/* ==========================================================================
   VARIABLES DE COLOR (PALETA PRINCIPAL)
   ========================================================================== */
:root {
    /* Colores Base Hexadecimales */
    --bg-light: #F2F2F2;
    --text-dark: #0D0D0D;
    --brand-dark: #1F0459;
    --brand-primary: #8B3DD9;
    --brand-light: #CF7EF2;

    /* Valores RGB para aplicar transparencias (rgba) */
    --text-dark-rgb: 13, 13, 13;
    --brand-dark-rgb: 31, 4, 89;
    --brand-primary-rgb: 139, 61, 217;
    --brand-light-rgb: 207, 126, 242;
}

/* ==========================================================================
   DISEÑO MODERNO Y CORPORATIVO PARA LOGIN
   ========================================================================== */
body {
    background-color: var(--bg-light);
    font-family: 'Nunito', sans-serif;
}

#auth {
    min-height: 100vh;
    overflow-x: hidden;
}

/* ==========================================================================
   LADO IZQUIERDO (Formulario)
   ========================================================================== */
#auth-left {
    padding: 3rem 5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
    background-color: #ffffff; 
    position: relative;
    z-index: 10;
    box-shadow: 10px 0 30px rgba(var(--text-dark-rgb), 0.05); 
}

#auth-left .auth-logo {
    margin-bottom: 3rem;
    text-align: left;
}

#auth-left .auth-logo img {
    max-height: 100px;
    width: auto;
}

#auth-left .auth-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-dark); 
    margin-bottom: 0.5rem;
}

#auth-left .auth-subtitle {
    font-size: 1rem;
    color: var(--brand-dark); 
    opacity: 0.7;
    margin-bottom: 2.5rem;
}

/* Campos de entrada (Inputs) modernos */
.form-control.form-control-xl {
    padding: 1rem 1rem 1rem 3.2rem;
    font-size: 1rem;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    background-color: var(--bg-light); 
    color: var(--text-dark); 
    transition: all 0.3s ease;
}

.form-control.form-control-xl:focus {
    background-color: #ffffff;
    border-color: var(--brand-primary); 
    box-shadow: 0 0 0 4px rgba(var(--brand-light-rgb), 0.25); 
}

.form-control-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 1rem;
}

.form-control-icon i {
    color: #94a3b8;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

/* El icono cambia al enfocar */
.form-control:focus ~ .form-control-icon i {
    color: var(--brand-primary);
}

/* Botón principal */
#iniSesion {
    background-color: var(--brand-primary); 
    border-color: var(--brand-primary);
    color: #ffffff;
    border-radius: 12px;
    padding: 1rem;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    margin-top: 1.5rem;
}

#iniSesion:hover {
    background-color: var(--brand-dark); 
    border-color: var(--brand-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(var(--brand-primary-rgb), 0.3) !important; 
}

/* ==========================================================================
   LADO DERECHO (Imagen / Portada)
   ========================================================================== */
#auth-right {
    background: linear-gradient(135deg, rgba(var(--brand-dark-rgb), 0.85) 0%, rgba(var(--brand-primary-rgb), 0.6) 100%), url('../../images/bg/4853433.jpg');
    background-size: cover;
    background-position: center;
    height: 100vh;
}

/* ==========================================================================
   RESPONSIVE (Tablets y Móviles)
   ========================================================================== */
@media screen and (max-width: 1199px) {
    #auth-left {
        padding: 3rem;
    }
}

@media screen and (max-width: 991px) {
    #auth {
        background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-primary) 100%); 
    }
    
    #auth-left {
        padding: 2rem 1.5rem;
        background-color: transparent;
        box-shadow: none;
        align-items: center; 
    }

    #auth-left .auth-logo {
        background: #ffffff;
        padding: 15px 25px;
        border-radius: 16px;
        box-shadow: 0 10px 15px -3px rgba(var(--text-dark-rgb), 0.2); 
        margin-bottom: 2rem;
        text-align: center;
    }

    #auth-left .auth-title {
        color: var(--bg-light); 
        text-align: center;
    }

    #auth-left .auth-subtitle {
        color: var(--brand-light); 
        text-align: center;
        margin-bottom: 2rem;
    }

    /* Tarjeta flotante */
    #sessionOK {
        background: #ffffff;
        padding: 2.5rem 2rem;
        border-radius: 20px;
        box-shadow: 0 20px 25px -5px rgba(var(--text-dark-rgb), 0.2), 0 10px 10px -5px rgba(var(--text-dark-rgb), 0.1);
        width: 100%;
        max-width: 450px; 
    }
}

/* ==========================================================================
   ANIMACIONES DE ENTRADA (ESTILO APP PREMIUM)
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes imageReveal {
    from {
        opacity: 0;
        transform: scale(1.05);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

#auth-right {
    animation: imageReveal 1.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

#auth-left .auth-logo {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.1s forwards;
}

#auth-left .auth-title {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.2s forwards;
}

#auth-left .auth-subtitle {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.3s forwards;
}

#sessionOK .form-group:nth-child(1) {
    opacity: 0;
    animation: fadeInRight 0.6s ease-out 0.4s forwards;
}

#sessionOK .form-group:nth-child(2) {
    opacity: 0;
    animation: fadeInRight 0.6s ease-out 0.5s forwards;
}

#iniSesion {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.6s forwards;
}

@media screen and (max-width: 991px) {
    #sessionOK {
        opacity: 0;
        animation: fadeInUp 0.8s ease-out 0.4s forwards;
    }
    
    #sessionOK .form-group:nth-child(1),
    #sessionOK .form-group:nth-child(2),
    #iniSesion {
        opacity: 1;
        animation: none;
    }
}