/* Reset global */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Segoe UI', Roboto, sans-serif;
    }

    body {
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        background-color: #f4f7fa; /* Fondo claro base (gris azulado muy suave) */
        
        /* IMAGEN DE FONDO: Capa clara sobre tu logo corporativo */
        /* background-image: linear-gradient(135deg, rgba(244, 247, 250, 0.9), rgba(226, 232, 240, 0.95)), 
                            url('tu-logo-redondo.png');  */
        
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
        position: relative;
        overflow: hidden;
    }

    /* Marca de agua del logo gigante en el fondo claro */
    body::before {
        content: "";
        position: absolute;
        width: 650px;
        height: 650px;
        /* background: url('tu-logo-redondo.png') no-repeat center; */
        background-size: contain;
        opacity: 0.05; /* Muy tenue para que no interfiera con la lectura */
        right: -80px;
        bottom: -80px;
        pointer-events: none;
    }

    /* Tarjeta de Login (Fondo Blanco Sólido y Nítido) */
    .login-card {
        background: #ffffff;
        border: 1px solid #e2e8f0;
        padding: 40px;
        border-radius: 20px;
        width: 100%;
        max-width: 420px;
        box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
        text-align: center;
        z-index: 10;
    }

    /* Cabecera */
    .brand-header {
        margin-bottom: 32px;
    }

    .brand-logo {
        width: 75px;
        height: 75px;
        border-radius: 50%;
        background: #f8fafc;
        border: 2px solid #e2e8f0;
        padding: 4px;
        margin-bottom: 16px;
        display: inline-block;
    }

    .brand-header h1 {
        color: #0f172a; /* Texto oscuro principal */
        font-size: 24px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }

    .brand-header p {
        color: #64748b; /* Texto secundario gris */
        font-size: 14px;
        margin-top: 6px;
    }

    /* Formulario */
    .form-group {
        margin-bottom: 22px;
        text-align: left;
    }

    .form-group label {
        display: block;
        color: #475569;
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 8px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    .form-group input {
        width: 100%;
        padding: 14px 16px;
        background: #f8fafc;
        border: 2px solid #e2e8f0;
        border-radius: 12px;
        color: #0f172a;
        font-size: 15px;
        outline: none;
        transition: all 0.2s ease;
    }

    /* Enfoque de los campos adaptado al estilo claro */
    .form-group input:focus {
        border-color: #0284c7; /* Azul Gestec */
        background: #ffffff;
        box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.1);
    }

    /* Opciones secundarias */
    .form-options {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 30px;
        font-size: 13px;
    }

    .form-options label {
        color: #64748b;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .form-options a {
        color: #0284c7;
        text-decoration: none;
        font-weight: 500;
    }

    .form-options a:hover {
        text-decoration: underline;
    }

    /* Botón de acción principal */
    .btn-submit {
        width: 100%;
        padding: 14px;
        background: #0284c7; /* Azul Gestec */
        color: #ffffff;
        border: none;
        border-radius: 12px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s ease;
        box-shadow: 0 4px 12px rgba(2, 132, 199, 0.2);
    }

    .btn-submit:hover {
        background: #0369a1;
        transform: translateY(-1px);
        box-shadow: 0 6px 20px rgba(2, 132, 199, 0.3);
    }

    .btn-submit:active {
        transform: translateY(0);
        }