textarea{
    min-height: 120px !important;
}

.form-control:focus,
.form-select:focus,
textarea:focus,
input:focus,
select:focus{
    border-color: #60a5fa !important;
    box-shadow: 0 0 0 4px rgba(37,99,235,.12) !important;
}

/* TABLAS */
.table-wrap{
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--sombra);
    overflow: hidden;
}

.table{
    margin-bottom: 0;
}

.table thead th{
    background: linear-gradient(90deg, #0f172a, #1e293b);
    color: #fff;
    border: none;
    padding: 16px 14px;
    font-weight: 700;
}

.table tbody td{
    padding: 14px;
    vertical-align: middle;
    border-color: #eef2f7;
}

.table-striped>tbody>tr:nth-of-type(odd)>*{
    background-color: #f8fbff;
}

/* ALERTAS */
.alert{
    border: none;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0,0,0,.06);
    padding: 15px 18px;
}

.alert-success{
    background: #eaf8ef;
    color: #166534;
}

.alert-danger{
    background: #feecec;
    color: #991b1b;
}

.alert-warning{
    background: #fff7dd;
    color: #92400e;
}

.alert-info{
    background: #eaf4ff;
    color: #1d4ed8;
}

/* BADGES */
.badge{
    padding: 8px 10px;
    border-radius: 12px;
    font-weight: 800;
}

/* PAGE ACTIONS */
.page-actions{
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 12px;
}

/* FOOTER */
.footer-bank{
    margin-top: 42px;
    background: linear-gradient(90deg, #111827, #1f2937);
    color: #fff;
    padding: 24px 0;
    box-shadow: 0 -8px 20px rgba(0,0,0,.08);
}

.footer-bank .small-line{
    opacity: .88;
    margin-top: 6px;
}

/* LOGIN / REGISTRO */
.auth-wrap{
    min-height: calc(100vh - 220px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card{
    max-width: 520px;
    width: 100%;
}

.auth-card-wide{
    max-width: 900px;
    width: 100%;
}

.auth-hero{
    background: linear-gradient(135deg, rgba(37,99,235,.15), rgba(245,158,11,.12));
    border-radius: 24px;
    padding: 24px;
    box-shadow: var(--sombra);
}

.auth-title{
    font-size: 2rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 10px;
}

/* RESPONSIVE */
@media (max-width: 768px){
    .page-title{
        font-size: 1.9rem;
    }

    .card-value{
        font-size: 1.9rem;
    }

    .user-welcome{
        margin-top: 8px;
        margin-bottom: 8px;
        display: block;
    }
}