body {
    margin: 0;
    height: 100vh;
    background: url("/static/img/bg.jpg") no-repeat center center;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', sans-serif;
}

/* capa oscura para contraste */
.overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

/* contenedor */
.login-container {
    position: relative;
    z-index: 2;
}

/* caja */
.login-card {
    width: 380px;
    padding: 30px;
    border-radius: 12px;
    background: rgba(255,255,255,0.95);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    text-align: center;
}

/* logo */
.login-logo {
    max-width: 180px;
    margin-bottom: 20px;
}

/* título */
.login-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
}

/* inputs */
.form-control {
    height: 45px;
    border-radius: 8px;
}

/* botón */
.btn-login {
    height: 45px;
    border-radius: 8px;
    font-weight: 600;
}