/* Zona R · Tarjeta de autenticación compartida por admin/login.php, cliente/login.php
   y cliente/registro.php — misma tarjeta blanca centrada, solo cambia el fondo detrás. */
:root {
    --verde-primario: #1E7A42; --verde-oscuro: #0F5C30; --verde-claro: #EAF3DE;
    --amarillo-cta: #FFD400; --amarillo-texto: #412402; --gris-texto: #6B7280;
    --rojo: #B82525; --rojo-bg: #FDE8E8;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; font-family: 'Inter', sans-serif; padding: 20px; }
a { text-decoration: none; }

/* Fondo oscuro (panel admin) */
body.auth-bg-dark {
    background: radial-gradient(circle at 15% 20%, rgba(255, 212, 0, 0.16), transparent 55%),
                radial-gradient(circle at 85% 85%, rgba(255,255,255,0.08), transparent 50%),
                linear-gradient(135deg, var(--verde-oscuro) 0%, #093D1E 100%);
}
/* Fondo claro (cuentas de cliente) */
body.auth-bg-light {
    background: radial-gradient(circle at 15% 20%, rgba(30, 122, 66, 0.12), transparent 55%),
                radial-gradient(circle at 85% 85%, rgba(255, 212, 0, 0.12), transparent 50%),
                #F5F4EF;
}

.login-card { background: #fff; border-radius: 26px; padding: 40px 34px; width: 100%; max-width: 420px; box-shadow: 0 30px 70px rgba(15,92,48,0.14); }
body.auth-bg-dark .login-card { box-shadow: 0 30px 70px rgba(0,0,0,0.35); }
.brand { display: flex; align-items: center; gap: 10px; font-family: 'Baloo 2', cursive; font-size: 1.5rem; font-weight: 800; color: var(--verde-primario); margin-bottom: 6px; }
.brand i { color: var(--amarillo-cta); background: var(--verde-oscuro); border-radius: 10px; padding: 6px; font-size: 1.1rem; }
.login-card p.sub { color: var(--gris-texto); margin: 0 0 26px; font-size: 0.92rem; }
label { font-weight: 700; color: var(--verde-oscuro); display: block; margin-bottom: 8px; font-size: 0.88rem; }
.field-group { margin-bottom: 18px; }
.input-card { background: #F5F4EF; border: 1px solid #E7E5E0; border-radius: 14px; padding: 13px 15px; display: flex; align-items: center; gap: 10px; }
.input-card i { color: var(--verde-primario); }
input { width: 100%; border: none; background: transparent; font-size: 0.96rem; outline: none; font-family: inherit; color: #1F2937; }
.btn-cta { display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%; padding: 15px; border-radius: 999px; background: var(--amarillo-cta); color: var(--amarillo-texto); font-weight: 700; border: none; cursor: pointer; margin-top: 8px; font-size: 0.95rem; }
.alert-error { background: var(--rojo-bg); color: var(--rojo); border-radius: 14px; padding: 12px 16px; margin-bottom: 18px; font-size: 0.88rem; font-weight: 600; display: flex; gap: 8px; align-items: center; }
.back-link { display: block; text-align: center; margin-top: 20px; color: var(--gris-texto); font-size: 0.85rem; }
.swap-link { display: block; text-align: center; margin-top: 14px; color: var(--verde-primario); font-weight: 700; font-size: 0.88rem; }

@media (max-width: 380px) {
    .login-card { padding: 28px 22px; }
}