:root {
    --primario: #4f46e5;
    --primario-oscuro: #3730a3;
    --acento: #14b8a6;
    --fondo: #f3f4fb;
    --texto: #1f2340;
    --suave: #6b7094;
    --borde: #e3e5f3;
    --ok: #0f9d74;
    --error: #d6336c;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
    background: var(--fondo);
    color: var(--texto);
    line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

/* ---------- Login ---------- */
.fondo-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #312e81 0%, #4f46e5 50%, #14b8a6 100%);
}
.login-caja {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: 20px;
    padding: 36px 30px;
    box-shadow: 0 25px 60px rgba(30, 27, 90, .35);
    text-align: center;
}
.login-logo {
    width: 60px; height: 60px;
    margin: 0 auto 14px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primario), var(--acento));
    color: #fff; font-size: 30px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.login-caja h1 { margin: 0; font-size: 26px; }
.sub { margin: 4px 0 22px; color: var(--suave); }
.login-caja form { text-align: left; }
.login-caja label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 6px; }

/* ---------- Campos y botones ---------- */
input {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--borde);
    border-radius: 10px;
    font: inherit;
    background: #fbfbff;
    color: var(--texto);
}
input:focus {
    outline: none;
    border-color: var(--primario);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, .15);
}
.boton {
    border: 0;
    border-radius: 10px;
    padding: 12px 22px;
    font: inherit;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primario), var(--primario-oscuro));
    transition: transform .1s, box-shadow .2s;
    white-space: nowrap;
}
.boton:hover { box-shadow: 0 6px 16px rgba(79, 70, 229, .35); }
.boton:active { transform: translateY(1px); }
.login-caja .boton { width: 100%; margin-top: 22px; }

.aviso {
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
    margin: 16px 0;
    text-align: left;
}
.aviso-ok { background: #e3f8f1; color: #0b6b4e; border: 1px solid #b6ead9; }
.aviso-error { background: #fde8ef; color: #a1224f; border: 1px solid #f7c4d6; }

/* ---------- Barra superior ---------- */
.barra {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 12px 24px;
    background: linear-gradient(90deg, #312e81, #4f46e5);
    color: #fff;
}
.marca { font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.logo {
    width: 32px; height: 32px; border-radius: 9px;
    background: linear-gradient(135deg, #818cf8, var(--acento));
    display: inline-flex; align-items: center; justify-content: center;
}
.enlaces { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }
.enlaces a { padding: 8px 14px; border-radius: 8px; color: #dfe1ff; font-size: 14px; }
.enlaces a:hover { background: rgba(255, 255, 255, .12); }
.enlaces a.activo { background: rgba(255, 255, 255, .2); color: #fff; font-weight: 600; }
.usuario { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.salir { padding: 7px 14px; border: 1px solid rgba(255, 255, 255, .4); border-radius: 8px; }
.salir:hover { background: rgba(255, 255, 255, .15); }

/* ---------- Contenido ---------- */
.contenido { max-width: 860px; margin: 0 auto; padding: 32px 20px 60px; }
.saludo h1 { margin: 0; font-size: 28px; }
.saludo p { margin: 4px 0 24px; color: var(--suave); }

.tarjetas { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.tarjeta {
    background: #fff;
    border: 1px solid var(--borde);
    border-radius: 16px;
    padding: 26px;
    transition: transform .15s, box-shadow .2s, border-color .2s;
}
.tarjeta:hover {
    transform: translateY(-3px);
    border-color: var(--primario);
    box-shadow: 0 14px 30px rgba(79, 70, 229, .15);
}
.icono {
    width: 46px; height: 46px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; color: #fff; margin-bottom: 14px;
    background: linear-gradient(135deg, var(--primario), var(--acento));
}
.tarjeta h2 { margin: 0 0 6px; font-size: 19px; }
.tarjeta p { margin: 0; color: var(--suave); font-size: 14px; }

.panel {
    background: #fff;
    border: 1px solid var(--borde);
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 8px 24px rgba(31, 35, 64, .05);
}
.panel h1 { margin: 0 0 18px; font-size: 24px; }
.panel h2 { margin: 28px 0 12px; font-size: 18px; }

.fila-busqueda { display: flex; gap: 10px; margin-top: 14px; }
.fila-busqueda input { flex: 1; }

.cliente {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin: 22px 0 8px;
    padding: 18px 20px;
    border-radius: 12px;
    background: linear-gradient(135deg, #eef0ff, #e6fbf7);
    border: 1px solid var(--borde);
}
.cliente strong { display: block; font-size: 20px; }
.cliente small { color: var(--suave); }
.etiqueta { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--suave); }
.saldo { text-align: right; }
.saldo strong { color: var(--primario-oscuro); font-size: 24px; }

.vacio { color: var(--suave); }
.tabla-caja { overflow-x: auto; border: 1px solid var(--borde); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 16px; text-align: left; }
thead th { background: #f5f6ff; font-size: 13px; color: var(--suave); text-transform: uppercase; letter-spacing: .05em; }
tbody tr + tr td { border-top: 1px solid var(--borde); }
tbody tr:hover { background: #fafaff; }
.der { text-align: right; }

/* ---------- Móvil ---------- */
@media (max-width: 600px) {
    .barra { padding: 12px 16px; gap: 12px; }
    .enlaces { order: 3; flex-basis: 100%; }
    .usuario { margin-left: auto; }
    .contenido { padding: 22px 14px 50px; }
    .panel { padding: 20px 16px; }
    .fila-busqueda { flex-direction: column; }
    .saldo { text-align: left; }
}